Security key
65443P102
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 24,510,470
- Total 13F value
- $214,708,958
- Share change
- +182,298
- Put/Call ratio
- 34%
- SEC-reported price per share
- $8.76
- Number of holders
- 105
- Value change
- +$1,943,620
- Number of buys
- 46
- Number of sells
- 49
- Shares outstanding
- 41,621,204
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
105
Top holders
10
MASS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2026
908 Devices Inc. SEC filings
908 Devices Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 65443P102
Recent filing periods:
Ownership snapshot
Top reported holders of MASS - 908 Devices Inc. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD GROUP INC
Disclosed value leader
AWM Investment Company, Inc.
Comparable rows
1/15
Latest evidence
30 Jun 2025
13F
13D/G
Lead comparable stake: 3.8%
14 rows are not safely comparable across share classes.
13D/G row: VANGUARD GROUP INC
Showing 1-6 of 15 holder rows.
Quick read
VANGUARD GROUP INC leads the comparable SEC ownership view at 3.8%.
1 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD GROUP INC's linked filing trail.
Comparable ownership
Top 1
VANGUARD GROUP INC
3.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13F
13D/G
Company · The Vanguard Group
|
3.8%
Reported 13D/G
· 31 Dec 2024
|
$10,203,850
1,431,115 shares
|
— | 30 Jun 2025 |
| AWM Investment Company, Inc. |
13F
Company
|
—
denominator unverified
|
$37,075,458
5,199,924 shares
|
— | 30 Jun 2025 |
| ARK Investment Management LLC |
13F
Company
|
—
denominator unverified
|
$18,882,224
2,648,278 shares
|
— | 30 Jun 2025 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$16,307,273
2,287,135 shares
|
— | 30 Jun 2025 |
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$12,768,726
1,790,845 shares
|
— | 30 Jun 2025 |
| GM Advisory Group, LLC |
13F
Company
|
—
denominator unverified
|
$8,308,525
1,165,291 shares
|
— | 30 Jun 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
105
Shares
24,510,470
Rows available
105
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
99
Q3 2025 holders
105
Holder diff
6
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend