Security key
65443P102
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 20,216,228
- Total 13F value
- $383,706,306
- Share change
- +1,197,605
- Put/Call ratio
- 0%
- SEC-reported price per share
- $19.01
- Number of holders
- 79
- Value change
- +$13,800,448
- Number of buys
- 44
- Number of sells
- 42
- Shares outstanding
- 38,121,579
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
Q1 2022
Institutions
79
Top holders
10
MASS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2022
Previous quarter: Q4 2021
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
BlackRock Finance, Inc.
Disclosed value leader
BlackRock Finance, Inc.
Comparable rows
15/15
Latest evidence
31 Dec 2021
13F
Lead comparable stake: 9.7%
Showing 1-6 of 15 holder rows.
Quick read
BlackRock Finance, Inc. leads the comparable SEC ownership view at 9.7%.
15 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 BlackRock Finance, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock Finance, Inc.
9.7%
ARK Investment Management LLC
7.9%
EVENTIDE ASSET MANAGEMENT, LLC
3.7%
VANGUARD GROUP INC
2.2%
Granahan Investment Management, LLC
2.1%
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 |
|---|---|---|---|---|---|
| BlackRock Finance, Inc. |
13F
Company
|
9.7%
|
$95,954,000
3,709,061 shares
|
— | 31 Dec 2021 |
| ARK Investment Management LLC |
13F
Company
|
7.9%
|
$77,517,000
2,996,393 shares
|
— | 31 Dec 2021 |
| EVENTIDE ASSET MANAGEMENT, LLC |
13F
Company
|
3.7%
|
$36,477,000
1,410,000 shares
|
— | 31 Dec 2021 |
| VANGUARD GROUP INC |
13F
Company
|
2.2%
|
$21,684,000
838,185 shares
|
— | 31 Dec 2021 |
| Granahan Investment Management, LLC |
13F
Company
|
2.1%
|
$20,579,000
795,483 shares
|
— | 31 Dec 2021 |
| FRED ALGER MANAGEMENT, LLC |
13F
Company
|
1.6%
|
$15,547,000
600,967 shares
|
— | 31 Dec 2021 |
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 Q1 2022
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
79
Shares
20,216,228
Rows available
79
| 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 Q1 2022 vs Q4 2021 Across Filers
Q4 2021 holders
85
Q1 2022 holders
79
Holder diff
-6
| Investor | Q4 2021 Shares | Q1 2022 Shares | Share Diff | Share Chg % | Q4 2021 value | Q1 2022 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend