QSI · Quantum-Si Inc

$0.76 +0.00 (+0.00%)

Market Cap

$165.76M

218.88M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Quarter:

Holders: 141

Total Value: $47,649,590

Total Shares: 53,841,449

Showing 1–100 of 147 holdings by value · page 1 of 2

Institutional Ownership Trend

23 quarters

Holder Concentration

Across 141 13F filers · Δ vs Mar 31, 2026

Top Holder

14.1%

−6.8 pts

Top 5

51.5%

−4.8 pts

Top 10

75.1%

−2.5 pts

HHI

712

Broadly held−174

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -17

Institutional value: -4.0%

Shares held: -16.0%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega JANE STREET GROUP, LLC	+2,141,235	2,423,835
Mega UBS Group AG	+859,370	2,561,897
Mega VANGUARD CAPITAL MANAGEMENT LLC	+556,301	7,578,208
Large RENAISSANCE TECHNOLOGIES LLC	+435,971	553,871
Mega BNP PARIBAS ARBITRAGE, SA	+360,208	398,598

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega BlackRock, Inc.	−8,189,597	5,225,352
Mega STATE STREET CORP	−2,879,948	890,741
Mega GEODE CAPITAL MANAGEMENT, LLC	−1,598,595	2,236,526
Mega VANGUARD PORTFOLIO MANAGEMENT LLC	−1,023,548	497,098
Mega NORTHERN TRUST CORP	−810,170	450,531

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega MILLENNIUM MANAGEMENT LLC	3,131,726	$2,771,577
Small Aster Capital Management (DIFC) Ltd	344,510	$304,891
Large HRT FINANCIAL LP	93,647	$82,877
Mid Y-Intercept (Hong Kong) Ltd	79,089	$69,993
Mid WINTON GROUP Ltd	75,800	$67,083

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mega ALLIANCEBERNSTEIN L.P.	272,180	$210,667
Large CIBC Bancorp USA Inc.	208,510	$161,386
Large CWM, LLC	126,632	$98,013
Mega DEUTSCHE BANK AG\	119,028	$92,127
Large LOS ANGELES CAPITAL MANAGEMENT LLC	116,341	$90,047

Filter: New 26 Increased 35 Reduced 58 Sold out 43 Unchanged 22

Showing 100 of 147

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

VANGUARD CAPITAL MANAGEMENT LLC

$6,706,714

14.08%

7,578,208

ARK Investment Management LLC

$6,343,448

13.31%

7,167,738

BlackRock, Inc.

$4,624,433

9.71%

5,225,352

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	213,758	$189,175	4.1%	Sole
BlackRock Investment Management, LLC	176	$155	0.0%	Sole
BlackRock Fund Advisors	1,641,869	$1,453,054	31.4%	Sole
BlackRock Institutional Trust Company, N.A.	3,221,675	$2,851,182	61.7%	Sole
BlackRock Investment Management (UK) Ltd.	9,098	$8,051	0.2%	Sole
BlackRock Asset Management Ireland Ltd	136,171	$120,511	2.6%	Sole
Aperio Group, LLC	2,605	$2,305	0.0%	Sole

Sumitomo Mitsui Trust Group, Inc.

$3,438,428

7.22%

3,885,230

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Amova Asset Management Co., Ltd.	3,885,230	$3,438,428	100.0%	Defined

Amova Asset Management Americas, Inc.

$3,438,428

7.22%

3,885,230

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Sumitomo Mitsui Trust Group, Inc. joint	3,885,230	$3,438,428	100.0%	Sole

MILLENNIUM MANAGEMENT LLC

$2,771,577

5.82%

3,131,726

UBS Group AG

$2,267,277

4.76%

2,561,897

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	1,010	$893	0.0%	Defined
UBS AG	2,522,667	$2,232,560	98.5%	Defined
UBS Switzerland AG	38,220	$33,824	1.5%	Defined

AQR CAPITAL MANAGEMENT LLC

$2,078,564

4.36%

2,348,665

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	179	$158	0.0%	Other
Prism Planning Partners LLC	87	$76	0.0%	Other
Compound Planning, Inc.	213	$188	0.0%	Other
Arax Advisory Partners	36,011	$31,869	1.5%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	20,140	$17,823	0.9%	Other
Stokes Family Office, LLC	10,698	$9,467	0.5%	Other
Held directly	2,281,337	$2,018,983	97.1%	Defined

GEODE CAPITAL MANAGEMENT, LLC

$1,979,324

4.15%

2,236,526

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	395,461	$349,982	17.7%	Defined
Held directly	1,841,065	$1,629,342	82.3%	Defined

JANE STREET GROUP, LLC

$1,896,320

3.98%

2,142,735

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	1,110,709	$982,977	51.8%	Defined
Jane Street Global Trading, LLC	1,032,026	$913,343	48.2%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$988,323

2.07%

1,116,750

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	1,116,750	$988,323	100.0%	Other

VANGUARD FIDUCIARY TRUST CO

$988,264

2.07%

1,116,683

STATE STREET CORP

$788,305

1.65%

890,741

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SSGA FUNDS MANAGEMENT, INC. joint	890,741	$788,305	100.0%	Defined

Fosun International Ltd

$658,382

1.38%

743,935

RENAISSANCE TECHNOLOGIES LLC

$490,175

1.03%

553,871

VANGUARD PORTFOLIO MANAGEMENT LLC

$439,931

0.92%

497,098

GOLDMAN SACHS GROUP INC

$421,513

0.88%

476,288

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	312,548	$276,604	65.6%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	163,740	$144,909	34.4%	Defined

NORTHERN TRUST CORP

$398,719

0.84%

450,531

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	450,531	$398,719	100.0%	Defined

Invesco Ltd.

$392,877

0.82%

443,929

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	6,895	$6,102	1.6%	Defined
Invesco Capital Management LLC	437,034	$386,775	98.4%	Defined

BNP PARIBAS ARBITRAGE, SA

$352,759

0.74%

398,598

IEQ CAPITAL, LLC

$310,472

0.65%

350,816

Aster Capital Management (DIFC) Ltd

$304,891

0.64%

344,510

MORGAN STANLEY

$286,279

0.60%

323,482

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	20,567	$18,201	6.4%	Defined
MORGAN STANLEY & CO. LLC	3,429	$3,034	1.1%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	269,882	$238,845	83.4%	Defined
MORGAN STANLEY SMITH BARNEY LLC	29,250	$25,886	9.0%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	354	$313	0.1%	Defined

IQ EQ FUND MANAGEMENT (IRELAND) Ltd

$284,203

0.60%

321,134

Knollwood Investment Advisory, LLC

$265,500

0.56%

300,000

IMC-Chicago, LLC

$252,895

0.53%

285,758

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$219,922

0.46%

248,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	248,500	$219,922	100.0%	Other

JANE STREET GROUP, LLC

$218,860

0.46%

247,300

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	247,300	$218,860	100.0%	Defined

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$182,398

0.38%

206,100

BARCLAYS PLC

$182,035

0.38%

205,690

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	193,465	$171,216	94.1%	Defined
BARCLAYS CAPITAL INC.	12,225	$10,819	5.9%	Defined

CITADEL ADVISORS LLC

$160,185

0.34%

181,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	181,000	$160,185	100.0%	Defined

XTX Topco Ltd

$157,246

0.33%

177,680

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	177,680	$157,246	100.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$152,397

0.32%

172,200

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	172,200	$152,397	100.0%	Other

SIMPLEX TRADING, LLC

$146,284

0.31%

165,293

Verdence Capital Advisors LLC

$140,099

0.29%

158,305

Mariner, LLC

$139,554

0.29%

157,689

Shay Capital LLC

$133,565

0.28%

150,922

FMR LLC

$109,532

0.23%

123,767

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	123,740	$109,509	100.0%	Defined
STRATEGIC ADVISERS LLC	27	$23	0.0%	Defined

CITADEL ADVISORS LLC

$95,226

0.20%

107,600

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	107,600	$95,226	100.0%	Defined

GROUP ONE TRADING LLC

$95,113

0.20%

107,473

JONES FINANCIAL COMPANIES LLLP

$88,927

0.19%

100,483

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	100,483	$88,927	100.0%	Sole

HRT FINANCIAL LP

$82,877

0.17%

93,647

AlphaCore Capital LLC

$79,090

0.17%

89,368

Cerity Partners LLC

$75,531

0.16%

85,347

Vanguard Global Advisers, LLC

$75,009

0.16%

84,757

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$74,881

0.16%

84,612

Y-Intercept (Hong Kong) Ltd

$69,993

0.15%

79,089

JTC Employer Solutions Trustee Ltd

$68,841

0.14%

77,787

MERCER GLOBAL ADVISORS INC /ADV

$68,390

0.14%

77,277

RHUMBLINE ADVISERS

$67,250

0.14%

75,989

WINTON GROUP Ltd

$67,083

0.14%

75,800

CAPTRUST FINANCIAL ADVISORS

$64,718

0.14%

73,128

HOLLENCREST CAPITAL MANAGEMENT

$57,534

0.12%

65,011

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$56,139

0.12%

63,435

GSA CAPITAL PARTNERS LLP

$53,109

0.11%

60,011

BANK OF AMERICA CORP /DE/

$52,732

0.11%

59,585

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BOFA SECURITIES, INC.	59,585	$52,732	100.0%	Defined

