Government Obligations Portfolio N-CSRS Certified semi-annual shareholder report (management investment company)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act File Number: 811-08012

Government Obligations Portfolio

(Exact Name of Registrant as Specified in Charter)

Two International Place, Boston, Massachusetts 02110

(Address of Principal Executive Offices)

Maureen A. Gemma

Two International Place, Boston, Massachusetts 02110

(Name and Address of Agent for Services)

(617) 482-8260

(Registrant’s Telephone Number)

October 31

Date of Fiscal Year End

April 30, 2015

Date of Reporting Period

Item 1. Reports to Stockholders

Government Obligations Portfolio

April 30, 2015

Portfolio of Investments (Unaudited)

Mortgage Pass-Throughs — 87.6%
Security	Principal Amount (000’s omitted)		Value
Federal Home Loan Mortgage Corp.:
2.377%, with maturity at 2036(1)	$	3,739	$	3,992,359
2.379%, with maturity at 2035(1)		2,648		2,828,844
2.387%, with maturity at 2038(1)		4,109		4,410,089
2.881%, with maturity at 2035(1)		6,168		6,569,805
2.926%, with maturity at 2034(1)		1,451		1,546,932
4.50%, with various maturities to 2035		4,530		4,845,649
5.00%, with various maturities to 2018		1,410		1,483,351
5.50%, with various maturities to 2032		2,189		2,316,894
6.00%, with various maturities to 2035		11,566		13,217,571
6.50%, with various maturities to 2036		30,283		34,845,508
6.87%, with maturity at 2024		86		97,293
7.00%, with various maturities to 2036		17,545		20,301,662
7.09%, with maturity at 2023		367		409,861
7.25%, with maturity at 2022		492		550,760
7.31%, with maturity at 2027		125		145,411
7.50%, with various maturities to 2035		15,773		18,654,408
7.63%, with maturity at 2019		114		121,738
7.75%, with maturity at 2018		8		8,298
7.78%, with maturity at 2022		72		80,328
7.85%, with maturity at 2020		91		99,576
8.00%, with various maturities to 2028		3,265		3,606,635
8.13%, with maturity at 2019		202		216,676
8.15%, with various maturities to 2021		136		149,842
8.25%, with maturity at 2017		18		18,782
8.50%, with various maturities to 2031		3,537		4,144,756
9.00%, with various maturities to 2027		1,588		1,664,515
9.25%, with maturity at 2017		7		6,823
9.50%, with various maturities to 2026		749		821,169
10.50%, with maturity at 2020		246		276,444
11.00%, with maturity at 2015		2		2,466
			$	127,434,445
Federal National Mortgage Association:
1.936%, with various maturities to 2033(1)	$	2,304	$	2,387,843
1.942%, with various maturities to 2035(1)		19,242		20,062,253
1.947%, with maturity at 2022(1)		1,043		1,066,596
1.948%, with various maturities to 2044(1)		1,919		1,999,325
2.017%, with maturity at 2022(1)		728		742,487
2.022%, with maturity at 2035(1)		1,142		1,182,004
2.058%, with maturity at 2031(1)		1,385		1,415,352
2.225%, with maturity at 2037(1)		3,803		3,935,013
2.275%, with maturity at 2040(1)		1,280		1,365,110
2.373%, with maturity at 2033(1)		9,264		9,936,730
2.399%, with maturity at 2036(1)		4,453		4,776,945

Security	Principal Amount (000’s omitted)			Value
Federal National Mortgage Association: (continued)
2.587%, with maturity at 2036(1)	$	943		$	970,088
2.931%, with maturity at 2027(1)		1,623			1,722,254
3.007%, with maturity at 2036(1)		1,016			1,048,546
3.647%, with maturity at 2034(1)		4,157			4,521,347
3.653%, with maturity at 2021(1)		663			686,193
3.715%, with maturity at 2035(1)		4,567			4,967,623
3.754%, with maturity at 2036(1)		295			312,715
3.871%, with maturity at 2036(1)		14,362			15,622,886
3.965%, with maturity at 2034(1)		3,856			4,194,218
4.143%, with maturity at 2035(1)		4,200			4,602,109
4.671%, with maturity at 2034(1)		10,337			11,287,230
5.00%, with maturity at 2027		242			269,534
5.50%, with various maturities to 2030		1,648			1,744,243
6.00%, with various maturities to 2038		13,786			15,800,698
6.437%, with maturity at 2025(2)		125			141,042
6.50%, with various maturities to 2038(3)		107,885			125,245,833
7.00%, with various maturities to 2037		56,097			65,808,314
7.50%, with various maturities to 2035		4,729			5,567,220
7.875%, with maturity at 2021		409			462,990
8.00%, with various maturities to 2034		20,082			24,180,287
8.016%, with maturity at 2030(2)		9			10,230
8.25%, with maturity at 2025		162			184,494
8.33%, with maturity at 2020		255			282,662
8.446%, with maturity at 2021(2)		38			42,630
8.50%, with various maturities to 2032		3,380			4,093,100
9.00%, with various maturities to 2030		351			401,782
9.50%, with various maturities to 2030		802			900,967
9.559%, with maturity at 2021(2)		29			31,775
9.571%, with maturity at 2020(2)		2			2,642
9.635%, with maturity at 2025(2)		14			15,791
9.75%, with maturity at 2019		8			9,339
9.795%, with maturity at 2021(2)		36			40,877
9.873%, with maturity at 2025(2)		8			9,151
9.99%, with maturity at 2023(2)		23			25,814
10.034%, with maturity at 2025(2)		2			2,515
10.106%, with maturity at 2021(2)		25			27,336
11.00%, with maturity at 2020		46			48,803
11.008%, with maturity at 2021(2)		1			1,126
11.499%, with maturity at 2019(2)		1			1,091
11.629%, with maturity at 2018(2)		0	(4)		39
				$	344,157,192
Government National Mortgage Association:
1.625%, with maturity at 2027(1)	$	207		$	213,041
2.00%, with maturity at 2026(1)		238			247,020
6.00%, with various maturities to 2033		30,346			35,307,615

17 See Notes to Financial Statements.

Government Obligations Portfolio

April 30, 2015

Portfolio of Investments (Unaudited) — continued

Security	Principal Amount (000’s omitted)		Value
Government National Mortgage Association: (continued)
6.10%, with maturity at 2033	$	7,804	$	8,911,874
6.50%, with various maturities to 2034		7,861		9,247,072
7.00%, with various maturities to 2034		19,821		22,967,896
7.50%, with various maturities to 2025		2,760		3,160,457
8.00%, with various maturities to 2027		3,984		4,562,418
8.25%, with maturity at 2019		42		45,719
8.30%, with maturity at 2020		17		18,282
8.50%, with various maturities to 2018		314		330,940
9.00%, with various maturities to 2027		3,420		4,111,106
9.50%, with various maturities to 2026		1,943		2,289,401
			$	91,412,841
Total Mortgage Pass-Throughs (identified cost $545,142,415)			$	563,004,478
Collateralized Mortgage Obligations — 7.1%
Security	Principal Amount (000’s omitted)		Value
Federal Home Loan Mortgage Corp.:
Series 30, Class I, 7.50%, 4/25/24	$	124	$	142,661
Series 1822, Class Z, 6.90%, 3/15/26		606		680,259
Series 1829, Class ZB, 6.50%, 3/15/26		249		274,501
Series 1896, Class Z, 6.00%, 9/15/26		306	��	336,294
Series 2075, Class PH, 6.50%, 8/15/28		153		172,358
Series 2091, Class ZC, 6.00%, 11/15/28		534		598,531
Series 2102, Class Z, 6.00%, 12/15/28		141		161,322
Series 2115, Class K, 6.00%, 1/15/29		1,069		1,183,586
Series 2142, Class Z, 6.50%, 4/15/29		330		383,755
Series 2245, Class A, 8.00%, 8/15/27		4,728		5,651,499
Series 4319, Class SY, 7.561%, 3/15/44(5)		2,043		2,069,367
Series 4385, Class SC, 8.915%, 9/15/44(5)		4,526		4,818,591
Series 4407, Class LN, 8.902%, 12/15/43(5)		3,263		3,579,232
			$	20,051,956
Federal National Mortgage Association:
Series G-8, Class E, 9.00%, 4/25/21	$	141	$	158,271
Series G92-44, Class ZQ, 8.00%, 7/25/22		71		74,217
Series G93-36, Class ZQ, 6.50%, 12/25/23		5,775		6,495,374
Series 1993-16, Class Z, 7.50%, 2/25/23		189		214,043
Series 1993-39, Class Z, 7.50%, 4/25/23		515		590,316
Series 1993-45, Class Z, 7.00%, 4/25/23		603		683,132
Series 1993-149, Class M, 7.00%, 8/25/23		209		234,293
Series 1993-178, Class PK, 6.50%, 9/25/23		449		497,446
Series 1993-250, Class Z, 7.00%, 12/25/23		20		20,283
Series 1994-40, Class Z, 6.50%, 3/25/24		461		511,873

