Pioneer U.S. Government Money Market Fund * Portfolio Holdings as of 9/30/2019

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September 30, 2019 Page 1 of 8

Pioneer U.S. Government Money Market Fund

*

Portfolio Holdings as of 9/30/2019

Weighted Average Maturity (In Days):1 ₁₂ _{SEC Filings(EDGAR Online)}

Weighted Average Life Maturity (In Days):2 ₁₁₂ _{http://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=PMTXX}

CUSIP® Issuer Coupon

Effective Maturity Date (used to calculate WAM)3 Effective Maturity Date (used to calculate WAL)4 Principal

Amount Value Investment Category

BANK OF NOVA SCOTIA 2.3500 10/1/2019 10/1/2019 $15,630,000 $15,630,000

U.S. Government Agency Repurchase Agreement, collateralized only by U.S. Government Agency securities, U.S. Treasuries, and cash

3133EKWR3 FEDERAL FARM CREDIT BANKS 2.0535 10/30/2019 7/30/2020 3,620,000 3,617,613 U.S. Government Agency Debt

3133EJ6Q7 FEDERAL FARM CREDIT BANKS 1.9592 10/1/2019 1/30/2020 2,000,000 1,999,794 U.S. Government Agency Debt

3133EHZK2 FEDERAL FARM CREDIT BANKS 2.0184 10/25/2019 9/25/2020 3,005,000 3,002,393 U.S. Government Agency Debt

3133EHVR1 FEDERAL FARM CREDIT BANKS 2.0465 10/24/2019 8/24/2020 485,000 484,681 U.S. Government Agency Debt

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3133EHR21 FEDERAL FARM CREDIT BANKS 1.9559 10/13/2019 11/13/2019 520,000 520,031 U.S. Government Agency Debt

CUSIP®

(continued) Issuer (continued) (continued)Coupon

Effective Maturity Date (used to calculate WAM)3 (continued) Effective Maturity Date (used to calculate WAL)4 (continued) Principal Amount (continued) Value

(continued) Investment Category (continued)

3133EHNT6 FEDERAL FARM CREDIT BANKS 2.0570 10/19/2019 6/19/2020 $3,000,000 $2,998,422 U.S. Government Agency Debt

3133EG6Y6 FEDERAL FARM CREDIT BANKS 2.0990 10/10/2019 2/10/2020 3,725,000 3,724,961 U.S. Government Agency Debt

3133EHAE3 FEDERAL FARM CREDIT BANKS 2.0959 10/21/2019 2/21/2020 1,550,000 1,550,255 U.S. Government Agency Debt

3133EHKY8 FEDERAL FARM CREDITS BANKS 2.0459 10/26/2019 5/26/2020 1,310,000 1,309,407 U.S. Government Agency Debt

313384MV8 FEDERAL HOME LOAN BANK DISCOUNT NOTES 2.0127 10/11/2019 10/11/2019 900,000 899,530 U.S. Government Agency Debt

313384NA3 FEDERAL HOME LOAN BANK DISCOUNT NOTES 2.0133 10/16/2019 10/16/2019 1,000,000 999,217 U.S. Government Agency Debt

313384NB1 FEDERAL HOME LOAN BANK DISCOUNT NOTES 1.9927 10/17/2019 10/17/2019 2,800,000 2,797,660 U.S. Government Agency Debt

313384NC9 FEDERAL HOME LOAN BANK DISCOUNT NOTES 2.0424 10/18/2019 10/18/2019 2,745,000 2,742,563 U.S. Government Agency Debt

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313384NH8 FEDERAL HOME LOAN BANK DISCOUNT NOTES 2.1245 10/23/2019 10/23/2019 2,600,000 2,597,013 U.S. Government Agency Debt

3130A9FR7 FEDERAL HOME LOAN BANKS 2.1940 10/28/2019 9/28/2020 1,115,000 1,116,462 U.S. Government Agency Debt

3130AGXS9 FEDERAL HOME LOAN BANKS 1.8400 10/1/2019 5/22/2020 2,000,000 1,999,440 U.S. Government Agency Debt

CUSIP®

3130AGPJ8 FEDERAL HOME LOAN BANKS 1.8650 10/1/2019 9/28/2020 $2,000,000 $1,999,422 U.S. Government Agency Debt

3130AGKE4 FEDERAL HOME LOAN BANKS 1.8600 10/1/2019 8/25/2020 910,000 909,751 U.S. Government Agency Debt

3130AG5G6 FEDERAL HOME LOAN BANKS 1.8850 10/1/2019 3/27/2020 800,000 800,038 U.S. Government Agency Debt

3130AETH3 FEDERAL HOME LOAN BANKS 1.9840 10/20/2019 2/20/2020 1,000,000 999,726 U.S. Government Agency Debt

3130ADEY4 FEDERAL HOME LOAN BANKS 1.9810 10/23/2019 1/23/2020 400,000 399,907 U.S. Government Agency Debt

3130AD3X8 FEDERAL HOME LOAN BANKS 1.9730 10/16/2019 12/16/2019 600,000 599,944 U.S. Government Agency Debt

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3130AGYH2 FEDERAL HOME LOAN BANKS 1.8350 10/1/2019 11/27/2019 5,000,000 4,999,750 U.S. Government Agency Debt

