SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of the

Securities Exchange Act of 1934

For the month of November 2013

Commission File Number 1-13758

PORTUGAL TELECOM, SGPS, S.A.

(Exact name of registrant as specified in its charter)

Av. Fontes Pereira de Melo, 40
1069 - 300 Lisboa, Portugal

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F  x         Form 40-F  o

 Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes  o                No  x

First Nine Months 2013

Earnings Release

13 November 2013

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Earnings Release

Lisbon, Portugal, 13 November 2013

In 9M13, consolidated operating revenues amounted to Euro 4,547 million and consolidated EBITDA stood at Euro 1,514 million with an EBITDA margin of 33.3%. Excluding the impact of foreign currency movements against the Euro, consolidated operating revenues would have decreased by 1.7% y.o.y and EBITDA by 6.6% y.o.y in 9M13. Revenues from Portuguese telecommunications businesses decreased by 5.9% y.o.y to Euro 1,920 million and EBITDA by 10.2% y.o.y to Euro 823 million. In 9M13, fully and proportionally consolidated international assets represented 57.2% and 49.1% of PT’s consolidated revenues and EBITDA, respectively. Net income reached Euro 305 million in 9M13. In 9M13, capex amounted to Euro 864 million, equivalent to 19.0% of revenues, while capex from Portuguese telecommunications businesses stood at Euro 337 million, down by 9.1% y.o.y, notwithstanding the investments in the rollout of the Data Centre in Covilhã, inaugurated on 23 September 2013. In 9M13, EBITDA minus capex reached Euro 651 million, while EBITDA minus capex of the Portuguese telecommunications businesses amounted to Euro 486 million. In 9M13, operating cash flow stood at Euro 489 million, while free cash flow amounted to Euro 65 million. Excluding Oi and Contax, free cash flow amounted to Euro 322 million in 9M13. As at 30 September 2013, net debt adjusted for unused tax credits related to the transfer of the regulated pension plans to the Portuguese State amounted to Euro 7,574 million, and excluding the proportional consolidation of Oi and Contax, amounted to Euro 4,620 million. In 9M13, cost of net debt, excluding the proportional consolidation of Oi and Contax, reached 5.3% and cost of gross debt stood at 4.7%, with an average maturity of 5.7 years as at 30 September 2013.

(1) 2012 figures were restated in order to reflect the impacts of the adoption of the revised version of IAS 19 Employee Benefits, as explained in more detail under the section “Other disclosures, changes in accounting policies and estimates”. (2)  Operating costs = wages and salaries + direct costs + commercial costs + other operating costs.  (3) EBITDA = income from operations + post retirement benefits + depreciation and amortisation. (4) Income from operations = income before financials and income taxes + curtailment costs + losses (gains) on disposal of fixed assets + net other costs (gains). (5) Net debt was adjusted for the unused tax credits related to the transfer of the regulated pension plans to the Portuguese State. (6) EBITDA margin = EBITDA / operating revenues. (7) Earnings per share computed using net income excluding the costs associated with the convertible bonds divided by the diluted number of shares.

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02

Financial Review

Income Statement

(1) 2012 figures were restated in order to reflect the impacts of the adoption of the revised version of IAS 19 Employee Benefits, as explained in more detail under the section “Other disclosures, changes in accounting policies and estimates”. (2)  Businesses in Portugal include wireline and TMN. (3) Operating costs = wages and salaries + direct costs + commercial costs + other operating costs. (4) EBITDA = income from operations + post retirement benefits + depreciation and amortisation. (5) Income from operations = income before financials and income taxes + curtailment costs + losses (gains) on disposal of fixed assets + net other costs (gains).

In 9M13, consolidated operating revenues decreased by Euro 437 million to Euro 4,547 million (-8.8% y.o.y), reflecting primarily the impact of the depreciation of the Brazilian Real against the Euro (Euro 328 million). On a constant currency basis, namely adjusting for the impact of the depreciation of the Brazilian Real and of the Namibian Dollar, consolidated operating revenues would have declined only by 1.7% y.o.y in 9M13. This performance is explained by revenue decline in the Portuguese telecommunications businesses (Euro 120 million) and a lower contribution from other international operations, namely Contax, CVT and Timor Telecom, which more than offset higher contributions from Oi and MTC (Euro 37 million and Euro 17 million, respectively).

