MASS · 908 Devices Inc.

$10.05 +0.01 (+0.10%)

Russell 2000 member Rebalance outlook locked

Market Cap

$412.92M

41.33M

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: 111

Total Value: $243,615,439

Total Shares: 28,001,782

Showing 1–100 of 112 holdings by value · page 1 of 2

Institutional Ownership Trend

23 quarters

Holder Concentration

Across 111 13F filers · Δ vs Mar 31, 2026

Top Holder

22.4%

+0.7 pts

Top 5

60.6%

+2.5 pts

Top 10

75.8%

+3.7 pts

HHI

1,020

Broadly held+28

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: -1

Institutional value: +42.4%

Shares held: +0.2%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mid NEEDHAM INVESTMENT MANAGEMENT LLC	+580,620	1,820,620
Mega AMERICAN CENTURY COMPANIES INC	+303,954	359,848
Mega BANK OF AMERICA CORP /DE/	+225,949	251,027
Mid First Light Asset Management, LLC	+210,241	6,282,804
Mega BlackRock, Inc.	+176,920	1,944,236

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Mid AWM Investment Company, Inc.	−320,151	4,879,773
Mid GSA CAPITAL PARTNERS LLP	−201,868	49,160
Large Squarepoint Ops LLC	−175,454	37,739
Large SEI INVESTMENTS CO	−87,175	77,719
Mega CITADEL ADVISORS LLC	−81,800	62,747

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega D. E. Shaw & Co., Inc.	75,446	$656,380
Large ACADIAN ASSET MANAGEMENT LLC	70,374	$612,253
Mid Brevan Howard Capital Management LP	20,692	$180,020
Micro PIER 88 INVESTMENT PARTNERS LLC	14,200	$123,540
Mid Magnetar Financial LLC	13,815	$120,189

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid Tao Capital Management LP	568,981	$3,482,163
Small GM Advisory Group, LLC	238,218	$1,457,894
Small Legato Capital Management LLC	153,450	$939,114
Mega MILLENNIUM MANAGEMENT LLC	142,422	$871,622
Large Trexquant Investment LP	73,194	$447,947

Filter: New 15 Increased 43 Reduced 35 Sold out 16 Unchanged 18

Showing 100 of 112

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

First Light Asset Management, LLC

$54,660,394

22.44%

6,282,804

AWM Investment Company, Inc.

$42,454,025

17.43%

4,879,773

ARK Investment Management LLC

$17,642,904

7.24%

2,027,920

BlackRock, Inc.

$16,914,850

6.94%

1,944,236

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	5,286	$45,988	0.3%	Sole
BlackRock Investment Management, LLC	84,598	$736,002	4.4%	Sole
BLACKROCK ADVISORS LLC	62,912	$547,334	3.2%	Sole
BlackRock Fund Advisors	1,127,479	$9,809,067	58.0%	Sole
BlackRock Institutional Trust Company, N.A.	661,654	$5,756,389	34.0%	Sole
Aperio Group, LLC	2,307	$20,070	0.1%	Sole

NEEDHAM INVESTMENT MANAGEMENT LLC

$15,839,394

6.50%

1,820,620

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

Manager	Shares	Value (USD)	% of position	Discretion
NEEDHAM EMERGING GROWTH PARTNERS LP	120,000	$1,044,000	6.6%	Defined
Needham Small Cap Growth Fund	252,970	$2,200,839	13.9%	Defined
Needham Aggressive Growth Fund	1,397,650	$12,159,555	76.8%	Defined
Held directly	50,000	$435,000	2.7%	Sole

VANGUARD CAPITAL MANAGEMENT LLC

$11,236,659

4.61%

1,291,570

First Eagle Investment Management, LLC

$8,090,869

3.32%

929,985

GEODE CAPITAL MANAGEMENT, LLC

$6,627,633

2.72%

761,797

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	107,627	$936,354	14.1%	Defined
Held directly	654,170	$5,691,279	85.9%	Defined

Granahan Investment Management, LLC

$6,021,200

2.47%

692,092

STATE STREET CORP

$5,277,072

2.17%

606,560

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

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	606,560	$5,277,072	100.0%	Defined

ESSEX INVESTMENT MANAGEMENT CO LLC

$4,091,122

1.68%

470,244

MORGAN STANLEY

$3,515,476

1.44%

404,078

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	31	$269	0.0%	Defined
MORGAN STANLEY & CO. LLC	8,133	$70,757	2.0%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	123,093	$1,070,909	30.5%	Defined
MORGAN STANLEY SMITH BARNEY LLC	4,567	$39,732	1.1%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	268,254	$2,333,809	66.4%	Defined

Prescott Group Capital Management, L.L.C.

$3,145,876

1.29%

361,595

Meros Investment Management, LP

$3,143,901

1.29%

361,368

AMERICAN CENTURY COMPANIES INC

$3,130,677

1.29%

359,848

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

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	359,848	$3,130,677	100.0%	Defined

HighMark Wealth Management LLC

$2,956,112

1.21%

339,783

NORTHERN TRUST CORP

$2,317,827

0.95%

266,417

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	261,719	$2,276,955	98.2%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	4,698	$40,872	1.8%	Other

BANK OF AMERICA CORP /DE/

$2,183,934

0.90%

251,027

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	19,965	$173,695	8.0%	Defined
BOFA SECURITIES, INC.	231,062	$2,010,239	92.0%	Defined

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$2,034,860

0.84%

233,892

Sumitomo Mitsui Trust Group, Inc.

$1,989,524

0.82%

228,681

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.	228,681	$1,989,524	100.0%	Defined

Amova Asset Management Americas, Inc.

$1,989,524

0.82%

228,681

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	228,681	$1,989,524	100.0%	Sole

VANGUARD PORTFOLIO MANAGEMENT LLC

$1,695,264

0.70%

194,858

RENAISSANCE TECHNOLOGIES LLC

$1,669,530

0.69%

191,900

VANGUARD FIDUCIARY TRUST CO

$1,618,687

0.66%

186,056

RAYMOND JAMES FINANCIAL INC

$1,455,926

0.60%

167,348

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

Manager	Shares	Value (USD)	% of position	Discretion
Raymond James Financial Services Advisors, Inc.	981	$8,534	0.6%	Defined
ClariVest Asset Management LLC joint	166,367	$1,447,392	99.4%	Defined

Russell Investments Group, Ltd.

$1,301,997

0.53%

149,655

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	73,460	$639,102	49.1%	Defined
Russell Investments Capital, LLC	28,931	$251,699	19.3%	Defined
Russell Investments France SAS	18,373	$159,845	12.3%	Defined
Russell Investments Trust Company	28,891	$251,351	19.3%	Defined

Nuveen, LLC

$1,233,023

0.51%

141,727

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	38,199	$332,330	27.0%	Defined
TEACHERS ADVISORS, LLC joint	103,528	$900,693	73.0%	Defined

DIMENSIONAL FUND ADVISORS LP

$1,083,131

0.44%

124,498

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.	2,742	$23,855	2.2%	Defined
DFA Australia Ltd.	2,976	$25,891	2.4%	Defined
Dimensional Ireland Ltd	13,166	$114,544	10.6%	Defined
Held directly	105,614	$918,841	84.8%	Sole

Campbell & CO Investment Adviser LLC

$967,353

0.40%

111,190

Mitsubishi UFJ Asset Management Co., Ltd.

$961,845

0.39%

110,557

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

Manager	Shares	Value (USD)	% of position	Discretion
MITSUBISHI UFJ FINANCIAL GROUP INC	110,557	$961,845	100.0%	Defined

NANO CAP NEW MILLENNIUM GROWTH FUND L P

$935,250

0.38%

107,500

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	107,500	$935,250	100.0%	Sole

AQR CAPITAL MANAGEMENT LLC

$904,007

0.37%

103,909

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

Manager	Shares	Value (USD)	% of position	Discretion
Arax Advisory Partners	379	$3,297	0.4%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	1,384	$12,040	1.3%	Other
Stokes Family Office, LLC	176	$1,531	0.2%	Other
Held directly	101,970	$887,139	98.1%	Defined

IQ EQ FUND MANAGEMENT (IRELAND) Ltd

$858,594

0.35%

98,689

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$777,780

0.32%

89,400

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	89,400	$777,780	100.0%	Other

BANK OF MONTREAL /CAN/

$759,909

0.31%

87,346

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

Manager	Shares	Value (USD)	% of position	Discretion
BMO Family Office, LLC	87,341	$759,866	100.0%	Defined
BMO NESBITT BURNS INC.	5	$43	0.0%	Defined

SEI INVESTMENTS CO

$676,155

0.28%

77,719

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

Manager	Shares	Value (USD)	% of position	Discretion
SEI TRUST CO	77,719	$676,155	100.0%	Sole

UBS Group AG

$673,519

0.28%

77,416

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	5,000	$43,500	6.5%	Defined
UBS AG	72,416	$630,019	93.5%	Defined

GOLDMAN SACHS GROUP INC

$663,200

0.27%

76,230

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	25,848	$224,877	33.9%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	50,382	$438,323	66.1%	Defined

D. E. Shaw & Co., Inc.

$656,380

0.27%

75,446

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

Manager	Shares	Value (USD)	% of position	Discretion
D. E. SHAW & CO, L.P.	75,446	$656,380	100.0%	Defined

Bank of New York Mellon Corp

$632,993

0.26%

72,758

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

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	25,296	$220,075	34.8%	Defined
The Bank of New York Mellon	47,066	$409,474	64.7%	Defined
BNY Mellon, NA joint	395	$3,436	0.5%	Defined
Held directly	1	$8	0.0%	Defined

ACADIAN ASSET MANAGEMENT LLC

$612,253

0.25%

70,374

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

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	70,374	$612,253	100.0%	Defined

Bruce & Co., Inc.

$594,088

0.24%

68,286

CITADEL ADVISORS LLC

$545,898

0.22%

62,747

LPL Financial LLC

$482,423

0.20%

55,451

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$439,350

0.18%

50,500

GSA CAPITAL PARTNERS LLP

$427,692

0.18%

49,160

ALLIANCEBERNSTEIN L.P.

$344,085

0.14%

39,550

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

Manager	Shares	Value (USD)	% of position	Discretion
Equitable Holdings, Inc.	39,550	$344,085	100.0%	Defined

Old Port Advisors

$336,072

0.14%

38,629

Squarepoint Ops LLC

$328,329

0.13%

37,739

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

Manager	Shares	Value (USD)	% of position	Discretion
Squarepoint Capital LLP	37,739	$328,329	100.0%	Defined

RHUMBLINE ADVISERS

$320,081

0.13%

36,791

Quantinno Capital Management LP

$270,839

0.11%

31,131

DEUTSCHE BANK AG\

$247,184

0.10%

28,412

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

Manager	Shares	Value (USD)	% of position	Discretion
DWS Investments UK Ltd	28,412	$247,184	100.0%	Defined

STATE OF WISCONSIN INVESTMENT BOARD

$236,379

0.10%

27,170

WELLS FARGO & COMPANY/MN

$212,035

0.09%

24,372

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

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	24,371	$212,027	100.0%	Defined
WELLS FARGO CLEARING SERVICES, LLC	1	$8	0.0%	Defined

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$203,353

0.08%

23,374

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

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	23,374	$203,353	100.0%	Other

Brevan Howard Capital Management LP

$180,020

0.07%

20,692

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

Manager	Shares	Value (USD)	% of position	Discretion
Brevan Howard US Investment Management, LP	20,692	$180,020	100.0%	Defined

PRICE T ROWE ASSOCIATES INC /MD/

$177,366

0.07%

20,387

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

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	20,387	$177,366	100.0%	Defined

FMR LLC

$168,770

0.07%

19,399

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	19,361	$168,440	99.8%	Defined
STRATEGIC ADVISERS LLC	38	$330	0.2%	Defined

MetLife Investment Management, LLC

$150,440

0.06%

17,292

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

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	17,292	$150,440	100.0%	Defined

Cresset Asset Management, LLC

$142,184

0.06%

16,343

Invesco Ltd.

$130,151

0.05%

14,960

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	4,172	$36,296	27.9%	Defined
Invesco Trust Co joint	10,788	$93,855	72.1%	Defined

Graham Capital Management, L.P.

$128,994

0.05%

14,827

PIER 88 INVESTMENT PARTNERS LLC

$123,540

0.05%

14,200

Magnetar Financial LLC

$120,189

0.05%

13,815

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

Manager	Shares	Value (USD)	% of position	Discretion
Magnetar Asset Management LLC	8,218	$71,496	59.5%	Sole
Held directly	5,597	$48,693	40.5%	Sole

CITIGROUP INC

$116,832

0.05%

13,429

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

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	13,429	$116,832	100.0%	Defined

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$116,588

0.05%

13,401

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

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	13,401	$116,588	100.0%	Defined

JPMORGAN CHASE & CO

$109,262

0.04%

12,559

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

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	12,065	$104,965	96.1%	Defined
J.P. Morgan Investment Management Inc.	494	$4,297	3.9%	Defined

GAINLINE FINANCIAL PARTNERS, LLC

$107,340

0.04%

12,338

Advyzon Investment Management, LLC

$107,340

0.04%

12,338

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

Manager	Shares	Value (USD)	% of position	Discretion
GAINLINE FINANCIAL PARTNERS, LLC	12,338	$107,340	100.0%	Other

OCCUDO QUANTITATIVE STRATEGIES LP

$106,627

0.04%

12,256

Concurrent Investment Advisors, LLC

$103,556

0.04%

11,903

PCM Encore, LLC

$102,921

0.04%

11,830

JANE STREET GROUP, LLC

$99,571

0.04%

11,445

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	9,376	$81,571	81.9%	Defined
Jane Street Global Trading, LLC	2,069	$18,000	18.1%	Defined

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$98,527

0.04%

11,325

Schonfeld Strategic Advisors LLC

$96,865

0.04%

11,134

AXQ CAPITAL, LP

$93,124

0.04%

10,704

Vanguard Global Advisers, LLC

$89,488

0.04%

10,286

Police & Firemen's Retirement System of New Jersey

$74,150

0.03%

8,523

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

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	8,523	$74,150	100.0%	Defined

NEW YORK STATE COMMON RETIREMENT FUND

$73,836

0.03%

8,487

OSAIC HOLDINGS, INC.

$48,937

0.02%

5,625

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

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	5,625	$48,937	100.0%	Defined

BARCLAYS PLC

$44,422

0.02%

5,106

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

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	3,816	$33,199	74.7%	Defined
BARCLAYS CAPITAL INC.	1,290	$11,223	25.3%	Defined

BNP PARIBAS ARBITRAGE, SA

$37,949

0.02%

4,362

Pinnacle Wealth Planning Services, Inc.

$36,366

0.01%

4,180

ROYAL BANK OF CANADA

$36,321

0.01%

4,175

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

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	868	$7,551	20.8%	Defined
RBC Capital Markets, LLC	3,306	$28,762	79.2%	Defined
Held directly	1	$8	0.0%	Sole

ANTIPODES PARTNERS Ltd

$34,747

0.01%

3,994

Allworth Financial LP

$29,345

0.01%

3,373

Legal & General Group Plc

$26,526

0.01%

3,049

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

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	3,049	$26,526	100.0%	Defined

Ameritas Investment Partners, Inc.

$24,316

0.01%

2,795

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

Manager	Shares	Value (USD)	% of position	Discretion
EATON VANCE MANAGEMENT	2,795	$24,316	100.0%	Other

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC

$13,363

0.01%

1,536

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

Manager	Shares	Value (USD)	% of position	Discretion
UBS Group AG	1,536	$13,363	100.0%	Defined

SIGNATUREFD, LLC

$12,588

0.01%

1,447

Tower Research Capital LLC (TRC)

$9,865

0.00%

1,134

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)	1,134	$9,865	100.0%	Defined

Versant Capital Management, Inc

$9,309

0.00%

1,070

NISA INVESTMENT ADVISORS, LLC

$5,950

0.00%

684

GAMMA Investing LLC

$5,811

0.00%

668

Parallel Advisors, LLC

$5,515

0.00%

634

Sterling Capital Management LLC

$5,106

0.00%

587

FEDERATED HERMES, INC.

$4,437

0.00%

510

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

Manager	Shares	Value (USD)	% of position	Discretion
FEDERATED MDTA LLC	510	$4,437	100.0%	Defined

Arax Advisory Partners

$3,523

0.00%

405

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

$3,384

0.00%

389

SUMMIT SECURITIES GROUP LLC

$1,992

0.00%

229

Key facts CIK 1555279 CUSIP 65443P102 13F (30d) 93 filings 91 filers Visit website Investor relations