908 Devices Inc. (MASS) — Institutional Holders, Q2 2026
112 institutional investment managers reported a MASS position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $244.1M. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
MASS in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- NEEDHAM INVESTMENT MANAGEMENTAdded · +580,620 sh+$5.1M
- AMERICAN CENTURY COMPANIESAdded · +303,954 sh+$2.6M
- BANK OF AMERICAAdded · +225,949 sh+$2.0M
- First Light Asset ManagementAdded · +210,241 sh+$1.8M
- BlackRockAdded · +176,920 sh+$1.5M
Biggest sellers
- Tao Capital ManagementSold out · -568,981 sh-$5.0M
- AWM Investment CompanyTrimmed · -320,151 sh-$2.8M
- GSA CAPITAL PARTNERS LLPTrimmed · -201,868 sh-$1.8M
- Squarepoint OpsTrimmed · -175,454 sh-$1.5M
- MILLENNIUM MANAGEMENTSold out · -142,422 sh-$1.2M
MASS 13F holders ranked 1–100 of 112
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | First Light Asset Management#1 · 6,282,804 sh | 6,282,804 | $54.7M | 3.32% | +3.5% |
| 2 | AWM Investment Company#2 · 4,879,773 sh | 4,879,773 | $42.5M | 3.68% | -6.2% |
| 3 | ARK Investment Management#3 · 2,027,920 sh | 2,027,920 | $17.6M | 0.11% | +4.2% |
| 4 | BlackRock#4 · 1,944,236 sh | 1,944,236 | $16.9M | <0.01% | +10.0% |
| 5 | NEEDHAM INVESTMENT MANAGEMENT#5 · 1,820,620 sh | 1,820,620 | $15.8M | 0.48% | +46.8% |
| 6 | VANGUARD CAPITAL MANAGEMENT#6 · 1,291,570 sh | 1,291,570 | $11.2M | <0.01% | +15.4% |
| 7 | First Eagle Investment Management#7 · 929,985 sh | 929,985 | $8.1M | 0.01% | +15.7% |
| 8 | GEODE CAPITAL MANAGEMENT#8 · 761,797 sh | 761,797 | $6.6M | <0.01% | +9.5% |
| 9 | Granahan Investment Management#9 · 692,092 sh | 692,092 | $6.0M | 0.21% | -0.4% |
| 10 | STATE STREET#10 · 606,560 sh | 606,560 | $5.3M | <0.01% | -3.1% |
| 11 | ESSEX INVESTMENT MANAGEMENT#11 · 470,244 sh | 470,244 | $4.1M | — | -4.3% |
| 12 | MORGAN STANLEY#12 · 404,078 sh | 404,078 | $3.5M | <0.01% | +8.3% |
| 13 | PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C.#13 · 361,595 sh | 361,595 | $3.1M | 0.27% | 0.0% |
| 14 | Meros Investment Management#14 · 361,368 sh | 361,368 | $3.1M | 1.00% | -0.1% |
| 15 | AMERICAN CENTURY COMPANIES#15 · 359,848 sh | 359,848 | $3.1M | <0.01% | +543.8% |
| 16 | HighMark Wealth Management#16 · 339,783 sh | 339,783 | $3.0M | 0.99% | +6.4% |
| 17 | NORTHERN#17 · 266,417 sh | 266,417 | $2.3M | <0.01% | +10.4% |
| 18 | BANK OF AMERICA#18 · 251,027 sh | 251,027 | $2.2M | <0.01% | +901.0% |
| 19 | CHARLES SCHWAB INVESTMENT MANAGEMENT#19 · 233,892 sh | 233,892 | $2.0M | <0.01% | +1.9% |
| 20 | Sumitomo Mitsui#20 · 228,681 sh | 228,681 | $2.0M | <0.01% | -15.3% |
| 21 | Nikko Asset Management Americas#21 · 228,681 sh | 228,681 | $2.0M | 0.03% | -15.3% |
| 22 | VANGUARD PORTFOLIO MANAGEMENT#22 · 194,858 sh | 194,858 | $1.7M | <0.01% | +19.0% |
| 23 | RENAISSANCE TECHNOLOGIES#23 · 191,900 sh | 191,900 | $1.7M | <0.01% | -16.6% |
| 24 | VANGUARD FIDUCIARY#24 · 186,056 sh | 186,056 | $1.6M | <0.01% | +3.2% |
| 25 | RAYMOND JAMES FINANCIAL#25 · 167,348 sh | 167,348 | $1.5M | <0.01% | -5.2% |
| 26 | Legato Capital Management#26 · 158,119 sh | 158,119 | $1.4M | 0.11% | +3.0% |
| 27 | Russell Investments Group, Ltd.#27 · 149,655 sh | 149,655 | $1.3M | <0.01% | +3.0% |
| 28 | Nuveen#28 · 141,727 sh | 141,727 | $1.2M | <0.01% | +40.2% |
| 29 | DIMENSIONAL FUND ADVISORS#29 · 124,498 sh | 124,498 | $1.1M | <0.01% | +4.8% |
| 30 | Campbell & Investment Adviser#30 · 111,190 sh | 111,190 | $967.4K | 0.05% | +274.9% |
| 31 | Mitsubishi UFJ Asset Management , Ltd.#31 · 110,557 sh | 110,557 | $961.8K | <0.01% | -16.5% |
| 32 | NANO CAP NEW MILLENNIUM GROWTH FUND L P#32 · 107,500 sh | 107,500 | $935.3K | 0.72% | -10.4% |
| 33 | AQR CAPITAL MANAGEMENT#33 · 103,909 sh | 103,909 | $904.0K | <0.01% | -0.5% |
| 34 | IQ EQ FUND MANAGEMENT (IRELAND) Ltd#34 · 98,689 sh | 98,689 | $858.6K | 0.05% | +9.9% |
| 35 | BANK OF MONTREAL#35 · 87,346 sh | 87,346 | $759.9K | <0.01% | 0.0% |
| 36 | SEI INVESTMENTS#36 · 77,719 sh | 77,719 | $676.2K | <0.01% | -52.9% |
| 37 | UBS Group AG#37 · 77,416 sh | 77,416 | $673.5K | <0.01% | -17.2% |
| 38 | GOLDMAN SACHS GROUP#38 · 76,230 sh | 76,230 | $663.2K | <0.01% | -31.5% |
| 39 | D. E. Shaw#39 · 75,446 sh | 75,446 | $656.4K | <0.01% | New |
| 40 | Bank of New York Mellon#40 · 72,758 sh | 72,758 | $633.0K | <0.01% | +23.2% |
| 41 | ACADIAN ASSET MANAGEMENT#41 · 70,374 sh | 70,374 | $609.0K | <0.01% | New |
| 42 | Bruce#42 · 68,286 sh | 68,286 | $594.1K | 0.16% | 0.0% |
| 43 | CITADEL ADVISORS#43 · 62,747 sh | 62,747 | $545.9K | <0.01% | -56.6% |
| 44 | LPL Financial#44 · 55,451 sh | 55,451 | $482.4K | <0.01% | -18.2% |
| 45 | BRIDGEWAY CAPITAL MANAGEMENT#45 · 50,500 sh | 50,500 | $439.4K | <0.01% | 0.0% |
| 46 | GSA CAPITAL PARTNERS LLP#46 · 49,160 sh | 49,160 | $428.0K | 0.03% | -80.4% |
| 47 | Old Port Advisors#47 · 38,629 sh | 38,629 | $336.1K | — | 0.0% |
| 48 | Squarepoint Ops#48 · 37,739 sh | 37,739 | $328.3K | <0.01% | -82.3% |
| 49 | RHUMBLINE ADVISERS#49 · 36,791 sh | 36,791 | $320.1K | <0.01% | +6.5% |
| 50 | Quantinno Capital Management#50 · 31,131 sh | 31,131 | $270.8K | <0.01% | +31.2% |
| 51 | DEUTSCHE BANK AG\#51 · 28,412 sh | 28,412 | $247.2K | <0.01% | +54.2% |
| 52 | ALLIANCEBERNSTEIN L.P.#52 · 39,550 sh | 39,550 | $242.0K | <0.01% | +19.3% |
| 53 | STATE OF WISCONSIN INVESTMENT BOARD#53 · 27,170 sh | 27,170 | $236.4K | <0.01% | +3.7% |
| 54 | WELLS FARGO & COMPANY#54 · 24,372 sh | 24,372 | $212.0K | 0.00% | +132.6% |
| 55 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#55 · 23,374 sh | 23,374 | $203.4K | 0.00% | -30.9% |
| 56 | Brevan Howard Capital Management#56 · 20,692 sh | 20,692 | $180.0K | <0.01% | New |
| 57 | PRICE T ROWE ASSOCIATES#57 · 20,387 sh | 20,387 | $178.0K | 0.00% | +5.2% |
| 58 | FMR#58 · 19,399 sh | 19,399 | $168.8K | 0.00% | +84.0% |
| 59 | MetLife Investment Management#59 · 17,292 sh | 17,292 | $150.4K | <0.01% | +1.6% |
| 60 | Cresset Asset Management#60 · 16,343 sh | 16,343 | $142.2K | <0.01% | 0.0% |
| 61 | Invesco Ltd.#61 · 14,960 sh | 14,960 | $130.2K | 0.00% | +5.9% |
| 62 | Graham Capital Management, L.P.#62 · 14,827 sh | 14,827 | $129.0K | <0.01% | +11.9% |
| 63 | PIER 88 INVESTMENT PARTNERS#63 · 14,200 sh | 14,200 | $123.5K | 0.03% | New |
| 64 | Magnetar Financial#64 · 13,815 sh | 13,815 | $120.2K | <0.01% | New |
| 65 | CITIGROUP#65 · 13,429 sh | 13,429 | $116.8K | 0.00% | +839.7% |
| 66 | MIRAE ASSET GLOBAL ETFS Ltd.#66 · 13,401 sh | 13,401 | $116.6K | <0.01% | +2.9% |
| 67 | JPMORGAN CHASE#67 · 12,559 sh | 12,559 | $110.6K | 0.00% | +11.1% |
| 68 | Advyzon Investment Management#68 · 12,338 sh | 12,338 | $107.3K | <0.01% | New |
| 69 | GAINLINE FINANCIAL PARTNERS#69 · 12,338 sh | 12,338 | $107.3K | — | — |
| 70 | OCCUDO QUANTITATIVE STRATEGIES#70 · 12,256 sh | 12,256 | $106.6K | <0.01% | New |
| 71 | Concurrent Investment Advisors#71 · 11,903 sh | 11,903 | $103.6K | — | 0.0% |
| 72 | PCM Encore#72 · 11,830 sh | 11,830 | $102.9K | 0.02% | 0.0% |
| 73 | JANE STREET GROUP#73 · 11,445 sh | 11,445 | $99.6K | 0.00% | -20.0% |
| 74 | Schonfeld Strategic Advisors#74 · 11,134 sh | 11,134 | $96.9K | <0.01% | New |
| 75 | AXQ CAPITAL#75 · 10,704 sh | 10,704 | $93.1K | 0.01% | New |
| 76 | WEALTH ENHANCEMENT ADVISORY SERVICES#76 · 11,325 sh | 11,325 | $91.7K | — | New |
| 77 | Vanguard Global Advisers#77 · 10,286 sh | 10,286 | $89.5K | 0.00% | 0.0% |
| 78 | Police & Firemen's Retirement System of New Jersey#78 · 8,523 sh | 8,523 | $74.2K | <0.01% | 0.0% |
| 79 | NEW YORK STATE COMMON RETIREMENT FUND#79 · 8,487 sh | 8,487 | $73.8K | <0.01% | 0.0% |
| 80 | OSAIC#80 · 5,625 sh | 5,625 | $48.9K | <0.01% | +10.3% |
| 81 | BARCLAYS PLC#81 · 5,106 sh | 5,106 | $44.4K | 0.00% | +2.6% |
| 82 | BNP PARIBAS FINANCIAL MARKETS#82 · 4,362 sh | 4,362 | $37.9K | 0.00% | -26.6% |
| 83 | ROYAL BANK OF CANADA#83 · 4,175 sh | 4,175 | $37.0K | 0.00% | +898.8% |
| 84 | Pinnacle Wealth Planning Services#84 · 4,180 sh | 4,180 | $36.4K | <0.01% | 0.0% |
| 85 | ANTIPODES PARTNERS Ltd#85 · 3,994 sh | 3,994 | $34.7K | <0.01% | -9.3% |
| 86 | Allworth Financial#86 · 3,373 sh | 3,373 | $29.3K | <0.01% | -36.9% |
| 87 | Legal & General Group Plc#87 · 3,049 sh | 3,049 | $26.5K | 0.00% | +22.4% |
| 88 | Ameritas Investment Partners#88 · 2,795 sh | 2,795 | $24.3K | <0.01% | 0.0% |
| 89 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#89 · 1,536 sh | 1,536 | $13.4K | 0.00% | 0.0% |
| 90 | SIGNATUREFD#90 · 1,447 sh | 1,447 | $12.6K | — | -26.4% |
| 91 | Tower Research Capital (TRC)#91 · 1,134 sh | 1,134 | $9.9K | <0.01% | -72.6% |
| 92 | Versant Capital Management#92 · 1,070 sh | 1,070 | $9.3K | — | 0.0% |
| 93 | NISA INVESTMENT ADVISORS#93 · 684 sh | 684 | $6.0K | — | 0.0% |
| 94 | GAMMA Investing#94 · 668 sh | 668 | $5.8K | — | +10.2% |
| 95 | Parallel Advisors#95 · 634 sh | 634 | $5.5K | <0.01% | -67.3% |
| 96 | Sterling Capital Management#96 · 587 sh | 587 | $5.1K | — | +68.7% |
| 97 | FEDERATED HERMES#97 · 510 sh | 510 | $4.4K | 0.00% | +41.7% |
| 98 | SRS Capital Advisors#98 · 405 sh | 405 | $3.5K | 0.00% | New |
| 99 | SUMMIT SECURITIES GROUP#99 · 229 sh | 229 | $2.0K | <0.01% | New |
| 100 | Integrated Wealth Concepts#100 · 226 sh | 226 | $2.0K | 0.00% | New |
Funds that sold out of MASS in Q2 2026 (11)
Held MASS at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| Tao Capital Management568,981 sh | 568,981 | $3.5M |
| MILLENNIUM MANAGEMENT142,422 sh | 142,422 | $871.6K |
| Trexquant Investment73,194 sh | 73,194 | $447.9K |
| Cassaday & Wealth Management71,629 sh | 71,629 | $438.4K |
| TWO SIGMA INVESTMENTS44,127 sh | 44,127 | $270.1K |
| XTX Topco Ltd41,365 sh | 41,365 | $253.2K |
| 49 WEALTH MANAGEMENT17,101 sh | 17,101 | $104.7K |
| Dynamic Technology Lab Private Ltd13,898 sh | 13,898 | $85.1K |
| Intelligence Driven Advisers10,000 sh | 10,000 | $61.2K |
| GROUP ONE TRADING, L.P.202 sh | 202 | $1.2K |
| JONES FINANCIAL COMPANIES LLLP100 sh | 100 | $578.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.