Security	Principal Amount (000’s omitted)		Value
Federal National Mortgage Association: (continued)
Series 1994-42, Class K, 6.50%, 4/25/24	$	2,060	$	2,287,050
Series 1994-82, Class Z, 8.00%, 5/25/24		795		915,272
Series 1997-81, Class PD, 6.35%, 12/18/27		284		317,235
Series 2000-49, Class A, 8.00%, 3/18/27		484		565,915
Series 2001-81, Class HE, 6.50%, 1/25/32		1,046		1,226,032
Series 2002-1, Class G, 7.00%, 7/25/23		275		307,066
Series 2005-37, Class SU, 28.475%, 3/25/35(5)		1,297		1,824,919
			$	16,922,737
Government National Mortgage Association:
Series 1998-19, Class ZB, 6.50%, 7/20/28	$	306	$	355,556
Series 2011-156, Class GA, 2.00%, 12/16/41		2,048		1,920,173
Series 2014-145, Class SP, 9.032%, 10/16/44(5)		3,373		3,488,287
Series 2015-62, Class PQ, 3.00%, 3/20/42(6)		2,800		2,797,188
			$	8,561,204
Total Collateralized Mortgage Obligations (identified cost $42,843,232)			$	45,535,897
U.S. Government Agency Obligations — 1.4%
Security	Principal Amount (000’s omitted)		Value
Federal Home Loan Bank:
4.75%, 3/10/23	$	4,500	$	5,317,708
5.75%, 6/12/26		2,720		3,517,567
Total U.S. Government Agency Obligations (identified cost $7,407,232)			$	8,835,275
U.S. Treasury Obligations — 1.3%
Security	Principal Amount (000’s omitted)		Value
U.S. Treasury Bond, 7.125%, 2/15/23(3)	$	6,000	$	8,312,814
Total U.S. Treasury Obligations (identified cost $6,154,419)			$	8,312,814

18 See Notes to Financial Statements.

Government Obligations Portfolio

April 30, 2015

Portfolio of Investments (Unaudited) — continued

Short-Term Investments — 3.2%
Description	Interest (000’s omitted)		Value
Eaton Vance Cash Reserves Fund, LLC, 0.17%(7)	$	20,292	$	20,292,062
Total Short-Term Investments (identified cost $20,292,062)			$	20,292,062
Total Investments — 100.6% (identified cost $621,839,360)			$	645,980,526

Interest Rate Swaptions Written — (0.5)%
Description	Counterparty		Expiration Date		Notional Amount		Value
Option to receive 3-month USD-LIBOR-BBA Rate and pay 2.45%		Citibank, N.A.		10/15/15	$	100,000,000	$	(3,068,000	)
Total Interest Rate Swaptions Written (premium received $2,650,000)							$	(3,068,000	)
Other Assets, Less Liabilities — (0.1)%							$	(626,599	)
Net Assets — 100.0%							$	642,285,927

The percentage shown for each investment category in the Portfolio of Investments is based on net assets.

⁽¹⁾  Adjustable rate mortgage security. Rate shown is the rate at April 30, 2015.

⁽²⁾  Weighted average fixed-rate coupon that changes/updates monthly. Rate shown is the rate at April 30, 2015.

⁽³⁾  Security (or a portion thereof) has been pledged to cover collateral requirements on open derivative contracts.

⁽⁴⁾  Principal amount is less than $500.

⁽⁵⁾  Inverse floating-rate security whose coupon varies inversely with changes in the interest rate index. The stated interest rate represents the coupon rate in effect at April 30, 2015.

⁽⁶⁾  When-issued/delayed delivery security.

⁽⁷⁾  Affiliated investment company, available to Eaton Vance portfolios and funds, which invests in high quality, U.S. dollar denominated money market instruments. The rate shown is the annualized seven-day yield as of April 30, 2015.

19 See Notes to Financial Statements.

Government Obligations Portfolio

April 30, 2015

Statement of Assets and Liabilities (Unaudited)

Assets	April 30, 2015
Unaffiliated investments, at value (identified cost, $601,547,298)	$	625,688,464
Affiliated investment, at value (identified cost, $20,292,062)		20,292,062
Restricted cash*		10,080
Interest receivable		2,899,315
Interest receivable from affiliated investment		3,121
Receivable for investments sold		354,234
Receivable for variation margin on open financial futures contracts		28,595
Receivable for variation margin on open centrally cleared swap contracts		793
Receivable for open swap contracts		282,880
Total assets	$	649,559,544
Liabilities
Written swaptions outstanding, at value (premiums received, $2,650,000)	$	3,068,000
Payable for when-issued/delayed delivery securities		2,820,096
Payable for open swap contracts		580,880
Due to custodian		333,584
Payable to affiliates:
Investment adviser fee		394,709
Trustees’ fees		2,796
Accrued expenses		73,552
Total liabilities	$	7,273,617
Net Assets applicable to investors’ interest in Portfolio	$	642,285,927
Sources of Net Assets
Investors’ capital	$	620,450,700
Net unrealized appreciation		21,835,227
Total	$	642,285,927

* Represents restricted cash on deposit at the broker for open derivative contracts.

20 See Notes to Financial Statements.

Government Obligations Portfolio

April 30, 2015

Statement of Operations (Unaudited)

Investment Income	Six Months Ended April 30, 2015
Interest	$	10,298,434
Interest allocated from affiliated investment		27,355
Expenses allocated from affiliated investment		(3,133	)
Total investment income	$	10,322,656
Expenses
Investment adviser fee	$	2,448,619
Trustees’ fees and expenses		16,588
Custodian fee		100,926
Legal and accounting services		58,113
Miscellaneous		9,966
Total expenses	$	2,634,212
Deduct —
Reduction of custodian fee	$	10
Total expense reductions	$	10
Net expenses	$	2,634,202
Net investment income	$	7,688,454
Realized and Unrealized Gain (Loss)
Net realized gain (loss) —
Investment transactions	$	5,825,421
Investment transactions allocated from affiliated investment		89
Financial futures contracts		843,775
Swap contracts		(6,906	)
Net realized gain	$	6,662,379
Change in unrealized appreciation (depreciation) —
Investments	$	(3,023,664	)
Written swaptions		(1,623,900	)
Financial futures contracts		(1,487,395	)
Swap contracts		(1,847,272	)
Net change in unrealized appreciation (depreciation)	$	(7,982,231	)
Net realized and unrealized loss	$	(1,319,852	)
Net increase in net assets from operations	$	6,368,602

