Security key
65443P102
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 21,933,767
- Total 13F value
- $187,987,526
- Share change
- +224,901
- Put/Call ratio
- 134%
- SEC-reported price per share
- $8.60
- Number of holders
- 81
- Value change
- +$2,625,118
- Number of buys
- 42
- Number of sells
- 43
- 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 2023
Institutions
81
Top holders
10
MASS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2023
Previous quarter: Q4 2022
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
ARK Investment Management...
Disclosed value leader
ARK Investment Management...
Comparable rows
15/15
Latest evidence
31 Dec 2022
13F
Lead comparable stake: 9.7%
Showing 1-6 of 15 holder rows.
Quick read
ARK Investment Management LLC 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 ARK Investment Management LLC's linked filing trail.
Comparable ownership
Top 5
ARK Investment Management LLC
9.7%
FRED ALGER MANAGEMENT, LLC
7.4%
EVENTIDE ASSET MANAGEMENT, LLC
5.9%
BlackRock Finance, Inc.
4.6%
VANGUARD GROUP INC
3.9%
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 |
|---|---|---|---|---|---|
| ARK Investment Management LLC |
13F
Company
|
9.7%
|
$28,113,800
3,689,475 shares
|
— | 31 Dec 2022 |
| FRED ALGER MANAGEMENT, LLC |
13F
Company
|
7.4%
|
$21,373,437
2,804,913 shares
|
— | 31 Dec 2022 |
| EVENTIDE ASSET MANAGEMENT, LLC |
13F
Company
|
5.9%
|
$16,997,667
2,230,665 shares
|
— | 31 Dec 2022 |
| BlackRock Finance, Inc. |
13F
Company
|
4.6%
|
$13,437,924
1,763,507 shares
|
— | 31 Dec 2022 |
| VANGUARD GROUP INC |
13F
Company
|
3.9%
|
$11,412,063
1,497,646 shares
|
— | 31 Dec 2022 |
| AMERIPRISE FINANCIAL INC |
13F
Company
|
3.3%
|
$9,515,000
1,248,716 shares
|
— | 31 Dec 2022 |
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 2023
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
81
Shares
21,933,767
Rows available
81
| 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 2023 vs Q4 2022 Across Filers
Q4 2022 holders
87
Q1 2023 holders
81
Holder diff
-6
| Investor | Q4 2022 Shares | Q1 2023 Shares | Share Diff | Share Chg % | Q4 2022 value | Q1 2023 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend