Consolidated Schedule of Investments  (unaudited) September 30, 2021 BlackRock Science and Technology Trust (BST) (Percentages shown are based on Net Assets)

Security	Shares		Value
Common Stocks
Airlines — 0.2%
Lilium N.V., (Acquired 09/13/21, Cost: $3,500,000)(a)		350,000	$	3,398,315
Automobiles — 2.3%
Arrival Ltd., (Acquired 09/27/21, Cost: $6,054,721)(a)		835,013		10,980,421
Arrival SA(b)(c)(d)		180,232		2,370,051
Tesla, Inc.(b)(c)		34,934		27,090,618
				40,441,090
Banks — 2.1%
Klarna Holdings AB, (Acquired 08/07/19, Cost: $7,971,978)(a)(e)		26,430		36,387,653
Capital Markets — 0.4%
Robinhood Markets, Inc., Class A(b)(c)(d)		168,360		7,084,589
Diversified Consumer Services — 0.7%
Chegg, Inc.(b)(c)		132,939		9,042,511
Think & Learn Private Ltd., (Acquired 09/30/20, Cost: $1,524,948)(a)(e)		997		3,828,996
				12,871,507
Diversified Financial Services — 0.6%
TransferWise		27,945		10,649,020
Electrical Equipment(b)(c) — 0.8%
Array Technologies, Inc.		461,679		8,550,295
Shoals Technologies Group, Inc., Class A		194,549		5,424,026
				13,974,321
Electronic Equipment, Instruments & Components — 0.8%
Samsung SDI Co. Ltd		24,747		14,767,026
Entertainment — 2.3%
Activision Blizzard, Inc.(b)		155,236		12,013,714
Krafton, Inc.(c)(d)		31,356		13,294,521
Roku, Inc.(b)(c)		47,235		14,801,087
				40,109,322
Hotels, Restaurants & Leisure — 0.4%
Airbnb, Inc., Class A(b)(c)		37,252		6,249,023
Interactive Media & Services — 9.6%
Alphabet, Inc., Class A(b)(c)		16,230		43,391,230
Facebook, Inc., Class A(b)(c)		73,953		25,098,909
Kakao Corp.		290,958		28,615,171
Kanzhun Ltd., ADR(c)		134,556		4,842,670
Snap, Inc., Class A(b)(c)		296,070		21,870,691
Yandex NV, Class A(b)(c)		195,458		15,576,048
Z Holdings Corp.		2,037,900		13,042,675
ZoomInfo Technologies, Inc., Class A(b)(c)		244,602		14,967,196
				167,404,590
Internet & Direct Marketing Retail — 4.0%
Amazon.com, Inc.(b)(c)		11,198		36,785,878
Delivery Hero SE(c)(f)		95,470		12,177,691
Ensogo Ltd.(c)(e)		173,282		1
Jasper Infotech Private Ltd., Series I, (Acquired 08/18/15, Cost: $1,998,435)(a)(e)		1,054		176,893
MercadoLibre, Inc.(b)(c)		12,473		20,947,156
				70,087,619
IT Services — 16.8%
Accenture PLC, Class A(b)		54,906		17,565,528
Adyen NV(c)(f)		5,007		13,996,376
Automattic, Inc., Series E, (Acquired 02/03/21, Cost: $7,999,945)(a)(e)		94,117		8,896,880
Fiserv, Inc.(b)(c)		116,725		12,664,663

Security	Shares		Value
IT Services (continued)
GMO Payment Gateway, Inc.		92,500	$	11,679,183
Marqeta, Inc., Class A(c)		410,502		9,080,304
Mastercard, Inc., Class A(b)		83,560		29,052,141
MongoDB, Inc.(b)(c)		36,252		17,093,181
Okta, Inc.(b)(c)		75,945		18,024,786
PayPal Holdings, Inc.(b)(c)		125,657		32,697,208
Shopify, Inc., Class A(b)(c)		14,378		19,493,405
Snowflake, Inc., Class A(b)(c)		14,418		4,360,436
Square, Inc., Class A(b)(c)		123,624		29,649,980
Thoughtworks Holding, Inc.(b)(c)		469,678		13,484,455
TRAX Ltd., Series D, (Acquired 02/18/21, Cost: $1,999,989)(a)(e)		38,361		2,133,255
TRAX Ltd., Series E, (Acquired 09/12/19, Cost: $4,000,013)(a)(e)		106,667		5,931,752
Twilio, Inc., Class A(b)(c)		73,502		23,450,813
Visa, Inc., Class A(b)		114,046		25,403,746
				294,658,092
Machinery — 0.1%
Berkshire Grey, Inc.		238,775		1,678,588
Professional Services — 0.7%
Recruit Holdings Co. Ltd.		208,700		12,756,959
Road & Rail — 1.1%
Didi Global, Inc., (Acquired 07/08/21, Cost: $3,016,964)(a)		440,012		3,343,905
Lyft, Inc., Class A(b)(c)		209,319		11,217,405
TuSimple Holdings, Inc., Class A(b)(c)		114,035		4,234,120
				18,795,430
Semiconductors & Semiconductor Equipment — 14.0%
Advanced Micro Devices, Inc.(b)(c)		246,478		25,362,586
Alphawave IP Group PLC(c)		1,604,288		5,014,954
Analog Devices, Inc.(b)		50,378		8,437,307
ASML Holding NV		40,889		30,546,462
Cree, Inc.(b)		—		—
Lam Research Corp.(b)		44,718		25,451,250
Marvell Technology, Inc.(b)		578,677		34,900,010
Monolithic Power Systems, Inc.		36,607		17,742,681
Qualcomm, Inc.(b)		71,083		9,168,285
Renesas Electronics Corp.(c)		1,228,400		15,118,352
Skyworks Solutions, Inc.(b)		58,795		9,688,240
Soitec SA(c)		77,414		16,734,415
STMicroelectronics NV		306,436		13,379,518
Taiwan Semiconductor Manufacturing Co. Ltd., ADR(b)		183,509		20,488,780
Wolfspeed, Inc.		150,470		12,147,443
				244,180,283
Software — 21.0%
Adobe, Inc.(b)(c)		39,042		22,477,260
AppLovin Corp., Class A(b)(c)		167,279		12,105,981
Atlassian Corp. PLC, Class A(b)(c)		48,947		19,158,835
Autodesk, Inc.(b)(c)		49,693		14,170,953
Avalara, Inc.(b)(c)		89,151		15,580,920
C3.AI, Inc., Class A(b)(c)		201,236		9,325,276
Cadence Design Systems, Inc.(b)(c)		105,172		15,927,248
Coupa Software, Inc.(b)(c)		52,482		11,503,005
Crowdstrike Holdings, Inc., Class A(b)(c)		55,778		13,709,117
CS Disco, Inc.(c)		187,702		8,998,434
Databricks, Inc., (Acquired 07/24/20, Cost: $960,476)(a)(e)		19,999		4,408,780
DataRobot, Inc., Series F, (Acquired 03/01/21, Cost: $583,275)(a)(e)		38,789		1,154,749