In 9M13, revenues from Portuguese telecommunications businesses decreased by 5.9% y.o.y to Euro 1,920 million, while service revenues decreased by 6.5% y.o.y, having improved the quarterly trend when comparing the 3Q13 (-

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5.8% y.o.y) to 2Q13 (-7.0% y.o.y), 1Q13 (-6.7% y.o.y) and 4Q12 (-8.2% y.o.y). Revenue performance continued to be impacted by the pricing and competitive dynamics and by the macroeconomic environment. Against this backdrop, in 9M13 PT posted continued growth in the Residential segment and presented improved trends in the Personal segment. Private consumption in Portugal decreased by 3.1% in 2Q13, while PT’s consumer segment, which includes Residential and Personal segments, posted customer revenues decreasing by 1.5% in 3Q13, outperforming the market and competitors. This performance proves the success of PT’s offering, namely M4O, which is gaining momentum in the market, having reached 1.3 million RGUs in November 2013. The Enterprise segment is penalised by competitive dynamics that are impacting pricing environment, namely in mobile services, notwithstanding an improved performance from Corporate in 3Q13. Revenues from Wholesale, other and eliminations in 9M13 decreased by 6.3% y.o.y to Euro 298 million, reflecting lower acesses and capacity revenues and a Euro 7 million decline in the directories business (-27.0% y.o.y) reflecting secular trends.

Oi’s revenues proportionally consolidated stood at Euro 2,050 million (R$ 22,356 million, equivalent to 100%) in 9M13, compared to Euro 2,296 million (R$ 22,002 million, equivalent to 100%) in 9M12, a decrease of Euro 245 million reflecting the impact of the depreciation of the Brazilian Real against the Euro (Euro 282 million). On a constant currency basis, the contribution of Oi to PT’s consolidated operating revenues in 9M13 would have amounted to Euro 2,332 million, representing an increase of Euro 37 million primarily explained by: (1) higher revenues from Residential, due to the positive contribution of broadband and pay-TV revenues, that more than offset lower fixed voice revenues, and (2) an increase in Personal Mobility revenues, on the back of the strong performance in prepaid recharges and also of data and value added services and against a backdrop of lower MTRs. Oi’s revenues were proportionally consolidated based on the 25.6% direct and indirect stake that PT owns in Telemar Participações, the controlling shareholder of the Oi Group.

Other revenues, including intra-group eliminations, decreased by Euro 72 million (-11.1% y.o.y) to Euro 576 million  in 9M13, reflecting the depreciation of the Brazilian Real and Namibian Dollar against the Euro (Euro 72 million). Adjusting for this effect, other revenues would remained broadly flat at Euro 648 million as the higher contribution from MTC, mainly due to higher retail voice revenues and a significant increase in data services, was offset by a lower contribution from Contax (Euro 6 million), reflecting lower revenues from Brazilian call centre services, and by an increasing level of competition in some markets.

The contribution from fully and proportionally consolidated international assets to consolidated operating revenues stood at 57.2% in 9M13, with Brazil accounting for 52.1%, as compared to 58.5% and 53.4% in 9M12, respectively, a decrease that is explained by the impact of the depreciation of the Brazilian Real against the Euro.

In 9M13, consolidated EBITDA decreased by Euro 214 million (-12.4% y.o.y) to Euro 1,514 million, as compared to Euro 1,729 million in 9M12, mainly due to: (1) the EBITDA decline in the Portuguese telecommunications businesses (Euro 93 million, -10.2% y.o.y), primarily due to lower revenues (Euro 120 million) as explained above; (2) the impact of the depreciation of the Brazilian Real against the Euro (Euro 87 million), and (3) a lower contribution from Oi on a constant currency basis (Euro 15 million), primarily explained by an increase in commercial costs, external services and lower provision levels in 9M12. Other EBITDA decreased by 19.9% y.o.y (Euro 25 million) to Euro 101 million in 9M13, reflecting the depreciation of the Brazilian Real and other negative currency effects (Euro 19 million). On a constant currency basis, EBITDA from other businesses would have decreased by Euro 6 million, mainly due to lower contributions from other international operations, namely Contax, CVT and Timor Telecom. Additionally, excluding the impact of foreign currency movements against the Euro, consolidated EBITDA would have declined by 6.6% y.o.y in 9M13.

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(1) EBITDA = income from operations + post retirement benefits + depreciation and amortisation. (2) EBITDA margin = EBITDA / operating revenues

In 9M13, EBITDA from the Portuguese telecommunications businesses amounted to Euro 823 million (-10.2% y.o.y), equivalent to a 42.8% margin, having improved the quarterly trend when comparing the 3Q13 (-9.1% y.o.y) to 2Q13 (-9.7% y.o.y) and 1Q13 (-11.7% y.o.y). The EBITDA performance is the result of the decline in service revenues (Euro 125 million), which have high operating leverage, and also of lower margin in new services provided by the Enterprise segment. In effect, in a context where service revenues minus direct costs declined by Euro 123 million, EBITDA declined only by Euro 93 million, reflecting a continuous focus on cost cutting and efficiency gains. EBITDA performance in Portugal was also penalised by a continuous decline in the directories business.

In 9M13, Oi’s proportional consolidated EBITDA stood at Euro 591 million (R$ 6,441 million, equivalent to 100%), with an EBITDA margin of 28.8%, compared to Euro 687 million (R$ 6,585 million, equivalent to 100%) in 9M12. The Euro 96 million decrease includes the impact of the depreciation of the Brazilian Real against the Euro (Euro 81 million). On a constant currency basis, the contribution of Oi to PT’s consolidated EBITDA would have decreased by Euro 15 million over the same period of last year, to Euro 672 million in 9M13, reflecting higher external services, mainly due to increased maintenance expenses that reflect customer growth and focus on improving quality, and also higher commercial costs, namely commission expenses, reflecting increased commercial activity. These effects more than offset the increase in revenues mentioned above.

Fully and proportionally consolidated international assets represented 49.1% of PT’s consolidated EBITDA in 9M13, while the Brazilian businesses accounted for 41.7% of EBITDA in the period, as compared to 50.0% and 42.6% in 9M12, respectively.

Post retirement benefits costs decreased from Euro 47 million in 9M12 to Euro 37 million in 9M13 due to a lower contribution from the Portuguese telecommunications business (Euro 11 million), which reflects the reduction in the discount rates undertaken at the end of 2012, leading to a lower net interest cost in 9M13. Post retirement benefits costs in 2012 were restated in order to reflect the impact of the adoption of the revised version of IAS 19 Employee Benefits. Additional information is available under the section “Other disclosures, changes in accounting policies and estimates”.

Depreciation and amortisation costs amounted to Euro 1,001 million in 9M13, compared to Euro 1,038 million in 9M12. Adjusting for the impact of the depreciation of the Brazilian Real against the Euro (Euro 63 million), depreciation and amortisation costs would have increased by 2.6% y.o.y (Euro 27 million) to Euro 1,064 million in 9M13. This increase is explained primarily by a higher contribution from Oi (Euro 53 million, on a constant currency basis) reflecting the amortisation of the 4G-LTE license acquired in June 2012 and also increased investments made in 2013 as compared to 2012, namely in the coverage and capacity of Oi’s 2G and 3G networks, and in the capacity, capillarity and quality of the wireline and broadband networks. The higher depreciation and amortisation costs at Oi were partially offset by lower depreciation and amortisation costs in the Portuguese telecommunications businesses (Euro 28 million), reflecting the decline in capex occurred throughout 2012 against the backdrop of the investments in future proof technologies and networks undertaken in previous years, namely in FTTH and 4G-LTE coverage.

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Curtailment costs amounted to Euro 128 million in 9M13 reflecting mainly a redundancy programme of approximately 400 employees implemented in 2Q13.

Net gains on disposals of fixed assets amounted to Euro 18 million in 9M13, as compared to net losses of Euro 2 million in 9M12, reflecting primarily the capital gains recorded by Oi in 3Q13, totalling approximately Euro 16 million, in connection with the disposal of certain real estate properties.

Net other gains amounted to Euro 78 million in 9M13, compared to Euro 9 million in 9M12. In 9M13, this caption includes: (1) a gain resulting from the settlement of contractual obligations related to the acquisition of the investment in Oi in 2011, by a lower amount than the liability initially recognised; (2) a gain related to the wireline Concession Agreement, and (3) certain provisions and adjustments recognised in order to adjust the carrying value of certain assets to the corresponding recoverable amounts. In 9M12, this caption included a gain related to the net compensation for prior years costs supported by PT with the universal service obligation under the Concession Agreement net of provisions and adjustments recognised in order to adjust the carrying value of certain assets to the corresponding recoverable amounts.

Net interest expenses increased to Euro 426 million in 9M13 as compared to Euro 369 million in 9M12, reflecting primarily: (1) an increase in the average cost of net debt excluding the proportional consolidation of Oi and Contax, from 4.2% in 9M12 to 5.3% in 9M13, mainly as a result of a lower return on cash applications and also an increase in the cost of gross debt from 4.4% in 9M12 to 4.7% in 9M13, and (2) a higher contribution from Oi, Contax and its controlling shareholders, including the impact of the increase in its average net debt, that more than compensated the reduction in the cost of debt in Brazil and the impact of the depreciation of the Brazilian Real against the Euro. The increase in Oi’s net debt is mainly explained by: (1) payments made in April 2012 in connection with Oi’s corporate simplification; (2) the negative free cash flow generated in 2012 and in 2013, also reflecting legal action payments, and (3) the dividends paid in May and August 2012 and in March and April 2013.

Equity in earnings of affiliates amounted to Euro 411 million in 9M13, including a Euro 310 million gain related to the disposal of the investment in CTM. Adjusting for this impact and PT’s share in the earnings of CTM in 9M12 (Euro 20 million), equity in earnings of affiliates would have amounted to Euro 101 million in 9M13, a decrease from Euro 140 million in 9M12, mainly due to changes in corporate tax and currency effects in 2013, as operationally equity investments continue to perform.

Net other financial losses, which include net foreign currency losses, net losses on financial assets and net other financial expenses, increased from Euro 69 million in 9M12 to Euro 89 million in 9M13, reflecting primarily: (1) higher foreign currency losses (Euro 14 million), mainly due to the impact of the depreciation of the US Dollar against the Euro, and (2) higher net other financial expenses mainly related to financial taxes and certain banking services.

Income taxes amounted to a gain of Euro 5 million in 9M13, as compared to a loss of Euro 115 million in 9M12, due to lower taxable earnings across all businesses, reflecting higher curtailment charges and interest expenses.

Income attributable to non-controlling interests amounted to Euro 40 million in 9M13 and Euro 72 million in 9M12. The reduction of Euro 32 million reflects a lower income attributable to non-controlling interests of: (1) the African businesses (Euro 15 million), mainly due to corporate tax and currency effects, and (2) Oi (Euro 12 million), as a result of the completion of its corporate simplification in March 2012.

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Net income amounted to Euro 305 million in 9M13 compared to Euro 186 million in 9M12. This increase is explained primarily by: (1) the gain recorded in connection with the sale of the investment in CTM, and (2) higher non-recurring gains. These effects were partially offset by: (1) lower EBITDA from Portuguese telecommunications business; (2) the curtailment costs reflecting a redundancy programme of approximately 400 employees; (3) higher depreciation and amortisation costs at Oi, reflecting increased capex during the last years, and (4) higher interest expenses at both Portuguese and Brazilian operations.

Capex

Capex amounted to Euro 864 million in 9M13, equivalent to 19.0% of revenues, as compared to Euro 890 million in 9M12. Excluding the impact of the depreciation of the Brazilian Real and of the Namibian Dollar against the Euro (Euro 62 million and Euro 6 million, respectively), capex would have increased by 4.7% y.o.y in 9M13. This increase is explained by a higher contribution from Oi (Euro 77 million on a constant currency basis), reflecting the investments made in 3G coverage and capacity, in the initial rollout of the 4G-LTE network and in IT services, mainly related to system updates and upgrades. Oi’s higher contribution was partially offset by a lower contribution from Portuguese telecommunications businesses (Euro 34 million), which stood at Euro 337 million in 9M13, notwithstanding the investments made during 9M13 in the rollout of the Data Centre in Covilhã, inaugurated on 23 September 2013. Excluding this effect, capex in Portuguese telecommunications businesses would have declined by Euro 70 million to Euro 300 million (-19.0% y.o.y). Capex in the Portuguese telecommunications businesses is expected to be more demand driven, given the recent investments in the modernisation of the networks and in technology, and in 2013 and 2014 should be below Euro 500 million and Euro 400 million, respectively. Capex from other businesses decreased by 9.7% y.o.y to Euro 87 million in 9M13, reflecting mainly the impact of the depreciation of the Brazilian Real and Namibian Dollar against the Euro (Euro 7 million) and also lower capex at CVT and CST, following the investments realised in 2012 in the rollout of the submarine cable.

Cash Flow

In 9M13, operating cash flow stood at Euro 489 million as compared to Euro 617 million in 9M12. This decline in operating cash flow (Euro 127 million) is explained by: (1) a lower EBITDA minus Capex (Euro 188 million), reflecting the Euro 113 million and Euro 59 million declines in the EBITDA minus capex of the Brazilian and Portuguese telecommunications businesses, respectively, and (2) lower provisions and adjustments (Euro 20 million), which represented non-cash items included in EBITDA, mainly related to Oi. The decline in EBITDA minus capex was partially offset by a lower working capital investment (Euro 80 million), reflecting primarily cash inflows from certain non-core transactions undertaken by Oi in 9M13 and a lower capex in 4Q12 when compared to 4Q11 that translated to lower cash payments to supliers in 9M13 when compared to 9M12. Excluding the proportional consolidation of Oi and Contax, operating cash-flow in 9M13 would have amounted to Euro 380 million, as compared to Euro 413 million in 9M12, as a result of lower working capital investments as referred to above, which compensated the lower EBITDA minus capex observed in the period.

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(1) In 9M13 and 9M12, this caption includes payments related to the transferred regulated pension plans to the Portuguese State amounting to Euro 16.0 million and Euro 19.7 million, respectively.

In 9M13, consolidated free cash flow amounted to Euro 65 million, while in 9M12 stood at a negative Euro 264 million, reflecting: (1) the proceeds from the sale of CTM, amounting to Euro 336 million; (2) lower payments regarding legal actions and judicial deposits in Brazil (Euro 108 million), and (3) lower income tax payments (Euro 45 million), both at domestic and foreign operations. These effects were partially offset by a lower operating cash flow (Euro 127 million), as referred to above.

Excluding the proportional consolidation of Oi and Contax, free cash flow in 9M13 would have amounted to Euro 322 million, compared to Euro 183 million in 9M12, reflecting in both periods the strong working capital investments that usually occur in the first quarter regarding capital expenditures incurred during the fourth quarter of the previous year, although benefiting from the sale of CTM in 2Q13. The Euro 138 million improvement reflects the proceeds from the sale of CTM (Euro 336 million) and lower income tax payments (Euro 13 million). These effects were partially offset by: (1) lower dividends received from Oi (Euro 125 million), reflecting the R$ 3 billion dividends paid by Oi in 9M12 (R$ 2 million relating to the year 2011 and R$ 1 billion as an advance over 2012 profits) as compared to R$ 1.0 billion paid in 9M13 (the remaining R$ 1 billion relating to the year 2012), (2) lower operating cash flow (Euro 33 million); (3) lower dividends received from associates (Euro 31 million), namely Unitel in Angola, and (4) higher interest payments (Euro 25 million).

Consolidated Net Debt

Consolidated net debt excluding the proportional consolidation of Oi, Contax and its controlling holding companies and adjusted for unused tax credits related to payments made to the Portuguese State in connection with the pensions transaction amounted to Euro 4,620 million as at 30 September 2013, stable when compared to Euro 4,609 million as at 30 June 2013, despite the payment of dividends by subsidiaries to other shareholders, negative currency impacts on cash deposits and payments related to the settlement of a contractual obligation that was already booked in 2Q13.

Total consolidated net debt amounted to Euro 7,763 million as at 30 September 2013, as compared to Euro 7,711 million as at 31 December 2012, an increase of Euro 52 million reflecting primarily: (1) the dividends paid by PT to its shareholders (Euro 278 million, adjusted for the effect of the 10% stake owned by Oi in PT and proportionaly consolidated) and by PT’s subsidiaries to non-controlling interests (Euro 52 million), and (2) the agreement reached by Oi in July 2013 for the disposal of its submarine cable operation, following which the related cash position was included under the held for sale balance sheet caption (Euro 26 million). These effects were partially offset by the

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positive free cash flow generated in the period (Euro 65 million) and the impact of the depreciation of the Brazilian Real against the Euro, which resulted in a net debt decrease by Euro 255 million.

(1) This caption includes a payment made in 1Q12 in connection with the 4G-LTE license acquired in Portugal, the dividends paid by PT’s subsidiaries to non-controlling interests and the effect related to the disposal by Oi of its submarine cable operation. (2) This caption corresponds to the unused tax credits on the amounts paid to the Portuguese State in December 2011 and 2012 under the transfer of unfunded pension obligations.

As at 30 September 2013, total consolidated gross debt amounted to Euro 10,691 million, of which 82.8% was medium and long-term and Euro 3,340 million relates to the proportional consolidation of Oi, Contax and its controlling shareholders. Excluding the effect of this proportional consolidation, gross debt would have amounted to Euro 7,350 million, of which 81.0% was medium and long-term, reflecting the 2020 one billion Eurobond issued in 2Q13, and 82.5% was set at fixed rates.

Excluding the proportional consolidation of Oi and Contax, the amount of cash available plus the undrawn amount of PT’s committed commercial paper lines and facilities totalled Euro 3,312 million at the end of September 2013, which includes Euro 771 million of undrawn committed commercial paper lines and facilities.

Excluding the proportional consolidation of Oi and Contax, PT’s average cost of net debt stood at 5.3% in 9M13, compared to 4.2% in 9M12, reflecting a lower return on cash applications and also a higher cost of gross debt, which stood at 4.7% in 9M13 and 4.4% in 9M12. Excluding Oi and Contax, the cost of gross and net debt in 3Q13 remained stable when compared to 2Q13 and 1Q13. The maturity of PT’s net debt excluding Oi and Contax was 5.7 years as at 30 September 2013, benefiting from the 1 billion 7-year Eurobond issued in May 2013 and the repayment in April 2013 of the 1 billion Eurobond issued in 2009.

Post Retirement Benefit Obligations

As at 30 September 2013, the projected post retirement benefit obligations (PBO) from Portuguese operations related to pension complements and healthcare amounted to Euro 501 million and the market value of assets under management amounted to Euro 379 million, compared to Euro 503 million and Euro 399 million as at 31 December 2012, respectively. In addition, PT had liabilities in the form of salaries due to suspended and pre-retired employees amounting to Euro 749 million as at 30 September 2013, already including the curtailment costs recorded in 9M13 (Euro 730 million as at 31 December 2012), which are not subject to any legal funding requirement. These monthly salaries are paid directly by PT to the beneficiaries until retirement age. As a result, total gross unfunded obligations from Portuguese businesses amounted to Euro 870 million and after-tax

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unfunded obligations amounted to Euro 653 million. In addition, PT proportionally consolidates Oi’s net post retirement benefit obligations, which amounted to Euro 62 million as at 30 September 2013 and Euro 73 million as at 31 December 2012.

