Security key
65443P102
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 8,547,858
- Total 13F value
- $413,830,255
- Share change
- +492,974
- SEC-reported price per share
- $48.50
- Number of holders
- 71
- Value change
- +$12,162,543
- Number of buys
- 51
- Number of sells
- 43
- Shares outstanding
- 38,121,579
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2021
Institutions
71
Top holders
10
MASS full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2021
Previous quarter: Q4 2020
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
FMR LLC
Disclosed value leader
FMR LLC
Comparable rows
15/15
Latest evidence
31 Dec 2020
13F
Lead comparable stake: 2%
Showing 1-6 of 15 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 2%.
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 FMR LLC's linked filing trail.
Comparable ownership
Top 5
FMR LLC
2%
Tao Capital Management LP
1.9%
PRICE T ROWE ASSOCIATES INC /MD/
1.5%
Cormorant Asset Management, LP
1.4%
ARK Investment Management LLC
1.1%
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 |
|---|---|---|---|---|---|
| FMR LLC |
13F
Company
|
2%
|
$42,632,000
748,566 shares
|
— | 31 Dec 2020 |
| Tao Capital Management LP |
13F
Company
|
1.9%
|
$40,749,000
715,519 shares
|
— | 31 Dec 2020 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
Company
|
1.5%
|
$32,632,000
573,000 shares
|
— | 31 Dec 2020 |
| Cormorant Asset Management, LP |
13F
Company
|
1.4%
|
$29,503,000
545,322 shares
|
— | 31 Dec 2020 |
| ARK Investment Management LLC |
13F
Company
|
1.1%
|
$24,901,000
437,248 shares
|
— | 31 Dec 2020 |
| Capital World Investors |
13F
Company
|
1.1%
|
$24,204,000
425,000 shares
|
— | 31 Dec 2020 |
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 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
71
Shares
8,547,858
Rows available
71
| 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 2021 vs Q4 2020 Across Filers
Q4 2020 holders
70
Q1 2021 holders
71
Holder diff
1
| Investor | Q4 2020 Shares | Q1 2021 Shares | Share Diff | Share Chg % | Q4 2020 value | Q1 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend