Security key
869367102
Sutro Biopharma, Inc. - Common Stock, $0.001 par value per share (STRO)
CUSIP: 869367102
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Total 13F shares
- 53,354,083
- Total 13F value
- $46,329,126
- Share change
- -2,176,965
- SEC-reported price per share
- $0.87
- Number of holders
- 84
- Value change
- -$1,641,183
- Number of buys
- 29
- Number of sells
- 53
- Shares outstanding
- 16,607,375
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
84
Top holders
10
STRO full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2025
Previous quarter: Q2 2025
SUTRO BIOPHARMA, INC. SEC filings
SUTRO BIOPHARMA, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 869367102
Recent filing periods:
Ownership snapshot
Top reported holders of STRO - Sutro Biopharma, Inc. - Common Stock, $0.001 par value per share (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
SUVRETTA CAPITAL MANAGEME...
Comparable rows
15/15
Latest evidence
30 Jun 2025
13F
13D/G
3/4/5
Lead comparable stake: 4.9%
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 4.9%.
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 VANGUARD GROUP INC's linked filing trail.
Comparable ownership
Top 5
VANGUARD GROUP INC
4.9%
BlackRock, Inc.
2.5%
Edward C. Albini
0.97%
SUVRETTA CAPITAL MANAGEMENT, LLC
39%
Kynam Capital Management, LP
31%
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
|
4.9%
from 13D/G
|
$2,938,288
4,115,250 shares
|
— | 30 Jun 2025 |
| BlackRock, Inc. |
13F
13D/G
Company
|
2.5%
from 13D/G
|
$1,504,193
2,107,008 shares
|
— | 30 Jun 2025 |
| Edward C. Albini |
3/4/5
CFO AND SECRETARY
|
0.97%
|
$141,508
160,805 shares
|
— | 15 May 2025 |
| SUVRETTA CAPITAL MANAGEMENT, LLC |
13F
Company
|
39%
|
$4,632,015
6,488,324 shares
|
— | 30 Jun 2025 |
| Kynam Capital Management, LP |
13F
Company
|
31%
|
$3,632,394
5,088,099 shares
|
— | 30 Jun 2025 |
| MILLENNIUM MANAGEMENT LLC |
13F
Company
|
28%
|
$3,378,348
4,732,243 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
84
Shares
53,354,083
Rows available
84
| 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
100
Q3 2025 holders
84
Holder diff
-16
| 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