Creative Planning

$49,457

0.10%

55,884

Atom Investors LP

$45,625

0.10%

51,554

Green Alpha Advisors, LLC

$40,640

0.09%

45,921

CITADEL ADVISORS LLC

$39,236

0.08%

44,335

Sanctuary Advisors, LLC

$36,636

0.08%

41,397

Stratos Wealth Advisors, LLC

$35,431

0.07%

40,036

Point72 Asset Management, L.P.

$34,632

0.07%

39,133

BRIGHTON JONES LLC

$34,147

0.07%

38,585

Corient Private Wealth LLC

$33,920

0.07%

38,328

Cambridge Investment Research Advisors, Inc.

$33,460

0.07%

37,809

Red Wave Investments LLC

$32,745

0.07%

37,000

Arax Advisory Partners

$32,559

0.07%

36,790

JANE STREET GROUP, LLC

$29,913

0.06%

33,800

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	33,800	$29,913	100.0%	Defined

SBI Securities Co., Ltd.

$29,212

0.06%

33,009

China Universal Asset Management Co., Ltd.

$27,863

0.06%

31,484

Kovack Advisors, Inc.

$27,435

0.06%

31,000

IPG Investment Advisors LLC

$27,314

0.06%

30,864

Nuveen, LLC

$26,618

0.06%

30,077

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	30,077	$26,618	100.0%	Defined

Northern Lights Advisors, Inc.

$26,540

0.06%

29,989

COMMONWEALTH EQUITY SERVICES, LLC

$23,983

0.05%

27,100

Wealth Management Associates, Inc.

$23,319

0.05%

26,350

Tower Research Capital LLC (TRC)

$21,025

0.04%

23,758

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	23,758	$21,025	100.0%	Defined

Merit Financial Group, LLC

$20,899

0.04%

23,616

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AQR Capital Management	21,569	$19,088	91.3%	Other
Held directly	2,047	$1,811	8.7%	Sole

Pallas Capital Advisors LLC

$20,638

0.04%

23,320

Leonteq Securities AG

$19,912

0.04%

22,500

HBW ADVISORY SERVICES LLC

$19,728

0.04%

22,292

NEUBERGER BERMAN GROUP LLC

$19,262

0.04%

21,766

LPL Financial LLC

$18,571

0.04%

20,985

Vanguard Personalized Indexing Management, LLC

$18,009

0.04%

20,350

Capital Investment Advisory Services, LLC

$17,700

0.04%

20,000

VICTORY CAPITAL MANAGEMENT INC

$17,372

0.04%

19,630

DLK Investment Management, LLC

$16,815

0.04%

19,000

ANCHYRA PARTNERS LLC

$16,791

0.04%

18,974

Bank of New York Mellon Corp

$16,641

0.03%

18,805

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	2,200	$1,947	11.7%	Defined
The Bank of New York Mellon	16,604	$14,694	88.3%	Defined
Held directly	1	$0	0.0%	Defined

SG Americas Securities, LLC

$15,491

0.03%

17,505

Focus Partners Wealth

$15,238

0.03%

17,219

JPMORGAN CHASE & CO

$15,107

0.03%

17,071

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
J.P. Morgan Investment Management Inc.	388	$343	2.3%	Defined
J.P. Morgan Securities plc	16,683	$14,764	97.7%	Defined

Flagship Private Wealth, LLC

$12,529

0.03%

14,158

Procyon Advisors, LLC

$12,098

0.03%

13,671

Balyasny Asset Management L.P.

$12,061

0.03%

13,629

RAYMOND JAMES FINANCIAL INC

$11,512

0.02%

13,008

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RAYMOND JAMES & ASSOCIATES	7,000	$6,195	53.8%	Defined
Raymond James Financial Services Advisors, Inc.	6,008	$5,317	46.2%	Defined

Laurion Capital Management LP

$11,282

0.02%

12,749

Callan Family Office, LLC

$10,725

0.02%

12,119

Jefferies Financial Group Inc.

$10,044

0.02%

11,350

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JEFFERIES LLC	11,350	$10,044	100.0%	Defined

Key facts CIK 1816431 CUSIP 74765K105 13F (30d) 105 filings 104 filers Visit website Investor relations