MXCT · Maxcyte, Inc.

$1.26 -0.01 (-0.79%) At close · Sep 3

Market Cap

$130.04M

103.21M

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.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 123

Total Value: $77,996,452

Total Shares: 63,413,072

Showing 1–100 of 124 holdings by value · page 1 of 2

Institutional Ownership Trend

20 quarters

Holder Concentration

Across 123 13F filers · Δ vs Mar 31, 2026

Top Holder

12.9%

−0.6 pts

Top 5

38.4%

−7.2 pts

Top 10

58.9%

−6.4 pts

HHI

483

Broadly held−114

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -8

Institutional value: +70.2%

Shares held: -2.7%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega JANE STREET GROUP, LLC	+1,542,434	1,563,003
Mega MILLENNIUM MANAGEMENT LLC	+1,161,862	1,204,921
Large MARSHALL WACE, LLP	+915,866	1,014,778
Mega TWO SIGMA INVESTMENTS, LP	+854,779	1,462,941
Small Peapod Lane Capital LLC	+793,559	2,125,752

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mega BlackRock, Inc.	−5,737,513	3,060,960
Mega STATE STREET CORP	−1,676,720	516,750
Small LUMINUS MANAGEMENT LLC	−1,089,396	60,604
Mega GEODE CAPITAL MANAGEMENT, LLC	−1,035,758	1,326,914
Mega VANGUARD PORTFOLIO MANAGEMENT LLC	−628,797	260,443

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mid RBF Capital, LLC	1,322,443	$1,626,604
Large Man Group plc	448,958	$552,218
Mega Qube Research & Technologies Ltd	389,102	$478,595
Large Point72 Asset Management, L.P.	299,853	$368,819
Micro Marquette Asset Management, LLC	285,507	$351,173

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Large FRED ALGER MANAGEMENT, LLC	386,667	$271,826
Small Mink Brook Asset Management LLC	284,024	$199,668
Large VOYA INVESTMENT MANAGEMENT LLC	256,120	$180,052
Mega Nuveen, LLC	218,497	$153,602
Mega D. E. Shaw & Co., Inc.	200,505	$140,955

Filter: New 27 Increased 51 Reduced 28 Sold out 35 Unchanged 17

Showing 100 of 124

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Capricorn Fund Managers Ltd

$10,086,000

12.93%

8,200,000

Vitruvian Partners LLP

$6,203,327

7.95%

5,043,356

VANGUARD CAPITAL MANAGEMENT LLC

$4,958,479

6.36%

4,031,284

MORGAN STANLEY

$4,543,679

5.83%

3,694,049

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	6,484	$7,975	0.2%	Defined
MORGAN STANLEY & CO. LLC	4,846	$5,960	0.1%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	2,414,901	$2,970,328	65.4%	Defined
MORGAN STANLEY INVESTMENT MANAGEMENT INC	1,265,948	$1,557,116	34.3%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	1,870	$2,300	0.1%	Defined

Mudita Advisors LLP

$4,145,947

5.32%

3,370,689

BlackRock, Inc.

$3,764,979

4.83%

3,060,960

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	525,353	$646,184	17.2%	Sole
BlackRock Fund Advisors	239,050	$294,031	7.8%	Sole
BlackRock Institutional Trust Company, N.A.	2,197,511	$2,702,938	71.8%	Sole
BlackRock Japan Co. Ltd	40,793	$50,175	1.3%	Sole
BlackRock Investment Management (UK) Ltd.	49,153	$60,458	1.6%	Sole
Aperio Group, LLC	9,100	$11,193	0.3%	Sole

Brooklands Fund Management Ltd

$3,503,142

4.49%

2,848,083

BNP PARIBAS ASSET MANAGEMENT Holding S.A.

$3,411,471

4.37%

2,773,554

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

Manager	Shares	Value (USD)	% of position	Discretion
AXA INVESTMENT MANAGERS UK LIMITED	2,773,554	$3,411,471	100.0%	Defined

CADIAN CAPITAL MANAGEMENT, LP

$2,707,434

3.47%

2,201,166

Peapod Lane Capital LLC

$2,614,674

3.35%

2,125,752

RENAISSANCE TECHNOLOGIES LLC

$2,350,284

3.01%

1,910,800

AQR CAPITAL MANAGEMENT LLC

$2,315,811

2.97%

1,882,776

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	84	$103	0.0%	Other
Prism Planning Partners LLC	971	$1,194	0.1%	Other
Compound Planning, Inc.	121	$148	0.0%	Other
Arax Advisory Partners	31,051	$38,192	1.6%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	15,662	$19,264	0.8%	Other
Stokes Family Office, LLC	5,483	$6,744	0.3%	Other
Held directly	1,829,404	$2,250,166	97.2%	Defined

JANE STREET GROUP, LLC

$1,922,493

2.46%

1,563,003

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	703,380	$865,157	45.0%	Defined
Jane Street Global Trading, LLC	859,623	$1,057,336	55.0%	Defined

TWO SIGMA INVESTMENTS, LP

$1,799,417

2.31%

1,462,941

GEODE CAPITAL MANAGEMENT, LLC

$1,632,103

2.09%

1,326,914

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	228,972	$281,635	17.3%	Defined
Held directly	1,097,942	$1,350,468	82.7%	Defined

RBF Capital, LLC

$1,626,604

2.09%

1,322,443

GOLDMAN SACHS GROUP INC

$1,527,589

1.96%

1,241,943

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	590,483	$726,294	47.5%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	651,460	$801,295	52.5%	Defined

MILLENNIUM MANAGEMENT LLC

$1,482,052

1.90%

1,204,921

NANO CAP NEW MILLENNIUM GROWTH FUND L P

$1,476,000

1.89%

1,200,000

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

Manager	Shares	Value (USD)	% of position	Discretion
AZG TANGIBLE ASSETS FUND LLC	1,200,000	$1,476,000	100.0%	Sole

MARSHALL WACE, LLP

$1,248,176

1.60%

1,014,778

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

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	1,014,778	$1,248,176	100.0%	Other

Willis Investment Counsel

$1,061,192

1.36%

862,758

CITADEL ADVISORS LLC

$1,053,270

1.35%

856,318

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	604,112	$743,057	70.5%	Defined
Held directly	252,206	$310,213	29.5%	Defined

Stonepine Capital Management, LLC

$924,475

1.19%

751,606

VANGUARD FIDUCIARY TRUST CO

$803,439

1.03%

653,203

George Kaiser Family Foundation

$771,869

0.99%

627,536

GSA CAPITAL PARTNERS LLP

$683,811

0.88%

555,944

STATE STREET CORP

$635,602

0.81%

516,750

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	516,750	$635,602	100.0%	Defined

Man Group plc

$552,218

0.71%

448,958

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

Manager	Shares	Value (USD)	% of position	Discretion
Numeric Investors LLC	448,958	$552,218	100.0%	Defined

Qube Research & Technologies Ltd

$478,595

0.61%

389,102

Apollo Management Holdings, L.P.

$378,824

0.49%

307,987

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

Manager	Shares	Value (USD)	% of position	Discretion
Apollo Capital Management, L.P.	307,987	$378,824	100.0%	Defined

Point72 Asset Management, L.P.

$368,819

0.47%

299,853

Marquette Asset Management, LLC

$351,173

0.45%

285,507

UBS Group AG

$349,654

0.45%

284,273

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	1,589	$1,954	0.6%	Defined
UBS AG	274,939	$338,174	96.7%	Defined
UBS Securities LLC	7,745	$9,526	2.7%	Defined

DIMENSIONAL FUND ADVISORS LP

$333,009

0.43%

270,740

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

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	12,258	$15,077	4.5%	Defined
DFA Australia Ltd.	2,844	$3,498	1.1%	Defined
Dimensional Ireland Ltd	79,824	$98,183	29.5%	Defined
Held directly	175,814	$216,251	64.9%	Sole

JACOBS LEVY EQUITY MANAGEMENT, INC

$332,425

0.43%

270,265

NORTHERN TRUST CORP

$325,843

0.42%

264,914

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	264,914	$325,843	100.0%	Defined

VANGUARD PORTFOLIO MANAGEMENT LLC

$320,344

0.41%

260,443

IEQ CAPITAL, LLC

$292,693

0.38%

237,962

XTX Topco Ltd

$254,105

0.33%

206,590

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	206,590	$254,105	100.0%	Defined

Rathbones Group PLC

$247,034

0.32%

200,841

FMR LLC

$221,815

0.28%

180,338

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	40,036	$49,244	22.2%	Defined
FIAM LLC	140,302	$172,571	77.8%	Defined

Aster Capital Management (DIFC) Ltd

$200,822

0.26%

163,270

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$193,100

0.25%

156,992

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	156,992	$193,100	100.0%	Other

HSBC HOLDINGS PLC

$191,635

0.25%

155,801

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

Manager	Shares	Value (USD)	% of position	Discretion
HSBC BANK PLC	155,801	$191,635	100.0%	Defined

Callan Family Office, LLC

$189,802

0.24%

154,311

BARCLAYS PLC

$183,285

0.23%

149,013

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

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	142,387	$175,136	95.6%	Defined
BARCLAYS CAPITAL INC.	6,255	$7,693	4.2%	Defined
BARCLAYS CAPITAL SECURITIES LTD	371	$456	0.2%	Defined

HRT FINANCIAL LP

$149,080

0.19%

121,204

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$144,146

0.18%

117,192

Quadrature Capital Ltd

$129,784

0.17%

105,516

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

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	105,516	$129,784	100.0%	Other

BANK OF AMERICA CORP /DE/

$123,880

0.16%

100,716

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

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	43,845	$53,929	43.5%	Defined
BOFA SECURITIES, INC.	56,871	$69,951	56.5%	Defined

J. Goldman & Co LP

$122,665

0.16%

99,728

CITADEL ADVISORS LLC

$122,262

0.16%

99,400

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	99,400	$122,262	100.0%	Defined

Cerity Partners LLC

$120,364

0.15%

97,858

Mariner, LLC

$118,906

0.15%

96,672

PANAGORA ASSET MANAGEMENT INC

$109,802

0.14%

89,270

CABOT WEALTH MANAGEMENT INC

$109,006

0.14%

88,623

Bank of New York Mellon Corp

$98,817

0.13%

80,340

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

Manager	Shares	Value (USD)	% of position	Discretion
The Bank of New York Mellon	80,339	$98,816	100.0%	Defined
Held directly	1	$1	0.0%	Defined

AMERIPRISE FINANCIAL INC

$97,749

0.13%

79,472

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

Manager	Shares	Value (USD)	% of position	Discretion
Columbia Management Investment Advisers, LLC	79,412	$97,676	99.9%	Defined
Ameriprise Financial Services, LLC	60	$73	0.1%	Defined

TUDOR INVESTMENT CORP ET AL

$96,324

0.12%

78,313

Jain Global LLC

$88,430

0.11%

71,895

Vanguard Personalized Indexing Management, LLC

$77,480

0.10%

62,992

Catalyst Funds Management Pty Ltd

$75,891

0.10%

61,700

LUMINUS MANAGEMENT LLC

$74,542

0.10%

60,604

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$70,589

0.09%

57,390

Waverly Advisors, LLC

$66,437

0.09%

54,014

Tower Research Capital LLC (TRC)

$66,335

0.09%

53,931

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)	53,931	$66,335	100.0%	Defined

RHUMBLINE ADVISERS

$59,006

0.08%

47,973

MERCER GLOBAL ADVISORS INC /ADV

$58,739

0.08%

47,756

PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO

$53,874

0.07%

43,800

JMN Financial LLC

$51,461

0.07%

41,839

Vanguard Global Advisers, LLC

$50,430

0.06%

41,000

CANADA PENSION PLAN INVESTMENT BOARD

$43,911

0.06%

35,700

Creative Planning

$40,521

0.05%

32,944

Arax Advisory Partners

$38,594

0.05%

31,378

CAPTRUST FINANCIAL ADVISORS

$38,553

0.05%

31,344

KWMG, LLC

$31,774

0.04%

25,833

BRIGHTON JONES LLC

$29,713

0.04%

24,157

Y-Intercept (Hong Kong) Ltd

$28,826

0.04%

23,436

PNC FINANCIAL SERVICES GROUP, INC.

$28,300

0.04%

23,010

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

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	23,010	$28,300	100.0%	Defined

Jump Financial, LLC

$27,306

0.04%

22,200

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

Manager	Shares	Value (USD)	% of position	Discretion
Jump Trading Holdings, LLC joint	22,200	$27,306	100.0%	Defined

STIFEL FINANCIAL CORP

$25,372

0.03%

20,628

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

Manager	Shares	Value (USD)	% of position	Discretion
STIFEL NICOLAUS & CO INC \MO\	20,000	$24,600	97.0%	Defined
Held directly	628	$772	3.0%	Defined

R Squared Ltd

$24,329

0.03%

19,780

BNP PARIBAS ARBITRAGE, SA

$22,233

0.03%

18,076

Granite Investment Partners, LLC

$21,479

0.03%

17,463

Focus Partners Wealth

$20,806

0.03%

16,916

Jefferies Financial Group Inc.

$19,645

0.03%

15,972

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

Manager	Shares	Value (USD)	% of position	Discretion
JEFFERIES LLC joint	15,972	$19,645	100.0%	Defined

Spark Investment Management LLC

$19,557

0.03%

15,900

Pallas Capital Advisors LLC

$19,223

0.02%

15,629

Squarepoint Ops LLC

$18,258

0.02%

14,844

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

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	14,844	$18,258	100.0%	Defined

Merit Financial Group, LLC

$18,024

0.02%

14,654

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

Manager	Shares	Value (USD)	% of position	Discretion
AQR Capital Management	13,087	$16,097	89.3%	Other
Held directly	1,567	$1,927	10.7%	Sole

Balyasny Asset Management L.P.

$16,664

0.02%

13,548

BLAIR WILLIAM & CO/IL

$14,844

0.02%

12,069

COLDSTREAM CAPITAL MANAGEMENT INC

$14,698

0.02%

11,950

VICTORY CAPITAL MANAGEMENT INC

$14,092

0.02%

11,457

Integrated Wealth Concepts LLC

$12,116

0.02%

9,851

ROYAL BANK OF CANADA

$10,065

0.01%

8,184

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

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	54	$66	0.7%	Defined
RBC Capital Markets, LLC	8,001	$9,841	97.8%	Defined
Held directly	129	$158	1.6%	Sole

GAMMA Investing LLC

$7,013

0.01%

5,702

Allworth Financial LP

$5,606

0.01%

4,558

TrinityBridge Ltd

$4,920

0.01%

4,000

Russell Investments Group, Ltd.

$4,884

0.01%

3,971

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

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	3,971	$4,884	100.0%	Defined

Key facts CIK 1287098 CUSIP 57777K106 13F (30d) 103 filings 102 filers Visit website