Fidelity® Money Market Central Fund

Semi-Annual Report

March 31, 2020

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Contents

Note to Shareholders
Investment Summary
Schedule of Investments
Financial Statements
Notes to Financial Statements
Shareholder Expense Example

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Note to Shareholders:

Early in 2020, the outbreak and spread of a new coronavirus emerged as a public health emergency that had a major influence on financial markets, primarily based on its impact on the global economy and corporate earnings. The virus causes a respiratory disease known as COVID-19. On March 11, the World Health Organization declared the COVID-19 outbreak a pandemic, citing sustained risk of further global spread.

In the weeks following, as the crisis worsened, we witnessed an escalating human tragedy with wide-scale social and economic consequences from coronavirus-containment measures. The outbreak of COVID-19 prompted a number of measures to limit the spread, including travel and border restrictions, quarantines, and restrictions on large gatherings. In turn, these resulted in lower consumer activity, diminished demand for a wide range of products and services, disruption in manufacturing and supply chains, and – given the wide variability in outcomes regarding the outbreak – significant market uncertainty and volatility. Amid the turmoil, the U.S. government took unprecedented action – in concert with the U.S. Federal Reserve and central banks around the world – to help support consumers, businesses, and the broader economy, and to limit disruption to the financial system.

The situation continues to unfold, and the extent and duration of its impact on financial markets and the economy remain highly uncertain. Extreme events such as the coronavirus crisis are “exogenous shocks” that can have significant adverse effects on mutual funds and their investments. Although multiple asset classes may be affected by market disruption, the duration and impact may not be the same for all types of assets.

Fidelity is committed to helping you stay informed amid news about COVID-19 and during increased market volatility, and we’re taking extra steps to be responsive to customer needs. We encourage you to visit our websites, where we offer ongoing updates, commentary, and analysis on the markets and our funds.

Investment Summary (Unaudited)

Effective Maturity Diversification as of March 31, 2020

Days	% of fund's investments 3/31/20
1 - 7	51.0
8 - 30	14.2
31 - 60	20.9
61 - 90	6.1
91 - 180	7.8

Effective maturity is determined in accordance with the requirements of Rule 2a-7 under the Investment Company Act of 1940.

Asset Allocation (% of fund's net assets)

As of March 31, 2020
	Certificates of Deposit	28.8%
	Commercial Paper	33.1%
	Variable Rate Demand Notes (VRDNs)	0.2%
	U.S. Treasury Debt	1.7%
	Non-Negotiable Time Deposit	13.3%
	Other Instruments	0.3%
	Repurchase Agreements	22.8%
	Net Other Assets (Liabilities)^*	(0.2)%

* Net Other Assets (Liabilities) are not included in the pie chart

Schedule of Investments March 31, 2020 (Unaudited)

Showing Percentage of Net Assets

Certificate of Deposit - 28.8%
	Yield(a)	Principal Amount	Value
Domestic Certificates Of Deposit - 0.6%
HSBC Bank U.S.A. NA
4/23/20 to 4/24/20	2.02%	$7,000,000	$7,004,800
Wells Fargo Bank NA
7/27/20	1.06 (b)(c)	4,000,000	3,997,556
			11,002,356
London Branch, Eurodollar, Foreign Banks - 12.3%
Bank of Montreal London Branch
7/20/20	1.54	3,000,000	3,001,041
Credit Agricole SA London Branch
5/4/20 to 7/3/20	1.48 to 1.79	15,000,000	15,005,187
DZ Bank AG London Branch
4/6/20 to 6/22/20	1.66 to 1.91	65,000,000	64,925,236
KBC Bank NV London
4/21/20 to 6/29/20	1.61 to 1.76	56,000,000	55,901,336
Landesbank Hessen-Thueringen London Branch
4/7/20	0.70	26,000,000	26,000,512
Mitsubishi UFJ Trust & Banking Corp.
5/20/20	1.69	2,000,000	1,996,073
Mizuho Bank Ltd. London Branch
5/5/20 to 6/2/20	1.62 to 1.73	18,000,000	17,969,496
Rabobank Nederland London Branch
6/19/20 to 6/22/20	1.66	10,000,000	9,967,962
Sumitomo Mitsui Trust Bank Ltd. London Branch
5/7/20 to 5/29/20	1.74 to 1.82	11,000,000	10,975,365
			205,742,208
New York Branch, Yankee Dollar, Foreign Banks - 15.9%
Bank of Montreal
4/1/20 to 11/17/20	0.85 to 1.77 (b)	63,000,000	62,895,703
Bank of Nova Scotia
8/20/20	1.78 (b)(c)	11,750,000	11,727,149
Bank of Tokyo-Mitsubishi UFJ Ltd.
6/30/20 to 7/16/20	1.00 to 1.60	21,000,000	20,974,680
Barclays Bank PLC
5/4/20	1.75	4,000,000	4,002,214
Mitsubishi UFJ Trust & Banking Corp.
5/13/20 to 7/2/20	0.66 to 1.46 (b)	18,000,000	17,998,781
Mizuho Corporate Bank Ltd.
5/13/20 to 7/1/20	0.92 to 1.46 (b)	39,000,000	39,022,145
Natexis Banques Populaires New York Branch
4/24/20 to 6/5/20	1.06 to 1.81	30,000,000	30,008,034
Royal Bank of Canada
8/27/20 to 9/10/20	0.98 to 1.72 (b)(c)	17,000,000	16,960,236
Sumitomo Mitsui Banking Corp.
5/7/20 to 6/10/20	0.74 to 1.47 (b)(c)	30,000,000	30,002,346
Sumitomo Mitsui Trust Bank Ltd.
4/3/20 to 5/22/20	0.85 to 1.98 (b)	23,000,000	23,006,658
Svenska Handelsbanken, Inc.
8/11/20	0.77 (b)(c)	10,000,000	9,989,303
			266,587,249
TOTAL CERTIFICATE OF DEPOSIT
(Cost $483,410,993)			483,331,813

Financial Company Commercial Paper - 26.4%
Bank of Nova Scotia
7/24/20 to 11/13/20	1.05 to 1.73 (b)(c)	18,000,000	17,996,145
Barclays Bank PLC/Barclays U.S. CCP Funding LLC
5/1/20	1.66 (d)	2,000,000	1,996,132
BNP Paribas Fortis
4/3/20	0.50	1,000,000	999,999
BNP Paribas New York Branch
4/1/20 to 4/3/20	0.04 to 0.50	9,000,000	8,999,997
BPCE SA
6/24/20	1.61	4,000,000	3,990,159
Canadian Imperial Bank of Commerce
4/3/20 to 9/14/20	0.40 to 1.05 (b)	60,000,000	59,858,182
Citigroup Global Markets, Inc.
8/3/20 to 8/5/20	0.86	10,000,000	9,947,991
Credit Suisse AG
4/21/20 to 4/22/20	2.03	9,000,000	8,995,898
DZ BANK AG
4/16/20	1.73	10,000,000	9,994,964
Federation des caisses Desjardin
4/1/20 to 8/28/20	0.07 to 1.61	18,000,000	17,954,348
Landesbank Baden-Wurttemberg
4/1/20	0.05	26,000,000	26,000,000
Mitsubishi UFJ Trust & Banking Corp.
5/4/20 to 5/18/20	1.69 to 1.71	24,000,000	23,970,489
Natexis Banques Populaires New York Branch
5/4/20 to 6/24/20	1.61 to 1.72	20,000,000	19,970,238
National Australia Bank Ltd.
4/1/20	2.05	4,000,000	3,999,888
National Bank of Canada
5/8/20 to 8/3/20	1.60 to 1.90 (b)	17,000,000	16,983,980
Nationwide Building Society
4/1/20	1.63	2,000,000	1,999,997
Ontario Teachers' Finance Trust
4/2/20	2.03 (d)	3,000,000	2,999,920
Rabobank Nederland New York Branch
4/1/20	0.05	6,000,000	6,000,000
Royal Bank of Canada
4/15/20 to 9/4/20	0.88 to 1.76 (b)	33,000,000	32,909,158
Societe Generale
4/3/20 to 4/7/20	0.24 to 0.49	54,000,000	53,999,043
Sumitomo Mitsui Trust Bank Ltd.
4/24/20 to 6/19/20	1.61 to 1.85	38,000,000	37,931,576
Svenska Handelsbanken AB
9/4/20	0.92	11,000,000	10,938,260
The Toronto-Dominion Bank
7/23/20 to 11/10/20	0.94 to 1.93 (b)(c)	57,000,000	56,872,640
Toyota Motor Credit Corp.
7/2/20	1.96 (b)(c)	2,000,000	1,996,103
UBS AG London Branch
4/23/20	2.02	5,000,000	4,996,400
TOTAL FINANCIAL COMPANY COMMERCIAL PAPER
(Cost $442,520,178)			442,301,507

Asset Backed Commercial Paper - 5.2%
Atlantic Asset Securitization Corp. (Liquidity Facility Credit Agricole CIB)

4/1/20	0.07	1,000,000	1,000,000
5/19/20	1.65	13,000,000	12,973,334
6/17/20	1.61	7,000,000	6,977,250
Autobahn Funding Co. LLC (Liquidity Facility DZ BANK AG)

4/1/20	1.60	1,000,000	999,979
4/3/20	0.60	12,000,000	11,999,125
Gotham Funding Corp. (Liquidity Facility Bank of Tokyo-Mitsubishi UFJ Ltd.)
4/3/20	2.00	1,000,000	1,000,000
Manhattan Asset Funding Co. LLC (Liquidity Facility Sumitomo Mitsui Banking Corp.)

4/1/20	0.15	7,000,000	7,000,000
4/13/20	1.00	2,000,000	1,999,333
4/16/20	1.60	2,980,000	2,977,987
5/11/20	1.70	8,000,000	7,986,242
5/4/20	1.71	8,420,000	8,407,992
5/6/20	1.70	17,000,000	16,974,330
5/7/20	1.60	1,000,000	998,448
5/8/20	1.70	3,000,000	2,995,218
Sheffield Receivables Corp. (Liquidity Facility Barclays Bank PLC)

5/11/20	1.69	1,000,000	997,927
5/12/20	1.69	2,000,000	1,995,730
TOTAL ASSET BACKED COMMERCIAL PAPER
(Cost $87,275,874)			87,282,895

Non-Financial Company Commercial Paper - 1.5%
American Electric Power Co., Inc.
4/1/20 to 4/9/20	1.75 to 1.76	4,650,000	4,648,927
Dominion Energy, Inc.
4/2/20 to 4/27/20	1.40 to 1.77	11,000,000	10,991,410
Duke Energy Corp.
4/8/20 to 4/9/20	1.40 to 1.75	2,000,000	1,998,637
Sempra Global
4/2/20	1.86	1,000,000	999,860
4/3/20	1.86	1,000,000	999,785
4/7/20	1.86	1,000,000	999,456
4/9/20	1.78	1,000,000	999,272
TransCanada PipeLines Ltd.
4/2/20 to 4/13/20	1.75 to 1.81	3,000,000	2,998,587
TOTAL NON-FINANCIAL COMPANY COMMERCIAL PAPER
(Cost $24,643,423)			24,635,934

U.S. Treasury Debt - 1.7%
U.S. Treasury Obligations - 1.7%
U.S. Treasury Bills
5/7/20	0.03	25,000,000	24,998,213
U.S. Treasury Notes
10/31/21	0.39 (b)(c)	3,000,000	3,008,413
TOTAL U.S. TREASURY DEBT
(Cost $28,000,307)			28,006,626

Other Instrument - 0.3%
Master Notes - 0.3%
Toyota Motor Credit Corp.
4/7/20
(Cost $5,000,000)	0.93 (b)(c)(e)	5,000,000	5,000,000

Variable Rate Demand Note - 0.2%
Michigan - 0.2%
Michigan Strategic Fund Ltd. Oblig. Rev. (Henry Ford Museum & Greenfield Village Proj.) Series 2002, 0.85% 4/1/20, LOC Comerica Bank, VRDN 4/1/20
(Cost $3,870,000)	0.85 (b)	3,870,000	3,870,000

Non-Negotiable Time Deposit - 13.3%
Time Deposits - 13.3%
Abn Amro Bank NV(TD)
4/1/20	0.08	12,000,000	12,000,000
Australia & New Zealand Banking Group Ltd.
4/1/20	0.05	13,000,000	13,000,000
Bank of Nova Scotia
4/1/20	0.08	54,000,000	54,000,000
Barclays Bank PLC
4/1/20	0.25	77,000,000	77,000,000
Credit Agricole CIB
4/1/20	0.06	22,000,000	22,000,000
Credit Suisse AG
4/1/20	0.10	26,000,000	26,000,000
Landesbank Hessen-Thuringen London Branch
4/3/20	0.50	12,000,000	11,999,980
Mizuho Bank Ltd.
4/1/20	0.03	7,000,000	7,000,000
TOTAL NON-NEGOTIABLE TIME DEPOSIT
(Cost $223,000,000)			222,999,980

U.S. Government Agency Repurchase Agreement -11.2%
	Maturity Amount	Value
In a joint trading account at 0.02% dated 3/31/20 due 4/1/20 (Collateralized by (U.S. Government Obligations) #	$186,683,080	$186,683,000
With Deutsche Bank AG, New York at 0.02%, dated 3/31/20 due 4/1/20 (Collateralized by U.S. Treasury Obligations valued at $2,040,001, 0.05% - 3.00%, 3/31/25 - 10/1/49	2,000,001	2,000,000
TOTAL U.S. GOVERNMENT AGENCY REPURCHASE AGREEMENT
(Cost $188,683,000)		188,683,000

U.S. Treasury Repurchase Agreement - 1.7%
With:
BNP Paribas, SA at 1.61%, dated 2/18/20 due 4/7/20 (Collateralized by U.S. Treasury Obligations valued at $6,131,798, 0.30% - 5.25%, 10/31/21 - 2/15/38)	6,024,150	6,000,000
Credit Agricole CIB at 0.02%, dated 3/31/20 due 4/1/20 (Collateralized by U.S. Treasury Obligations valued at $5,134,069, 1.38% - 2.25%, 9/15/20 - 2/15/27)	5,000,003	5,000,000
HSBC Securities, Inc. at 0.01%, dated 3/31/20 due 4/1/20 (Collateralized by U.S. Treasury Obligations valued at $3,087,982, 2.00%, 11/15/26)	3,000,001	3,000,000
ING Financial Markets LLC at 0.01%, dated 3/31/20 due 4/1/20 (Collateralized by U.S. Treasury Obligations valued at $6,136,450, 1.38%, 6/30/23)	6,000,002	6,000,000
MUFG Securities EMEA PLC at 0.01%, dated 3/31/20 due 4/1/20:
(Collateralized by U.S. Treasury Obligations valued at $5,119,074, 1.50% - 2.25%, 9/30/21 - 8/15/46)	5,000,001	5,000,000
(Collateralized by U.S. Treasury Obligations valued at $3,067,080, 2.00% - 2.25%, 5/31/24 - 8/15/46)	3,000,001	3,000,000
TOTAL U.S. TREASURY REPURCHASE AGREEMENT
(Cost $28,000,000)		28,000,000