CONSOLIDATED SCHEDULES OF INVESTMENTS 1

Consolidated Schedule of Investments  (unaudited) (continued) September 30, 2021 BlackRock Science and Technology Trust (BST) (Percentages shown are based on Net Assets)

Security	Shares		Value
Software (continued)
Elastic NV(b)(c)		64,747	$	9,646,655
Freshworks, Inc., Class A(b)(c)		88,217		3,765,984
Intuit, Inc.(b)		31,264		16,867,241
Linklogis, Inc., (Acquired 03/31/21, Cost: $2,624,480)(a)		1,149,000		1,180,778
Microsoft Corp.(b)		226,677		63,904,780
Patreon, Inc., (Acquired 08/19/21, Cost: $3,352,226)(a)(e)		59,524		3,333,344
Paycom Software, Inc.(b)(c)		30,220		14,981,565
salesforce.com, Inc.(b)(c)		60,731		16,471,462
ServiceNow, Inc.(b)(c)		35,960		22,376,829
SiteMinder Ltd., Class A, (Acquired 01/21/20, Cost: $6,160,136)(a)(e)		53,642		6,506,587
Snorkel AI, Inc., (Acquired 06/30/21, Cost: $997,636)(a)(e)		66,422		1,037,512
Snyk Ltd. , (Acquired 09/02/21, Cost: $5,192,307)(a)(e)		361,972		5,190,678
Unity Software, Inc.(b)(c)		113,383		14,314,604
Xero Ltd.(c)		135,671		13,313,192
Zoom Video Communications, Inc., Class A(b)(c)		27,019		7,065,468
Zscaler, Inc.(b)(c)		74,956		19,654,962
				368,132,199
Specialty Retail — 0.6%
Cazoo Group Ltd., (Acquired 10/08/20, Cost: $5,162,370)(a)		1,298,058		9,676,871
Technology Hardware, Storage & Peripherals — 3.6%
Apple, Inc.(b)		450,747		63,780,700
Total Common Stocks — 82.1% (Cost: $625,830,938)				1,437,083,197
Preferred Securities
Preferred Stocks — 12.8%
Diversified Consumer Services — 0.2%
Think & Learn Private Ltd., Series F, (Acquired 09/30/20, Cost: $3,052,975)(a)(e)		1,054		4,047,905
Diversified Financial Services — 2.3%
Databricks, Inc., Series F, (Acquired 10/22/19, Cost: $3,999,999)(a)(e)		93,135		20,531,611
TransferWise
Series A		11,355		4,327,057
Series B		3,261		1,242,671
Series C		1,824		695,073
Series D		504		192,060
Series E		53		20,197
TransferWise (Seed Preferred)		9,603		3,659,422
Trumid Holdings LLC, Class L, (Acquired 09/15/21, Cost: $9,999,695)(a)(e)(g)		11,420		9,999,694
				40,667,785
Electrical Equipment(a)(e) — 0.4%
Credo Technology Group Holding Ltd.
Series D, (Acquired 03/20/20, Cost: $5,000,001)		1,001,382		6,498,969
Series D+, (Acquired 01/22/20, Cost: $404,498)		69,679		452,217
				6,951,186

Security	Shares		Value
Entertainment — 0.4%
Discord, Inc., (Acquired 09/13/21, Cost: $7,000,088)(a)(e)		12,713	$	7,000,088
Food Products(a)(e) — 0.7%
Farmer’s Business Network, Inc.
(Acquired 09/15/21, Cost: $6,999,963)		112,616		7,000,211
Series F, (Acquired 07/31/20, Cost: $2,999,886)		90,750		5,641,020
				12,641,231
Interactive Media & Services — 0.9%
ByteDance Ltd., Series E, (Acquired 11/11/20, Cost: $9,999,959)(a)(e)		91,262		15,309,818
IT Services(a)(e) — 1.6%
Deep Instinct Ltd., Series D-2, (Acquired 03/19/21, Cost: $2,999,391)		493,493		3,405,101
Solugen, Inc., (Acquired 09/02/21, Cost: $9,999,977) .		269,284		10,000,777
Trumid Holdings LLC(g)
Class J-A, (Acquired 07/24/20, Cost: $2,499,716)		5,038		4,411,424
Class J-B, (Acquired 07/24/20, Cost: $1,499,830)		5,038		4,411,424
Voltron Data, Inc., (Acquired 07/14/21, Cost: $5,000,000)		9,090,909		5,000,000
				27,228,726
Road & Rail(a)(e) — 0.8%
Ant Group Co., Ltd, Series C, (Acquired 05/18/18, Cost: $6,492,862)		1,157,373		6,400,273
FlixMobility GmbH, Series F, (Acquired 07/26/19, Cost: $5,482,937)		275		6,421,710
				12,821,983
Semiconductors & Semiconductor Equipment(a)(e) — 2.6%
Innovium, Inc.
Series E, (Acquired 08/21/19, Cost: $3,000,003)		353,478		2,997,494
Series F, (Acquired 06/10/20, Cost: $2,999,996)		296,062		2,984,305
Psiquantum Corp., Series C, (Acquired 09/09/19, Cost: $3,200,234)		690,003		14,110,561
PsiQuantum Corp., Series D, (Acquired 05/21/21, Cost: $5,000,025)		190,650		4,995,030
SambaNova Systems, Inc., Series C, (Acquired 02/20/20, Cost: $9,972,126)		187,300		20,295,828
				45,383,218
Software(a)(e) — 2.9%
Avidxchange, Inc., (Acquired 07/29/20, Cost: $2,022,088)		41,257		3,370,697
Databricks, Inc., Series G, (Acquired 02/01/21, Cost: $4,500,001)		25,371		5,593,037
DataRobot, Inc., Series F, (Acquired 10/27/20, Cost: $2,999,996)		228,276		6,795,776
GitLab, Inc., Series E, (Acquired 09/10/19, Cost: $2,915,501)		156,500		8,998,750
Patreon, Inc., Series D, (Acquired 07/14/21, Cost: $6,666,632)		119,047		6,666,632
Snorkel AI, Inc., Series C, (Acquired 06/30/21, Cost: $4,999,985)		332,896		5,199,835
Snyk, Ltd., (Acquired 09/02/21, Cost: $4,807,688)		335,159		4,806,180