Total gross unfunded obligations from Portuguese businesses increased by Euro 37 million to Euro 870 million as at 30 September 2013, reflecting primarily curtailment charges (Euro 128 million), post retirement benefit costs (Euro 16 million) and net actuarial losses recorded in the period (Euro 14 million), which more than offset payments of salaries to suspended and pre-retired employees, amounting to Euro 117 million in 9M13. Unfunded obligations from Oi decreased from Euro 73 million as at 31 December 2012 to Euro 62 million as at 30 September 2013, reflecting a contribution made in January 2013 to cover the deficit position of the BrTPREV pension plan (Euro 9 million) and the impact of the depreciation of the Brazilian Real against the Euro (Euro 8 million), which were partially offset by post retirement benefit costs recorded in the period (Euro 5 million).

(1) The financial statements of 2012 were adjusted in order to reflect the impacts resulting from the adoption of the revised version of IAS 19 Employee Benefits, as explained in more detail under the section “Other disclosures, changes in accounting policies and estimates”.

(1) The financial statements of 2012 were adjusted in order to reflect the impacts resulting from the adoption of the revised version of IAS 19 Employee Benefits, as explained in more detail under the section “Other disclosures, changes in accounting policies and estimates”. (2) In 9M13 and 9M12, this caption excludes the service cost associated with active employees who were entitled to pension benefits related to the regulated pension plans transferred to the Portuguese State amounting to Euro 16.2 million and Euro 16.7 million, respectively. (3) This caption includes primarily contributions to pension funds made by Oi (Euro 8.5 million in 9M13 and Euro 10.4 million in 9M12), minus the net reimbursements obtained from the healthcare plans.

Equity

As at 30 September 2013, shareholders’ equity excluding non-controlling interests amounted to Euro 1,924 million, representing a decrease of Euro 380 million in 9M13, when compared to Euro 2,305 million as at 31 December 2012. This decrease is primarily explained by: (1) negative foreign currency translation adjustments generated in the period (Euro 385 million), which mainly relate to the impact of the depreciation of the Brazilian Real against the Euro; (2) dividends paid to PT’s shareholders in May 2013 (Euro 278 million), and (3) net actuarial losses recorded in the period (Euro 10 million, net of taxes). These effects more than offset the net income generated in the period amounting to Euro 305 million.

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(1) 2012 figures were restated in order to reflect the impacts of the adoption of the revised version of IAS 19 Employee Benefits, as explained in more detail under the section “Other disclosures, changes in accounting policies and estimates”.

Consolidated Statement of Financial Position

(1) 2012 figures were restated in order to reflect the impacts of the adoption of the revised version of IAS 19 Employee Benefits, as explained in more detail under the section “Other disclosures, changes in accounting policies and estimates”.

Total assets decreased to Euro 18.5 billion as at 30 September 2013 compared to Euro 20.1 billion as at 31 December 2012, reflecting the impact of the depreciation of the Brazilian Real against the Euro (Euro 1.1 billion) and the dividends paid in 2Q13 to PT’s shareholders (Euro 0.28 billion). Total liabilities stood at Euro 16.1 billion as at 30 September 2013 compared to Euro 17.2 billion as at 31 December 2012, reflecting mainly the impact of the depreciation of the Brazilian Real against the Euro (Euro 0.7 billion).

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03

Operational Review

Portuguese Telecommunications Businesses

In 3Q13, the Portuguese telecommunications businesses continued to show stable customer growth, with the fixed retail customers growing by 2.6% y.o.y to 5,137 thousand (net additions reached 21 thousand in 3Q13), and mobile customers up by 5.7% y.o.y to 7,807 thousand (117 thousand net additions in 3Q13 driven mainly by postpaid, reflecting 109 thousand postpaid net additions), on the back of the success of PT’s offering, namely M4O, which continued gaining momentum, having reached 1.3 million RGUs in November 2013.

Portuguese operating data

Growth of fixed retail customers was underpinned by a solid performance of MEO, PT’s pay-TV service, with pay-TV customers up by 8.0% y.o.y to 1,294 thousand (net additions of 23 thousand in 3Q13), confirming the continued success and the attractiveness of MEO in the Portuguese market, even against a backdrop of difficult economic environment and already high penetration of pay-TV. PT’s triple-play customers (voice, broadband and pay-TV) grew by 14.8% y.o.y, having reached 921 thousand in 3Q13 (27 thousand net additions in the quarter).

In 3Q13, mobile customers benefited from the performance of postpaid customers, which grew by 12.9% y.o.y to 2,782 thousand (109 thousand net additions in 3Q13), benefiting from the launch of the convergent offer M4O, which is leading to a prepaid to postpaid migration in mobile customer base. Mobile prepaid customers grew by 2.1% y.o.y in 3Q13 to 5,025 thousand, benefiting from the continued success of the new “Moche” tariff plans (+37.0% y.o.y in 3Q13 to 1,864 thousand customers with 71 thousand net additions in the quarter).

Residential

In 3Q13, residential retail accesses or retail revenue generating units (RGUs) increased by 2.3% y.o.y, reaching 3,878 thousand, with pay-TV and broadband accesses already accounting for 56.9% of total residential retail accesses as at 30 September 2013. In 3Q13, MEO, PT’s pay-TV service reached 1,167 thousand customers (+4.8% y.o.y), which accounted for 12 thousand net additions, while fixed residential broadband reached 1,041 thousand customers with 4 thousand net additions. Unique customers in the residential segment reached 1,854 thousand while triple-play customers stood at 818 thousand (+10.1% y.o.y) and already represented 44.1% of PT’s residential customers,

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extending its leadership in this market. The continued and sustainable growth of triple-play bundles and of pay-TV and fixed broadband in the residential segment has lead to a stable ARPU of Euro 31.7 and to an increase of RGU’s per unique customer from 2.02 in 3Q12 to 2.09 in 3Q13, despite a lower contribution from other value added services as economic conditions in Portugal, namely available income and consumption, still show declining trends.

Residential operating data

MEO’s experience is now convergent. As of 11 January 2013, in line with its strategy for the Residential and Personal segment which focuses on the fixed-mobile and services convergence, PT presented the new MEO, with a rebranding and the launch of PT’s first quadruple-play offer: M4O, which is a truly fixed-mobile convergent service, including pay-TV, broadband and fixed and mobile voice. M4O offers 120 channels, up to 100 Mbps broadband speed (24 Mbps of broadband speed over ADSL 2+), unlimited calls and two to four mobile SIM cards including unlimited voice and SMS to all wireline and wireless networks, on the back of PT’s 3G and 4G-LTE networks. Recently, M4O was made available also through Satellite, which has allowed PT to expand this convergent offer throughout the entire country. M4O Satellite offers the same package, with the only difference being the channel offering. PT also launched a new package named M3O that allows the customer to choose the same features as M4O Satellite, but without the internet access for a monthly fee that is Euro 15 lower.

Under a clear and strong strategy for content differentiation through interactivity that MEO has been pursuing since its launch, in 3Q13 it launched two new interactive red button applications over linear channels, featuring an application over the most successful TV programmes in Portugal: (1) “X Factor”, developed in partnership with SIC, and (2) “I love it”, a youth TV series, developed in partnership with TVI. In 3Q13, leveraging on the fourth edition of Secret Story, the notorious reality show on TVI, MEO launched an exclusive Secret Story channel in late September 2013, following the success of the previous ones, airing live 24h of the Secret Story house, with an interactive application that allowed customers to select the camera from which they wanted to follow contestants in the show and delivered exclusive content.

MEO marketing campaigns continue to enjoy the highest notoriety in the Portuguese pay-TV market. In 3Q13, MEO aired a new campaign, “Mundo MEO”, to strengthen its market position as an innovative brand. This campaign describes MEO’s key diferentiating features: (1) MEO Kanal; (2) MEO Karaoke; (3) PVR-experience; (4) interactive apps, and (5) Music Box. Following this continuous investment in MEO branding, in September 2013, MEO was awarded by Meios e Publicidade, an independent Portuguese specialised magazine, as the brand of the year.

Service revenues in the Residential segment reached Euro 177 million, up by 0.6% y.o.y and continued showing growth on the back of positive net adds, notwithstanding increased competitive aggressiveness, namely by a

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smaller player, already high pay-TV penetration and the shifting of market share gains coming from market expansion to best value proposition. This performance was achieved on the back of the continued strong performance of MEO triple-play offer, resulting on an increase in RGU’s per unique customer. As a result of the higher penetration of triple-play offers, the weight of non-voice services in Residential service revenues stood at 65.8% (+2.3pp y.o.y) in 3Q13 and the weight of flat revenues stood at 89.1% (+2.0pp y.o.y).

Personal

In 3Q13, mobile Personal customers, including voice and broadband customers, increased by 7.7% y.o.y improving further the momentum observed in the previous quarters (2Q13: +5.6% y.o.y; 1Q13: +3.2% y.o.y; 4Q12: +1.5% y.o.y; 3Q12: -1.1% y.o.y; 2Q12: -1.1% y.o.y, and 1Q12: -0.9% y.o.y). In 3Q13, mobile Personal customers registered 134 thousand net additions (9 thousand in 3Q12), underpinned by the solid performance in postpaid (117 thousand net additions in 3Q13). This performance is anchored on the strong commercial success of M4O, which is underpinning the transformation of the Portuguese mobile market by introducing convergence, which allows additional differentiation of commercial offers, while at the same time is shifting the focus from prepaid to postpaid. In fact, according to Anacom, PT has gained market share in 2Q13 for the third consecutive quarter, while the market decreased in the last two quarters. The results obtained show a solid and continued growth in fixed and mobile RGUs. As at November 2013, total RGUs associated with M4O amounted to circa 1.3 million and 43% of gross adds are new RGUs to PT. M4O offer is proving to attract new customers as 47% subscribe two SIM cards, 24% three SIM cards and 29% four SIM cards. Net additions of prepaid customers stood at 17 thousand in 3Q13, improving sequentially and versus 3Q12. This improvement was achieved on the back of the successful commercial performance of the “Moche” tariff plans, following the new positioning implemented in 2012, and also the launch of two new campaigns: (1) in 2Q13 to celebrate the first anniversary of “Moche” tariff plans targeted to under 25 years old, and (2) in 3Q13 a back to school campaign, with a strong presence in high schools and universities.

Personal operating data

In 3Q13, customer revenues in the Personal segment declined by 5.6% y.o.y to Euro 136 million, improving when compared to 2Q13 (-7.4% y.o.y), 1Q13 (-8.6% y.o.y), 4Q12 (-9.1% y.o.y) and 3Q12 (-11.2% y.o.y), despite the challenging economic background reflected on lower available income and consumption. This sequential improvement was achieved on the back of: (1) flat fee customer growth and increased weight of flat fee revenues (38.4%, +8.0pp y.o.y), and (2) increased data revenues explained by increased smartphone penetration and “internetnotelemovel” revenues. The decline in customer revenues reflected: (1) lower and volatile recharges as a result of difficult economic conditions, and (2) price competition and migration to lower tariff plans. Interconnection revenues declined by 20.6% y.o.y to Euro 9 million in 3Q13, contributing to a total decline of service revenues of -6.7% y.o.y (-10.0% y.o.y in 2Q13, -11.4% y.o.y in 1Q13, -11.9% y.o.y in 4Q12 and -13.2% y.o.y in

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3Q12). In effect, MTRs declined throughout 2012 from Euro 3.50 cents to Euro 1.27 cents as from 31 December 2012. ARPU of the personal segment stood at Euro 7.8 (-12.5% y.o.y) and customer ARPU stood at Euro 7.3 (-11.5% y.o.y). The weight of non-voice revenues in service revenues stood at 36.1% in 3Q13 (+3.1pp y.o.y), reflecting the solid performance of data packages “internetnotelemovel”.

Enterprise

The Enterprise customer segment (B2B segment) includes mobile and fixed, voice and data and convergent and integrated IT offers provided to large corporate and to small and medium size businesses. In this customer segment, PT aims at growing its revenue base beyond connectivity and legacy services by seizing the ICT opportunity, including cloud, outsourcing and BPO, on the back of cutting-edge solutions for companies and future-proof data centre investments to meet demand for high bandwidth services and virtualisation.

In 3Q13, PT launched the M3O Fibre, ADSL and Satellite offer, available to the small and medium size businesses, with pay-TV, fixed voice and mobile for the customers that do not want fixed broadband. For the M4O customers, PT has launched a new unlimited option with special conditions for the third and fourth SIM cards, coupled with the existing ones for the first and second SIM cards. In 3Q13 the competitive pressure deteriorated, leading to an even more significant price decline, more visible in mobile voice. Notwithstanding this competitive backdrop and adverse economic conditions, PT is gaining operational momentum in the small and medium size businesses segment with positive net adds across all fixed services. As a result, in 3Q13, the weight of customers that subscribe to at least 1 fixed and 1 mobile product increased by 4.9pp y.o.y, while the weight of customers that subscribe to convergent offers (4P and 5P) increased by 6.9pp y.o.y. This improved performance reflects a solid success of the M4O offer, turning PT the market leader in the small and medium size businesses segment in all services: voice (fixed and mobile), broadband (fixed and mobile) and TV.

In what concerns the corporate segment, in 3Q13, PT has developed several key initiatives to continue the business transformation in place, such as: (1) reinforcement of its IT / IS / Cloud strategy, with initial partnerships and contracts established with key customers; (2) recognition of the private servers SmartCloudPT offer with the 2013 EuroCloud Portugal award, which reinforces PT’s lead position in IT and cloud markets; (3) enhancement of M2M offer with the launch of Connectivity Managed Services, and (4) offer simplification and streamlining of sales processes of VoIP solutions / Unified Communications. In 3Q13, commercial activity continued to slow down and competitive pressure continued to be aggressive, impacting operational and financial performance.

Operating revenues of the Enterprise customer segment declined by 11.7% y.o.y to Euro 193 million in 3Q13, showing a slight sequential improvement, penalised by the economic and pricing environment, namely by: (1) the public administration strong cost cut initiatives and significant reduction in investments in new projects; (2) the large corporate cost reduction initiatives, more visible in certain sectors, such as banking and financial services and pharmacies; (3) the small and medium businesses, which were still showing some resilience in 2012, are now more penalised by the economic and financing context with higher impact on mobile revenues, and (4) intense price competition across the various segments. Notwithstanding the economic environment, PT maintained a solid leadership, both in large corporate and in small and medium size businesses, anchored on its distinctive products and services to both market segments as referred to above. In 3Q13, non-voice services represented 55.1% of Enterprise retail revenues, up by 4.0pp y.o.y.

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Enterprise operating data