Other Repurchase Agreement - 9.9%
Other Repurchase Agreement - 9.9%
With:
BMO Capital Markets Corp. at 0.43%, dated 3/31/20 due 4/1/20 (Collateralized by Corporate Obligations valued at $17,998,285, 2.50% - 8.75%, 5/15/22 - 9/15/44)	17,000,203	17,000,000
BNP Paribas at 0.33%, dated 3/31/20 due 4/1/20 (Collateralized by Corporate Obligations valued at $7,350,068, 2.40% - 6.30%, 2/1/23 - 1/1/50)	7,000,064	7,000,000
BofA Securities, Inc. at 0.58%, dated 3/31/20 due 4/1/20 (Collateralized by U.S. Treasury Obligations valued at $3,450,056, 0.50% - 3.00%, 3/31/25 - 10/1/49)	3,000,048	3,000,000
Citigroup Global Markets, Inc. at:
1.01%, dated 10/18/19 due 4/15/20 (Collateralized by Corporate Obligations valued at $3,241,288, 0.62% - 2.79%, 11/5/35 - 11/25/47)(b)(c)(f)	3,015,174	3,000,000
1.21%, dated 11/12/19 due 5/5/20 (Collateralized by Corporate Obligations valued at $4,322,909, 1.45% - 4.04%, 10/3/45 - 10/6/46)(b)(c)(f)	4,024,362	4,000,000
1.81%, dated 3/4/20 due 5/5/20 (Collateralized by Corporate Obligations valued at $2,102,273, 0.00% - 5.92%, 10/20/28 - 1/12/39)(b)(c)(f)	2,018,057	1,998,238
2.07%, dated 2/24/20 due 5/27/20 (Collateralized by Municipal Bond Obligations valued at $3,246,570, 0.00% - 1.63%, 10/31/26 - 7/1/42)	3,016,043	3,000,000
Credit AG CIB Paris at 0.8%, dated:
3/27/20 due 4/3/20 (Collateralized by Corporate Obligations valued at $1,050,117, 2.75%, 1/11/23)	1,000,156	1,000,000
3/31/20 due 4/6/20 (Collateralized by Corporate Obligations valued at $3,150,070, 2.75% - 2.91%, 1/11/23 - 10/2/23)	3,000,400	3,000,000
4/1/20 due 4/7/20 (Collateralized by U.S. Treasury Obligations)(g)	3,000,400	3,000,000
Credit Suisse Securities (U.S.A.) LLC at 1.66%, dated 3/2/20 due 6/4/20 (Collateralized by Mortgage Loan Obligations valued at $3,154,358, 4.23%, 2/16/46)	3,020,750	3,005,104
Deutsche Bank AG at 0.58%, dated 3/31/20 due 4/1/20 (Collateralized by Corporate Obligations valued at $4,080,538, 0.00% - 2.50%, 2/10/22 - 11/1/29)	4,000,064	4,000,000
HSBC Securities, Inc. at 0.43%, dated 3/31/20 due 4/1/20 (Collateralized by Corporate Obligations valued at $7,350,088, 3.30% - 4.25%, 11/28/22 - 10/15/50)	7,000,084	7,000,000
ING Financial Markets LLC at:
0.25%, dated 3/31/20 due 4/1/20 (Collateralized by Corporate Obligations valued at $1,050,008, 2.35% - 4.45%, 1/15/22 - 9/15/24)	1,000,007	1,000,000
0.3%, dated 3/31/20 due 4/1/20 (Collateralized by Equity Securities valued at $1,080,025)	1,000,008	1,000,000
1.32%, dated 3/5/20 due 5/4/20 (Collateralized by Equity Securities valued at $3,243,237)	3,006,600	3,000,000
J.P. Morgan Securities, LLC at 0.34%, dated 3/12/20 due 4/7/20 (Collateralized by Equity Securities valued at $12,964,483)(b)(c)(f)	12,002,833	12,000,000
Mitsubishi UFJ Securities (U.S.A.), Inc. at 0.38%, dated 3/31/20 due 4/1/20 (Collateralized by Equity Securities valued at $4,320,054)	4,000,042	4,000,000
Mizuho Securities U.S.A., Inc. at:
0.53%, dated 3/31/20 due 4/1/20 (Collateralized by U.S. Government Obligations valued at $2,040,031, 3.00%, 3/1/50)	2,000,029	2,000,000
0.58%, dated 3/31/20 due 4/1/20:
(Collateralized by U.S. Government Obligations valued at $1,020,017, 3.00%, 3/1/50)	1,000,016	1,000,000
(Collateralized by Equity Securities valued at $10,800,176)	10,000,161	10,000,000
1.08%, dated 3/31/20 due 4/1/20 (Collateralized by U.S. Government Obligations valued at $4,080,123, 3.00%, 3/1/50)	4,000,120	4,000,000
2.08%, dated 2/25/20 due 4/27/20 (Collateralized by Municipal Bond Obligations valued at $2,104,369, 4.00%, 3/1/36)	2,007,164	2,000,000
Morgan Stanley & Co., Inc. at 2.08%, dated 2/5/20 due 5/5/20 (Collateralized by Mortgage Loan Obligations valued at $1,116,384, 1.09% - 9.00%, 8/20/20 - 5/15/67)	1,005,200	1,001,230
RBS Securities, Inc. at 0.35%, dated 3/31/20 due 4/1/20 (Collateralized by U.S. Treasury Obligations valued at $4,080,064, 0.99% - 1.88%, 2/21/23 - 8/31/24)	4,000,039	4,000,000
Societe Generale at:
0.45%, dated 3/31/20 due 4/1/20 (Collateralized by Corporate Obligations valued at $7,350,096, 0.68% - 6.38%, 11/16/20 - 1/21/44)	7,000,088	7,000,000
0.5%, dated 3/31/20 due 4/1/20 (Collateralized by Corporate Obligations valued at $9,579,814, 0.68% - 12.00%, 8/15/20 - 4/4/51)	9,000,125	9,000,000
0.55%, dated 3/31/20 due 4/1/20 (Collateralized by Corporate Obligations valued at $8,452,697, 1.13% - 8.50%, 5/27/21 - 7/17/47)	8,000,122	8,000,000
0.6%, dated 3/31/20 due 4/7/20 (Collateralized by Corporate Obligations valued at $4,266,914, 0.75% - 9.00%, 8/15/21 - 7/15/28)	4,000,467	4,000,000
0.65%, dated 3/31/20 due 4/7/20 (Collateralized by Mortgage Loan Obligations valued at $1,076,600, 0.68% - 8.15%, 11/4/20 - 3/24/51)	1,000,126	1,000,000
Wells Fargo Securities, LLC at:
0.55%, dated 3/31/20 due 4/1/20 (Collateralized by Commercial Paper valued at $6,180,095, 6/15/20)	6,000,092	6,000,000
0.75%, dated 3/31/20 due 4/1/20:
(Collateralized by Corporate Obligations valued at $14,040,293, 0.75% - 5.25%, 7/1/21 - 1/1/27)	13,000,271	13,000,000
(Collateralized by Corporate Obligations valued at $4,320,090, 0.00% - 6.50%, 3/15/21 - 5/15/48)	4,000,083	4,000,000
(Collateralized by Corporate Obligations valued at $4,320,090, 1.08% - 6.04%, 11/25/32 - 4/7/52)	4,000,083	4,000,000
0.8%, dated 3/30/20 due 4/6/20 (Collateralized by Corporate Obligations valued at $6,480,471, 1.00% - 3.00%, 7/1/20 - 1/15/25)	6,000,933	6,000,000

TOTAL OTHER REPURCHASE AGREEMENTS
(Cost $167,000,000)		167,004,572
TOTAL INVESTMENT IN SECURITIES - 100.2%
(Cost $1,681,403,775)		1,681,116,327
NET OTHER ASSETS (LIABILITIES) - (0.2)%		(3,213,236)
NET ASSETS - 100%		$1,677,903,091

The date shown for securities represents the date when principal payments must be paid, taking into account any call options exercised by the issuer and any permissible maturity shortening features other than interest rate resets.

Legend

(a) Yield represents either the annualized yield at the date of purchase, or the stated coupon rate, or, for floating and adjustable rate securities, the rate at period end.

(b) Coupon rates for floating and adjustable rate securities reflect the rates in effect at period end.

(c) Coupon is indexed to a floating interest rate which may be multiplied by a specified factor and/or subject to caps or floors.

(d) Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers. At the end of the period, the value of these securities amounted to $4,996,052 or 0.3% of net assets.

(e) Restricted securities (including private placements) - Investment in securities not registered under the Securities Act of 1933 (excluding 144A issues). At the end of the period, the value of restricted securities (excluding 144A issues) amounted to $5,000,000 or 0.3% of net assets.

(f) The maturity amount is based on the rate at period end.

(g) Represents a forward settling transaction and therefore no collateral securities had been allocated as of period end. The agreement contemplated the delivery of U.S. Treasury Obligations as collateral on settlement date.

Additional information on each restricted holding is as follows:

Security	Acquisition Date	Cost
Toyota Motor Credit Corp. 0.93%, 4/7/20	3/2/20	$5,000,000.00

Investment Valuation

All investments are categorized as Level 2 under the Fair Value Hierarchy. The inputs or methodology used for valuing securities may not be an indication of the risk associated with investing in those securities. For more information on valuation inputs please refer to the Investment Valuation section in the accompanying Notes to Financial Statements.

Other Information

# Additional information on each counterparty to the repurchase agreement is as follows:

Repurchase Agreement / Counterparty	Value
$186,683,000 due 4/01/20 at 0.02%
BNP Paribas, S.A.	$16,572,000
BNY Mellon Capital Markets LLC	10,959,000
Bank Of America, N.A.	9,699,000
Bank of Nova Scotia	1,176,000
Bofa Secs Inc	5,110,000
Citibank NA	4,130,000
Citigroup Global Markets, Inc.	101,000
HSBC Securities (USA), Inc.	13,912,000
ING Financial Markets LLC	881,000
Jp Morgan Secs Llc	37,597,000
Mitsubishi Ufj Secs Hldgs Ltd	8,565,000
Mitsubishi Ufj Securities (USA	1,049,000
Mizuho Securities USA, Inc.	3,075,000
Nomura Securities Internationa	24,159,000
Societe Generale (PARIS)	5,447,000
Sumitomo Mitsu Bk Corp Ny (DI)	3,409,000
Sumitomo Mitsui Bk Corp (REPO)	29,841,000
Wells Fargo Securities LLC	11,001,000
	$186,683,000

See accompanying notes which are an integral part of the financial statements.

Financial Statements

Statement of Assets and Liabilities

		March 31, 2020 (Unaudited)
Assets
Investment in securities, at value (including repurchase agreements of $383,687,572) — See accompanying schedule: Unaffiliated issuers (cost $1,681,403,775)		$1,681,116,327
Receivable for fund shares sold		102,406
Interest receivable		684,061
Total assets		1,681,902,794
Liabilities
Payable to custodian bank	$15
Payable for investments purchased	3,000,000
Payable for fund shares redeemed	952,830
Other payables and accrued expenses	46,858
Total liabilities		3,999,703
Net Assets		$1,677,903,091
Net Assets consist of:
Paid in capital		$1,678,121,616
Total accumulated earnings (loss)		(218,525)
Net Assets		$1,677,903,091
Net Asset Value, offering price and redemption price per share ($1,677,903,091 ÷ 1,678,194,407 shares)		$.9998

See accompanying notes which are an integral part of the financial statements.

Statement of Operations

		Six months ended March 31, 2020 (Unaudited)
Investment Income
Interest (including $131,181 from affiliated interfund lending)		$16,001,303
Expenses
Custodian fees and expenses	$68,733
Independent trustees' fees and expenses	3,204
Interest	16,933
Total expenses before reductions	88,870
Expense reductions	(337)
Total expenses after reductions		88,533
Net investment income (loss)		15,912,770
Realized and Unrealized Gain (Loss)
Net realized gain (loss) on:
Investment securities:
Unaffiliated issuers		3,883
Total net realized gain (loss)		3,883
Change in net unrealized appreciation (depreciation) on investment securities		(335,056)
Net increase in net assets resulting from operations		$15,581,597

See accompanying notes which are an integral part of the financial statements.

Statement of Changes in Net Assets

	Six months ended March 31, 2020 (Unaudited)	Year ended September 30, 2019
Increase (Decrease) in Net Assets
Operations
Net investment income (loss)	$15,912,770	$45,517,809
Net realized gain (loss)	3,883	5,116
Change in net unrealized appreciation (depreciation)	(335,056)	(36,763)
Net increase in net assets resulting from operations	15,581,597	45,486,162
Distributions to shareholders	(15,912,672)	(45,517,833)
Affiliated share transactions
Proceeds from sales of shares	127,934,789	219,693,319
Reinvestment of distributions	15,912,672	45,517,833
Cost of shares redeemed	(286,445,101)	(136,395,201)
Net increase (decrease) in net assets and shares resulting from share transactions	(142,597,640)	128,815,951
Total increase (decrease) in net assets	(142,928,715)	128,784,280
Net Assets
Beginning of period	1,820,831,806	1,692,047,526
End of period	$1,677,903,091	$1,820,831,806
Other Information
Shares
Sold	127,918,385	219,676,161
Issued in reinvestment of distributions	15,910,541	45,515,159
Redeemed	(286,402,463)	(136,386,867)
Net increase (decrease)	(142,573,537)	128,804,453

See accompanying notes which are an integral part of the financial statements.

Financial Highlights

Fidelity Money Market Central Fund

	Six months ended (Unaudited) March 31,	Years endedSeptember 30,
	2020	2019	2018	2017	2016 ^A	2015
Selected Per–Share Data
Net asset value, beginning of period	$1.0000	$1.0000	$1.0001	$1.0002	$1.0000	$1.00
Income from Investment Operations
Net investment income (loss)	.0092	.0253	.0190	.0117	.0062	.003
Net realized and unrealized gain (loss)	(.0002)	–^B	(.0001)	(.0001)	.0003	–^B
Total from investment operations	.0090	.0253	.0189	.0116	.0065	.003
Distributions from net investment income	(.0092)	(.0253)	(.0190)	(.0117)	(.0062)	(.003)
Distributions from net realized gain	–	–	–	–	(.0001)	–
Total distributions	(.0092)	(.0253)	(.0190)	(.0117)	(.0063)	(.003)
Net asset value, end of period	$.9998	$1.0000	$1.0000	$1.0001	$1.0002	$1.00
Total Return^C,^D	.90%	2.56%	1.91%	1.16%	.66%	.29%
Ratios to Average Net Assets^E
Expenses before reductions	.01%^F	.01%	- %^G	- %^G	- %^G	- %^G
Expenses net of fee waivers, if any	.01%^F	.01%	- %^G	- %^G	- %^G	- %^G
Expenses net of all reductions	.01%^F	.01%	- %^G	- %^G	- %^G	- %^G
Net investment income (loss)	1.84%^F	2.53%	1.89%	1.18%	.64%	.29%
Supplemental Data
Net assets, end of period (000 omitted)	$1,677,903	$1,820,832	$1,692,048	$2,179,954	$1,820,790	$1,225,937

^A Beginning September 12, 2016 the Fund began selling and redeeming class shares based upon the market-based value of the securities held rounded to the fourth decimal place; a "floating" net asset value.

^B Amount represents less than $.00005 or $.0005 per share.

^C Total returns for periods of less than one year are not annualized.

^D Total returns would have been lower if certain expenses had not been reduced during the applicable periods shown.

^E Expense ratios reflect operating expenses of the Fund. Expenses before reductions do not reflect amounts reimbursed or waived or reductions from expense offset arrangements and do not represent the amount paid by the Fund during periods when reimbursements, waivers or reductions occur. Expenses net of fee waivers reflect expenses after reimbursement and waivers but prior to reductions from expense offset arrangements. Expenses net of all reductions represent the net expenses paid by the Fund.

^F Annualized

^G Amount represents less than .005%.

See accompanying notes which are an integral part of the financial statements.

Notes to Financial Statements (Unaudited)

For the period ended March 31, 2020

1. Organization.

Fidelity Money Market Central Fund (the Fund) is a fund of Fidelity Garrison Street Trust (the Trust) and is authorized to issue an unlimited number of shares. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Massachusetts business trust. Shares of the Fund are only offered to other investment companies and accounts (the Investing Funds) managed by Fidelity Management & Research Company LLC (FMR), or its affiliates. The Fund has been designated an institutional money market fund, and the value of the Fund's shares are calculated to four decimal places that fluctuates based upon changes in the value of the Fund's investments.

Effective January 1, 2020, investment advisers Fidelity Investments Money Management, Inc., FMR Co., Inc., and Fidelity SelectCo, LLC, merged with and into Fidelity Management & Research Company. In connection with the merger transactions, the resulting, merged investment adviser was then redomiciled from Massachusetts to Delaware, changed its corporate structure from a corporation to a limited liability company, and changed its name to "Fidelity Management & Research Company LLC".

