Equibles

QSI

Quantum-Si Inc

Company with tickers: QSI, QSIAW

CIK
1816431
CUSIP
74765K105
Shares Outstanding
197,822,663
13F Activity (30d)
120 filings 118 filers
Holders: 157
Total Value: $49,610,355
Total Shares: 64,096,190
Showing 1–100 of 164 holdings by value · page 1 of 2

Institutional Ownership Trend

20 quarters

Holder Concentration

Across 157 13F filers · Δ vs Dec 31, 2025
Top Holder
20.9%
Jun 2023 → Mar 2026 · range 15.7% – 24.9%
+2.1 pts
Top 5
56.3%
Jun 2023 → Mar 2026 · range 56.3% – 73.5%
−0.1 pts
Top 10
77.6%
Jun 2023 → Mar 2026 · range 77.3% – 90.5%
−2.2 pts
HHI
887
Jun 2023 → Mar 2026 · range 805 – 1,281
Broadly held +12

Quarterly Activity

vs Dec 31, 2025
New
43
Increased
40
Decreased
38
Sold Out
24
Unchanged
36
Holder count: +19
Institutional value: -34.9%
Shares held: -7.5%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega AQR CAPITAL MANAGEMENT LLC +2,305,490 2,392,179
Mega BlackRock, Inc. +360,892 13,414,949
Mega UBS Group AG +253,015 1,702,527
Mega STATE STREET CORP +207,968 3,770,689
Large Mariner, LLC +142,812 199,692

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega CITADEL ADVISORS LLC −3,273,551 219,546
Mega TWO SIGMA INVESTMENTS, LP −1,331,257 52,924
Mega JANE STREET GROUP, LLC −1,152,233 282,600
Mega NORTHERN TRUST CORP −947,235 1,260,701
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP −915,617 1,939,968

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 7,021,907 $5,434,956
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 1,520,646 $1,176,980
Mega VANGUARD FIDUCIARY TRUST CO 1,117,252 $864,753
Large IEQ CAPITAL, LLC 357,688 $276,850
Mid IMC-Chicago, LLC 220,876 $170,958