21 See Notes to Financial Statements.

Government Obligations Portfolio

April 30, 2015

Statements of Changes in Net Assets

Increase (Decrease) in Net Assets	Six Months Ended April 30, 2015 (Unaudited)			Year Ended October 31, 2014
From operations —
Net investment income	$	7,688,454		$	17,124,485
Net realized gain from investment transactions, written swaptions, financial futures contracts and swap contracts		6,662,379			2,430,847
Net change in unrealized appreciation (depreciation) from investments, written swaptions, financial futures contracts and swap contracts		(7,982,231	)		3,198,137
Net increase in net assets from operations	$	6,368,602		$	22,753,469
Capital transactions —
Contributions	$	11,826,786		$	23,476,340
Withdrawals		(65,311,961	)		(205,546,361	)
Net decrease in net assets from capital transactions	$	(53,485,175	)	$	(182,070,021	)
Net decrease in net assets	$	(47,116,573	)	$	(159,316,552	)
Net Assets
At beginning of period	$	689,402,500		$	848,719,052
At end of period	$	642,285,927		$	689,402,500

22 See Notes to Financial Statements.

Government Obligations Portfolio

April 30, 2015

Supplementary Data

	Six Months Ended April 30, 2015 (Unaudited)			Year Ended October 31,
Ratios/Supplemental Data				2014			2013			2012			2011			2010
Ratios (as a percentage of average daily net assets):
Expenses(1)		0.80	%(2)		0.78	%		0.75	%		0.74	%		0.75	%		0.76	%
Net investment income		2.33	%(2)		2.33	%		1.83	%		2.50	%		3.08	%		3.48	%
Portfolio Turnover		21	%(3)		4	%		8	%		26	%		19	%		22	%
Total Return		0.98	%(3)		3.13	%		(1.35	)%		2.89	%		2.21	%		5.95	%
Net assets, end of period (000’s omitted)	$	642,286		$	689,403		$	848,719		$	1,271,010		$	1,119,508		$	1,199,203

⁽¹⁾  Excludes the effect of custody fee credits, if any, of less than 0.005%.

⁽²⁾  Annualized.

⁽³⁾  Not annualized.

23 See Notes to Financial Statements.

Government Obligations Portfolio

April 30, 2015

Notes to Financial Statements (Unaudited)

1  Significant Accounting Policies

Government Obligations Portfolio (the Portfolio) is a Massachusetts business trust registered under the Investment Company Act of 1940, as amended (the 1940 Act), as a diversified, open-end management investment company. The Portfolio’s investment objective is to provide a high current return. The Portfolio invests primarily in mortgage-backed securities (MBS) issued, backed or otherwise guaranteed by the U.S. Government or its agencies or instrumentalities. The Declaration of Trust permits the Trustees to issue interests in the Portfolio. At April 30, 2015, Eaton Vance Government Obligations Fund, Eaton Vance Short Duration Government Income Fund and Eaton Vance Multi-Strategy All Market Fund held an interest of 89.7%, 9.3% and less than 0.01%, respectively, in the Portfolio.

The following is a summary of significant accounting policies of the Portfolio. The policies are in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP). The Portfolio is an investment company and follows accounting and reporting guidance in the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification Topic 946.

A  Investment Valuation — The following methodologies are used to determine the market value or fair value of investments.

Debt Obligations. Debt obligations (including short-term obligations with a remaining maturity of more than sixty days) are generally valued on the basis of valuations provided by third party pricing services, as derived from such services’ pricing models. Inputs to the models may include, but are not limited to, reported trades, executable bid and asked prices, broker/dealer quotations, prices or yields of securities with similar characteristics, interest rates, anticipated prepayments, benchmark curves or information pertaining to the issuer, as well as industry and economic events. The pricing services may use a matrix approach, which considers information regarding securities with similar characteristics to determine the valuation for a security. Short-term obligations purchased with a remaining maturity of sixty days or less are generally valued at amortized cost, which approximates market value.

Derivatives. Financial futures contracts are valued at the closing settlement price established by the board of trade or exchange on which they are traded. Swaps (other than centrally cleared) and options on interest rate swaps (“swaptions”) are normally valued using valuations provided by a third party pricing service. Such pricing service valuations are based on the present value of fixed and projected floating rate cash flows over the term of the swap contract. Future cash flows on swaps are discounted to their present value using swap rates provided by electronic data services or by broker/dealers. Alternatively, swaptions may be valued at the valuation provided by a broker/dealer (usually the counterparty to the option), so determined using similar techniques as those employed by the pricing service. Centrally cleared swaps are valued at the daily settlement price provided by the central clearing counterparty.

Affiliated Fund. The Portfolio may invest in Eaton Vance Cash Reserves Fund, LLC (Cash Reserves Fund), an affiliated investment company managed by Eaton Vance Management (EVM). The value of the Portfolio’s investment in Cash Reserves Fund reflects the Portfolio’s proportionate interest in its net assets. Cash Reserves Fund generally values its investment securities utilizing the amortized cost valuation technique in accordance with Rule 2a-7 under the 1940 Act. This technique involves initially valuing a portfolio security at its cost and thereafter assuming a constant amortization to maturity of any discount or premium. If amortized cost is determined not to approximate fair value, Cash Reserves Fund may value its investment securities in the same manner as debt obligations described above.

Fair Valuation. Investments for which valuations or market quotations are not readily available or are deemed unreliable are valued at fair value using methods determined in good faith by or at the direction of the Trustees of the Portfolio in a manner that fairly reflects the security’s value, or the amount that the Portfolio might reasonably expect to receive for the security upon its current sale in the ordinary course. Each such determination is based on a consideration of relevant factors, which are likely to vary from one pricing context to another. These factors may include, but are not limited to, the type of security, the existence of any contractual restrictions on the security���s disposition, the price and extent of public trading in similar securities of the issuer or of comparable companies or entities, quotations or relevant information obtained from broker/dealers or other market participants, information obtained from the issuer, analysts, and/or the appropriate stock exchange (for exchange-traded securities), an analysis of the company’s or entity’s financial condition, and an evaluation of the forces that influence the issuer and the market(s) in which the security is purchased and sold.

B  Investment Transactions — Investment transactions for financial statement purposes are accounted for on a trade date basis. Realized gains and losses on investments sold are determined on the basis of identified cost.

C  Income — Interest income is recorded on the basis of interest accrued, adjusted for amortization of premium or accretion of discount.

D  Federal Taxes — The Portfolio has elected to be treated as a partnership for federal tax purposes. No provision is made by the Portfolio for federal or state taxes on any taxable income of the Portfolio because each investor in the Portfolio is ultimately responsible for the payment of any taxes on its share of taxable income. Since at least one of the Portfolio’s investors is a regulated investment company that invests all or substantially all of its assets in the Portfolio, the Portfolio normally must satisfy the applicable source of income and diversification requirements (under the Internal Revenue Code) in order for its investors to satisfy them. The Portfolio will allocate, at least annually among its investors, each investor’s distributive share of the Portfolio’s net investment income, net realized capital gains and any other items of income, gain, loss, deduction or credit.

As of April 30, 2015, the Portfolio had no uncertain tax positions that would require financial statement recognition, de-recognition, or disclosure. The Portfolio files a U.S. federal income tax return annually after its fiscal year-end, which is subject to examination by the Internal Revenue Service for a period of three years from the date of filing.

24

Government Obligations Portfolio

April 30, 2015

Notes to Financial Statements (Unaudited) — continued

E  Expense Reduction — State Street Bank and Trust Company (SSBT) serves as custodian of the Portfolio. Pursuant to the custodian agreement, SSBT receives a fee reduced by credits, which are determined based on the average daily cash balance the Portfolio maintains with SSBT. All credit balances, if any, used to reduce the Portfolio’s custodian fees are reported as a reduction of expenses in the Statement of Operations.

F  Use of Estimates — The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of income and expense during the reporting period. Actual results could differ from those estimates.

G  Indemnifications — Under the Portfolio’s organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the Portfolio. Under Massachusetts law, if certain conditions prevail, interestholders in the Portfolio could be deemed to have personal liability for the obligations of the Portfolio. However, the Portfolio’s Declaration of Trust contains an express disclaimer of liability on the part of Portfolio interestholders and the By-laws provide that the Portfolio shall assume the defense on behalf of any Portfolio interestholder. Moreover, the By-laws also provide for indemnification out of Portfolio property of any interestholder held personally liable solely by reason of being or having been an interestholder for all loss or expense arising from such liability. Additionally, in the normal course of business, the Portfolio enters into agreements with service providers that may contain indemnification clauses. The Portfolio’s maximum exposure under these arrangements is unknown as this would involve future claims that may be made against the Portfolio that have not yet occurred.

H  Financial Futures Contracts — Upon entering into a financial futures contract, the Portfolio is required to deposit with the broker, either in cash or securities, an amount equal to a certain percentage of the contract amount (initial margin). Subsequent payments, known as variation margin, are made or received by the Portfolio each business day, depending on the daily fluctuations in the value of the underlying security, and are recorded as unrealized gains or losses by the Portfolio. Gains (losses) are realized upon the expiration or closing of the financial futures contracts. Should market conditions change unexpectedly, the Portfolio may not achieve the anticipated benefits of the financial futures contracts and may realize a loss. Futures contracts have minimal counterparty risk as they are exchange traded and the clearinghouse for the exchange is substituted as the counterparty, guaranteeing counterparty performance.

I  Interest Rate Swaps — Swap contracts are privately negotiated agreements between the Portfolio and a counterparty. Certain swap contracts may be centrally cleared (“centrally cleared swaps”), whereby all payments made or received by the Portfolio pursuant to the contract are with a central clearing party (CCP) rather than the original counterparty. The CCP guarantees the performance of the original parties to the contract. Upon entering into centrally cleared swaps, the Portfolio is required to deposit with the CCP, either in cash or securities, an amount of initial margin determined by the CCP, which is subject to adjustment.

Pursuant to interest rate swap agreements, the Portfolio either makes floating-rate payments to the counterparty (or CCP in the case of centrally cleared swaps) based on a benchmark interest rate in exchange for fixed-rate payments or the Portfolio makes fixed-rate payments to the counterparty (or CCP in the case of a centrally cleared swap) in exchange for payments on a floating benchmark interest rate. Payments received or made are recorded as realized gains or losses. During the term of the outstanding swap agreement, changes in the underlying value of the swap are recorded as unrealized gains or losses. For centrally cleared swaps, the daily change in valuation is recorded as a receivable or payable for variation margin and settled in cash with the CCP daily. The value of the swap is determined by changes in the relationship between two rates of interest. The Portfolio is exposed to credit loss in the event of non-performance by the swap counterparty. In the case of centrally cleared swaps, counterparty risk is minimal due to protections provided by the CCP. Risk may also arise from movements in interest rates.

J  Swaptions — A purchased swaption contract grants the Portfolio, in return for payment of the purchase price, the right, but not the obligation, to enter into a new swap agreement or to shorten, extend, cancel or otherwise modify an existing swap agreement, at some designated future time on specified terms. When the Portfolio purchases a swaption, the premium paid to the writer is recorded as an investment and subsequently marked to market to reflect the current value of the swaption. A written swaption gives the Portfolio the obligation, if exercised by the purchaser, to enter into a swap contract according to the terms of the underlying agreement. When the Portfolio writes a swaption, the premium received by the Portfolio is recorded as a liability and subsequently marked to market to reflect the current value of the swaption. When a swaption is exercised, the cost of the swap is adjusted by the amount of the premium paid or received. When a swaption expires or an unexercised swaption is closed, a gain or loss is recognized in the amount of the premium paid or received, plus the cost to close. The Portfolio’s risk for purchased swaptions is limited to the premium paid. The writer of a swaption bears the risk of unfavorable changes in the preset terms of the underlying swap contract.

K  When-Issued Securities and Delayed Delivery Transactions — The Portfolio may purchase or sell securities on a delayed delivery or when-issued basis. Payment and delivery may take place after the customary settlement period for that security. At the time the transaction is negotiated, the price of the security that will be delivered is fixed. The Portfolio maintains security positions for these commitments such that sufficient liquid assets will be available to make payments upon settlement. Securities purchased on a delayed delivery or when-issued basis are marked-to-market daily and begin earning interest on settlement date. Losses may arise due to changes in the market value of the underlying securities or if the counterparty does not perform under the contract.

L  Interim Financial Statements — The interim financial statements relating to April 30, 2015 and for the six months then ended have not been audited by an independent registered public accounting firm, but in the opinion of the Portfolio’s management, reflect all adjustments, consisting only of normal recurring adjustments, necessary for the fair presentation of the financial statements.

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Government Obligations Portfolio

April 30, 2015

Notes to Financial Statements (Unaudited) — continued

2  Investment Adviser Fee and Other Transactions with Affiliates

The investment adviser fee is earned by Boston Management and Research (BMR), a subsidiary of EVM, as compensation for investment advisory services rendered to the Portfolio. Pursuant to the investment advisory agreement and subsequent fee reduction agreement between the Portfolio and BMR, the fee is computed at an annual rate of 0.75% of the Portfolio’s average daily net assets up to $500 million, 0.6875% from $500 million up to $1 billion, 0.6250% from $1 billion up to $1.5 billion, 0.5625% from $1.5 billion up to $2 billion, 0.5000% from $2 billion up to $2.5 billion and 0.4375% of average daily net assets of $2.5 billion or more, and is payable monthly. This fee reduction cannot be terminated or reduced without the approval of a majority vote of the Trustees of the Portfolio who are not interested persons of BMR or the Portfolio and by the vote of a majority of the holders of interests in the Portfolio. For the six months ended April 30, 2015, the Portfolio’s investment adviser fee amounted to $2,448,619 or 0.74% (annualized) of the Portfolio’s average daily net assets. The Portfolio invests its cash in Cash Reserves Fund. EVM does not currently receive a fee for advisory services provided to Cash Reserves Fund.

Trustees and officers of the Portfolio who are members of EVM’s or BMR’s organizations receive remuneration for their services to the Portfolio out of the investment adviser fee. Trustees of the Portfolio who are not affiliated with the investment adviser may elect to defer receipt of all or a percentage of their annual fees in accordance with the terms of the Trustees Deferred Compensation Plan. For the six months ended April 30, 2015, no significant amounts have been deferred. Certain officers and Trustees of the Portfolio are officers of the above organizations.

3  Purchases and Sales of Investments

Purchases and sales of investments, other than short-term obligations and including maturities and paydowns, aggregated $130,523,954 and $150,593,422, respectively, for the six months ended April 30, 2015.

4  Federal Income Tax Basis of Investments

The cost and unrealized appreciation (depreciation) of investments of the Portfolio at April 30, 2015, as determined on a federal income tax basis, were as follows:

Aggregate cost	$	630,028,917
Gross unrealized appreciation	$	18,897,916
Gross unrealized depreciation		(2,946,307	)
Net unrealized appreciation	$	15,951,609

5  Financial Instruments

The Portfolio may trade in financial instruments with off-balance sheet risk in the normal course of its investing activities. These financial instruments may include financial futures contracts, written swaptions and swap contracts and may involve, to a varying degree, elements of risk in excess of the amounts recognized for financial statement purposes. The notional or contractual amounts of these instruments represent the investment the Portfolio has in particular classes of financial instruments and do not necessarily represent the amounts potentially subject to risk. The measurement of the risks associated with these instruments is meaningful only when all related and offsetting transactions are considered. A summary of written swaptions at April 30, 2015 is included in the Portfolio of Investments.

26

Government Obligations Portfolio

April 30, 2015

Notes to Financial Statements (Unaudited) — continued

A summary of obligations under these financial instruments at April 30, 2015 is as follows:

Futures Contracts
Expiration Month/Year	Contracts	Position	Aggregate Cost			Value			Net Unrealized Depreciation
6/15	340 U.S. 2-Year Treasury Note	Short	$	(74,281,371	)	$	(74,550,313	)	$	(268,941	)
6/15	410 U.S. 5-Year Treasury Note	Short		(48,850,756	)		(49,254,453	)		(403,697	)
6/15	145 U.S. 10-Year Treasury Note	Short		(18,499,395	)		(18,614,375	)		(114,981	)
6/15	240 U.S. Ultra-Long Treasury Bond	Long		40,267,901			39,480,000			(787,901	)
									$	(1,575,520	)

Centrally Cleared Interest Rate Swaps
Counterparty	Notional Amount (000’s omitted)	Portfolio Pays/Receives Floating Rate	Floating Rate Index	Annual Fixed Rate	Termination Date	Net Unrealized Depreciation
CME Group, Inc.	$1,000	Receives	3-month USD-LIBOR-BBA	1.664%	2/24/19	$	(14,419	)
						$	(14,419	)
Interest Rate Swaps
Counterparty	Notional Amount (000’s omitted)	Portfolio Pays/Receives Floating Rate	Floating Rate Index	Annual Fixed Rate	Effective Date/ Termination Date	Net Unrealized Appreciation (Depreciation)
Deutsche Bank AG	$20,000	Pays	3-month USD-LIBOR-BBA	2.61%	June 1, 2017/ June 1, 2022	$	282,880
Deutsche Bank AG	20,000	Receives	3-month USD-LIBOR-BBA	2.82	June 1, 2017/ June 1, 2047		(580,880	)
						$	(298,000	)

The effective date represents the date on which the Portfolio and the counterparty to the interest rate swap contract begin interest payment accruals.

There was no written swaptions activity for the six months ended April 30, 2015.

At April 30, 2015, the Portfolio had sufficient cash and/or securities to cover commitments under these contracts.

The Portfolio is subject to interest rate risk in the normal course of pursuing its investment objective. Because the Portfolio holds fixed-rate bonds, the value of these bonds may decrease if interest rates rise. The Portfolio utilizes various interest rate derivatives including U.S. Treasury futures, interest rate swaps and swaptions to enhance total return, to change the overall duration of the portfolio and to hedge against fluctuations in securities prices due to changes in interest rates.

The Portfolio enters into swap contracts (other than centrally cleared swaps) and over-the-counter written swaptions that may contain provisions whereby the counterparty may terminate the contract under certain conditions, including but not limited to a decline in the Portfolio’s net assets below a certain level over a certain period of time, which could trigger a payment by the Portfolio for those derivatives in a liability position. At April 30, 2015, the fair

27

Government Obligations Portfolio

April 30, 2015

Notes to Financial Statements (Unaudited) — continued

value of derivatives with credit-related contingent features in a net liability position was $3,648,880. The aggregate fair value of assets pledged as collateral by the Portfolio for such liability was $4,878,650 at April 30, 2015.

The over-the-counter (OTC) derivatives in which the Portfolio invests are subject to the risk that the counterparty to the contract fails to perform its obligations under the contract. The Portfolio is not subject to counterparty credit risk with respect to its written swaptions as the Portfolio, not the counterparty, is obligated to perform under such derivatives. To mitigate this risk, the Portfolio has entered into an International Swaps and Derivatives Association, Inc. Master Agreement (“ISDA Master Agreement”) or similar agreement with substantially all its derivative counterparties. An ISDA Master Agreement is a bilateral agreement between the Portfolio and a counterparty that governs certain OTC derivatives and typically contains, among other things, set-off provisions in the event of a default and/or termination event as defined under the relevant ISDA Master Agreement. Under an ISDA Master Agreement, the Portfolio may, under certain circumstances, offset with the counterparty certain derivative financial instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default including the bankruptcy or insolvency of the counterparty. However, bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset in bankruptcy or insolvency. Certain ISDA Master Agreements allow counterparties to OTC derivatives to terminate derivative contracts prior to maturity in the event the Portfolio’s net assets decline by a stated percentage or the Portfolio fails to meet the terms of its ISDA Master Agreements, which would cause the counterparty to accelerate payment by the Portfolio of any net liability owed to it.

The collateral requirements for derivatives traded under an ISDA Master Agreement are governed by a Credit Support Annex to the ISDA Master Agreement. Collateral requirements are determined at the close of business each day and are typically based on changes in market values for each transaction under an ISDA Master Agreement and netted into one amount for such agreement. Generally, the amount of collateral due from or to a counterparty is subject to a minimum transfer threshold amount before a transfer is required, which may vary by counterparty. Collateral pledged for the benefit of the Portfolio and/or counterparty is held in segregated accounts by the Portfolio’s custodian and cannot be sold, re-pledged, assigned or otherwise used while pledged. The portion of such collateral representing cash, if any, is reflected as restricted cash and, in the case of cash pledged by a counterparty for the benefit of the Portfolio, a corresponding liability on the Statement of Assets and Liabilities. Securities pledged by the Portfolio as collateral, if any, are identified as such in the Portfolio of Investments.

The fair value of open derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) and whose primary underlying risk exposure is interest rate risk at April 30, 2015 was as follows:

	Fair Value
Derivative	Asset Derivative			Liability Derivative
Written swaptions	$	—		$	(3,068,000	)(1)
Futures contracts		—			(1,575,520	)(2)
Swap contracts		282,880	(3)		(580,880	)(4)
Swap contracts (centrally cleared)		—			(14,419	)(5)
Total	$	282,880		$	(5,238,819	)
Derivatives not subject to master netting or similar agreements	$	—		$	(1,589,939	)
Total Derivatives subject to master netting or similar agreements	$	282,880		$	(3,648,880	)

⁽¹⁾  Statement of Assets and Liabilities location: Written swaptions outstanding, at value.

⁽²⁾  Amount represents cumulative unrealized depreciation on futures contracts in the Futures Contracts table above. Only the current day’s variation margin on open futures contracts is reported within the Statement of Assets and Liabilities as Receivable or Payable for variation margin, as applicable.

⁽³⁾  Statement of Assets and Liabilities location: Receivable for open swap contracts; Net unrealized appreciation.

⁽⁴⁾  Statement of Assets and Liabilities location: Payable for open swap contracts; Net unrealized appreciation.

⁽⁵⁾  Amount represents cumulative unrealized depreciation on centrally cleared swap contracts in the Swap Contracts table above. Only the current day’s variation margin on centrally cleared swap contracts is reported within the Statement of Assets and Liabilities as Receivable for variation margin on open centrally cleared swap contracts.

28

Government Obligations Portfolio

April 30, 2015

Notes to Financial Statements (Unaudited) — continued

The Portfolio’s derivative assets and liabilities at fair value by type, which are reported gross in the Statement of Assets and Liabilities, are presented in the table above. The following tables present the Portfolio’s derivative assets and liabilities by counterparty, net of amounts available for offset under a master netting agreement and net of the related collateral received by the Portfolio for assets and pledged by the Portfolio for liabilities as of April 30, 2015.

Counterparty	Derivative Assets Subject to Master Netting Agreement			Derivatives Available for Offset			Non-cash Collateral Received(a)		Cash Collateral Received(a)		Net Amount of Derivative Assets(b)
Deutsche Bank AG	$	282,880		$	(282,880	)	$	—	$	—	$	—
Counterparty	Derivative Liabilities Subject to Master Netting Agreement			Derivatives Available for Offset			Non-cash Collateral Pledged(a)		Cash Collateral Pledged(a)		Net Amount of Derivative Liabilities(c)
Citibank, N.A.	$	(3,068,000	)	$	—		$	3,068,000	$	—	$	—
Deutsche Bank AG		(580,880	)		282,880			298,000		—		—
	$	(3,648,880	)	$	282,880		$	3,366,000	$	—	$	—

^(a)  In some instances, the actual collateral received and/or pledged may be more than the amount shown due to overcollateralization.

^(b)  Net amount represents the net amount due from the counterparty in the event of default.

^(c)  Net amount represents the net amount payable to the counterparty in the event of default.

The effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) on the Statement of Operations and whose primary underlying risk exposure is interest rate risk for the six months ended April 30, 2015 was as follows:

Derivative	Realized Gain (Loss) on Derivatives Recognized in Income(1)			Change in Unrealized Appreciation (Depreciation) on Derivatives Recognized in Income(2)
Written swaptions	$	—		$	(1,623,900	)
Futures contracts	$	843,775		$	(1,487,395	)
Swap contracts	$	(6,906	)	$	(1,847,272	)

⁽¹⁾  Statement of Operations location: Net realized gain (loss) – Financial futures contracts and Swap contracts, respectively.

⁽²⁾  Statement of Operations location: Change in unrealized appreciation (depreciation) – Written swaptions, Financial futures contracts and Swap contracts, respectively.

The average notional amounts of derivative contracts outstanding during the six months ended April 30, 2015, which are indicative of the volume of these derivative types, were as follows:

Futures Contracts — Long		Futures Contracts — Short		Swap Contracts
	$30,094,000	$	106,446,000	$	41,000,000

6  Line of Credit

The Portfolio participates with other portfolios and funds managed by EVM and its affiliates in a $750 million unsecured line of credit agreement with a group of banks, which is in effect through September 7, 2015. Borrowings are made by the Portfolio solely to facilitate the handling of unusual and/or unanticipated short-term cash requirements. Interest is charged to the Portfolio based on its borrowings at an amount above either the Eurodollar rate or Federal Funds rate. In addition, a fee computed at an annual rate of 0.08% on the daily unused portion of the line of credit is allocated among the participating portfolios and funds at the end of each quarter. Because the line of credit is not available exclusively to the Portfolio, it may be unable to

29

Government Obligations Portfolio

April 30, 2015

Notes to Financial Statements (Unaudited) — continued

borrow some or all of its requested amounts at any particular time. The Portfolio did not have any significant borrowings or allocated fees during the six months ended April 30, 2015.

7  Overdraft Advances

Pursuant to the custodian agreement, SSBT may, in its discretion, advance funds to the Portfolio to make properly authorized payments. When such payments result in an overdraft, the Portfolio is obligated to repay SSBT at the current rate of interest charged by SSBT for secured loans (currently, the Federal Funds rate plus 2%). This obligation is payable on demand to SSBT. SSBT has a lien on the Portfolio’s assets to the extent of any overdraft. At April 30, 2015, the Portfolio had an overdraft balance due to SSBT pursuant to the foregoing arrangement of $333,584. Based on the short-term nature of these payments and the variable interest rate, the carrying value of the overdraft advances approximated its fair value at April 30, 2015. If measured at fair value, overdraft advances would have been considered as Level 2 in the fair value hierarchy (see Note 8) at April 30, 2015. The Portfolio’s average overdraft advances during the six months ended April 30, 2015 were not significant.

8  Fair Value Measurements

Under generally accepted accounting principles for fair value measurements, a three-tier hierarchy to prioritize the assumptions, referred to as inputs, is used in valuation techniques to measure fair value. The three-tier hierarchy of inputs is summarized in the three broad levels listed below.

Ÿ Level 1 – quoted prices in active markets for identical investments

Ÿ Level 2 – other significant observable inputs (including quoted prices for similar investments, interest rates, prepayment speeds, credit risk, etc.)

Ÿ Level 3 – significant unobservable inputs (including a fund’s own assumptions in determining the fair value of investments)

In cases where the inputs used to measure fair value fall in different levels of the fair value hierarchy, the level disclosed is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

At April 30, 2015, the hierarchy of inputs used in valuing the Portfolio’s investments and open derivative instruments, which are carried at value, were as follows:

Asset Description	Level 1			Level 2			Level 3		Total
Mortgage Pass-Throughs	$	—		$	563,004,478		$	—	$	563,004,478
Collateralized Mortgage Obligations		—			45,535,897			—		45,535,897
U.S. Government Agency Obligations		—			8,835,275			—		8,835,275
U.S. Treasury Obligations		—			8,312,814			—		8,312,814
Short-Term Investments		—			20,292,062			—		20,292,062
Total Investments	$	—		$	645,980,526		$	—	$	645,980,526
Swap Contracts	$	—		$	282,880		$	—	$	282,880
Total	$	—		$	646,263,406		$	—	$	646,263,406
Liability Description
Interest Rate Swaptions Written	$	—		$	(3,068,000	)	$	—	$	(3,068,000	)
Futures Contracts		(1,575,520	)		—			—		(1,575,520	)
Swap Contracts		—			(595,299	)		—		(595,299	)
Total	$	(1,575,520	)	$	(3,663,299	)	$	—	$	(5,238,819	)

The Portfolio held no investments or other financial instruments as of October 31, 2014 whose fair value was determined using Level 3 inputs. At April 30, 2015, there were no investments transferred between Level 1 and Level 2 during the six months then ended.

30

Eaton Vance

Government Obligations Fund

April 30, 2015

Board of Trustees’ Contract Approval

Overview of the Contract Review Process

The Investment Company Act of 1940, as amended (the “1940 Act”), provides, in substance, that each investment advisory agreement between a fund and its investment adviser will continue in effect from year to year only if its continuation is approved at least annually by the fund’s board of trustees, including by a vote of a majority of the trustees who are not “interested persons” of the fund (“Independent Trustees”), cast in person at a meeting called for the purpose of considering such approval.

At a meeting of the Boards of Trustees (each a “Board”) of the registered investment companies advised, administered and/or distributed by Eaton Vance Management or its affiliates (the “Eaton Vance Funds”) held on April 27, 2015, the Board, including a majority of the Independent Trustees, voted to approve continuation of existing investment advisory and sub-advisory agreements for the Eaton Vance Funds for an additional one-year period. In voting its approval, the Board relied upon the affirmative recommendation of its Contract Review Committee, which is a committee comprised exclusively of Independent Trustees. Prior to making its recommendation, the Contract Review Committee reviewed information furnished by each adviser to the Eaton Vance Funds (including information specifically requested by the Board) for a series of meetings of the Contract Review Committee held between February and April 2015. The Contract Review Committee also considered information received at prior meetings of the Board and its committees, as relevant to its annual evaluation of the investment advisory and sub-advisory agreements.

The information that the Board considered included, among other things, the following:

Information about Fees, Performance and Expenses

Ÿ A report from an independent data provider comparing the advisory and related fees paid by each fund with fees paid by comparable funds as identified by the data provider (“comparable funds”);

Ÿ A report from an independent data provider comparing each fund’s total expense ratio and its components to comparable funds;

Ÿ A report from an independent data provider comparing the investment performance of each fund (including, where relevant, yield data, Sharpe ratios and information ratios) to the investment performance of comparable funds over various time periods;

Ÿ Data regarding investment performance in comparison to benchmark indices and customized peer groups identified by the adviser in consultation with the Board;

Ÿ For each fund, comparative information concerning the fees charged and the services provided by each adviser in managing other accounts (including mutual funds, other collective investment funds and institutional accounts) using investment strategies and techniques similar to those used in managing such fund;

Ÿ Profitability analyses for each adviser with respect to each fund;

Information about Portfolio Management and Trading

Ÿ Descriptions of the investment management services provided to each fund, including the investment strategies and processes it employs;

Ÿ The procedures and processes used to determine the fair value of fund assets and actions taken to monitor and test the effectiveness of such procedures and processes;

Ÿ Information about each adviser’s policies and practices with respect to trading, including each adviser’s processes for monitoring best execution of portfolio transactions;

Ÿ Information about the allocation of brokerage transactions and the benefits received by each adviser as a result of brokerage allocation, including information concerning the acquisition of research through client commission arrangements and policies with respect to “soft dollars”;

Ÿ Data relating to portfolio turnover rates of each fund;

Information about each Adviser

Ÿ Reports detailing the financial results and condition of each adviser;

Ÿ Descriptions of the qualifications, education and experience of the individual investment professionals whose responsibilities include portfolio management and investment research for the funds, and information relating to their compensation and responsibilities with respect to managing other mutual funds and investment accounts;

Ÿ The Code of Ethics of each adviser and its affiliates, together with information relating to compliance with and the administration of such codes;

Ÿ Policies and procedures relating to proxy voting and the handling of corporate actions and class actions;

Ÿ Information concerning the resources devoted to compliance efforts undertaken by each adviser and its affiliates (including descriptions of various compliance programs) and their record of compliance;

Ÿ Descriptions of the business continuity and disaster recovery plans of each adviser and its affiliates;

Ÿ A description of Eaton Vance Management’s procedures for overseeing third party advisers and sub-advisers, including with respect to regulatory and compliance issues, investment management and other matters;

31

Eaton Vance

Government Obligations Fund

April 30, 2015

Board of Trustees’ Contract Approval — continued

Other Relevant Information

Ÿ Information concerning the nature, cost and character of the administrative and other non-investment management services provided by Eaton Vance Management and its affiliates;

Ÿ Information concerning management of the relationship with the custodian, subcustodians and fund accountants by each adviser or the funds’ administrator; and

Ÿ The terms of each investment advisory agreement.

Over the course of the twelve-month period ended April 30, 2015, with respect to one or more funds, the Board met nine times and the Contract Review Committee, the Audit Committee, the Governance Committee, the Portfolio Management Committee and the Compliance Reports and Regulatory Matters Committee, each of which is a Committee comprised solely of Independent Trustees, met eight, seventeen, seven, eleven and thirteen times, respectively. At such meetings, the Trustees participated in investment and performance reviews with the portfolio managers and other investment professionals of each adviser relating to each fund, and considered the investment and trading strategies used in pursuing each fund’s investment objective, including, where relevant, the use of derivative instruments, as well as processes for monitoring best execution of portfolio transactions and risk management techniques. The Board and its Committees also evaluated issues pertaining to industry and regulatory developments, compliance procedures, fund governance and other issues with respect to the funds, and received and participated in reports and presentations provided by Eaton Vance Management and other fund advisers with respect to such matters. In addition to the formal meetings of the Board and its Committees, the Independent Trustees hold regular teleconferences in between meetings to discuss, among other topics, matters relating to the continuation of investment advisory and sub-advisory agreements.

For funds that invest through one or more underlying portfolios, the Board considered similar information about the portfolio(s) when considering the approval of investment advisory agreements. In addition, in cases where the fund’s investment adviser has engaged a sub-adviser, the Board considered similar information about the sub-adviser when considering the approval of any sub-advisory agreement.

The Contract Review Committee was assisted throughout the contract review process by Goodwin Procter LLP, legal counsel for the Independent Trustees. The members of the Contract Review Committee relied upon the advice of such counsel and their own business judgment in determining the material factors to be considered in evaluating each investment advisory and sub-advisory agreement and the weight to be given to each such factor. The conclusions reached with respect to each investment advisory and sub-advisory agreement were based on a comprehensive evaluation of all the information provided and not any single factor. Moreover, each member of the Contract Review Committee may have placed varying emphasis on particular factors in reaching conclusions with respect to each investment advisory and sub-advisory agreement. In evaluating each investment advisory and sub-advisory agreement, including the specific fee structures and other terms of the agreements, the Contract Review Committee was informed by multiple years of analysis and discussion among the Independent Trustees and the Eaton Vance Funds’ advisers and sub-advisers.

Results of the Process

Based on its consideration of the foregoing, and such other information as it deemed relevant, including the factors and conclusions described below, the Contract Review Committee concluded that the continuation of the investment advisory agreement of Government Obligations Portfolio (the “Portfolio”), a portfolio in which Eaton Vance Government Obligations Fund (the “Fund”) invests, with Boston Management and Research (the “Adviser”), an affiliate of Eaton Vance Management, including its fee structure, is in the interests of shareholders and, therefore, the Contract Review Committee recommended to the Board approval of the agreement. The Board accepted the recommendation of the Contract Review Committee as well as the factors considered and conclusions reached by the Contract Review Committee with respect to the agreement. Accordingly, the Board, including a majority of the Independent Trustees, voted to approve continuation of the investment advisory agreement for the Portfolio.

Nature, Extent and Quality of Services

In considering whether to approve the investment advisory agreement of the Portfolio, the Board evaluated the nature, extent and quality of services provided to the Portfolio by the Adviser.

The Board considered the Adviser’s management capabilities and investment process with respect to the types of investments held by the Portfolio, including the education, experience and number of its investment professionals and other personnel who provide portfolio management, investment research, and similar services to the Portfolio, including recent changes to such personnel. The Board specifically noted the Adviser’s experience in investing in mortgage-backed securities, including seasoned mortgage-backed securities. The Board also took into account the resources dedicated to portfolio management and other services, as well as the compensation methods of the Adviser and other factors, such as the reputation and resources of the Adviser to recruit and retain investment personnel. In addition, the Board considered the time and attention devoted to the Portfolio by senior management, as well as the infrastructure, operational capabilities and support staff in place to assist in the management of the Portfolio, including the provision of administrative services.

The Board considered the compliance programs of the Adviser and relevant affiliates thereof. Among other matters, the Board considered compliance and reporting matters relating to personal trading by investment personnel, selective disclosure of portfolio holdings, late trading, frequent trading, portfolio valuation, business continuity and the allocation of investment opportunities. The Board also considered the responses of the Adviser and its affiliates to requests in recent years from regulatory authorities such as the Securities and Exchange Commission and the Financial Industry Regulatory Authority.

32

Eaton Vance

Government Obligations Fund

April 30, 2015

Board of Trustees’ Contract Approval — continued

The Board considered shareholder and other administrative services provided or managed by Eaton Vance Management and its affiliates, including transfer agency and accounting services. The Board evaluated the benefits to shareholders of investing in a fund that is a part of a large family of funds, including the ability, in many cases, to exchange an investment among different funds without incurring additional sales charges.

After consideration of the foregoing factors, among others, the Board concluded that the nature, extent and quality of services provided by the Adviser, taken as a whole, are appropriate and consistent with the terms of the investment advisory agreement.

Fund Performance

The Board compared the Fund’s investment performance to that of comparable funds and appropriate benchmark indices, as well as a customized peer group of similarly managed funds. The Board’s review included comparative performance data for the one-, three-, five- and ten-year periods ended September 30, 2014 for the Fund. The Board concluded that the performance of the Fund was satisfactory.

Management Fees and Expenses

The Board considered contractual fee rates payable by the Portfolio and by the Fund for advisory and administrative services (referred to collectively as “management fees”). As part of its review, the Board considered the Fund’s management fees and total expense ratio for the year ended September 30, 2014, as compared to those of comparable funds, before and after giving effect to any undertaking to waive fees or reimburse expenses. The Board considered certain Fund specific factors that had an impact on Fund expense ratios relative to comparable funds, as identified by management in response to inquiries from the Contract Review Committee. The Board also considered actions taken by management in recent years to reduce expenses at the fund complex level.

After considering the foregoing information, and in light of the nature, extent and quality of the services provided by the Adviser, the Board concluded that the management fees charged for advisory and related services are reasonable.

Profitability

The Board considered the level of profits realized by the Adviser and relevant affiliates thereof in providing investment advisory and administrative services to the Fund, to the Portfolio and to all Eaton Vance Funds as a group. The Board considered the level of profits realized without regard to revenue sharing or other payments by the Adviser and its affiliates to third parties in respect of distribution services. The Board also considered other direct or indirect benefits received by the Adviser and its affiliates in connection with their relationships with the Fund and the Portfolio, including the benefits of research services that may be available to the Adviser as a result of securities transactions effected for the Portfolio and other investment advisory clients.

The Board concluded that, in light of the foregoing factors and the nature, extent and quality of the services rendered, the profits realized by the Adviser and its affiliates are reasonable.

Economies of Scale

In reviewing management fees and profitability, the Board also considered the extent to which the Adviser and its affiliates, on the one hand, and the Fund and the Portfolio, on the other hand, can expect to realize benefits from economies of scale as the assets of the Fund and the Portfolio increase. The Board acknowledged the difficulty in accurately measuring the benefits resulting from the economies of scale with respect to the management of any specific fund or group of funds. The Board reviewed data summarizing the increases and decreases in the assets of the Fund and of all Eaton Vance Funds as a group over various time periods, and evaluated the extent to which the total expense ratio of the Fund and the profitability of the Adviser and its affiliates may have been affected by such increases or decreases. Based upon the foregoing, the Board concluded that the Fund currently shares in the benefits from economies of scale. The Board also concluded that, assuming reasonably foreseeable increases in the assets of the Fund and the Portfolio, the structure of the advisory fees, which include breakpoints at several asset levels, will allow the Fund and the Portfolio to continue to benefit from economies of scale in the future.

33

Eaton Vance

Government Obligations Fund

April 30, 2015

Officers and Trustees

Officers of Eaton Vance Government Obligations Fund

Payson F. Swaffield

President

Maureen A. Gemma

Vice President, Secretary and

Chief Legal Officer

James F. Kirchner

Treasurer

Paul M. O’Neil

Chief Compliance Officer

Officers of Government Obligations Portfolio

Susan Schiff

President

Payson F. Swaffield

Vice President

Maureen A. Gemma

Vice President, Secretary and

Chief Legal Officer

James F. Kirchner

Treasurer

Paul M. O’Neil

Chief Compliance Officer

Trustees of Eaton Vance Government Obligations Fund and Government Obligations Portfolio

Ralph F. Verni

Chairman

Scott E. Eston

Thomas E. Faust Jr.*

Cynthia E. Frost

George J. Gorman

Valerie A. Mosley

William H. Park

Ronald A. Pearlman

Helen Frame Peters

Susan J. Sutherland**

Harriett Tee Taggart

* Interested Trustee

** Ms. Sutherland began serving as a Trustee effective May 1, 2015.

34

Eaton Vance Funds

IMPORTANT NOTICES

Privacy.  The Eaton Vance organization is committed to ensuring your financial privacy. Each of the financial institutions identified below has in effect the following policy (“Privacy Policy”) with respect to nonpublic personal information about its customers:

Ÿ Only such information received from you, through application forms or otherwise, and information about your Eaton Vance fund transactions will be collected. This may include information such as name, address, social security number, tax status, account balances and transactions.

Ÿ None of such information about you (or former customers) will be disclosed to anyone, except as permitted by law (which includes disclosure to employees necessary to service your account). In the normal course of servicing a customer’s account, Eaton Vance may share information with unaffiliated third parties that perform various required services such as transfer agents, custodians and broker-dealers.

Ÿ Policies and procedures (including physical, electronic and procedural safeguards) are in place that are designed to protect the confidentiality of such information.

Ÿ We reserve the right to change our Privacy Policy at any time upon proper notification to you. Customers may want to review our Privacy Policy periodically for changes by accessing the link on our homepage: www.eatonvance.com.

Our pledge of privacy applies to the following entities within the Eaton Vance organization: the Eaton Vance Family of Funds, Eaton Vance Management, Eaton Vance Investment Counsel, Eaton Vance Distributors, Inc., Eaton Vance Trust Company, Eaton Vance Management’s Real Estate Investment Group and Boston Management and Research. In addition, our Privacy Policy applies only to those Eaton Vance customers who are individuals and who have a direct relationship with us. If a customer’s account (i.e., fund shares) is held in the name of a third-party financial advisor/broker-dealer, it is likely that only such advisor’s privacy policies apply to the customer. This notice supersedes all previously issued privacy disclosures. For more information about Eaton Vance’s Privacy Policy, please call 1-800-262-1122.

Delivery of Shareholder Documents.  The Securities and Exchange Commission (SEC) permits funds to deliver only one copy of shareholder documents, including prospectuses, proxy statements and shareholder reports, to fund investors with multiple accounts at the same residential or post office box address. This practice is often called “householding” and it helps eliminate duplicate mailings to shareholders. Eaton Vance, or your financial advisor, may household the mailing of your documents indefinitely unless you instruct Eaton Vance, or your financial advisor, otherwise. If you would prefer that your Eaton Vance documents not be householded, please contact Eaton Vance at 1-800-262-1122, or contact your financial advisor. Your instructions that householding not apply to delivery of your Eaton Vance documents will be effective within 30 days of receipt by Eaton Vance or your financial advisor.

Portfolio Holdings.  Each Eaton Vance Fund and its underlying Portfolio(s) (if applicable) will file a schedule of portfolio holdings on Form N-Q with the SEC for the first and third quarters of each fiscal year. The Form N-Q will be available on the Eaton Vance website at www.eatonvance.com, by calling Eaton Vance at 1-800-262-1122 or in the EDGAR database on the SEC’s website at www.sec.gov. Form N-Q may also be reviewed and copied at the SEC’s public reference room in Washington, D.C. (call 1-800-732-0330 for information on the operation of the public reference room).

Proxy Voting.  From time to time, funds are required to vote proxies related to the securities held by the funds. The Eaton Vance Funds or their underlying Portfolios (if applicable) vote proxies according to a set of policies and procedures approved by the Funds’ and Portfolios’ Boards. You may obtain a description of these policies and procedures and information on how the Funds or Portfolios voted proxies relating to portfolio securities during the most recent 12-month period ended June 30, without charge, upon request, by calling 1-800-262-1122 and by accessing the SEC’s website at www.sec.gov.

35

This Page Intentionally Left Blank

Investment Adviser of Government Obligations Portfolio

Boston Management and Research

Two International Place

Boston, MA 02110

Administrator of Eaton Vance Government Obligations Fund

Eaton Vance Management

Two International Place

Boston, MA 02110

Principal Underwriter*

Eaton Vance Distributors, Inc.

Two International Place

Boston, MA 02110

(617) 482-8260

Custodian

State Street Bank and Trust Company

State Street Financial Center, One Lincoln Street

Boston, MA 02111

Transfer Agent

BNY Mellon Investment Servicing (US) Inc.

Attn: Eaton Vance Funds

P.O. Box 9653

Providence, RI 02940-9653

(800) 262-1122

Fund Offices

Two International Place

Boston, MA 02110

* FINRA BrokerCheck.  Investors may check the background of their Investment Professional by contacting the Financial Industry Regulatory Authority (FINRA). FINRA BrokerCheck is a free tool to help investors check the professional background of current and former FINRA-registered securities firms and brokers. FINRA BrokerCheck is available by calling 1-800-289-9999 and at www.FINRA.org. The FINRA BrokerCheck brochure describing this program is available to investors at www.FINRA.org.

7692    4.30.15

Item 2. Code of Ethics

Not required in this filing.

Item 3. Audit Committee Financial Expert

Not required in this filing.

Item 4. Principal Accountant Fees and Services

Not required in this filing.

Item 5. Audit Committee of Listed Registrants

Not applicable.

Item 6. Schedule of Investments

Please see schedule of investments contained in the Report to Stockholders included under Item 1 of this Form N-CSR.

Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies

Not applicable.

Item 8. Portfolio Managers of Closed-End Management Investment Companies

Not applicable.

Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers

Not applicable.

Item 10. Submission of Matters to a Vote of Security Holders

No material changes.

Item 11. Controls and Procedures

(a) It is the conclusion of the registrant’s principal executive officer and principal financial officer that the effectiveness of the registrant’s current disclosure controls and procedures (such disclosure controls and procedures having been evaluated within 90 days of the date of this filing) provide reasonable assurance that the information required to be disclosed by the registrant has been recorded, processed, summarized and reported within the time period specified in the Commission’s rules and forms and that the information required to be disclosed by the registrant has been accumulated and communicated to the registrant’s principal executive officer and principal financial officer in order to allow timely decisions regarding required disclosure.

(b) There have been no changes in the registrant’s internal controls over financial reporting during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 12. Exhibits

(a)(1)	Registrant’s Code of Ethics – Not applicable (please see Item 2).
(a)(2)(i)	Treasurer’s Section 302 certification.
(a)(2)(ii)	President’s Section 302 certification.
(b)	Combined Section 906 certification.

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Government Obligations Portfolio

By:	/s/ Susan Schiff
	Susan Schiff
	President
Date:	June 10, 2015

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:	/s/ James F. Kirchner
	James F. Kirchner
	Treasurer
Date:	June 10, 2015
By:	/s/ Susan Schiff
	Susan Schiff
	President
Date:	June 10, 2015