2

Consolidated Schedule of Investments (unaudited) (continued) September 30, 2021 BlackRock Science and Technology Trust (BST) (Percentages shown are based on Net Assets)

Security	Shares		Value
Software (continued)
Unqork, Inc.
Series B, (Acquired 09/19/19, Cost: $3,198,417)		281,080	$	8,297,482
Series C, (Acquired 09/18/20, Cost: $1,303,260)		47,600		1,405,152
				51,133,541
Total Preferred Stocks — 12.8%				223,185,481
Total Preferred Securities — 12.8% (Cost: $143,370,255)				223,185,481
Warrants
IT Services — 0.0%
TRAX Ltd., (Acquired 09/12/19, Cost: $0)(a)(e)		17,065		174,575
Total Warrants — 0.0% (Cost: $ — )				174,575
Total Long-Term Investments — 94.9% (Cost: $769,201,193)				1,660,443,253
Short-Term Securities
Money Market Funds — 6.0%
BlackRock Liquidity Funds, T-Fund, Institutional Class, 0.01%(h)(i)		97,469,011		97,469,011
SL Liquidity Series, LLC, Money Market Series, 0.13%(h)(i)(j)		8,459,902		8,462,440
Total Short-Term Securities — 6.0% (Cost: $105,931,451)				105,931,451
Total Investments Before Options Written — 100.9% (Cost: $875,132,644)				1,766,374,704
Options Written — (0.4)% (Premiums Received: $(13,532,638))				(6,905,512	)
Total Investments, Net of Options Written — 100.5% (Cost: $861,600,006)				1,759,469,192
Liabilities in Excess of Other Assets — (0.5)%				(9,067,190	)
Net Assets — 100.0%			$	1,750,402,002

^(a) Restricted security as to resale, excluding 144A securities. The Trust held restricted securities with a current value of $320,790,945, representing 18.3% of its net assets as of period end, and an original cost of $204,117,628.

^(b) All or a portion of the security has been pledged and/or segregated as collateral in connection with outstanding exchange-traded options written.

^(c) Non-income producing security.

^(d) All or a portion of this security is on loan.

^(e) Security is valued using significant unobservable inputs and is classified as Level 3 in the fair value hierarchy.

^(f)  Security exempt from registration pursuant to Rule 144A under the Securities Act of 1933, as amended. These securities may be resold in transactions exempt from registration to qualified institutional investors.

^(g) All or a portion of the security is held by a wholly-owned subsidiary.

^(h) Affiliate of the Trust.

⁽ⁱ⁾  Annualized 7-day yield as of period end.

^(j)  All or a portion of this security was purchased with the cash collateral from loaned securities.

For Trust compliance purposes, the Trust’s industry classifications refer to one or more of the industry sub-classifications used by one or more widely recognized market indexes or rating group indexes, and/or as defined by the investment adviser. These definitions may not apply for purposes of this report, which may combine such industry sub-classifications for reporting ease.

Affiliates

Investments in issuers considered to be affiliate(s) of the Trust during the period ended September 30, 2021 for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as amended, were as follows:

Affiliated Issuer	Value at 12/31/20		Purchases at Cost			Proceeds from Sales		Net Realized Gain (Loss)		Change in Unrealized Appreciation (Depreciation)		Value at 09/30/21		Shares Held at 09/30/21		Income			Capital Gain Distributions from Underlying Funds
BlackRock Liquidity Funds, T-Fund, Institutional Class	$	9,266,737	$	88,202,274	(a)	$	—	$	—	$	—	$	97,469,011		97,469,011	$	3,987		$	—
SL Liquidity Series, LLC, Money Market Series		—		8,462,440	(a)		—		—		—		8,462,440		8,459,902		316,355	(b)		—
								$	—	$	—	$	105,931,451			$	320,342		$	—

^(a) Represents net amount purchased (sold).

^(b)  All or a portion represents securities lending income earned from the reinvestment of cash collateral from loaned securities, net of fees and collateral investment expenses, and other payments to and from borrowers of securities.

CONSOLIDATED SCHEDULES OF INVESTMENTS 3

Consolidated Schedule of Investments (unaudited) (continued) September 30, 2021 BlackRock Science and Technology Trust (BST)

Derivative Financial Instruments Outstanding as of Period End

Exchange-Traded Options Written

Description	Number of Contracts		Expiration Date		Exercise Price		Notional Amount (000)		Value
Call
Accenture PLC, Class A		96		10/01/21	USD	330.00	USD	3,071	$	(1,920	)
Analog Devices, Inc.		4		10/01/21	USD	170.00	USD	67		(140	)
Cree, Inc.		134		10/01/21	USD	84.00	USD	1,082		(2,010	)
Marvell Technology Inc.		491		10/01/21	USD	60.25	USD	2,961		(27,153	)
MercadoLibre, Inc.		10		10/01/21	USD	1,830.00	USD	1,679		(3,500	)
Okta, Inc.		28		10/01/21	USD	240.00	USD	665		(3,332	)
ServiceNow, Inc.		32		10/01/21	USD	600.00	USD	1,991		(75,040	)
Taiwan Semiconductor Manufacturing Co. Ltd.		38		10/01/21	USD	114.00	USD	424		(361	)
Adobe, Inc.		30		10/08/21	USD	665.00	USD	1,727		(435	)
Amazon.com, Inc.		6		10/08/21	USD	3,575.00	USD	1,971		(609	)
Analog Devices, Inc.		73		10/08/21	USD	175.00	USD	1,223		(4,198	)
Apple, Inc.		160		10/08/21	USD	155.00	USD	2,264		(480	)
Atlassian Corp. PLC, Class A		40		10/08/21	USD	390.00	USD	1,566		(40,600	)
Coupa Software, Inc.		88		10/08/21	USD	250.00	USD	1,929		(2,860	)
Cree, Inc.		152		10/08/21	USD	92.00	USD	1,227		(7,980	)
Crowdstrike Holdings, Inc., Class A		42		10/08/21	USD	285.00	USD	1,032		(567	)
Fiserv, Inc.		160		10/08/21	USD	119.00	USD	1,736		(3,840	)
Lam Research Corp.		43		10/08/21	USD	625.00	USD	2,447		(3,290	)
Lyft, Inc., Class A		94		10/08/21	USD	52.00	USD	504		(22,184	)
Mastercard, Inc., Class A		41		10/08/21	USD	360.00	USD	1,425		(5,740	)
MercadoLibre, Inc.		11		10/08/21	USD	2,100.00	USD	1,847		(880	)
Microsoft Corp.		47		10/08/21	USD	305.00	USD	1,325		(447	)
MongoDB, Inc.		12		10/08/21	USD	415.00	USD	566		(71,100	)
Roku, Inc.		23		10/08/21	USD	385.00	USD	721		(299	)
salesforce.com, Inc.		125		10/08/21	USD	270.00	USD	3,390		(67,187	)
ServiceNow, Inc.		49		10/08/21	USD	675.00	USD	3,049		(1,470	)
Shopify, Inc., Class A		18		10/08/21	USD	1,560.00	USD	2,440		(1,665	)
Snap, Inc., Class A		210		10/08/21	USD	81.22	USD	1,551		(9,453	)
Square, Inc., Class A		44		10/08/21	USD	270.00	USD	1,055		(924	)
Taiwan Semiconductor Manufacturing Co. Ltd.		45		10/08/21	USD	128.00	USD	502		(248	)
Tesla, Inc.		18		10/08/21	USD	755.00	USD	1,396		(73,305	)
Twilio, Inc., Class A		80		10/08/21	USD	380.00	USD	2,552		(3,400	)
Visa, Inc., Class A		70		10/08/21	USD	240.00	USD	1,559		(700	)
Yandex NV, Class A		100		10/08/21	USD	80.00	USD	797		(14,250	)
Zoom Video Communications, Inc., Class A		43		10/08/21	USD	325.00	USD	1,124		(645	)
Activision Blizzard, Inc.		214		10/15/21	USD	82.50	USD	1,656		(9,844	)
Adobe, Inc.		26		10/15/21	USD	620.00	USD	1,497		(3,809	)
Advanced Micro Devices, Inc.		119		10/15/21	USD	110.00	USD	1,225		(12,316	)
Airbnb, Inc., Class A		33		10/15/21	USD	165.00	USD	554		(22,605	)
Alphabet Inc., Class A		14		10/15/21	USD	2,750.00	USD	3,743		(39,130	)
Amazon.com, Inc.		7		10/15/21	USD	3,600.00	USD	2,300		(1,698	)
Analog Devices, Inc.		4		10/15/21	USD	170.00	USD	67		(960	)
Apple, Inc.		53		10/15/21	USD	155.00	USD	750		(742	)
Applovin Corp., Class A		288		10/15/21	USD	85.00	USD	2,084		(13,680	)
Array Technologies, Inc.		807		10/15/21	USD	20.00	USD	1,495		(34,297	)
Atlassian Corp. PLC, Class A		34		10/15/21	USD	360.00	USD	1,331		(119,000	)
Autodesk, Inc.		24		10/15/21	USD	300.00	USD	684		(4,020	)
Avalara, Inc.		44		10/15/21	USD	180.00	USD	769		(15,620	)
C3.AI, Inc., Class A		167		10/15/21	USD	55.00	USD	774		(5,428	)
Cadence Design Systems, Inc.		178		10/15/21	USD	155.00	USD	2,696		(33,820	)
Chegg, Inc.		282		10/15/21	USD	85.00	USD	1,918		(1,410	)
Chegg, Inc.		120		10/15/21	USD	90.00	USD	816		(600	)
Cree, Inc.		123		10/15/21	USD	95.00	USD	993		(1,845	)
Crowdstrike Holdings, Inc., Class A		38		10/15/21	USD	280.00	USD	934		(1,539	)
Elastic NV		114		10/15/21	USD	170.00	USD	1,698		(4,845	)
Facebook, Inc., Class A		42		10/15/21	USD	385.00	USD	1,425		(651	)
Freshworks Inc., Class A		273		10/15/21	USD	50.00	USD	1,165		(11,603	)
Intuit, Inc.		76		10/15/21	USD	560.00	USD	4,100		(33,060	)
Lyft, Inc., Class A		188		10/15/21	USD	52.50	USD	1,007		(47,094	)
Microsoft Corp.		87		10/15/21	USD	295.00	USD	2,453		(12,658	)

4

Consolidated Schedule of Investments (unaudited) (continued) September 30, 2021 BlackRock Science and Technology Trust (BST)

Exchange-Traded Options Written (continued)

Description	Number of Contracts		Expiration Date		Exercise Price		Notional Amount (000)		Value
Call (continued)
MongoDB, Inc.		12		10/15/21	USD	490.00	USD	566	$	(11,760	)
Okta, Inc.		66		10/15/21	USD	280.00	USD	1,566		(1,056	)
Paycom Software, Inc.		47		10/15/21	USD	480.00	USD	2,330		(109,745	)
PayPal Holdings, Inc.		84		10/15/21	USD	280.00	USD	2,186		(6,678	)
Shoals Technologies Group, Inc., Class A		50		10/15/21	USD	35.00	USD	139		(625	)
Shopify, Inc., Class A		9		10/15/21	USD	1,650.00	USD	1,220		(1,013	)
Snap, Inc., Class A		793		10/15/21	USD	80.00	USD	5,858		(75,731	)
Snowflake, Inc., Class A		25		10/15/21	USD	305.00	USD	756		(22,750	)
Square, Inc., Class A		53		10/15/21	USD	270.00	USD	1,271		(3,816	)
Tesla, Inc.		14		10/15/21	USD	755.00	USD	1,086		(64,260	)
Tesla, Inc.		19		10/15/21	USD	760.00	USD	1,473		(80,227	)
Twilio, Inc., Class A		75		10/15/21	USD	390.00	USD	2,393		(2,325	)
Unity Software, Inc.		162		10/15/21	USD	135.00	USD	2,045		(30,375	)
Visa, Inc., Class A		26		10/15/21	USD	240.00	USD	579		(767	)
Zoom Video Communications, Inc., Class A		45		10/15/21	USD	390.00	USD	1,177		(675	)
ZoomInfo Technologies, Inc., Class A		366		10/15/21	USD	65.00	USD	2,240		(38,430	)
Zscaler, Inc.		68		10/15/21	USD	280.00	USD	1,783		(14,960	)
Adobe, Inc.		13		10/22/21	USD	670.00	USD	748		(1,203	)
Amazon.com, Inc.		13		10/22/21	USD	3,575.00	USD	4,271		(9,165	)
Apple, Inc.		278		10/22/21	USD	155.00	USD	3,934		(7,923	)
Coupa Software, Inc.		44		10/22/21	USD	270.00	USD	964		(1,870	)
Fiserv, Inc.		90		10/22/21	USD	118.00	USD	977		(3,960	)
Lyft, Inc., Class A		12		10/22/21	USD	54.00	USD	64		(2,568	)
Mastercard, Inc., Class A		44		10/22/21	USD	365.00	USD	1,530		(11,000	)
Microsoft Corp.		60		10/22/21	USD	305.00	USD	1,692		(5,250	)
MongoDB, Inc.		12		10/22/21	USD	490.00	USD	566		(17,220	)
Okta, Inc.		53		10/22/21	USD	265.00	USD	1,258		(6,413	)
PayPal Holdings, Inc.		40		10/22/21	USD	300.00	USD	1,041		(1,140	)
PayPal Holdings, Inc.		77		10/22/21	USD	290.00	USD	2,004		(4,197	)
Qualcomm, Inc.		91		10/22/21	USD	149.00	USD	1,174		(1,001	)
Roku, Inc.		80		10/22/21	USD	365.00	USD	2,507		(15,480	)
salesforce.com, Inc.		85		10/22/21	USD	265.00	USD	2,305		(96,262	)
Shopify, Inc., Class A		9		10/22/21	USD	1,595.00	USD	1,220		(3,083	)
Snap, Inc., Class A		251		10/22/21	USD	77.00	USD	1,854		(98,517	)
Square, Inc., Class A		112		10/22/21	USD	280.00	USD	2,686		(7,224	)
Tesla, Inc.		28		10/22/21	USD	740.00	USD	2,171		(174,230	)
Visa, Inc., Class A		56		10/22/21	USD	240.00	USD	1,247		(2,744	)
Yandex NV, Class A		230		10/22/21	USD	81.00	USD	1,833		(60,950	)
Zscaler, Inc.		29		10/22/21	USD	285.00	USD	760		(6,873	)
Airbnb, Inc., Class A		41		10/29/21	USD	165.00	USD	688		(36,387	)
Autodesk, Inc.		38		10/29/21	USD	300.00	USD	1,084		(12,920	)
Lyft, Inc., Class A		219		10/29/21	USD	54.00	USD	1,174		(52,560	)
Marvell Technology Inc.		388		10/29/21	USD	62.00	USD	2,340		(60,140	)
PayPal Holdings, Inc.		76		10/29/21	USD	305.00	USD	1,978		(3,420	)
Roku, Inc.		80		10/29/21	USD	370.00	USD	2,507		(20,800	)
Zscaler, Inc.		68		10/29/21	USD	275.00	USD	1,783		(41,310	)
Robinhood Markets, Inc., Class A		462		11/04/21	USD	46.00	USD	1,944		(59,032	)
Activision Blizzard, Inc.		169		11/05/21	USD	82.00	USD	1,308		(31,563	)
Adobe, Inc.		23		11/05/21	USD	656.00	USD	1,324		(3,013	)
Advanced Micro Devices, Inc		467		11/05/21	USD	112.00	USD	4,805		(121,420	)
Alphabet Inc., Class A		12		11/05/21	USD	2,825.00	USD	3,208		(53,949	)
Amazon.com, Inc.		8		11/05/21	USD	3,470.00	USD	2,628		(40,800	)
Apple, Inc.		235		11/05/21	USD	148.00	USD	3,325		(58,045	)
Arrival SA		280		11/05/21	USD	13.00	USD	368		(35,700	)
Autodesk, Inc.		37		11/05/21	USD	305.00	USD	1,055		(11,933	)
Coupa Software, Inc.		30		11/05/21	USD	255.00	USD	658		(7,125	)
Crowdstrike Holdings, Inc., Class A		42		11/05/21	USD	270.00	USD	1,032		(16,485	)
Intuit, Inc.		20		11/05/21	USD	580.00	USD	1,079		(8,900	)
Lam Research Corp.		69		11/05/21	USD	600.00	USD	3,927		(121,017	)
Marvell Technology Inc.		602		11/05/21	USD	65.00	USD	3,631		(35,518	)
Mastercard, Inc., Class A		41		11/05/21	USD	370.00	USD	1,425		(16,912	)
MercadoLibre, Inc.		12		11/05/21	USD	1,900.00	USD	2,015		(35,340	)

CONSOLIDATED SCHEDULES OF INVESTMENTS 5

Consolidated Schedule of Investments (unaudited) (continued) September 30, 2021 BlackRock Science and Technology Trust (BST)

Exchange-Traded Options Written (continued)

Description	Number of Contracts		Expiration Date		Exercise Price		Notional Amount (000)		Value
Call (continued)
Microsoft Corp.		77		11/05/21	USD	305.00	USD	2,171	$	(16,555	)
MongoDB, Inc.		13		11/05/21	USD	470.00	USD	613		(39,452	)
Qualcomm, Inc.		129		11/05/21	USD	142.00	USD	1,664		(12,190	)
Shopify, Inc., Class A		9		11/05/21	USD	1,545.00	USD	1,220		(16,785	)
Shopify, Inc., Class A		9		11/05/21	USD	1,470.00	USD	1,220		(30,150	)
Skyworks Solutions, Inc.		84		11/05/21	USD	180.00	USD	1,384		(16,002	)
Snap, Inc., Class A		186		11/05/21	USD	81.00	USD	1,374		(60,450	)
Square, Inc., Class A		123		11/05/21	USD	265.00	USD	2,950		(62,730	)
Taiwan Semiconductor Manufacturing Co. Ltd.		186		11/05/21	USD	117.00	USD	2,077		(36,549	)
Twilio, Inc., Class A		72		11/05/21	USD	345.00	USD	2,297		(61,561	)
Visa, Inc., Class A		29		11/05/21	USD	235.00	USD	646		(7,439	)
Yandex NV, Class A		102		11/05/21	USD	80.00	USD	813		(34,532	)
Zoom Video Communications, Inc., Class A		60		11/05/21	USD	290.00	USD	1,569		(24,300	)
Zscaler, Inc.		67		11/05/21	USD	280.00	USD	1,757		(38,692	)
Marqeta, Inc., Class A		750		11/08/21	USD	33.00	USD	1,659		(10,182	)
Monolithic Power Systems, Inc.		113		11/08/21	USD	499.00	USD	5,477		(196,006	)
Facebook, Inc., Class A		38		11/11/21	USD	366.00	USD	1,290		(20,437	)
Apple, Inc.		109		11/12/21	USD	149.50	USD	1,542		(24,446	)
Accenture PLC, Class A		74		11/19/21	USD	345.00	USD	2,367		(14,245	)
Activision Blizzard, Inc.		98		11/19/21	USD	80.00	USD	758		(28,273	)
Adobe, Inc.		29		11/19/21	USD	635.00	USD	1,670		(13,775	)
Advanced Micro Devices, Inc.		178		11/19/21	USD	105.00	USD	1,832		(102,795	)
Airbnb, Inc., Class A		41		11/19/21	USD	175.00	USD	688		(30,955	)
Alphabet Inc., Class A		6		11/19/21	USD	2,875.00	USD	1,604		(23,160	)
Analog Devices, Inc.		75		11/19/21	USD	180.00	USD	1,256		(14,437	)
Apple, Inc.		66		11/19/21	USD	155.00	USD	934		(9,042	)
Applovin Corp., Class A		230		11/19/21	USD	85.00	USD	1,665		(56,925	)
Arrival SA		280		11/19/21	USD	15.00	USD	368		(25,200	)
Atlassian Corp. PLC, Class A		77		11/19/21	USD	400.00	USD	3,014		(186,058	)
Autodesk, Inc.		55		11/19/21	USD	300.00	USD	1,568		(33,550	)
Avalara, Inc.		117		11/19/21	USD	190.00	USD	2,045		(66,690	)
Cadence Design Systems, Inc.		150		11/19/21	USD	170.00	USD	2,272		(22,500	)
Chegg, Inc.		104		11/19/21	USD	85.00	USD	707		(6,240	)
Cree, Inc.		57		11/19/21	USD	92.50	USD	460		(11,258	)
Crowdstrike Holdings, Inc., Class A		8		11/19/21	USD	280.00	USD	197		(2,860	)
Crowdstrike Holdings, Inc., Class A		42		11/19/21	USD	270.00	USD	1,032		(23,835	)
Elastic NV		86		11/19/21	USD	180.00	USD	1,281		(10,320	)
Facebook, Inc., Class A		67		11/19/21	USD	375.00	USD	2,274		(30,150	)
Fiserv, Inc.		111		11/19/21	USD	120.00	USD	1,204		(10,656	)
Lam Research Corp.		26		11/19/21	USD	650.00	USD	1,480		(18,265	)
Lyft, Inc., Class A		135		11/19/21	USD	57.50	USD	723		(30,442	)
Marqeta, Inc., Class A		750		11/19/21	USD	35.00	USD	1,659		(11,250	)
Marvell Technology Inc.		312		11/19/21	USD	65.00	USD	1,882		(36,972	)
Mastercard, Inc., Class A		41		11/19/21	USD	375.00	USD	1,425		(16,912	)
MercadoLibre, Inc.		5		11/19/21	USD	1,880.00	USD	840		(22,450	)
Microsoft Corp.		47		11/19/21	USD	300.00	USD	1,325		(20,210	)
MongoDB, Inc.		63		11/19/21	USD	500.00	USD	2,971		(121,275	)
Okta, Inc.		88		11/19/21	USD	270.00	USD	2,089		(26,180	)
Paycom Software, Inc.		47		11/19/21	USD	480.00	USD	2,330		(178,130	)
PayPal Holdings, Inc.		112		11/19/21	USD	280.00	USD	2,914		(55,440	)
Robinhood Markets, Inc., Class A		462		11/19/21	USD	46.00	USD	1,944		(80,850	)
Roku, Inc.		76		11/19/21	USD	365.00	USD	2,381		(61,180	)
ServiceNow, Inc.		30		11/19/21	USD	660.00	USD	1,867		(48,000	)
Shoals Technologies Group, Inc., Class A		197		11/19/21	USD	40.00	USD	549		(5,910	)
Shopify, Inc., Class A		25		11/19/21	USD	1,550.00	USD	3,389		(64,125	)
Skyworks Solutions, Inc.		98		11/19/21	USD	185.00	USD	1,615		(17,493	)
Snap, Inc., Class A		165		11/19/21	USD	85.00	USD	1,219		(45,787	)
Snowflake, Inc., Class A		19		11/19/21	USD	325.00	USD	575		(17,860	)
Square, Inc., Class A		51		11/19/21	USD	280.00	USD	1,223		(19,380	)
Taiwan Semiconductor Manufacturing Co. Ltd.		299		11/19/21	USD	120.00	USD	3,338		(47,541	)
Thoughtworks Holding Inc.		395		11/19/21	USD	35.00	USD	1,134		(37,525	)
TuSimple Holdings, Inc.		207		11/19/21	USD	55.00	USD	769		(20,182	)

6

Consolidated Schedule of Investments (unaudited) (continued) September 30, 2021 BlackRock Science and Technology Trust (BST)

Exchange-Traded Options Written (continued)

Description	Number of Contracts		Expiration Date		Exercise Price		Notional Amount (000)		Value
Call (continued)
Unity Software, Inc.		132		11/19/21	USD	135.00	USD	1,667	$	(89,760	)
Unity Software, Inc.		58		11/19/21	USD	140.00	USD	732		(30,450	)
Visa, Inc., Class A		45		11/19/21	USD	240.00	USD	1,002		(10,013	)
Yandex NV, Class A		173		11/19/21	USD	80.00	USD	1,379		(65,740	)
ZoomInfo Technologies, Inc., Class A		384		11/19/21	USD	66.35	USD	2,350		(95,152	)
Microsoft Corp.		135		12/17/21	USD	305.00	USD	3,806		(65,475	)
Shoals Technologies Group, Inc., Class A		107		12/17/21	USD	35.00	USD	298		(12,572	)
									$	(5,576,144	)

OTC Options Written

Description	Counterparty	Number of Contracts		Expiration Date		Exercise Price			Notional Amount (000)			Value
Call
GMO Payment Gateway Inc.	Goldman Sachs International		17,500		10/05/21		JPY	13,384.63		JPY	248,150	$	(108,503)
Xero Ltd.	UBS AG		18,300		10/05/21		AUD	146.37		AUD	2,544		(629	)
Yahoo Japan Corp.	Goldman Sachs International		335,000		10/05/21		JPY	704.77		JPY	240,430		(70,721	)
Shoals Technologies Group, Inc., Class A	Citibank N.A.		21,400		10/06/21		USD	29.96		USD	597		(4,827	)
Adyen NV	Goldman Sachs International		1,800		10/07/21		EUR	2,433.72		EUR	4,347		(68,983	)
Soitec SA	UBS AG		4,900		10/07/21		EUR	198.08		EUR	921		(3,326	)
Avalara, Inc.	Citibank N.A.		8,300		10/08/21		USD	175.00		USD	1,451		(34,634	)
Delivery Hero AG	Goldman Sachs International		7,000		10/13/21		EUR	132.03		EUR	773		(670	)
Samsung SDI Co. Ltd.	JPMorgan Chase Bank N.A.		8,000		10/13/21		USD	834,080.00		USD	5,744,000		(149	)
TuSimple Holdings, Inc.	Citibank N.A.		21,000		10/13/21		USD	35.25		USD	780		(78,191	)
Recruit Holdings Co. Ltd.	UBS AG		40,100		10/14/21		JPY	6,639.38		JPY	273,963		(124,242	)
STMicroelectronics NV	Goldman Sachs International		32,400		10/14/21		EUR	38.88		EUR	1,224		(19,110	)
Kakao Corp.	Morgan Stanley & Co. International PLC		14,100		10/19/21		USD	151,994.56		USD	1,663,800		(207	)
Soitec SA	UBS AG		4,200		10/19/21		EUR	206.82		EUR	789		(1,511	)
Yahoo Japan Corp.	Goldman Sachs International		335,000		10/19/21		JPY	704.77		JPY	240,430		(99,415	)
ASML Holding NV	Goldman Sachs International		12,700		10/26/21		EUR	744.07		EUR	8,203		(21,935	)
Soitec SA	Morgan Stanley & Co. International PLC		3,900		10/27/21		EUR	211.12		EUR	733		(4,206	)
Delivery Hero AG	UBS AG		22,600		10/29/21		EUR	135.34		EUR	2,496		(13,092	)
Renesas Electronics Corp.	JPMorgan Chase Bank N.A.		245,600		10/29/21		JPY	1,424.80		JPY	342,858		(88,900	)
Soitec SA	UBS AG		3,800		10/29/21		EUR	217.74		EUR	714		(2,472	)
Array Technologies, Inc.	Barclays Bank PLC		62,400		11/01/21		USD	19.28		USD	1,156		(81,843	)
Avalara, Inc.	Citibank N.A.		14,600		11/02/21		USD	179.05		USD	2,552		(106,805	)
GMO Payment Gateway Inc.	JPMorgan Chase Bank N.A.		11,200		11/02/21		JPY	16,068.00		JPY	158,816		(3,897	)
Recruit Holdings Co. Ltd.	JPMorgan Chase Bank N.A.		24,600		11/02/21		JPY	7,231.12		JPY	168,067		(22,178	)
STMicroelectronics NV	Credit Suisse International		62,000		11/02/21		EUR	41.19		EUR	2,341		(32,197	)
C3.AI, Inc., Class A	Morgan Stanley & Co. International PLC		45,600		11/03/21		USD	53.54		USD	2,113		(55,317	)
Shoals Technologies Group, Inc., Class A	Citibank N.A.		19,700		11/03/21		USD	35.14		USD	549		(7,196	)
Snap, Inc., Class A	Goldman Sachs International		2,300		11/03/21		USD	76.15		USD	170		(10,391	)
TuSimple Holdings, Inc.	Citibank N.A.		21,000		11/03/21		USD	38.50		USD	780		(74,918	)
Shoals Technologies Group, Inc., Class A	Bank of America N.A.		10,700		11/05/21		USD	32.36		USD	298		(9,393	)
Chegg, Inc.	BNP Paribas SA		22,500		11/08/21		USD	84.31		USD	1,530		(8,620	)
Shoals Technologies Group, Inc., Class A	Citibank N.A.		19,800		11/09/21		USD	36.47		USD	552		(7,841	)
Kakao Corp.	Morgan Stanley & Co. International PLC		44,000		11/10/21		USD	125,931.97		USD	5,192,000		(136,052	)
Soitec SA	UBS AG		3,550		11/10/21		EUR	191.77		EUR	667		(26,997	)
												$	(1,329,368	)

CONSOLIDATED SCHEDULES OF INVESTMENTS 7

Consolidated Schedule of Investments  (unaudited) (continued) September 30, 2021 BlackRock Science and Technology Trust (BST)

Fair Value Hierarchy as of Period End

Various inputs are used in determining the fair value of financial instruments. These inputs to valuation techniques are categorized into a fair value hierarchy consisting of three broad levels for financial reporting purposes as follows:

• Level 1 – Unadjusted price quotations in active markets/exchanges for identical assets or liabilities that the Trust has the ability to access;

• Level 2 – Other observable inputs (including, but not limited to, quoted prices for similar assets or liabilities in markets that are active, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or other market–corroborated inputs); and

• Level 3 – Unobservable inputs based on the best information available in the circumstances, to the extent observable inputs are not available (including the BlackRock Global Valuation Methodologies Committee’s (the “Global Valuation Committee’s”) assumptions used in determining the fair value of financial instruments).

The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (Level 1 measurements) and the lowest priority to unobservable inputs (Level 3 measurements). Accordingly, the degree of judgment exercised in determining fair value is greatest for instruments categorized in Level 3. The inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, for disclosure purposes, the fair value hierarchy classification is determined based on the lowest level input that is significant to the fair value measurement in its entirety. Investments classified within Level 3 have significant unobservable inputs used by the Global Valuation Committee in determining the price for Fair Valued Investments. Level 3 investments include equity or debt issued by privately held companies or funds. There may not be a secondary market, and/or there are a limited number of investors. The categorization of a value determined for financial instruments is based on the pricing transparency of the financial instruments and is not necessarily an indication of the risks associated with investing in those securities. For information about the Trust’s policy regarding valuation of financial instruments, refer to its most recent financial statements.

Certain investments of the Trust were fair valued using net asset value (“NAV”) per share as no quoted market value is available and therefore have been excluded from the fair value hierarchy.

The following table summarizes the Trust’s financial instruments categorized in the fair value hierarchy. The breakdown of the Trust’s financial instruments into major categories is disclosed in the Consolidated Schedule of Investments above.