3134GT5F6 FEDERAL HOME LOAN MORTGAGE CORP. 1.8500 10/1/2019 6/2/2020 1,700,000 1,700,106 U.S. Government Agency Debt

3135G0U68 FEDERAL NATIONAL MORTGAGE ASSOCIATION 1.8900 10/1/2019 10/30/2019 325,000 325,024 U.S. Government Agency Debt

3135G0U76 FEDERAL NATIONAL MORTGAGE ASSOCIATION 1.9200 10/1/2019 4/30/2020 1,000,000 1,000,550 U.S. Government Agency Debt

CUSIP®

3135G0V83 FEDERAL NATIONAL MORTGAGE ASSOCIATION 1.8600 10/1/2019 1/29/2021 $300,000 $300,106 U.S. Government Agency Debt

3136G4TH6 FEDERAL NATIONAL MORTGAGE ASSOCIATION 1.9800 10/1/2019 1/30/2020 6,960,000 6,963,782 U.S. Government Agency Debt

MERRILL LYNCH, PIERCE,

FENNER & SMITH INC. 2.3200 10/1/2019 10/1/2019 15,630,000 15,630,000

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RBC DOMINION 2.3300 10/1/2019 10/1/2019 15,200,000 15,200,000

TD SECURITIES 2.3000 10/1/2019 10/1/2019 7,400,000 7,400,000

U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash

TD SECURITIES 2.3500 10/1/2019 10/1/2019 7,400,000 7,400,000

U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash

912796WA3 UNITED STATES TREASURY BILL 1.9335 10/22/2019 10/22/2019 25,000,000 24,973,841 U.S. Treasury Debt

CUSIP®

912796VY2 UNITED STATES TREASURY BILL 2.0131 10/8/2019 10/8/2019 $6,500,000 $6,497,788 U.S. Treasury Debt

912796SY6 UNITED STATES TREASURY BILL 1.8461 12/26/2019 12/26/2019 1,220,000 1,214,798 U.S. Treasury Debt

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912796VZ9 UNITED STATES TREASURY BILL 2.0081 10/15/2019 10/15/2019 25,000,000 24,983,521 U.S. Treasury Debt

9128287G9 UNITED STATES TREASURY FLOATING RATE NOTE 2.1342 10/1/2019 7/31/2021 3,285,000 3,282,723 U.S. Treasury Debt

9128283Y4 UNITED STATES TREASURY NOTE 2.2500 2/29/2020 2/29/2020 5,390,000 5,397,790 U.S. Treasury Debt

9128284K3 UNITED STATES TREASURY NOTE 1.9472 10/1/2019 4/30/2020 9,170,000 9,164,236 U.S. Treasury Debt

9128285H9 UNITED STATES TREASURY NOTE 1.9592 10/1/2019 10/31/2020 7,325,000 7,314,253 U.S. Treasury Debt

9128286Q8 UNITED STATES TREASURY NOTE 2.0532 10/1/2019 4/30/2021 2,975,000 2,970,832 U.S. Treasury Debt

CUSIP®

9128283B4 UNITED STATES TREASURY NOTE 1.9622 10/1/2019 10/31/2019 $24,185,000 $24,184,343 U.S. Treasury Debt

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Number of Holdings = 46

*You could lose money by investing in the Fund. Although the Fund seeks to preserve the value of your investment at $1.00

per share, it cannot guarantee it will do so. An investment in the Fund is not insured or guaranteed by the Federal Deposit

Insurance Corporation or any other government agency.

The Fund’s sponsor has no legal obligation to provide financial support to the Fund, and you should not expect that the

sponsor will provide financial support to the Fund at any time

Effective November 13, 2015, Pioneer Cash Reserves Fund was renamed Pioneer U.S. Government Money Market Fund.

1

_{Weighted average maturity (WAM) – The dollar-weighted average portfolio maturity as defined in Rule 2a-7(d)(1)(ii).}

2

_{Weighted average life (WAL) – The dollar-weighted average life maturity as defined in Rule 2a-7(d)(1)(iii).}

3

_{Effective maturity date – The maturity date determined by taking into account the maturity shortening provisions in Rule 2a-7(i) (i.e.,}

the maturity date used to calculate WAM under Rule 2a-7(d)(1)(ii)).

4

_{Final maturity date – The maturity date determined without reference to the exceptions in Rule 2a-7(i) regarding interest rate}

readjustments (i.e., the maturity date used to calculate WAL under Rule 2a-7(d)(1)(iii)).

CUSIP® is a registered trademark of the American Bankers Association. CUSIP® Global Services is managed on behalf of the

American Bankers Association by Standard & Poor's.

The portfolio is actively managed, and current holdings may be different.

For fund descriptions, historical and current performance, standardized returns as of the most recent quarter-end, risk disclosure or a

prospectus, please visit our website at http://amundipioneer.com/us.

Please request a free information kit on any Pioneer fund by ordering from this web site or by calling 1-800-225-6292. The kit includes a

quarterly fact sheet and a prospectus.

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Pioneer U.S. Government Money Market Fund * Portfolio Holdings as of 9/30/2019