MASS Institutional Ownership & Shareholders
908 DEVICES INC (MASS) is currently held by 116 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $255.19M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
First Light Asset Management, Llc is currently the largest disclosed institutional shareholder of MASS tracked by InsiderSet, reporting ownership valued at approximately $54.66M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $70.68M, representing an estimated gain of +29.31% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 73% of the total disclosed MASS value among the investors covered in this analysis. Major shareholders include First Light Asset Management, Llc, Awm Investment Company, Inc., ARK Invest, and several other long-term asset managers with concentrated positions in 908 DEVICES INC (MASS).
This page ranks the largest institutional MASS shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
116
Total Reported Value
$255.19M
Largest Holder
First Light Asset Management, Llc
Largest Position
$54.66M
Insider Transactions (90d)
17
Latest Filing Quarter
Q2 2026
New Institutional Positions
131
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| First Light Asset Management, Llc | 3.32% | 6,282,804 | $54,660,395 | $70,681,545 | +$16,021,150 | +29.31% | |
| Awm Investment Company, Inc. | 3.68% | 4,879,773 | $42,454,025 | $54,897,446 | +$12,443,421 | +29.31% | |
| ARK Invest | Cathie Wood | 0.11% | 2,027,920 | $17,642,905 | $22,814,100 | +$5,171,195 | +29.31% |
| Blackrock, Inc. | 0.00% | 1,944,236 | $16,914,853 | $21,872,655 | +$4,957,802 | +29.31% | |
| Needham Investment Management Llc | 0.48% | 1,820,620 | $15,839,394 | $20,481,975 | +$4,642,581 | +29.31% | |
| Vanguard Capital Management Llc | 0.00% | 1,291,570 | $11,236,659 | $14,530,163 | +$3,293,504 | +29.31% | |
| First Eagle U.S. Value | Jean-Marie Eveillard | 0.01% | 929,985 | $8,090,870 | $10,462,331 | +$2,371,461 | +29.31% |
| Geode Capital Management, Llc | 0.00% | 761,797 | $6,629,605 | $8,570,216 | +$1,940,611 | +29.27% | |
| Granahan Investment Management, Llc | 0.21% | 692,092 | $6,021,200 | $7,786,035 | +$1,764,835 | +29.31% | |
| Essex Investment Management Co Llc | 0.83% | 455,706 | $5,623,412 | $5,126,693 | -$496,720 | -8.83% | |
| State Street Corp | 0.00% | 606,560 | $5,277,072 | $6,823,800 | +$1,546,728 | +29.31% | |
| Prescott Group Capital Management, L.L.C. | 0.40% | 361,595 | $4,462,082 | $4,067,944 | -$394,138 | -8.83% | |
| Morgan Stanley | 0.00% | 404,078 | $3,515,486 | $4,545,878 | +$1,030,392 | +29.31% | |
| Meros Investment Management, Lp | 1.00% | 361,368 | $3,143,902 | $4,065,390 | +$921,488 | +29.31% | |
| American Century Companies Inc | 0.00% | 359,848 | $3,130,678 | $4,048,290 | +$917,612 | +29.31% | |
| Highmark Wealth Management Llc | 0.99% | 339,783 | $2,956,112 | $3,822,559 | +$866,447 | +29.31% | |
| Old Port Advisors | 0.53% | 213,364 | $2,632,912 | $2,400,345 | -$232,567 | -8.83% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.00% | 208,108 | $2,568,053 | $2,341,215 | -$226,838 | -8.83% | |
| Northern Trust Corp | 0.00% | 266,417 | $2,317,828 | $2,997,191 | +$679,363 | +29.31% | |
| Bank Of America Corp | 0.00% | 251,027 | $2,183,935 | $2,824,054 | +$640,119 | +29.31% | |
| Charles Schwab Investment Management Inc | 0.00% | 233,892 | $2,034,860 | $2,631,285 | +$596,425 | +29.31% | |
| Amova Asset Management Americas, Inc. | 0.03% | 228,681 | $1,984,951 | $2,572,661 | +$587,710 | +29.61% | |
| Cassaday & Co Wealth Management Llc | 0.03% | 146,466 | $1,807,391 | $1,647,743 | -$159,649 | -8.83% | |
| Vanguard Portfolio Management Llc | 0.00% | 194,858 | $1,695,265 | $2,192,153 | +$496,888 | +29.31% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 191,900 | $1,669,530 | $2,158,875 | +$489,345 | +29.31% |
| Vanguard Fiduciary Trust Co | 0.00% | 186,056 | $1,618,687 | $2,093,130 | +$474,443 | +29.31% | |
| Gm Advisory Group, Llc | 0.06% | 238,218 | $1,457,894 | $2,679,953 | +$1,222,059 | +83.82% | |
| Raymond James Financial Inc | 0.00% | 167,348 | $1,455,928 | $1,882,665 | +$426,737 | +29.31% | |
| Legato Capital Management Llc | 0.11% | 158,119 | $1,375,635 | $1,778,839 | +$403,204 | +29.31% | |
| Russell Investments Group, Ltd. | 0.00% | 149,655 | $1,301,996 | $1,683,619 | +$381,623 | +29.31% | |
| Nuveen, Llc | 0.00% | 141,727 | $1,233,026 | $1,594,429 | +$361,403 | +29.31% | |
| Dimensional Fund Advisors Lp | 0.00% | 124,498 | $1,083,434 | $1,400,603 | +$317,169 | +29.27% | |
| Campbell & Co Investment Adviser Llc | 0.05% | 111,190 | $967,353 | $1,250,888 | +$283,535 | +29.31% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.00% | 110,557 | $961,846 | $1,243,766 | +$281,920 | +29.31% | |
| Nano Cap New Millennium Growth Fund L P | 0.72% | 107,500 | $935,250 | $1,209,375 | +$274,125 | +29.31% | |
| Aqr Capital Management Llc | 0.00% | 103,909 | $904,008 | $1,168,976 | +$264,968 | +29.31% | |
| Iq Eq Fund Management (Ireland) Ltd | 0.05% | 98,689 | $858,594 | $1,110,251 | +$251,657 | +29.31% | |
| Bank Of Montreal | 0.00% | 87,346 | $759,911 | $982,643 | +$222,732 | +29.31% | |
| Sei Investments Co | 0.00% | 77,719 | $676,155 | $874,339 | +$198,184 | +29.31% | |
| Ubs Group Ag | 0.00% | 77,416 | $673,519 | $870,930 | +$197,411 | +29.31% | |
| Goldman Sachs Group Inc | 0.00% | 76,230 | $663,201 | $857,588 | +$194,387 | +29.31% | |
| D. E. Shaw & Co., Inc. | 0.00% | 75,446 | $656,380 | $848,768 | +$192,388 | +29.31% | |
| Bank Of New York Mellon Corp | 0.00% | 72,758 | $632,992 | $818,528 | +$185,536 | +29.31% | |
| Acadian Asset Management Llc | 0.00% | 70,374 | $609,000 | $791,708 | +$182,708 | +30.00% | |
| Bruce & Co., Inc. | 0.16% | 68,286 | $594,088 | $768,218 | +$174,130 | +29.31% | |
| Citadel Advisors Llc | 0.00% | 62,747 | $545,899 | $705,904 | +$160,005 | +29.31% | |
| Lpl Financial Llc | 0.00% | 55,451 | $482,424 | $623,824 | +$141,400 | +29.31% | |
| Bridgeway Capital Management, Llc | 0.01% | 50,500 | $439,350 | $568,125 | +$128,775 | +29.31% | |
| Gsa Capital Partners Llp | 0.03% | 49,160 | $428,000 | $553,050 | +$125,050 | +29.22% | |
| Squarepoint Ops Llc | 0.00% | 37,739 | $328,329 | $424,564 | +$96,235 | +29.31% |
Frequently asked questions about MASS
Who are the largest institutional holders of MASS?
The largest institutional holders of MASS reported in the latest SEC Form 13F filings include First Light Asset Management, Llc, Awm Investment Company, Inc., ARK Invest, Blackrock, Inc., and Needham Investment Management Llc. InsiderSet ranks institutional holders by their latest reported MASS position.
What is MASS institutional ownership?
This page tracks MASS positions reported by institutional investment managers through SEC Form 13F. 908 DEVICES INC (MASS) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own MASS?
InsiderSet currently tracks 116 institutional managers reporting MASS holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of MASS shareholders.
How much MASS stock do institutions own?
Institutional investment managers disclosed approximately $255.19M in MASS holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was MASS institutional ownership last updated?
The latest MASS institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional MASS holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its MASS position after the reporting date.
Are institutions buying or selling MASS?
Institutional buying and selling can be analyzed by comparing MASS positions across consecutive 13F reporting periods. InsiderSet's MASS Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View MASS ownership changes.
How has MASS institutional ownership changed over time?
InsiderSet tracks MASS institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.