2. Significant Accounting Policies.

The Fund is an investment company and applies the accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services – Investments Companies. The financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (GAAP), which require management to make certain estimates and assumptions at the date of the financial statements. Actual results could differ from those estimates. Subsequent events, if any, through the date that the financial statements were issued have been evaluated in the preparation of the financial statements. The following summarizes the significant accounting policies of the Fund:

Investment Valuation. Investments are valued as of 4:00 p.m. Eastern time on the last calendar day of the period. The Board of Trustees (the Board) has delegated the day to day responsibility for the valuation of the Fund's investments to the Fair Value Committee (the Committee) established by the Fund's investment adviser. In accordance with valuation policies and procedures approved by the Board, the Fund attempts to obtain prices from one or more third party pricing vendors or brokers to value its investments. When current market prices, quotations or currency exchange rates are not readily available or reliable, investments will be fair valued in good faith by the Committee, in accordance with procedures adopted by the Board. Factors used in determining fair value vary by investment type and may include market or investment specific events, changes in interest rates and credit quality. The frequency with which these procedures are used cannot be predicted and they may be utilized to a significant extent. The Committee oversees the Fund's valuation policies and procedures and reports to the Board on the Committee's activities and fair value determinations. The Board monitors the appropriateness of the procedures used in valuing the Fund's investments and ratifies the fair value determinations of the Committee.

The Fund categorizes the inputs to valuation techniques used to value its investments into a disclosure hierarchy consisting of three levels as shown below:

Level 1 – quoted prices in active markets for identical investments

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

Level 3 – unobservable inputs (including the Fund's own assumptions based on the best information available)

Valuation techniques used to value the Fund's investments by major category are as follows:

Debt securities, including restricted securities, are valued based on evaluated prices received from third party pricing vendors or from brokers who make markets in such securities. U.S. government and government agency obligations, commercial paper, certificates of deposit, master notes, municipal securities and other short-term securities are valued by pricing vendors who utilize matrix pricing which considers yield or price of bonds of comparable quality, coupon, maturity and type or by broker-supplied prices. When independent prices are unavailable or unreliable, debt securities may be valued utilizing pricing methodologies which consider similar factors that would be used by third party pricing vendors. Debt securities are generally categorized as Level 2 in the hierarchy but may be Level 3 depending on the circumstances.

Short-term securities with remaining maturities of sixty days or less may be valued at amortized cost, which approximates fair value, and are categorized as Level 2 in the hierarchy.

Securities held by a money market fund are generally high quality and liquid; however, they are reflected as Level 2 because the inputs used to determine fair value are not quoted prices in an active market.

Investment Transactions and Income. Security transactions are accounted for as of trade date. Gains and losses on securities sold are determined on the basis of identified cost. Interest income is accrued as earned and includes coupon interest and amortization of premium and accretion of discount on debt securities as applicable.

The principal amount on inflation-indexed securities is periodically adjusted to the rate of inflation and interest is accrued based on the principal amount. The adjustments to principal due to inflation are reflected as increases or decreases to Interest in the accompanying Statement of Operations.

Expenses. Expenses directly attributable to a fund are charged to that fund. Expenses attributable to more than one fund are allocated among the respective funds on the basis of relative net assets or other appropriate methods. Expense estimates are accrued in the period to which they relate and adjustments are made when actual amounts are known.

Income Tax Information and Distributions to Shareholders. Each year, the Fund intends to qualify as a regulated investment company under Subchapter M of the Internal Revenue Code, including distributing substantially all of its taxable income and realized gains. As a result, no provision for U.S. Federal income taxes is required. The Fund files a U.S. federal tax return, in addition to state and local tax returns as required. The Fund's federal income tax returns are subject to examination by the Internal Revenue Service (IRS) for a period of three fiscal years after they are filed. State and local tax returns may be subject to examination for an additional fiscal year depending on the jurisdiction.

Distributions are declared and recorded daily and paid monthly from net investment income. Distributions from realized gains, if any, are declared and recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP.

Capital accounts within the financial statements are adjusted for permanent book-tax differences. These adjustments have no impact on net assets or the results of operations. Capital accounts are not adjusted for temporary book-tax differences which will reverse in a subsequent period.

As of period end, the cost and unrealized appreciation (depreciation) in securities for federal income tax purposes were as follows:

Gross unrealized appreciation	$235,691
Gross unrealized depreciation	(523,139)
Net unrealized appreciation (depreciation)	$(287,448)
Tax cost	$1,681,403,775

Repurchase Agreements. Pursuant to an Exemptive Order issued by the Securities and Exchange Commission (the SEC), the Fund along with other registered investment companies having management contracts with FMR, or other affiliated entities of FMR, are permitted to transfer uninvested cash balances into joint trading accounts which are then invested in repurchase agreements. The Fund may also invest directly with institutions in repurchase agreements. Upon settlement date, collateral is held in segregated accounts with custodian banks and may be obtained in the event of a default of the counterparty. The Fund monitors, on a daily basis, the value of the collateral to ensure it is at least equal to the principal amount of the repurchase agreement (including accrued interest). In the event of a default by the counterparty, realization of the collateral proceeds could be delayed, during which time the value of the collateral may decline.

