MASS · NASDAQ · Medical - Specialties

908 Devices (MASS)

Builds handheld instruments that identify hazardous chemicals at the point of need.

$10.39
Pre-market+0.05 (+0.48%)
At close$10.34(−2.91%)

Breakdown13F · 13D/G · Form 4

Institutions114 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail≈ 68.48%28.31M shares
Insiders14 holders · as of Aug 27, 20266.18%2.56M shares
Strategic holders2 holders · as of May 15, 202622.22%9.18M shares
Otherremainder≈ 3.12%1.29M shares

41.33M company shares as of Sep 3, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing

This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.

Top shareholders13F · 13D/G · Form 4

HolderStakeSharesEvidence
First Light Asset Management, LLCInstitution
15.20%6.28M13Fas of Jun 30, 2026
ARCH Venture Fund VII, L.P.Strategic10 percent owner
13.85%5.73M13Gfiled May 15, 2026
AWM Investment Company, Inc.Institution
11.81%4.88M13Fas of Jun 30, 2026
Alger Associates, Inc.Strategic
8.37%3.46M13Gfiled Oct 11, 2022
Ark Investment Management LLCInstitution
4.91%2.03M13Fas of Jun 30, 2026
BlackRock, Inc.Institution
4.70%1.94M13Fas of Jun 30, 2026
Needham Investment Management LLCInstitution
4.40%1.82M13Fas of Jun 30, 2026
Vanguard Capital Management LLCInstitution
3.12%1.29M13Fas of Jun 30, 2026
Kevin J. KnoppInsiderdirector, officer: President and CEO
2.57%1.06MForm 4filed Aug 17, 2026
First Eagle Investment Management, LLCInstitution
2.25%929,98513Fas of Jun 30, 2026
Christopher D. BrownInsiderdirector
1.95%805,559Form 4filed Aug 12, 2026
Geode Capital Management, LLCInstitution
1.84%761,79713Fas of Jun 30, 2026
Granahan Investment Management, LLCInstitution
1.67%692,09213Fas of Jun 30, 2026
State Street CorpInstitution
1.47%606,56013Fas of Jun 30, 2026
Essex Investment Management Co LLCInstitution
1.14%470,24413Fas of Jun 30, 2026
Morgan StanleyInstitution
0.98%404,07813Fas of Jun 30, 2026
Prescott Group Capital Management, L.L.C.Institution
0.87%361,59513Fas of Jun 30, 2026
Meros Investment Management, LPInstitution
0.87%361,36813Fas of Jun 30, 2026
American Century Companies IncInstitution
0.87%359,84813Fas of Jun 30, 2026
Highmark Wealth Management LLCInstitution
0.82%339,78313Fas of Jun 30, 2026
Northern Trust CorpInstitution
0.64%266,41713Fas of Jun 30, 2026
Bank of America Corp /DE/Institution
0.61%251,02713Fas of Jun 30, 2026
Charles Schwab Investment Management IncInstitution
0.57%233,89213Fas of Jun 30, 2026
Sixth Street Partners Management Company, L.P.Institution
0.57%233,89213Fas of Jun 30, 2026
Nikko Asset Management Americas, Inc.Institution
0.55%228,68113Fas of Jun 30, 2026

13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more · Form 4 — an insider's transaction report

Institutions13F, as of Jun 30, 2026

114 holders · 28.31M shares · 17 new positions · 62 increased · 33 reduced · 15 closed

HolderShares% outstandingChg q/qFiled
First Light Asset Management, LLC6.28M15.20%+210.2KAug 14, 2026
Awm Investment Company, Inc.4.88M11.81%−320.2KAug 14, 2026
Ark Investment Management LLC2.03M4.91%+81.2KAug 14, 2026
BlackRock, Inc.1.94M4.70%+176.9KAug 7, 2026
Needham Investment Management LLC1.82M4.40%+580.6KAug 14, 2026
Vanguard Capital Management LLC1.29M3.12%+172.3KAug 13, 2026
First Eagle Investment Management, LLC930.0K2.25%+126.4KAug 24, 2026
Geode Capital Management, LLC761.8K1.84%+66.3KAug 12, 2026

Ownership statements13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
First Light Asset Management, LLC16.48%5.96M13GFeb 17, 2026
ARCH Venture Fund VII, L.P.15.10%5.73M13GMay 15, 2026
AWM Investment Company, Inc.14.70%5.20M13GApr 7, 2025
BlackRock, Inc.5.10%1.94M13GJul 27, 2026

Insider tradesForm 4

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Aug 25, 2026
Joseph H. IV Griffithofficer: Chief Financial Officer
Sale11,459$10.95121,497
Aug 21, 2026
AWM Investment Company, Inc.10 percent owner
Sale41,578$10.614,779,773
Aug 20, 2026
AWM Investment Company, Inc.10 percent owner
Sale8,422$10.524,821,351
Aug 17, 2026
Kevin J. Knoppdirector, officer: President and CEO
Sale20,000$10.35555,968
Aug 13, 2026
Kevin J. Knoppdirector, officer: President and CEO
Sale7,622$10.06575,968
Aug 12, 2026
Kevin J. Knoppdirector, officer: President and CEO
Sale2,747$10.07583,590
Aug 11, 2026
Kevin J. Knoppdirector, officer: President and CEO
Sale · 2 lots145,918$9.90586,337
Aug 10, 2026
Kevin J. Knoppdirector, officer: President and CEO
Sale348$9.06732,255
Aug 11, 2026
Christopher D. Browndirector
Sale8,358$9.23805,559
Aug 10, 2026
Christopher D. Browndirector
Sale9,442$9.03813,917

CongressHouse and Senate disclosures

Not reported.