	Level 1		Level 2		Level 3		Total
Assets
Investments
Long-Term Investments
Common Stocks
Airlines	$	—	$	3,398,315	$	—	$	3,398,315
Automobiles		29,460,669		10,980,421		—		40,441,090
Banks		—		—		36,387,653		36,387,653
Capital Markets		7,084,589		—		—		7,084,589
Diversified Consumer Services		9,042,511		—		3,828,996		12,871,507
Diversified Financial Services		—		10,649,020		—		10,649,020
Electrical Equipment		13,974,321		—		—		13,974,321
Electronic Equipment, Instruments & Components		—		14,767,026		—		14,767,026
Entertainment		40,109,322		—		—		40,109,322
Hotels, Restaurants & Leisure		6,249,023		—		—		6,249,023
Interactive Media & Services		125,746,744		41,657,846		—		167,404,590
Internet & Direct Marketing Retail		57,733,034		12,177,691		176,894		70,087,619
IT Services		252,020,646		25,675,559		16,961,887		294,658,092
Machinery		—		1,678,588		—		1,678,588
Professional Services		—		12,756,959		—		12,756,959
Road & Rail		15,451,525		3,343,905		—		18,795,430
Semiconductors & Semiconductor Equipment		168,401,536		75,778,747		—		244,180,283
Software		332,006,579		14,493,970		21,631,650		368,132,199
Specialty Retail		—		9,676,871		—		9,676,871
Technology Hardware, Storage & Peripherals		63,780,700		—		—		63,780,700
Preferred Securities
Preferred Stocks		—		10,136,480		213,049,001		223,185,481
Warrants		—		—		174,575		174,575
Short-Term Securities
Money Market Funds		97,469,011		—		—		97,469,011
Unfunded SPAC PIPE Commitments(a)		—		—		—		—
	$	1,218,530,210	$	247,171,398	$	292,210,656		1,757,912,264
Investments Valued at NAV(b)								8,462,440
							$	1,766,374,704

8

Consolidated Schedule of Investments  (unaudited) (continued) September 30, 2021 BlackRock Science and Technology Trust (BST)

Fair Value Hierarchy as of Period End (continued)

	Level 1			Level 2			Level 3		Total
Derivative Financial Instruments(c)
Liabilities
Equity Contracts	$	(5,131,270	)	$	(1,774,242	)	$	—	$	(6,905,512	)

^(a)  Unfunded SPAC PIPE commitments are valued at the unrealized appreciation (depreciation) on the commitment.

^(b) Certain investments of the Trust were fair valued using NAV per share as no quoted market value is available and therefore have been excluded from the fair value hierarchy.

^(c) Derivative financial instruments are options written. Options written are shown at value.

A reconciliation of Level 3 financial instruments is presented when the Trust had a significant amount of Level 3 investments at the beginning and/or end of the period in relation to net assets. The following table is a reconciliation of Level 3 investments for which significant unobservable inputs were used in determining fair value:

	Common Stocks			Preferred Stocks			Unfunded SPAC PIPE commitments		Warrants			Total
Assets
Opening balance, as of December 31, 2020	$	37,043,595		$	124,970,280		$	—	$	189,763		$	162,203,638
Transfers into Level 3.		—			—			—		—			—
Transfers out of Level 3		(4,108,753	)		(3,910,998	)		—		—			(8,019,751	)
Accrued discounts/premiums		—			—			—		—			—
Net realized gain (loss)		—			4,698,017			—		—			4,698,017
Net change in unrealized appreciation (depreciation)(a)		27,341,088			39,789,398			—		(15,188	)		67,115,298
Purchases		20,125,378			77,973,404			—		—			98,098,782
Sales		(1,414,228	)		(30,471,100	)		—		—			(31,885,328	)
Closing balance, as of September 30, 2021.	$	78,987,080		$	213,049,001		$	—	$	174,575		$	292,210,656
Net change in unrealized appreciation (depreciation) on investments still held at September 30, 2021(a)	$	27,423,047		$	57,500,636		$	—	$	(15,188	)	$	84,908,495

(a) Any difference between net change in unrealized appreciation (depreciation) and net change in unrealized appreciation (depreciation) on investments still held at September 30, 2021 is generally due to investments no longer held or categorized as Level 3 at period end.

The following table summarizes the valuation approaches used and unobservable inputs utilized by the BlackRock Global Valuation Methodologies Committee (the “Global Valuation Committee”) to determine the value of certain of the Trust’s Level 3 financial instruments as of period end.

	Value		Valuation Approach		Unobservable Inputs		Range of Unobservable Inputs Utilized (a)		Weighted Average of Unobservable Inputs Based on Fair Value
Assets
Common Stocks(b)(c)	$	78,987,080		Market		Revenue Multiple		7.50x - 34.85x		23.15x
						Volatility		32% -32%		32%
						Time to Exit		0.5-0.5		0.5
						Recent Transactions	$	14.34$3,840.52	$	792.67
Preferred Stocks(d)(e)		213,049,001		Income		Discount Rate		14% - 40%		32%
						Exit Multiple		9.50x		—
				Market		Revenue Multiple		4.25x - 40.00x		20.57x
						Volatility		50% - 50%		50%
						Time to Exit		4.0 - 4.0		4.0
						Recent Transactions		0.55 - $3840.52		589.71
Warrants(f)		174,575		Market		Recent Multiple		12.00x		—
						Volatility		32%		—

CONSOLIDATED SCHEDULES OF INVESTMENTS 9

Consolidated Schedule of Investments  (unaudited) (continued) September 30, 2021 BlackRock Science and Technology Trust (BST)

Value		Valuation Approach	Unobservable Inputs		Range of Unobservable Inputs Utilized (a)		Weighted Average of Unobservable Inputs Based on Fair Value
				Time to Exit		0.5		—
$	292,210,656

^(a)  A significant change in unobservable input would have resulted in a correlated (inverse) significant change to value.

^(b) For the period end September 30, 2021, the valuation technique for investments classified as Common Stocks amounting to $5,931,752 changed to Current Value Method. The investments were previously valued utilizing Transaction Price approach. The change was due to consideration of the information that was available at the time the investments were valued.

^(c) For the period end September 30, 2021, the valuation technique for investments classified as Common Stocks amounting to $6,506,587 changed to Transaction Price approach. The investments were previously valued utilizing Current Value Method. The change was due to consideration of the information that was available at the time the investments were valued.

^(d) For the period end September 30, 2021, the valuation technique for investments classified as Preferred Stocks amounting to $29,056,780 changed to Current Value Method. The investments were previously valued utilizing Transaction Price Approach. The change was due to consideration of the information that was available at the time the investments were valued.

^(e) For the period end September 30, 2021, the valuation technique for investments classified as Preferred Stocks amounting to $24,804,341 changed to Transaction Price approach. The investments were previously valued utilizing Current Value Method. The change was due to consideration of the information that was available at the time the investments were valued.

^(f) For the period end September 30, 2021, the valuation technique for investments classified as Warrants amounting to $174,575 changed to Current Value Method. The investments were previously valued utilizing Transaction Price Approach. The change was due to consideration of the information that was available at the time the investments were valued.

Currency Abbreviation

AUD	Australian Dollar
EUR	Euro
JPY	Japanese Yen
USD	United States Dollar

Portfolio Abbreviation

ADR	American Depositary Receipt
PIPE	Private Investment in Public Equity
SPAC	Special Purpose Acquisition Company

10