908 Devices Inc. (MASS)
Nasdaq: MASS · Measuring & Controlling Devices, NEC · Burlington, MA · filing with the SEC since 2012
Who owns 908 Devices Inc.
As filed with the SECHolders of 5% or more
4
Mathew P. Arens holds 17.1% of Common Stock, $0.001 par value, as its SCHEDULE 13G/A filed Feb 17, 2026 says.
Directors and officers
14
report now, of 23 people on the record since 2020. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 4 named at left.
Holders of 5% or moreshare of the class, as filed
Mathew P. Arens
SCHEDULE 13G/A · filed Feb 17, 2026 · Common Stock, $0.001 par value · 12.9% in Dec 5, 2025
Keith Crandell
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock par value $0.001 per share · 15.3% in May 15, 2026
AWM Investment Company, Inc.
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, Par Value $0.001 · 14.7% in Apr 7, 2025
ARK Investment Management LLC
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock · 4.94% in Jun 5, 2026
Blackrock, Inc.
SCHEDULE 13G/A · filed Oct 27, 2026 · Common Stock · reported falling below 5%, from 5.1% in Jul 27, 2026
The Vanguard Group
SCHEDULE 13G/A · filed Jan 30, 2025 · Common Stock · reported falling below 5%
State Street Corporation
SCHEDULE 13G · filed Feb 9, 2026 · COMMON STOCK · reported falling below 5%, from 6.4% in Aug 11, 2025
Ameriprise Financial, Inc.
SCHEDULE 13G/A · filed May 15, 2025 · Common Stock · reported falling below 5%
What MASS reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Red Wave Technology
A company bought · acquisition · owns, named in the 10-K filed Mar 9, 2026
2 subsidiaries in 1 country, from the list filed with the 10-K filed Mar 9, 2026.
Insider tradesForm 4
42sales
0purchases
38sales on a scheduled plan
5people selling
$6.1Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 6, 2025 to Nov 6, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 6, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window6 of 29 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Awm Investment Company, Inc. | 10% owner | 18 | $4.2M | 0 | 0 | $0 |
| Knopp Kevin J. | President and CEO | 12 | $2.6M | 11 | 0 | $0 |
| Brown Christopher D. | Chief Product Officer | 16 | $2.5M | 16 | 0 | $0 |
| Kenneweg John | SVP, Sales & Product Marketing | 5 | $500,000 | 3 | 0 | $0 |
| Griffith Joseph H. IV | Chief Financial Officer | 4 | $400,000 | 3 | 0 | $0 |
| Mccallion Kevin J. | SVP, Products and Production | 5 | $200,000 | 5 | 0 | $0 |