NPORT-EX 2 NPORT_89BL_6142135750.htm

BlackRock Science and Technology Trust II

Consolidated Schedule of Investments  (unaudited) March 31, 2021 BlackRock Science and Technology Trust II (BSTZ) (Percentages shown are based on Net Assets)

Security		Shares				Value
Common Stocks
Automobiles — 4.5%
Arrival Group, (Acquired 03/23/21, Cost: $20,182,401)(a)			2,783,376			$	42,540,469
Tesla, Inc.(b)(c)			101,933				68,084,109
XPeng, Inc., ADR(c)			673,810				24,600,803
							135,225,381
Capital Markets — 0.2%
Dragoneer Growth Opportunities Corp., Class A(c)			675,136				6,852,630
Diversified Consumer Services — 1.0%
Chegg, Inc.(c)			356,167				30,509,265
Diversified Financial Services — 0.3%
Linklogis, Inc., Class B, (Acquired 03/31/21, Cost: $8,528,989)(a)			3,734,000				8,528,989
Diversified Telecommunication Services — 0.6%
Bandwidth, Inc., Class A(c)			133,349				16,900,652
Electrical Equipment — 0.4%
Shoals Technologies Group, Inc., Class A(c)			363,842				12,654,425
Electronic Equipment, Instruments & Components — 1.4%
Samsung SDI Co. Ltd			73,213				43,050,851
Entertainment — 3.1%
Big Hit Entertainment Co. Ltd.(c)			114,190				24,659,916
NCSoft Corp.			18,088				13,980,994
Roku, Inc.(b)(c)			102,250				33,309,983
Zynga, Inc., Class A(c)			2,029,787				20,724,125
							92,675,018
Interactive Media & Services — 5.4%
Eventbrite, Inc., Class A(c)			678,986				15,046,330
Kakao Corp.			153,473				67,739,917
Snap, Inc., Class A(b)(c)			1,017,684				53,214,696
ZoomInfo Technologies, Inc., Class A(c)			489,164				23,920,120
							159,921,063
Internet & Direct Marketing Retail(c) — 6.1%
Delivery Hero SE(d)			245,099				31,769,039
Farfetch Ltd., Class A			1,014,685				53,798,599
MercadoLibre, Inc.(b)			26,258				38,655,452
Ozon Holdings PLC, ADR			578,440				32,433,131
Shop Apotheke Europe NV(d)			113,352				24,710,297
							181,366,518
IT Services — 18.7%
Adyen NV(c)(d)			14,925				33,303,706
Endava PLC, ADR(c)			336,360				28,486,328
GDS Holdings Ltd., ADR(c)			199,953				16,214,189
GMO Payment Gateway, Inc.			225,400				29,950,484
Grid Dynamics Holdings, Inc.(c)			1,077,038				17,157,215
Kingsoft Cloud Holdings Ltd., ADR(c)			548,040				21,548,933
Klarna Holdings AB, (Acquired 08/07/19, Cost: $23,354,997)(a)(e)			86,839				101,002,185
Locaweb Servicos de Internet SA(d)			12,026,272				48,821,709
MongoDB, Inc.(c)			72,741				19,453,126
Okta, Inc.(c)			135,151				29,791,335
Pagseguro Digital Ltd., Class A(c)			401,729				18,600,053
Shift4 Payments, Inc., Class A(c)			257,267				21,098,467
Square, Inc., Class A(c)			287,730				65,329,096
StoneCo Ltd., Class A(c)			409,233				25,053,244

Security		Shares				Value
IT Services (continued)
Twilio, Inc., Class A(c)			168,780			$	57,513,473
Wix.com Ltd.(c)			81,585				22,780,164
							556,103,707
Multi-line Retail — 0.9%
Magazine Luiza SA.			7,387,362				26,564,133
Professional Services — 0.5%
CoStar Group, Inc.(b)(c)			18,043				14,829,361
Road & Rail — 1.0%
Lyft, Inc., Class A(c)			474,593				29,984,786
Semiconductors & Semiconductor Equipment — 12.6%
ACM Research, Inc., Class A(c)			276,940				22,373,983
ASMedia Technology, Inc.			329,000				17,366,849
BE Semiconductor Industries NV			263,055				21,973,700
Cohu, Inc.(c)			24,862				1,040,226
Cree, Inc.(c)			330,702				35,758,807
Inphi Corp.(c)			251,146				44,806,958
Lasertec Corp.			320,100				42,272,849
Lattice Semiconductor Corp.(c)			501,236				22,565,645
Marvell Technology Group Ltd.			727,534				35,634,615
Monolithic Power Systems, Inc.(b)			90,245				31,875,436
Qorvo, Inc.(c)			161,063				29,426,211
Silergy Corp.			418,000				34,477,294
SOITEC SA(c)			174,887				35,699,391
							375,271,964
Software — 21.0%
Altium Ltd.			908,430				18,360,299
Atlassian Corp. PLC, Class A(c)			98,985				20,862,079
Avalara, Inc.(c)			174,177				23,240,437
C3.AI, Inc., Class A, (Acquired 12/08/20, Cost: $19,912,170)(a)			658,667				42,592,723
C3.AI, Inc., Class A(c)(f)			229,709				15,140,120
Cloudflare, Inc., Class A(c)			252,090				17,711,843
Coupa Software, Inc.(c)			77,061				19,610,483
Crowdstrike Holdings, Inc., Class A(c)			147,993				27,010,202
Databricks, Inc., (Acquired 07/24/20, Cost: $5,501,686)(a)(e)			114,553				18,219,655
Elastic NV(c)			170,979				19,012,865
Five9, Inc.(c)			198,189				30,982,886
Freee KK(c)			353,900				30,235,546
Kingdee International Software Group Co. Ltd.			8,008,000				25,112,995
Lightspeed POS, Inc.(c)			651,145				40,948,507
Ming Yuan Cloud Group Holdings Ltd.(c)			5,110,000				23,613,817
Rakus Co. Ltd.			1,236,700				23,989,932
RingCentral, Inc., Class A(c)			92,554				27,569,986
Snorkel Al, Inc., Series B, (Acquired 10/13/20, Cost: $2,017,593)(a)(e)			500,250				2,016,008
Snyk Ltd., (Acquired 11/02/20, Cost: $9,287,400)(a)(e)			1,267,643				10,479,098
Synopsys, Inc.(c)			105,146				26,053,076
Trade Desk, Inc., Class A(b)(c)			29,124				18,978,946
TUYA, Inc., ADR(c)			271,975				5,749,552
Unity Software, Inc.(c)			235,581				23,631,130
Weimob, Inc.(c)(d)			13,113,000				29,641,348
Xero Ltd.(c)			256,014				24,778,547
Zendesk, Inc.(c)			199,245				26,423,872
Zscaler, Inc.(c)			189,247				32,488,032
							624,453,984

CONSOLIDATED SCHEDULE OF INVESTMENTS 1

Consolidated Schedule of Investments  (unaudited) (continued) March 31, 2021 BlackRock Science and Technology Trust II (BSTZ) (Percentages shown are based on Net Assets)

Security		Shares				Value
Specialty Retail — 0.4%
Cazoo Ltd., (Acquired 10/08/20, Cost: $5,656,927)(a)(e)			411,705			$	12,600,191
Total Common Stocks — 78.1% (Cost: $1,041,723,399)							2,327,492,918
Preferred Securities
Preferred Stocks — 20.2%(a)(e)
Communications Equipment — 0.6%
Astranis Space Technologies Corp., Series C, (Acquired 03/19/21, Cost: $17,000,010)			775,515				16,999,289
Diversified Consumer Services — 1.0%
Think & Learn Private Ltd. (Acquired 09/30/20, Cost: $7,113,729)			4,651				15,097,725
Series F, (Acquired 09/30/20, Cost: $14,251,080)			4,920				15,970,932
							31,068,657
Electrical Equipment — 0.8%
Credo Technology Group Holding Ltd.
Series D, (Acquired 03/20/20, Cost: $19,999,997)			4,005,527				23,272,112
Series D+, (Acquired 01/22/20, Cost: $1,617,982)			278,714				1,619,328
							24,891,440
Food & Staples Retailing — 0.3%
GrubMarket, Inc. , Series D, (Acquired 07/23/20, Cost: $8,000,001)			1,762,969				8,003,879
Food Products — 0.5%
Farmer’s Business Network, Inc., Series F, (Acquired 07/31/20, Cost: $11,961,002)			361,834				13,865,479
Interactive Media & Services — 0.2%
ResearchGate GmbH, Series D, (Acquired 09/24/20, Cost: $6,999,988)			424,688				6,841,724
IT Services — 3.1%
Automattic, Inc., Series E, (Acquired 02/03/21, Cost: $34,000,000)			400,000				34,000,000
Deep Instinct Ltd., Series D-2, (Acquired 03/19/21, Cost: $12,000,008)			1,974,374				12,000,008
TRAX Ltd.
Series D, (Acquired 02/18/21, Cost: $9,999,998)			191,806				10,150,374
Series E, (Acquired 09/12/19, Cost: $10,999,987)			293,333				15,523,182
Trumid Holdings LLC(g)
Class J-A, (Acquired 07/24/20, Cost: $9,999,857)			20,154				10,177,770
Class J-B, (Acquired 07/24/20, Cost: $5,999,914)			20,154				10,177,770
							92,029,104
Road & Rail — 0.3%
FlixMobility GmbH, Series F, (Acquired 07/26/19, Cost: $16,947,253)			850				9,548,299
Semiconductors & Semiconductor Equipment — 4.2%
Cnex Labs, Inc.
Series E, (Acquired 02/06/20, Cost: $7,000,000)			329,675				5,020,950
Series F, (Acquired 02/24/21, Cost: $4,999,999)			730,332				4,999,999
Innovium, Inc.
Series E, (Acquired 08/21/19, Cost: $8,999,992)			1,060,432				10,286,190
Series F, (Acquired 06/10/20, Cost: $6,999,998)			690,812				7,488,402

Security		Shares				Value
Semiconductors & Semiconductor Equipment (continued)
Mythic AI Inc. series C, (Acquired 01/26/21, Cost: $7,000,000)			1,018,908			$	6,979,520
Nuvia, Inc., Series B, (Acquired 09/17/20, Cost: $12,000,000)			3,741,410				30,829,219
Psiquantum Corp., Series C, (Acquired 09/09/19, Cost: $9,101,310)			1,962,335				9,242,598
SambaNova Systems, Inc., Series C, (Acquired 02/20/20, Cost: $33,904,162)			636,800				49,523,936
							124,370,814
Software — 6.7%
Avidxchange, Inc., (Acquired 07/29/20, Cost: $7,474,330)			152,500				8,242,626
Databricks, Inc.
Series F, (Acquired 10/22/19, Cost: $13,200,019)			307,346				48,883,381
Series G, (Acquired 02/01/21, Cost: $18,500,004)			104,303				16,589,392
DataRobot, Inc.
Series F, (Acquired 10/27/20, Cost: $11,499,999)			875,059				11,830,798
Series F, (Acquired 03/01/21, Cost: $1,384,813)			92,093				1,245,097
GitLab, Inc., Series E, (Acquired 09/10/19, Cost: $11,670,984)			626,482				25,416,375
Online Ventures Pty Ltd., Series C, (Acquired 01/21/20, Cost: $20,875,811)			181,785				24,796,853
Rapyd Financial Network Ltd., Series E, (Acquired 03/31/21, Cost: $13,999,978)			190,705				13,999,978
Snorkel Al, Inc., Series B, (Acquired 10/13/20, Cost: $999,996)			247,943				999,210
Snyk Ltd. , (Acquired 11/02/20, Cost: $13,212,590)			2,663,936				22,021,693
Unqork, Inc.
Series B, (Acquired 09/19/19, Cost: $6,801,016)			14,942				16,364,180
Series C, (Acquired 09/18/20, Cost: $7,994,787)			7,300				7,994,814
							198,384,397
Specialty Retail — 1.1%
Cazoo Ltd.
Series A, (Acquired 10/08/20, Cost: $184,683)			13,441				411,361
Series B, (Acquired 10/08/20, Cost: $3,233,326)			235,318				7,201,884
Series C, (Acquired 10/08/20, Cost: $65,637)			4,777				146,200
Series D, (Acquired 10/08/20, Cost: $11,550,639)			840,643				25,727,796
							33,487,241
Technology Hardware, Storage & Peripherals — 1.4%
ByteDance Ltd., Series E-1, (Acquired 11/11/20, Cost: $35,000,075)			319,419				41,996,381
Total Preferred Stocks — 20.2%							601,486,704
Total Preferred Securities — 20.2% (Cost: $454,544,954)							601,486,704
Warrants
Capital Markets — 0.0%
Dragoneer Growth Opportunities Corp., Class A(c)			146,660				233,189

2

Consolidated Schedule of Investments  (unaudited) (continued) March 31, 2021 BlackRock Science and Technology Trust II (BSTZ) (Percentages shown are based on Net Assets)

Security		Shares				Value
IT Services — 0.0%
TRAX Ltd., (Acquired 09/12/19, Cost: $0)(a)(e)			46,928			$	371,201
Total Warrants — 0.0% (Cost: $353,480)							604,390
Total Long-Term Investments — 98.3% (Cost: $1,496,621,833)							2,929,584,012
Short-Term Securities
Money Market Funds — 2.7%
BlackRock Liquidity Funds, T-Fund, Institutional Class, 0.01%(h)(i)			75,288,308				75,288,308
SL Liquidity Series, LLC, Money Market Series, 0.16%(h)(i)(j)			5,896,992				5,898,761
Total Short-Term Securities — 2.7% (Cost: $81,187,069)							81,187,069
Total Investments Before Options Written — 101.0% (Cost: $1,577,808,902)							3,010,771,081
Options Written — (0.5)% (Premiums Received: $(32,614,596))							(15,503,355	)
Total Investments, Net of Options Written — 100.5% (Cost: $1,545,194,306)							2,995,267,726
Liabilities in Excess of Other Assets — (0.5)%							(15,399,778	)
Net Assets — 100.0%						$	2,979,867,948

(a) Restricted security as to resale, excluding 144A securities. The Trust held restricted securities with a current value of $839,837,223, representing 28.18% of its net assets as of period end, and an original cost of $548,987,117.

(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) 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.

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

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

(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 March 31, 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 03/31/21				Shares Held at 03/31/21				Income				Capital Gain Distributions from Underlying Funds
BlackRock Liquidity Funds, T-Fund, Institutional Class		$	21,688,765			$	53,599,543	(a)		$	—			$	—			$	—			$	75,288,308				75,288,308			$	2,306			$	—
SL Liquidity Series, LLC, Money Market Series			—				5,898,962	(a)			—				(201	)			—				5,898,761				5,896,992				11,167	(b)			—
														$	(201	)		$	—			$	81,187,069							$	13,473			$	—

^(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.

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
Lyft, Inc., Class A		185		04/01/21		USD			62.00			USD			1,169			$	(27,658	)
MongoDB, Inc.		77		04/01/21		USD			445.00			USD			2,059				(5,775	)
Okta, Inc.		54		04/01/21		USD			277.50			USD			1,190				(1,998	)
RingCentral, Inc., Class A		50		04/01/21		USD			415.00			USD			1,489				(2,500	)
Cloudflare, Inc., Class A		450		04/09/21		USD			79.00			USD			3,162				(13,500	)
Cree, Inc.		202		04/09/21		USD			125.00			USD			2,184				(101,000	)

C O N S O L I D A T E D S C H E D U L E O F I N V E S T M E N T S 3

Consolidated Schedule of Investments  (unaudited) (continued) March 31, 2021 BlackRock Science and Technology Trust II (BSTZ)

Exchange-Traded Options Written (continued)

Description		Number of Contracts		Expiration Date		Exercise Price						Notional Amount (000)						Value
Call (continued)
Crowdstrike Holdings, Inc., Class A		99		04/09/21		USD			235.00			USD			1,807			$	(743	)
Lyft, Inc., Class A		217		04/09/21		USD			62.00			USD			1,371				(54,033	)
Marvell Technology Group Ltd.		243		04/09/21		USD			52.00			USD			1,190				(7,169	)
MercadoLibre, Inc.		48		04/09/21		USD			1,775.00			USD			7,066				(20,640	)
Okta, Inc.		54		04/09/21		USD			280.00			USD			1,190				(5,886	)
Roku, Inc.		80		04/09/21		USD			430.00			USD			2,606				(1,280	)
Snap, Inc., Class A		166		04/09/21		USD			70.00			USD			868				(1,245	)
Snap, Inc., Class A		167		04/09/21		USD			69.50			USD			873				(2,338	)
Snap, Inc., Class A		312		04/09/21		USD			65.00			USD			1,631				(4,524	)
Square, Inc., Class A		225		04/09/21		USD			250.00			USD			5,109				(25,425	)
StoneCo. Ltd., Class A		104		04/09/21		USD			85.00			USD			637				(5,720	)
Tesla, Inc.		52		04/09/21		USD			775.00			USD			3,473				(9,438	)
Twilio, Inc., Class A		35		04/09/21		USD			425.00			USD			1,193				(701	)
Zscaler, Inc.		139		04/09/21		USD			215.00			USD			2,386				(14,595	)
ACM Research, Inc., Class A		420		04/16/21		USD			142.00			USD			3,393				(513	)
Avalara, Inc.		170		04/16/21		USD			180.00			USD			2,268				(3,400	)
Bandwidth, Inc., Class A		179		04/16/21		USD			220.00			USD			2,269				(60,860	)
C3.AI, Inc., Class A		94		04/16/21		USD			165.00			USD			620				(1,410	)
C3.AI, Inc., Class A		101		04/16/21		USD			105.00			USD			666				(3,030	)
Chegg, Inc.		460		04/16/21		USD			125.00			USD			3,940				(2,300	)
Cloudflare, Inc., Class A		190		04/16/21		USD			85.00			USD			1,335				(3,230	)
CoStar Group, Inc.		24		04/16/21		USD			970.00			USD			1,973				(12,000	)
Coupa Software, Inc.		75		04/16/21		USD			370.00			USD			1,909				(10,500	)
Cree, Inc.		201		04/16/21		USD			125.00			USD			2,173				(12,563	)
Crowdstrike Holdings, Inc., Class A		84		04/16/21		USD			230.00			USD			1,533				(1,428	)
Elastic NV		256		04/16/21		USD			175.00			USD			2,847				(1,280	)
Farfetch Ltd., Class A		600		04/16/21		USD			70.00			USD			3,181				(14,100	)
Farfetch Ltd., Class A		1,155		04/16/21		USD			80.00			USD			6,124				(12,705	)
Farfetch Ltd., Class A		596		04/16/21		USD			65.00			USD			3,160				(23,244	)
Five9, Inc.		346		04/16/21		USD			190.00			USD			5,409				(6,920	)
GDS Holdings Ltd., ADR		368		04/16/21		USD			120.00			USD			2,984				(184,000	)
Inphi Corp.		399		04/16/21		USD			170.00			USD			7,119				(385,035	)
Kingsoft Cloud Holdings Ltd., ADR		1,050		04/16/21		USD			60.00			USD			4,129				(10,500	)
Lightspeed POS, Inc.		800		04/16/21		CAD			94.00			CAD			6,322				(33,421	)
Lyft, Inc., Class A		217		04/16/21		USD			60.00			USD			1,371				(95,480	)
Marvell Technology Group Ltd.		242		04/16/21		USD			55.00			USD			1,185				(8,470	)
MongoDB, Inc.		34		04/16/21		USD			410.00			USD			909				(680	)
Monolithic Power Systems, Inc.		145		04/16/21		USD			420.00			USD			5,122				(5,438	)
Ozon Holdings PLC, ADR		868		04/16/21		USD			60.00			USD			4,867				(91,140	)
Pagseguro Digital Ltd., Class A		182		04/16/21		USD			60.00			USD			843				(1,820	)
Qorvo, Inc.		246		04/16/21		USD			185.25			USD			4,494				(110,621	)
RingCentral, Inc., Class A		40		04/16/21		USD			410.00			USD			1,191				(1,800	)
Roku, Inc.		119		04/16/21		USD			485.00			USD			3,877				(2,975	)
Shift4 Payments, Inc., Class A		260		04/16/21		USD			85.00			USD			2,132				(78,650	)
Shift4 Payments, Inc., Class A		400		04/16/21		USD			95.00			USD			3,280				(25,000	)
Shoals Technologies Group Inc., Class A		258		04/16/21		USD			45.00			USD			897				(7,740	)
Shoals Technologies Group Inc., Class A		258		04/16/21		USD			50.00			USD			897				(6,450	)
Snap, Inc., Class A		397		04/16/21		USD			65.00			USD			2,076				(16,674	)
Square, Inc., Class A		225		04/16/21		USD			260.00			USD			5,109				(30,600	)
Synopsys, Inc.		126		04/16/21		USD			240.00			USD			3,122				(139,860	)
Tesla, Inc.		47		04/16/21		USD			830.00			USD			3,139				(8,390	)
Trade Desk, Inc., Class A		51		04/16/21		USD			900.00			USD			3,323				(7,650	)
Twilio, Inc., Class A		108		04/16/21		USD			450.00			USD			3,680				(2,862	)
Unity Software, Inc.		287		04/16/21		USD			144.00			USD			2,879				(231	)
Wix.com Ltd.		132		04/16/21		USD			350.00			USD			3,686				(4,290	)
XPeng, Inc., ADR		570		04/16/21		USD			55.00			USD			2,081				(3,990	)
Zendesk, Inc.		279		04/16/21		USD			170.00			USD			3,700				(33,480	)
ZoomInfo Technologies, Inc., Class A		774		04/16/21		USD			65.00			USD			3,785				(11,610	)
Zscaler, Inc.		139		04/16/21		USD			220.00			USD			2,386				(4,170	)
Zynga, Inc., Class A		2,499		04/16/21		USD			12.00			USD			2,551				(8,746	)
Atlassian Corp. PLC, Class A		68		04/23/21		USD			237.50			USD			1,433				(14,450	)
Crowdstrike Holdings, Inc., Class A		99		04/23/21		USD			240.00			USD			1,807				(4,901	)

4

Consolidated Schedule of Investments  (unaudited) (continued) March 31, 2021 BlackRock Science and Technology Trust II (BSTZ)

Exchange-Traded Options Written (continued)

Description		Number of Contracts		Expiration Date		Exercise Price				Notional Amount (000)				Value
Call (continued)
Lyft, Inc., Class A		249		04/23/21		USD		66.00		USD		1,573		$	(45,940	)
Okta, Inc.		159		04/23/21		USD		235.00		USD		3,505			(67,972	)
RingCentral, Inc., Class A		131		04/23/21		USD		350.00		USD		3,902			(14,083	)
Snap, Inc., Class A		323		04/23/21		USD		60.00		USD		1,689			(65,407	)
Snap, Inc., Class A		334		04/23/21		USD		63.50		USD		1,746			(44,589	)
Tesla, Inc.		55		04/23/21		USD		790.00		USD		3,674			(40,837	)
Twilio, Inc., Class A		103		04/23/21		USD		375.00		USD		3,510			(62,057	)
Zscaler, Inc.		47		04/23/21		USD		210.00		USD		807			(5,006	)
Zscaler, Inc.		282		04/23/21		USD		200.00		USD		4,841			(44,274	)
Zynga, Inc., Class A		305		04/23/21		USD		11.00		USD		311			(4,270	)
Cloudflare, Inc., Class A		322		04/30/21		USD		85.00		USD		2,262			(17,227	)
Coupa Software, Inc.		81		04/30/21		USD		300.00		USD		2,061			(24,503	)
Crowdstrike Holdings, Inc., Class A		91		04/30/21		USD		210.00		USD		1,661			(20,157	)
Lyft, Inc., Class A		515		04/30/21		USD		75.00		USD		3,254			(28,067	)
Marvell Technology Group Ltd.		385		04/30/21		USD		60.00		USD		1,886			(10,203	)
Marvell Technology Group Ltd.		250		04/30/21		USD		50.00		USD		1,224			(47,875	)
MercadoLibre, Inc.		32		04/30/21		USD		1,710.00		USD		4,711			(24,000	)
MongoDB, Inc.		40		04/30/21		USD		300.00		USD		1,070			(22,800	)
RingCentral, Inc., Class A		68		04/30/21		USD		370.00		USD		2,026			(7,480	)
Roku, Inc.		29		04/30/21		USD		400.00		USD		945			(9,121	)
Snap, Inc., Class A		1,020		04/30/21		USD		64.00		USD		5,334			(156,060	)
Square, Inc., Class A		315		04/30/21		USD		250.00		USD		7,152			(174,037	)
StoneCo. Ltd., Class A		201		04/30/21		USD		73.00		USD		1,231			(10,553	)
Tesla, Inc.		47		04/30/21		USD		810.00		USD		3,139			(43,592	)
Trade Desk, Inc., Class A		36		04/30/21		USD		850.00		USD		2,346			(17,190	)
Twilio, Inc., Class A		113		04/30/21		USD		405.00		USD		3,851			(46,047	)
XPeng, Inc., ADR		950		04/30/21		USD		41.00		USD		3,468			(158,650	)
Zynga, Inc., Class A		1,507		04/30/21		USD		11.00		USD		1,539			(27,880	)
Atlassian Corp. PLC, Class A		65		05/07/21		USD		230.00		USD		1,370			(41,275	)
Cree, Inc.		218		05/07/21		USD		116.00		USD		2,357			(117,720	)
Crowdstrike Holdings, Inc., Class A		70		05/07/21		USD		197.50		USD		1,278			(42,175	)
Marvell Technology Group Ltd.		252		05/07/21		USD		50.00		USD		1,234			(54,810	)
Snap, Inc., Class A		73		05/07/21		USD		55.00		USD		382			(28,470	)
Snap, Inc., Class A		261		05/07/21		USD		57.50		USD		1,365			(78,952	)
StoneCo. Ltd., Class A		104		05/07/21		USD		70.00		USD		637			(11,440	)
Tesla, Inc.		23		05/07/21		USD		700.00		USD		1,536			(96,427	)
Tesla, Inc.		34		05/07/21		USD		745.00		USD		2,271			(88,910	)
Twilio, Inc., Class A		60		05/07/21		USD		370.00		USD		2,045			(82,800	)
ACM Research, Inc., Class A		390		05/21/21		USD		105.00		USD		3,151			(127,725	)
Atlassian Corp. PLC, Class A		163		05/21/21		USD		230.00		USD		3,435			(123,880	)
Avalara, Inc.		310		05/21/21		USD		150.00		USD		4,136			(139,500	)
Bandwidth, Inc., Class A		220		05/21/21		USD		155.00		USD		2,788			(81,950	)
Chegg, Inc.		601		05/21/21		USD		99.00		USD		5,148			(137,709	)
Cloudflare, Inc., Class A		424		05/21/21		USD		70.00		USD		2,979			(277,720	)
CoStar Group, Inc.		26		05/21/21		USD		870.00		USD		2,137			(61,100	)
Coupa Software, Inc.		75		05/21/21		USD		280.00		USD		1,909			(67,125	)
Cree, Inc.		371		05/21/21		USD		120.00		USD		4,012			(185,500	)
Elastic NV		255		05/21/21		USD		135.00		USD		2,836			(42,712	)
Eventbrite, Inc., Class A		978		05/21/21		USD		25.00		USD		2,167			(141,810	)
Farfetch Ltd., Class A		423		05/21/21		USD		65.00		USD		2,243			(89,676	)
Farfetch Ltd., Class A		386		05/21/21		USD		61.00		USD		2,047			(97,540	)
Five9, Inc.		250		05/21/21		USD		180.00		USD		3,908			(83,750	)
GDS Holdings Ltd., ADR		230		05/21/21		USD		95.00		USD		1,865			(58,650	)
Inphi Corp.		354		05/21/21		USD		170.00		USD		6,316			(433,650	)
Kingsoft Cloud Holdings Ltd., ADR		600		05/21/21		USD		45.00		USD		2,359			(124,500	)
Lattice Semiconductor Corp.		758		05/21/21		USD		50.00		USD		3,412			(132,650	)
Lightspeed POS, Inc.		1,150		05/21/21		CAD		88.00		CAD		9,088			(398,066	)
Marvell Technology Group Ltd.		810		05/21/21		USD		52.50		USD		3,967			(138,915	)
MongoDB, Inc.		67		05/21/21		USD		380.00		USD		1,792			(11,390	)
Monolithic Power Systems, Inc.		125		05/21/21		USD		370.00		USD		4,415			(205,000	)
Okta, Inc.		112		05/21/21		USD		260.00		USD		2,469			(33,768	)
Pagseguro Digital Ltd., Class A		204		05/21/21		USD		57.50		USD		945			(11,220	)

CONSOLIDATED SCHEDULE OF INVESTMENTS 5

Consolidated Schedule of Investments  (unaudited) (continued) March 31, 2021 BlackRock Science and Technology Trust II (BSTZ)

Exchange-Traded Options Written (continued)

Description		Number of Contracts		Expiration Date		Exercise Price				Notional Amount (000)				Value
Call (continued)
Qorvo, Inc.		240		05/21/21		USD		195.00		USD		4,385		$	(169,200	)
Roku, Inc.		79		05/21/21		USD		350.00		USD		2,574			(172,022	)
Shoals Technologies Group Inc., Class A		567		05/21/21		USD		40.00		USD		1,972			(153,090	)
Square, Inc., Class A		100		05/21/21		USD		230.00		USD		2,270			(175,750	)
Synopsys, Inc.		180		05/21/21		USD		260.00		USD		4,460			(129,600	)
Tesla, Inc.		47		05/21/21		USD		830.00		USD		3,139			(71,557	)
Twilio, Inc., Class A		87		05/21/21		USD		400.00		USD		2,965			(92,002	)
Unity Software, Inc.		410		05/21/21		USD		130.00		USD		4,113			(71,750	)
Wix.com Ltd.		113		05/21/21		USD		310.00		USD		3,155			(125,995	)
XPeng, Inc., ADR		500		05/21/21		USD		40.00		USD		1,825			(160,000	)
Zendesk, Inc.		300		05/21/21		USD		143.00		USD		3,979			(120,283	)
ZoomInfo Technologies, Inc., Class A		775		05/21/21		USD		55.00		USD		3,790			(174,375	)
Zynga, Inc., Class A		1,780		05/21/21		USD		11.00		USD		1,817			(66,750	)
Lattice Semiconductor Corp.		745		06/18/21		USD		50.00		USD		3,354			(171,350	)
Ozon Holdings PLC, ADR		868		06/18/21		USD		65.00		USD		4,867			(238,700	)
														$	(8,997,561	)

OTC Options Written

Description		Counterparty		Number of Contracts		Expiration Date		Exercise Price				Notional Amount (000)				Value
Call
Endava PLC, ADR		UBS AG		16,200		04/06/21		USD		88.06		USD		1,372		$	(7,651	)
Delivery Hero SE		Goldman Sachs International		58,100		04/07/21		EUR		116.99		EUR		6,420			(66,075	)
Kakao Corp.		Morgan Stanley & Co. International PLC		4,600		04/07/21		USD		497,175.00		USD		2,290,800			(40,451	)
Kingdee International Software Group Co. Ltd.		Morgan Stanley & Co. International PLC		1,046,000		04/07/21		HKD		33.11		HKD		25,209			(44	)
Silergy Corp.		JPMorgan Chase Bank N.A.		46,000		04/07/21		USD		3,151.15		USD		106,030			(3	)
SOITEC SA		UBS AG		14,600		04/07/21		EUR		177.88		EUR		2,545			(35,202	)
Adyen NV		UBS AG		4,500		04/13/21		EUR		2,059.20		EUR		8,566			(45,245	)
Endava PLC, ADR		Bank of America N.A.		27,300		04/13/21		USD		88.58		USD		2,312			(25,952	)
SOITEC SA		Barclays Bank PLC		10,500		04/13/21		EUR		178.09		EUR		1,830			(38,968	)
BE Semiconductor Industries NV		Barclays Bank PLC		37,000		04/14/21		EUR		64.79		EUR		2,643			(289,830	)
GMO Payment Gateway, Inc.		JPMorgan Chase Bank N.A.		29,200		04/14/21		JPY		14,516.48		JPY		428,656			(149,093	)
Xero Ltd.		UBS AG		34,600		04/14/21		AUD		121.24		AUD		4,378			(201,966	)
Delivery Hero SE		Morgan Stanley & Co. International PLC		1,600		04/20/21		EUR		112.38		EUR		177			(7,792	)
Freee KK		JPMorgan Chase Bank N.A.		57,200		04/20/21		JPY		10,796.30		JPY		537,680			(106,234	)
Rakus Co. Ltd.		JPMorgan Chase Bank N.A.		146,300		04/20/21		JPY		1,934.18		JPY		312,204			(324,735	)
Shop Apotheke Europe NV		Goldman Sachs International		19,700		04/20/21		EUR		196.27		EUR		3,664			(141,513	)
SOITEC SA		Morgan Stanley & Co. International PLC		14,700		04/20/21		EUR		170.47		EUR		2,562			(135,892	)
Altium Ltd.		JPMorgan Chase Bank N.A.		70,000		04/21/21		AUD		27.77		AUD		1,853			(18,293	)
Endava PLC, ADR		Morgan Stanley & Co. International PLC		18,800		04/21/21		USD		91.50		USD		1,592			(15,552	)
Samsung SDI Co. Ltd.		JPMorgan Chase Bank N.A.		11,000		04/21/21		USD		726,964.13		USD		7,260,000			(71,656	)
Weimob, Inc.		JPMorgan Chase Bank N.A.		2,114,000		04/21/21		HKD		26.00		HKD		36,741			(174	)
Locaweb Servicos DE Internet SA		Morgan Stanley & Co. International PLC		1,313,000		04/22/21		USD		28.84		USD		30,002			(64,587	)
Magazine Luiza SA		Credit Suisse International		2,142,300		04/22/21		USD		25.00		USD		43,360			(3,513	)
Altium Ltd.		Goldman Sachs International		86,000		04/27/21		AUD		26.11		AUD		2,276			(78,190	)
Asmedia Technology, Inc.		Goldman Sachs International		55,000		04/27/21		USD		1,711.51		USD		81,950			(28,450	)
BE Semiconductor Industries NV		Goldman Sachs International		34,600		04/27/21		EUR		61.32		EUR		2,472			(417,994	)
GMO Payment Gateway, Inc.		Goldman Sachs International		36,200		04/27/21		JPY		14,223.03		JPY		531,416			(297,313	)
Weimob, Inc.		Morgan Stanley & Co. International PLC		3,300,000		04/27/21		HKD		20.06		HKD		57,354			(436,232	)
Ncsoft Corp.		Morgan Stanley & Co. International PLC		5,000		04/29/21		USD		986,979.00		USD		4,365,000			(27,026	)
SOITEC SA		UBS AG		10,500		05/04/21		EUR		169.82		EUR		1,830			(120,509	)
Weimob, Inc.		Morgan Stanley & Co. International PLC		2,164,000		05/04/21		HKD		22.27		HKD		37,610			(207,451	)
Xero Ltd.		UBS AG		39,000		05/04/21		AUD		122.82		AUD		4,935			(245,352	)
Altium Ltd.		UBS AG		90,700		05/06/21		AUD		27.63		AUD		2,401			(43,900	)
Asmedia Technology, Inc.		UBS AG		38,000		05/06/21		USD		1,601.65		USD		56,620			(61,723	)
Endava PLC, ADR		Bank of America N.A.		22,000		05/06/21		USD		86.25		USD		1,863			(71,109	)
Freee KK		Morgan Stanley & Co. International PLC		80,000		05/06/21		JPY		10,938.17		JPY		752,000			(253,366	)
Kakao Corp.		Morgan Stanley & Co. International PLC		10,000		05/06/21		USD		512,940.00		USD		4,980,000			(135,401	)

6

Consolidated Schedule of Investments  (unaudited) (continued) March 31, 2021 BlackRock Science and Technology Trust II (BSTZ)

OTC Options Written (continued)

Description		Counterparty		Number of Contracts		Expiration Date		Exercise Price				Notional Amount (000)				Value
Call (continued)
Kingdee International Software Group Co. Ltd.		Citibank N.A.		1,616,000		05/06/21		HKD		28.71		HKD		38,946		$	(161,846	)
Lasertec Corp.		Morgan Stanley & Co. International PLC		68,000		05/06/21		JPY		14,168.02		JPY		987,360			(703,933	)
Rakus Co. Ltd.		Goldman Sachs International		128,000		05/06/21		JPY		2,242.24		JPY		273,152			(130,651	)
Rakus Co. Ltd.		Goldman Sachs International		96,700		05/06/21		JPY		2,269.28		JPY		206,358			(89,522	)
Samsung SDI Co. Ltd.		Citibank N.A.		10,300		05/06/21		USD		667,185.16		USD		6,798,000			(305,710	)
Endava PLC, ADR		Bank of America N.A.		16,600		05/11/21		USD		85.92		USD		1,406			(60,318	)
Shop Apotheke Europe NV		Morgan Stanley & Co. International PLC		14,300		05/11/21		EUR		196.07		EUR		2,660			(170,185	)
Silergy Corp.		Morgan Stanley & Co. International PLC		76,000		05/11/21		USD		2,570.85		USD		175,180			(217,033	)
Delivery Hero SE		Goldman Sachs International		13,900		05/14/21		EUR		113.47		EUR		1,536			(86,557	)
Freee KK		Goldman Sachs International		57,400		05/14/21		JPY		9,962.99		JPY		539,560			(198,797	)
Lasertec Corp.		Morgan Stanley & Co. International PLC		28,000		05/14/21		JPY		14,899.40		JPY		406,560			(166,805	)
																$	(6,505,794	)

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 investments categorized in the fair value hierarchy. The breakdown of the Trust’s investments 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
Automobiles		$	92,684,912			$	42,540,469			$	—			$	135,225,381
Capital Markets			6,852,630				—				—				6,852,630
Diversified Consumer Services			30,509,265				—				—				30,509,265
Diversified Financial Services			—				8,528,989				—				8,528,989
Diversified Telecommunication Services			16,900,652				—				—				16,900,652
Electrical Equipment			12,654,425				—				—				12,654,425
Electronic Equipment, Instruments & Components			—				43,050,851				—				43,050,851
Entertainment			54,034,108				38,640,910				—				92,675,018
Interactive Media & Services			92,181,146				67,739,917				—				159,921,063
Internet & Direct Marketing Retail			124,887,182				56,479,336				—				181,366,518

CONSOLIDATED SCHEDULES OF INVESTMENTS 7

Consolidated Schedule of Investments  (unaudited) (continued) March 31, 2021 BlackRock Science and Technology Trust II (BSTZ)

Fair Value Hierarchy as of Period End (continued)

		Level 1				Level 2				Level 3				Total
Common Stocks (continued)
IT Services		$	391,847,332			$	63,254,190			$	101,002,185			$	556,103,707
Multi-line Retail			26,564,133				—				—				26,564,133
Professional Services			14,829,361				—				—				14,829,361
Road & Rail			29,984,786				—				—				29,984,786
Semiconductors & Semiconductor Equipment			223,481,881				151,790,083				—				375,271,964
Software			375,414,016				218,325,207				30,714,761				624,453,984
Specialty Retail			—				—				12,600,191				12,600,191
Preferred Securities
Preferred Stocks			—				—				601,486,704				601,486,704
Warrants			233,189				—				371,201				604,390
Short-Term Securities
Money Market Funds			75,288,308				—				—				75,288,308
		$	1,568,347,326			$	690,349,952			$	746,175,042				3,004,872,320
Investments Valued at NAV(a)															5,898,761
														$	3,010,771,081
Derivative Financial Instruments(b)
Liabilities
Equity Contracts		$	(8,530,664	)		$	(6,972,691	)		$	—			$	(15,503,355	)

^(a)  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.

^(b)  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				Warrants				Total
Assets
Opening balance, as of December 31, 2020		$	116,083,688			$	401,750,866			$	521,839			$	518,356,393
Transfers into Level 3			—				—				—				—
Transfers out of Level 3			—				—				—				—
Other(a)			(50,216,671	)			50,216,671				—				—
Accrued discounts/premiums			—				—				—				—
Net realized gain (loss)			—				190,398				—				190,398
Net change in unrealized appreciation (depreciation)(b)			70,950,123				50,626,360				(150,638	)			121,425,845
Purchases			7,499,997				118,884,810				—				126,384,807
Sales			—				(20,182,401	)			—				(20,182,401	)
Closing balance, as of March 31, 2021		$	144,317,137			$	601,486,704			$	371,201			$	746,175,042
Net change in unrealized appreciation (depreciation) on investments still held at March 31, 2021(b)		$	70,950,123			$	98,376,989			$	(150,639	)		$	169,176,473

^(a)  Certain Level 3 investments were re-classified between Common Stocks and Preferred Stocks

^(b) Any difference between net change in unrealized appreciation (depreciation) and net change in unrealized appreciation (depreciation) on investments still held at March 31, 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)		$	144,317,137				Market				Revenue Multiple				6.25x - 42.00x				25.62x
											Recent Transactions				—				—
Preferred Stocks(c)(d)(e)			601,486,704				Income				Discount Rate				27	%			—
							Market				Revenue Multiple				5.00x - 42.00x				17.76x
											Volatility				28% - 58%				52%
											Time to Exit				2.5 - 5.0				3.0
											Recent Transactions				—				—
Warrants		$	371,201				Market				Recent Transactions				—				—
		$	746,175,042

8

Consolidated Schedule of Investments  (unaudited) (continued) March 31, 2021 BlackRock Science and Technology Trust II (BSTZ)

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

^(b)  For the period end March 31, 2021, the valuation technique for investments classified as Common Stocks amounting to $12,600,191 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.

^(c)  For the period end March 31, 2021, the valuation technique for investments classified as Preferred Stocks amounting to $87,314,420 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.

^(d)  For the period end March 31, 2021, the valuation technique for investments classified as Preferred Stocks amounting to $5,020,950 changed to Transaction Price Approach. The investments were previously valued utilizing Option Pricing Model 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 March 31, 2021, the valuation technique for investments classified as Preferred Stocks amounting to $52,718,413 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.

Currency Abbreviation
AUD		Australian Dollar
CAD		Canadian Dollar
EUR		Euro
HKD		Hong Kong Dollar
JPY		Japanese Yen
USD		United States Dollar
Portfolio Abbreviation
ADR		American Depositary Receipt

CONSOLIDATED SCHEDULE OF INVESTMENTS 9