Vault-13

BLACKROCK SCIENCE & TECHNOLO BSTZ

SHS BEN INT · Closed-End Fund · CUSIP 09260K101

152 institutional holders +18 vs Q1 2026
21,980,64222.0m shares reported held*
$659.5mreported value*
26 new 58 added 37 reduced 7 sold out net bought ≈ $28.8m (+958.1k shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($5.6k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $30.00.

Trends to Q2 2026

Institutional holders

Managers reporting a position, each quarter

0100200Q3 22: 84Q4 22: 105Q1 23: 94Q2 23: 91Q3 23: 105Q4 23: 108Q1 24: 99Q2 24: 99Q3 24: 102Q4 24: 111Q1 25: 107Q2 25: 116Q3 25: 114Q4 25: 126Q1 26: 134Q2 26: 152152Q3 22Q3 23Q3 24Q3 25Q2 26
Numbers
QuarterHolders
Q3 202284
Q4 2022105
Q1 202394
Q2 202391
Q3 2023105
Q4 2023108
Q1 202499
Q2 202499
Q3 2024102
Q4 2024111
Q1 2025107
Q2 2025116
Q3 2025114
Q4 2025126
Q1 2026134
Q2 2026152

Buyers vs sellers

Managers adding to or starting a position, vs cutting or selling out

Bought or addedCut or sold out
1000100Q3 24: 44 bought or addedQ3 24: 52 cut or sold outQ4 24: 38 bought or addedQ4 24: 57 cut or sold outQ4 24Q1 25: 46 bought or addedQ1 25: 61 cut or sold outQ2 25: 56 bought or addedQ2 25: 48 cut or sold outQ2 25Q3 25: 70 bought or addedQ3 25: 40 cut or sold outQ4 25: 61 bought or addedQ4 25: 43 cut or sold outQ4 25Q1 26: 75 bought or addedQ1 26: 42 cut or sold outQ2 26: 84 bought or addedQ2 26: 44 cut or sold outQ2 26
Numbers
QuarterBought or addedCut or sold out
Q3 20244452
Q4 20243857
Q1 20254661
Q2 20255648
Q3 20257040
Q4 20256143
Q1 20267542
Q2 20268444

Biggest buyers

Potrero Capital Research LLC New +167,198+167.2k
Saba Capital Management, L.P. Added +165,278+165.3k
WEDBUSH SECURITIES INC Added +106,783+106.8k
Steward Partners Investment Advisory, LLC Added +89,231+89.2k
Summit Financial, LLC Added +88,658+88.7k
Thomas J. Herzfeld Advisors, Inc. Added +83,361+83.4k
Karpus Management, Inc. Added +73,390+73.4k
BANK OF AMERICA CORP /DE/ Added +67,125+67.1k
Rockefeller Capital Management L.P. Added +62,082+62.1k
Family Manage LLC New +53,556+53.6k

Biggest sellers

ABSOLUTE INVESTMENT ADVISERS, LLC Sold out -137,302-137.3k
Invesco Ltd. Reduced -91,339-91.3k
MORGAN STANLEY Reduced -75,093-75.1k
UBS Group AG Reduced -70,494-70.5k
Quarry LP Sold out -65,821-65.8k
MILLENNIUM MANAGEMENT LLC Reduced -54,626-54.6k
WOLVERINE ASSET MANAGEMENT LLC Reduced -35,909-35.9k
RAYMOND JAMES FINANCIAL INC Reduced -34,197-34.2k
Quantedge Capital Pte Ltd Reduced -21,600-21.6k
Kestra Advisory Services, LLC Reduced -18,398-18.4k

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
Saba Capital Management, L.P. 13D · may seek influence +1.1 pts · filed 2026-03-17
Stated purposeNot Applicable. Full filing
 7.9% +1.1 pts 5.5m≈ $163.9m 2026-03-17

Insider purchases and sales since 1 Apr 2026

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

Officers and directors buying vs selling

Number of people, by quarter (10% owners not included)

BuyingSelling
101Q4 24: 0 buyingQ4 24: 0 sellingQ1 25: 0 buyingQ1 25: 0 sellingQ1 25Q2 25: 0 buyingQ2 25: 0 sellingQ3 25: 0 buyingQ3 25: 0 sellingQ3 25Q4 25: 0 buyingQ4 25: 1 sellingQ1 26: 1 buyingQ1 26: 0 sellingQ1 26Q2 26: 0 buyingQ2 26: 0 sellingQ3 26: 0 buyingQ3 26: 0 sellingQ3 26
Numbers
QuarterBuyingBoughtSellingSoldSold under a plan
Q4 20240—0——
Q1 20250—0——
Q2 20250—0——
Q3 20250—0——
Q4 20250—1$209.2k—
Q1 20261$20.3k0——
Q2 20260—0——
Q3 20260—0——

None reported since 1 Apr 2026.

Holders, Q2 2026

#ManagerLocationShares Value% of their portfolioChangeShares change
1 Saba Capital Management, L.P. 5.23% of their portfolio NEW YORK, NY 5,696,8735.7m $171.1m $171.1m 5.23% Added +165.3k +165,278
2 MORGAN STANLEY 0.01% of their portfolio NEW YORK, NY 3,336,6263.3m $100.2m $100.2m 0.01% Reduced -75.1k -75,093
3 RIVERNORTH CAPITAL MANAGEMENT, LLC 2.16% of their portfolio WEST PALM BEACH, FL 1,511,4811.5m $45.4m $45.4m 2.16% Added +17.5k +17,544
4 UBS Group AG 0.01% of their portfolio ZURICH, V8 1,132,8681.1m $34.0m $34.0m 0.01% Reduced -70.5k -70,494
5 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 993,064993.1k $29.8m $29.8m 0.00% Added +67.1k +67,125
6 RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio ST. PETERSBURG, FL 941,190941.2k $28.3m $28.3m 0.01% Reduced -34.2k -34,197
7 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 844,911844.9k $25.4m $25.4m 0.00% Reduced -91.3k -91,339
8 WEDBUSH SECURITIES INC 0.59% of their portfolio PASADENA, CA 763,870763.9k $22.9m $22.9m 0.59% Added +106.8k +106,783
9 LAZARD ASSET MANAGEMENT LLC 0.03% of their portfolio NEW YORK, NY 677,993678.0k $20.4m $20.4m 0.03% Unchanged
10 Karpus Management, Inc. 0.42% of their portfolio Pittsford, NY 483,321483.3k $14.5m $14.5m 0.42% Added +73.4k +73,390
11 FLAGSHIP HARBOR ADVISORS, LLC 0.37% of their portfolio BOSTON, MA 323,702323.7k $9.7m $9.7m 0.37% Added +8.5k +8,495
12 Z3 Capital Partners, LLC 2.00% of their portfolio RICHMOND, VA 316,562316.6k $9.5m $9.5m 2.00% Added +9.2k +9,154
13 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 315,033315.0k $9.5m $9.5m 0.00% Added +13.1k +13,081
14 Rockefeller Capital Management L.P. 0.01% of their portfolio NEW YORK, NY 283,241283.2k $8.5m $8.5m 0.01% Added +62.1k +62,082
15 OPPENHEIMER & CO INC 0.08% of their portfolio NEW YORK, NY 257,568257.6k $7.7m $7.7m 0.08% Added +24.1k +24,127
16 Steward Partners Investment Advisory, LLC 0.04% of their portfolio STAMFORD, CT 243,765243.8k $7.3m $7.3m 0.04% Added +89.2k +89,231
17 LPL Financial LLC 0.00% of their portfolio FORT MILL, SC 193,382193.4k $5.8m $5.8m 0.00% Reduced -6.2k -6,241
18 BLUE BELL PRIVATE WEALTH MANAGEMENT, LLC 0.71% of their portfolio BLUE BELL, PA 190,304190.3k $5.7m $5.7m 0.71% Added +24.3k +24,252
19 WEALTH ENHANCEMENT ADVISORY SERVICES, LLC 0.01% of their portfolio PLYMOUTH, MN 176,994177.0k $5.2m $5.2m 0.01% Added +38.9k +38,920
20 Potrero Capital Research LLC 3.08% of their portfolio SAN FRANCISCO, CA 167,198167.2k $5.0m $5.0m 3.08% New
21 Thomas J. Herzfeld Advisors, Inc. 1.53% of their portfolio MIAMI BEACH, FL 166,033166.0k $5.0m $5.0m 1.53% Added +83.4k +83,361
22 OSAIC HOLDINGS, INC. 0.01% of their portfolio SCOTTSDALE, AZ 150,764150.8k $4.5m $4.5m 0.01% Added +10.7k +10,708
23 Summit Financial, LLC 0.05% of their portfolio PARSIPPANY, NJ 138,072138.1k $4.1m $4.1m 0.05% Added +88.7k +88,658
24 RFG Advisory, LLC 0.05% of their portfolio BIRMINGHAM, AL 97,79297.8k $2.9m $2.9m 0.05% Added +1.5k +1,488
25 STIFEL FINANCIAL CORP 0.00% of their portfolio ST. LOUIS, MO 94,55894.6k $2.8m $2.8m 0.00% Added +3.3k +3,314
26 Sanctuary Advisors, LLC 0.01% of their portfolio INDIANAPOLIS, IN 93,49793.5k $2.8m $2.8m 0.01% Added +656 +656
27 INDEPENDENT FINANCIAL GROUP, LLC 0.05% of their portfolio SAN DIEGO, CA 91,50091.5k $2.7m $2.7m 0.05% Reduced -2.5k -2,450
28 INTREPID FAMILY OFFICE LLC 2.21% of their portfolio SARASOTA, FL 80,00080.0k $2.4m $2.4m 2.21% Unchanged
29 Cetera Investment Advisers 0.00% of their portfolio SCHAUMBURG, IL 75,64975.6k $2.3m $2.3m 0.00% Added +8.9k +8,940
30 1607 Capital Partners, LLC 0.17% of their portfolio Richmond, VA 66,25066.2k $2.0m $2.0m 0.17% Added +4.8k +4,850
31 TrueMark Investments, LLC 0.24% of their portfolio CHICAGO, IL 64,07564.1k $1.9m $1.9m 0.24% Added +4.2k +4,236
32 PMG Family Office LLC 1.60% of their portfolio PLANO, TX 57,79957.8k $1.7m $1.7m 1.60% Added +592 +592
33 EVOLVE PRIVATE WEALTH, LLC 0.10% of their portfolio LOS ANGELES, CA 56,83356.8k $1.7m $1.7m 0.10% Reduced -1.4k -1,426
34 Janney Montgomery Scott LLC 0.00% of their portfolio PHILADELPHIA, PA 56,32356.3k $1.7m $1.7m 0.00% Added +2.6k +2,586
35 SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio BALA CYNWYD, PA 53,77653.8k $1.6m $1.6m 0.00% Reduced -5.5k -5,506
36 Family Manage LLC 0.17% of their portfolio NEW YORK, NY 53,55653.6k $1.6m $1.6m 0.17% New
37 HighTower Advisors, LLC 0.00% of their portfolio CHICAGO, IL 52,50152.5k $1.6m $1.6m 0.00% Reduced -12.9k -12,905
38 COMMONWEALTH EQUITY SERVICES, LLC 0.00% of their portfolio WALTHAM, MA 52,13452.1k $1.6m $1.6m 0.00% Reduced -3.8k -3,781
39 Atlas Wealth LLC 0.22% of their portfolio CINCINNATI, OH 50,99351.0k $1.5m $1.5m 0.22% New
40 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 50,64350.6k $1.5m $1.5m 0.00% Added +12.3k +12,345
41 Noble Wealth Management PBC 0.66% of their portfolio GREENWOOD VILLAGE, CO 48,02548.0k $1.4m $1.4m 0.66% Added +46.6k +46,625
42 Formidable Asset Management, LLC 0.17% of their portfolio CINCINNATI, OH 47,58247.6k $1.1m $1.1m 0.17% Reduced -949 -949
43 NWF Advisory Services Inc. 0.13% of their portfolio Los Angeles, CA 44,31544.3k $1.3m $1.3m 0.13% Reduced -982 -982
44 Apollon Wealth Management, LLC 0.02% of their portfolio MOUNT PLEASANT, SC 42,29242.3k $1.3m $1.3m 0.02% Added +970 +970
45 WNY Asset Management, LLC 0.10% of their portfolio Williamsville, NY 38,50138.5k $1.2m $1.2m 0.10% Added +114 +114
46 NewEdge Advisors, LLC 0.00% of their portfolio NEW ORLEANS, LA 38,38438.4k $1.2m $1.2m 0.00% Added +8.2k +8,203
47 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 37,72037.7k $1.1m $1.1m 0.00% Added +9.6k +9,552
48 LM Advisors LLC 0.13% of their portfolio SAN DIEGO, CA 37,59137.6k $1.1m $1.1m 0.13% Added +36.7k +36,733
49 MERCER GLOBAL ADVISORS INC /ADV 0.00% of their portfolio DENVER, CO 37,58537.6k $1.1m $1.1m 0.00% New
50 Anchor Capital Management Group Inc 0.72% of their portfolio ALISO VIEJO, CA 35,00035.0k $1.1m $1.1m 0.72% Unchanged
51 JANE STREET GROUP, LLC 0.00% of their portfolio NEW YORK, NY 33,39333.4k $1.0m $1.0m 0.00% Added +11.9k +11,901
52 Cambridge Investment Research Advisors, Inc. 0.00% of their portfolio FAIRFIELD, IA 33,22633.2k $998.0k $998.0k 0.00% Added +19.8k +19,834
53 HARBOUR INVESTMENTS, INC. 0.01% of their portfolio MADISON, WI 33,19833.2k $996.9k $996.9k 0.01% Added +13.9k +13,925
54 MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio NEW YORK, NY 31,96632.0k $959.9k $959.9k 0.00% Reduced -54.6k -54,626
55 XTX Topco Ltd 0.01% of their portfolio LONDON, X0 31,81131.8k $955.3k $955.3k 0.01% New
56 Quantinno Capital Management LP 0.00% of their portfolio NEW YORK, NY 31,38531.4k $942.5k $942.5k 0.00% Added +1.5k +1,486
57 WOLVERINE ASSET MANAGEMENT LLC 0.01% of their portfolio CHICAGO, IL 30,57630.6k $918.2k $918.2k 0.01% Reduced -35.9k -35,909
58 PFG Investments, LLC 0.03% of their portfolio WOODBURY, NY 29,01229.0k $871.2k $871.2k 0.03% Reduced -2.4k -2,400
59 Fund Advisors of America Inc/FL 0.77% of their portfolio ORLAND, FL 28,23228.2k $847.8k $847.8k 0.77% Added +3.4k +3,360
60 Almitas Capital LLC 0.19% of their portfolio SANTA MONICA, CA 26,81026.8k $805.1k $805.1k 0.19% New
61 Compound Planning, Inc. 0.02% of their portfolio NEW YORK, NY 26,36126.4k $791.6k $791.6k 0.02% Added +14.4k +14,411
62 TRUIST FINANCIAL CORP 0.00% of their portfolio CHARLOTTE, NC 25,51725.5k $766.3k $766.3k 0.00% Reduced -5.6k -5,553
63 CITADEL ADVISORS LLC 0.00% of their portfolio MIAMI, FL 24,33224.3k $730.7k $730.7k 0.00% Added +14.6k +14,605
64 HRT FINANCIAL LP 0.00% of their portfolio NEW YORK, NY 24,28324.3k $729.0k $729.0k 0.00% Added +3.3k +3,284
65 Focus Financial Network, Inc. 0.02% of their portfolio MINNEAPOLIS, MN 23,96024.0k $719.5k $719.5k 0.02% Added +2.4k +2,388
66 AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio Greenwich, CT 22,61822.6k $679.2k $679.2k 0.00% Added +7.1k +7,100
67 Indivisible Partners 0.04% of their portfolio CLEARWATER, FL 22,34422.3k $671.0k $671.0k 0.04% Reduced -3.3k -3,293
68 UHLMANN PRICE SECURITIES, LLC 0.02% of their portfolio SKOKIE, IL 20,90220.9k $627.7k $627.7k 0.02% Added +2.4k +2,400
69 Mathes Company, Inc. 0.18% of their portfolio New York, NY 19,70019.7k $592.0k $592.0k 0.18% Unchanged
70 MGO ONE SEVEN LLC 0.01% of their portfolio Beachwood, OH 19,06819.1k $572.6k $572.6k 0.01% New
71 Mariner, LLC 0.00% of their portfolio Overland Park, KS 19,02619.0k $571.4k $571.4k 0.00% Reduced -1.4k -1,442
72 Quantedge Capital Pte Ltd 0.43% of their portfolio Singapore, U0 19,00019.0k $570.6k $570.6k 0.43% Reduced -21.6k -21,600
73 SeaCrest Wealth Management, LLC 0.06% of their portfolio PURCHASE, NY 18,70518.7k $561.7k $561.7k 0.06% Reduced -3.6k -3,612
74 SPIREPOINT PRIVATE CLIENT, LLC 0.04% of their portfolio VERO BEACH, FL 17,38017.4k $521.9k $521.9k 0.04% Added +2.5k +2,500
75 Corient Private Wealth LP 0.00% of their portfolio MIAMI, FL 16,94416.9k $508.8k $508.8k 0.00% Reduced -937 -937
76 Amplius Wealth Advisors, LLC 0.03% of their portfolio BLUE BELL, PA 14,52514.5k $436.2k $436.2k 0.03% Reduced -258 -258
77 Delta Investment Management, LLC 0.07% of their portfolio SAN FRANCISCO, CA 13,60013.6k $408.4k $408.4k 0.07% Unchanged
78 1900 WEALTH MANAGEMENT LLC 0.02% of their portfolio SAN ANTONIO, TX 13,52413.5k $406.1k $406.1k 0.02% Unchanged
79 Dakota Wealth Management 0.01% of their portfolio PALM BEACH GARDENS, FL 13,46613.5k $404.4k $404.4k 0.01% Added +248 +248
80 Kestra Advisory Services, LLC 0.00% of their portfolio AUSTIN, TX 13,13913.1k $394.6k $394.6k 0.00% Reduced -18.4k -18,398
81 Creative Planning 0.00% of their portfolio OVERLAND PARK, KS 13,05713.1k $392.1k $392.1k 0.00% Reduced -8.7k -8,734
82 World Investment Advisors 0.00% of their portfolio LINCROFT, NJ 12,96413.0k $287.2k $287.2k 0.00% Unchanged
83 Stablepoint Partners, LLC 0.05% of their portfolio BRAINTREE, MA 12,83212.8k $385.3k $385.3k 0.05% Added +710 +710
84 B. Riley Wealth Advisors, Inc. 0.02% of their portfolio MEMPHIS, TN 12,69612.7k $372.9k $372.9k 0.02% Reduced -142 -142
85 CAPTRUST FINANCIAL ADVISORS 0.00% of their portfolio RALEIGH, NC 12,63312.6k $379.4k $379.4k 0.00% Unchanged
86 Stockman Wealth Management, Inc. 0.04% of their portfolio BILLINGS, MT 12,51512.5k $375.8k $375.8k 0.04% Added +212 +212
87 Painted Porch Advisors LLC 0.16% of their portfolio SANTA BARBARA, CA 12,50412.5k $375.5k $375.5k 0.16% Added +211 +211
88 CSS LLC/IL 0.02% of their portfolio CHICAGO, IL 12,30612.3k $369.5k $369.5k 0.02% Reduced -2.0k -2,000
89 EP Wealth Advisors, LLC 0.00% of their portfolio TORRANCE, CA 12,16312.2k $365.2k $365.2k 0.00% New
90 PREVAIL INNOVATIVE WEALTH ADVISORS, LLC 0.05% of their portfolio LEAWOOD, KS 12,13612.1k $364.4k $364.4k 0.05% New
91 Merit Financial Group, LLC 0.00% of their portfolio ALPHARETTA, GA 12,12212.1k $364.0k $364.0k 0.00% Reduced -2.0k -2,026
92 MATHER GROUP, LLC. 0.00% of their portfolio CHICAGO, IL 12,00012.0k $360.4k $360.4k 0.00% Unchanged
93 D.A. DAVIDSON & CO. 0.00% of their portfolio GREAT FALLS, MT 11,84211.8k $355.6k $355.6k 0.00% New
94 PNC Financial Services Group, Inc. 0.00% of their portfolio Pittsburgh, PA 11,79611.8k $354.2k $354.2k 0.00% Added +1.8k +1,767
95 INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC 0.02% of their portfolio ORLANDO, FL 11,28511.3k $342.8k $342.8k 0.02% Unchanged
96 Focus Partners Wealth 0.00% of their portfolio ST LOUIS, MO 11,06911.1k $332.4k $332.4k 0.00% Added +1.4k +1,414
97 Closed-End Fund Advisors, Inc. 0.31% of their portfolio RICHMOND, VA 10,56710.6k $317.3k $317.3k 0.31% Reduced -214 -214
98 NewEdge Wealth, LLC 0.00% of their portfolio STAMFORD, CT 10,34710.3k $310.7k $310.7k 0.00% Reduced -2.7k -2,719
99 Advocate Investing Services LLC 0.24% of their portfolio WOODBINE, MD 10,30010.3k $309.3k $309.3k 0.24% Unchanged
100 SENTINEL TRUST CO LBA 0.03% of their portfolio HOUSTON, TX 10,02210.0k $301.0k $301.0k 0.03% Unchanged