MASS
908 Devices Inc.Company with tickers: MASS
CIK
1555279
CUSIP
65443P102
Shares Outstanding
37,813,621
Website
https://www.908devices.com
Investor Relations
https://ir.908devices.com/overview/default.aspx
13F Activity (30d)
11 filings
7 filers
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.
Holders: 1
Total Value: $15,837,762
Total Shares: 1,883,206
Institutional Ownership Trend
24 quarters
Quarterly Activity
vs Mar 31, 2026
New
0
Increased
0
Decreased
1
Sold Out
111
Unchanged
0
Holder count:
-111
Institutional value:
-92.3%
Shares held:
-94.4%
Top Buyers
vs Mar 31, 2026No qualifying movers this quarter.
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Large ARK Investment Management LLC | −63,479 | 1,883,206 |
Top New Positions
vs Mar 31, 2026No new positions this quarter.
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mid First Light Asset Management, LLC | 6,072,563 | $37,164,085 | |
| — Keith Crandell | 5,809,216 | $35,552,401 | |
| Small AWM Investment Company, Inc. | 5,199,924 | $31,823,534 | |
| Mega BlackRock, Inc. | 1,767,316 | $10,815,971 | |
| Mid NEEDHAM INVESTMENT MANAGEMENT LLC | 1,240,000 | $7,588,800 |
| Holder | Value (USD) | % of 13F | Shares | Type | Discretion | Filed | Open | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Large ARK Investment Management LLC | $15,837,762 | 100.00% | 1,883,206 | Shares | Sole | 2026-06-05 | ||||
| No holders match your search. | ||||||||||