Reverse Repurchase Agreements. To enhance its yield, the Fund may enter into reverse repurchase transactions under master repurchase agreements whereby the Fund sells securities to a counterparty in return for cash and agrees to repurchase those securities at a future date and agreed upon price. During the period that reverse repurchase transactions are outstanding, the Fund identifies the securities as pledged in its records with an initial value at least equal to its principal obligation under the agreement. The cash proceeds received by the Fund may be invested in other securities. To the extent cash proceeds received from the counterparty exceed the value of the securities sold, the counterparty may request additional collateral from the Fund. If the counterparty defaults on its obligation, because of insolvency or other reasons, the Fund could experience delays and costs in recovering the securities sold. Information regarding securities sold under a reverse repurchase agreement, if any, is included at the end of the Fund's Schedule of Investments and the cash proceeds are recorded as a liability in the accompanying Statement of Assets and Liabilities. The Fund continues to receive interest and dividend payments on the securities sold during the term of the reverse repurchase agreement. During the period, the average principal balance of reverse repurchase transactions was $25,015,409 and the weighted average interest rate was 1.22% with payments included in the Statement of Operations as a component of interest expense. At period end, there were no reverse repurchase agreements outstanding.

Restricted Securities (including Private Placements). The Fund may invest in securities that are subject to legal or contractual restrictions on resale. These securities generally may be resold in transactions exempt from registration or to the public if the securities are registered. Disposal of these securities may involve time-consuming negotiations and expense, and prompt sale at an acceptable price may be difficult. Information regarding restricted securities is included at the end of the Fund's Schedule of Investments.

3. Fees and Other Transactions with Affiliates.

Management Fee and Expense Contract. Fidelity Management & Research Company LLC (the investment adviser) provides the Fund with investment management services. The Fund does not pay any fees for these services. Pursuant to the Fund's management contract, the investment adviser receives a monthly management fee that represents a portion of the management fees it receives from the Investing Funds. In addition, under an expense contract, the investment adviser also pays all other expenses of the Fund, excluding custody fees, the compensation of the independent Trustees, and certain miscellaneous expenses such as proxy and shareholder meeting expenses.

Interfund Lending Program. Pursuant to an Exemptive Order issued by the SEC, the fund, along with other registered investment companies having management contracts with FMR, or other affiliated entities of FMR, may participate in an interfund lending program. This program provides an alternative credit facility allowing the fund to borrow from, or lend money to, other participating affiliated funds. At period end, there were no interfund loans outstanding. Activity in this program during the period for which loans were outstanding was as follows:

		Average Loan Balance	Weighted Average Interest Rate
Fidelity Money Market Central Fund	Lender	32,045,000	1.34%

Interfund Trades. Funds may purchase from or sell securities to other Fidelity Funds under procedures adopted by the Board. The procedures have been designed to ensure these interfund trades are executed in accordance with Rule 17a-7 of the 1940 Act.

4. Expense Reductions.

Through arrangements with the Fund's custodian, credits realized as a result of certain uninvested cash balances were used to reduce the Fund's expenses by $337.

5. Other.

The Fund's organizational documents provide former and current trustees and officers with a limited indemnification against liabilities arising in connection with the performance of their duties to the Fund. In the normal course of business, the Fund may also enter into contracts that provide general indemnifications. The Fund's maximum exposure under these arrangements is unknown as this would be dependent on future claims that may be made against the Fund. The risk of material loss from such claims is considered remote.

At the end of the period, mutual funds managed by the investment adviser or its affiliates were the owners of record of all of the outstanding shares of the Fund.

6. Coronavirus (COVID-19) Pandemic.

An outbreak of COVID-19 first detected in China during December 2019 has since spread globally and was declared a pandemic by the World Health Organization during March 2020. Developments that disrupt global economies and financial markets, such as the COVID-19 pandemic, may magnify factors that affect the Fund's performance.

Shareholder Expense Example

As a shareholder of the Fund, you incur two types of costs: (1) transaction costs, and (2) ongoing costs, including other Fund expenses. This Example is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds.

The Example is based on an investment of $1,000 invested at the beginning of the period and held for the entire period (October 1, 2019 to March 31, 2020).

Actual Expenses

The first line of the accompanying table provides information about actual account values and actual expenses. You may use the information in this line, together with the amount you invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000.00 (for example, an $8,600 account value divided by $1,000.00 = 8.6), then multiply the result by the number in the first line under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period.

Hypothetical Example for Comparison Purposes

The second line of the accompanying table provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds.

Please note that the expenses shown in the table are meant to highlight your ongoing costs only and do not reflect any transaction costs. Therefore, the second line of the table is useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds.

	Annualized Expense Ratio-^A	Beginning Account Value October 1, 2019	Ending Account Value March 31, 2020	Expenses Paid During Period-^B October 1, 2019 to March 31, 2020
Actual	.0103%	$1,000.00	$1,009.00	$.05
Hypothetical-^C		$1,000.00	$1,024.95	$.05

^A Annualized expense ratio reflects expenses net of applicable fee waivers.

^B Expenses are equal to the Fund's annualized expense ratio, multiplied by the average account value over the period, multiplied by 183/366 (to reflect the one-half year period).

^C 5% return per year before expenses

Fidelity Investments

CFM-SANN-0520
1.756671.119


By:	/s/Laura M. Del Prato
	Laura M. Del Prato
	President and Treasurer

Date:	May 22, 2020


By:	/s/Laura M. Del Prato
	Laura M. Del Prato
	President and Treasurer

Date:	May 22, 2020


By:	/s/John J. Burke III
	John J. Burke III
	Chief Financial Officer

Date:	May 22, 2020


Date of fiscal year end:	September 30

Date of reporting period:	March 31, 2020


(a)	(1)	Not applicable.
(a)	(2)	Certification pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) is filed and attached hereto as Exhibit 99.CERT.
(a)	(3)	Not applicable.
(b)		Certification pursuant to Rule 30a-2(b) under the Investment Company Act of 1940 (17 CFR 270.30a-2(b)) is furnished and attached hereto as Exhibit 99.906CERT.