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Mega VANGUARD GROUP INC 9,607,022 $10,567,723
Mid Quadrature Capital Ltd 276,889 $304,577
Mega MILLENNIUM MANAGEMENT LLC 191,791 $210,970
Large HRT FINANCIAL LP 104,292 $114,721
Small Scientech Research LLC 45,915 $50,506
Filter: New 43 Increased 40 Reduced 38 Sold out 24 Unchanged 36
Showing 100 of 164
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $10,383,168 20.93% 13,414,949
Mega VANGUARD CAPITAL MANAGEMENT LLC $5,434,956 10.96% 7,021,907
Large ARK Investment Management LLC $5,324,267 10.73% 6,878,899
Mega Sumitomo Mitsui Trust Group, Inc. $3,399,149 6.85% 4,391,666
Mid Amova Asset Management Americas, Inc. $3,399,149 6.85% 4,391,666
Mega GEODE CAPITAL MANAGEMENT, LLC $2,968,383 5.98% 3,835,121
Mega STATE STREET CORP $2,918,513 5.88% 3,770,689
Mega AQR CAPITAL MANAGEMENT LLC $1,851,541 3.73% 2,392,179
Mega UBS Group AG $1,317,753 2.66% 1,702,527
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $1,176,980 2.37% 1,520,646
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,133,575 2.28% 1,464,568
Mega NORTHERN TRUST CORP Bank $975,782 1.97% 1,260,701
Mega VANGUARD FIDUCIARY TRUST CO Bank $864,753 1.74% 1,117,252
Small Fosun International Ltd $575,805 1.16% 743,935
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $354,159 0.71% 457,571
Mega Nuveen, LLC $349,357 0.70% 451,367
Mega GOLDMAN SACHS GROUP INC $343,792 0.69% 444,177
Mega Invesco Ltd. $314,776 0.63% 406,690
Mid XTX Topco Ltd $301,282 0.61% 389,254
Mega Bank of New York Mellon Corp Bank $296,509 0.60% 383,088
Large IEQ CAPITAL, LLC $276,850 0.56% 357,688
Small Knollwood Investment Advisory, LLC $232,200 0.47% 300,000
Mid IQ EQ FUND MANAGEMENT (IRELAND) Ltd $226,090 0.46% 292,107
Mid GROUP ONE TRADING LLC $219,801 0.44% 283,981
Mega ALLIANCEBERNSTEIN L.P. $210,667 0.42% 272,180
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $202,091 0.41% 261,100
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $194,815 0.39% 251,700
Mega JANE STREET GROUP, LLC $194,661 0.39% 251,500
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $173,143 0.35% 223,700
Mid IMC-Chicago, LLC $170,958 0.34% 220,876
Large CIBC Bancorp USA Inc. Bank $161,386 0.33% 208,510
Mid Verdence Capital Advisors LLC $157,783 0.32% 203,855
Large Mariner, LLC $154,561 0.31% 199,692
Mega RHUMBLINE ADVISERS $149,434 0.30% 193,068
Mega BANK OF AMERICA CORP /DE/ Bank $125,377 0.25% 161,987
Mid Shay Capital LLC $116,813 0.24% 150,922
Mega MORGAN STANLEY $100,572 0.20% 129,940
Mid AlphaCore Capital LLC $99,419 0.20% 128,449
Large CWM, LLC $98,013 0.20% 126,632
Mega DEUTSCHE BANK AG\ Bank $92,127 0.19% 119,028
Large RENAISSANCE TECHNOLOGIES LLC $91,254 0.18% 117,900
Large LOS ANGELES CAPITAL MANAGEMENT LLC $90,047 0.18% 116,341
Mega CITADEL ADVISORS LLC $88,081 0.18% 113,800
Large JONES FINANCIAL COMPANIES LLLP $85,062 0.17% 109,900
Large MetLife Investment Management, LLC $78,603 0.16% 101,555
Mega PRICE T ROWE ASSOCIATES INC /MD/ $74,680 0.15% 96,486
Mid SIMPLEX TRADING, LLC $70,070 0.14% 90,531
Mega CITADEL ADVISORS LLC $69,814 0.14% 90,200
Large WEALTH ENHANCEMENT ADVISORY SERVICES, LLC $69,300 0.14% 89,536
Mega Vanguard Global Advisers, LLC $65,601 0.13% 84,757
Mega JPMORGAN CHASE & CO $64,643 0.13% 83,519
Large Cerity Partners LLC $62,421 0.13% 80,650
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $57,994 0.12% 74,928
Large CAPTRUST FINANCIAL ADVISORS $53,433 0.11% 69,036
Mid Virtu Financial LLC $50,117 0.10% 64,751
Mega WELLS FARGO & COMPANY/MN $49,433 0.10% 63,868
Mid Quantbot Technologies LP $45,248 0.09% 58,461
Large MERCER GLOBAL ADVISORS INC /ADV $42,720 0.09% 55,195
Mega TWO SIGMA INVESTMENTS, LP $40,963 0.08% 52,924
Large Creative Planning $40,672 0.08% 52,548
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $36,728 0.07% 47,453
Mid INTECH INVESTMENT MANAGEMENT LLC $35,980 0.07% 46,486
Large Police & Firemen's Retirement System of New Jersey Pension $35,735 0.07% 46,170
Small Green Alpha Advisors, LLC $33,442 0.07% 43,208
Mid Sanctuary Advisors, LLC $33,145 0.07% 42,824
Large Cambridge Investment Research Advisors, Inc. $32,360 0.07% 41,809
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $31,952 0.06% 41,282
Mid NINE MASTS CAPITAL Ltd $31,837 0.06% 41,134
Mid HOLLENCREST CAPITAL MANAGEMENT $31,045 0.06% 40,111
Mega BARCLAYS PLC $30,292 0.06% 39,137
Mega BNP PARIBAS ARBITRAGE, SA $29,713 0.06% 38,390
Micro Red Wave Investments LLC $28,638 0.06% 37,000
Mid Merit Financial Group, LLC $28,131 0.06% 36,347
Mid China Universal Asset Management Co., Ltd. $26,859 0.05% 34,702
Mid JTC Employer Solutions Trustee Ltd $26,733 0.05% 34,540
Large SG Americas Securities, LLC Broker-Dealer $26,065 0.05% 33,677
Large ProShare Advisors LLC $25,726 0.05% 33,239
Large SEI INVESTMENTS CO $25,621 0.05% 33,103
Mid SBI Securities Co., Ltd. Broker-Dealer $24,870 0.05% 32,133
Mega FMR LLC $24,743 0.05% 31,968
Mega JANE STREET GROUP, LLC $24,071 0.05% 31,100
Mid Kovack Advisors, Inc. $23,220 0.05% 30,000
Micro Northern Lights Advisors, Inc. $23,211 0.05% 29,989
Large COMMONWEALTH EQUITY SERVICES, LLC $23,059 0.05% 29,792
Large VOYA INVESTMENT MANAGEMENT LLC $21,088 0.04% 27,246
Small Wealth Management Associates, Inc. $20,859 0.04% 26,950
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $20,189 0.04% 26,084
Mid Pallas Capital Advisors LLC $19,935 0.04% 25,757
Mid Leonteq Securities AG Broker-Dealer $19,350 0.04% 25,000
Mid Tower Research Capital LLC (TRC) $19,305 0.04% 24,943
Mid Vanguard Personalized Indexing Management, LLC $18,569 0.04% 23,991
Large Walleye Capital LLC $18,266 0.04% 23,600
Large Focus Partners Wealth $18,202 0.04% 23,517
Small HBW ADVISORY SERVICES LLC $17,567 0.04% 22,697
Mega LPL Financial LLC $17,389 0.04% 22,467
Large Walleye Trading LLC $16,950 0.03% 21,900
Large PRUDENTIAL FINANCIAL INC $16,695 0.03% 21,570
Small Capital Investment Advisory Services, LLC $15,480 0.03% 20,000
Mega VICTORY CAPITAL MANAGEMENT INC $15,331 0.03% 19,808
Small DLK Investment Management, LLC $12,964 0.03% 16,750
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