STRO · Sutro Biopharma, Inc. · Shareholders & Ownership
$9.62
+0.11 (+1.16%)
At close · Nov 4
Return incl. dividend (before tax)
Market Cap
$158.43M
Shares
16.58M
Volume · Nov 4
80.1K
Avg daily vol (3M)
310K
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Every disclosed holder of STRO in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns STRO
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 16,456,392 | 99.25% |
| Insiders (Forms 3, 4, 5) | 139,844 | 0.84% |
| 13D/G-only blocks | 3,189,628 | 19.24% |
| Remaining | 3,204,693 | -19.33% |
| Registered funds (N-PORT, not summed) | 3,104,005 | 18.72% |
Shares outstanding: 16,581,171, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of STRO
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
PERCEPTIVE ADVISORS LLC
13F
CIK 1224962 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,304,846 | ||
| 1.1 |
PERCEPTIVE ADVISORS LLC
13G
CIK 1224962 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(c), passive investor, not summed
|
1,304,846 | ||
| 2 |
BIOTECHNOLOGY VALUE FUND L P
13G
CIK 918923 · Unknown · Feb 10, 2026
Rule 13d-1(c), passive investor
|
1,251,788 | ||
| 3 |
|
1,251,788 | ||
| 4 |
Affinity Asset Advisors, LLC
13F
CIK 1773195 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,172,487 | ||
| 5 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,122,655 | ||
| 5.1 |
BlackRock, Inc.
13G
CIK 2012383 · Holding company · Jun 30, 2026
Rule 13d-1(b), qualified institution, not summed
|
1,065,366 | ||
| 5.2 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
326,271 | ||
| 5.3 |
iShares Russell 2000 Value ETF
Fund
S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
98,529 | ||
| 5.4 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
47,714 | ||
| 5.5 |
Master Small Cap Index Series
Fund
S000002716 · Registered fund · Jun 30, 2026
Quantitative Master Series LLC, not summed
|
23,951 | ||
| 6 |
|
1,062,872 | ||
| 7 |
SAMSARA BIOCAPITAL, LLC
13F
CIK 1744967 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,062,872 | ||
| 8 |
Kynam Capital Management, LP
13F
CIK 1907884 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
872,558 | ||
| 9 |
ORBIMED ADVISORS LLC
13F
CIK 1055951 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
743,944 | ||
| 10 |
Balyasny Asset Management L.P.
13F
CIK 1218710 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
711,162 | ||
| 11 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
694,219 | ||
| 12 |
EVENTIDE ASSET MANAGEMENT, LLC
13F
CIK 1442891 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
585,262 | ||
| 12.1 |
Eventide Healthcare & Life Sciences Fund
Fund
S000039514 · Registered fund · Jun 30, 2026
MUTUAL FUND SERIES TRUST, not summed
|
585,262 | ||
| 13 |
Velan Capital Investment Management LP
13F
CIK 1848809 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
512,160 | ||
| 14 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
501,524 | ||
| 15 |
Woodline Partners LP
13F
CIK 1784547 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
458,029 | ||
| 16 |
ADAGE CAPITAL PARTNERS GP, L.L.C.
13G
CIK 1165408 · Registered investment adviser · Dec 31, 2023
Rule 13d-1(c), passive investor, unconfirmed, last confirmed Dec 31, 2023
|
446,780 | ||
| 17 |
ADAR1 Capital Management, LLC
13F
CIK 1940272 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
404,014 | ||
| 18 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
389,692 | ||
| 19 |
ACADIAN ASSET MANAGEMENT LLC
13F
CIK 916542 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
373,839 | ||
| 20 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
365,972 | ||
| 21 |
|
305,979 | ||
| 21.1 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
5,900 | ||
| 21.2 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
403 | ||
| 21.3 |
State Street Balanced Index Fund
Fund
S000082802 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
151 | ||
| 22 |
Merck & Co., Inc.
13F
CIK 310158 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
272,351 | ||
| 23 |
ACUTA CAPITAL PARTNERS, LLC
13F
CIK 1582844 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
270,251 | ||
| 24 |
AMERIPRISE FINANCIAL INC
13F
CIK 820027 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
244,669 | ||
| 24.1 |
Columbia Research Enhanced Small Cap ETF
Fund
S000095313 · Registered fund · Jun 30, 2026
Columbia ETF Trust I, not summed
|
17 | ||
| 25 |
Point72 Asset Management, L.P.
13F
CIK 1603466 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
237,827 | ||
| 25.1 |
Point72 Asset Management, L.P.
13G
CIK 1603466 · Registered investment adviser · Jun 30, 2026
Rule 13d-1(c), passive investor, not summed
|
237,827 | ||
| 26 |
KVP Capital Advisors, LP
13F
CIK 1858198 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
226,575 | ||
| 27 |
Adage Capital Management, L.P.
13G
CIK 1535978 · Investment adviser · Sep 30, 2024
Rule 13d-1(b), qualified institution, unconfirmed, last confirmed Sep 30, 2024
|
225,013 | ||
| 28 |
|
208,512 | ||
| 29 |
Millennium Management LLC
13G
CIK 1319244 · Unknown · Sep 30, 2024
Rule 13d-1(c), passive investor, unconfirmed, last confirmed Sep 30, 2024
|
203,175 | ||
| 30 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
201,688 | ||
| 31 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
197,562 | ||
| 32 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
177,208 | ||
| 33 |
MARSHALL WACE, LLP
13F
CIK 1318757 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
175,246 | ||
| 34 |
|
167,997 | ||
| 34.1 |
Nuveen Quant Small Cap Equity Fund
Fund
S000005386 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
126,290 | ||
| 34.2 |
Nuveen Small Cap Blend Index Fund
Fund
S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
21,156 | ||
| 34.3 |
Nuveen Equity Index Fund
Fund
S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
13,975 | ||
| 34.4 |
Nuveen Life Small Cap Equity Fund
Fund
S000005093 · Registered fund · Jun 30, 2026
TIAA-CREF Life Funds, not summed
|
2,605 | ||
| 35 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
159,627 | ||
| 36 |
Seven Fleet Capital Management LP
13F
CIK 2092021 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
159,118 | ||
| 37 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
149,216 | ||
| 37.1 |
Goldman Sachs Small Cap Equity Insights Fund
Fund
S000009329 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
77,195 | ||
| 37.2 |
Goldman Sachs Small Cap Value Insights Fund
Fund
S000014929 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
66,530 | ||
| 37.3 |
Goldman Sachs Small Cap Growth Insights Fund
Fund
S000014930 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
|
13,476 | ||
| 37.4 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · Aug 31, 2026
Goldman Sachs ETF Trust, not summed
|
12,578 | ||
| 37.5 |
Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund
Fund
S000009355 · Registered fund · Jun 30, 2026
Goldman Sachs Variable Insurance Trust, not summed
|
6,882 | ||
| 38 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
125,933 | ||
| 38.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
8,229 | ||
| 38.2 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
252 | ||
| 39 |
Qube Research & Technologies Ltd
13F
CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
106,610 | ||
| 40 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
104,232 | ||
| 41 |
CITADEL ADVISORS LLC
13F
CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
101,965 | ||
| 42 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · Aug 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
91,400 | ||
| 43 |
Y-Intercept (Hong Kong) Ltd
13F
CIK 1772875 · Exempt reporting adviser · Sep 30, 2026
|
90,536 | ||
| 44 |
RENAISSANCE TECHNOLOGIES LLC
13F
CIK 1037389 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
86,324 | ||
| 45 |
VANGUARD U.S. MOMENTUM FACTOR ETF
Fund
S000061302 · Registered fund · Aug 31, 2026
VANGUARD WELLINGTON FUND, not summed
|
69,761 | ||
| 46 |
MACKENZIE FINANCIAL CORP
13F
CIK 919859 · Registered investment adviser · Sep 30, 2026
|
68,513 | ||
| 47 |
JPMorgan U.S. Small Company Fund
Fund
S000002795 · Registered fund · Jun 30, 2026
JPMorgan Trust I, not summed
|
60,304 | ||
| 48 |
Invesco Ltd.
13F
CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
57,305 | ||
| 48.1 |
Invesco Russell 2000 Dynamic Multifactor ETF
Fund
S000064608 · Registered fund · Aug 31, 2026
Invesco Exchange-Traded Self-Indexed Fund Trust, not summed
|
28,745 | ||
| 48.2 |
Invesco RAFI US 1500 Small-Mid ETF
Fund
S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
|
16,529 | ||
| 48.3 |
Invesco NASDAQ Future Gen 200 ETF
Fund
S000077288 · Registered fund · Aug 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
|
3,821 | ||
| 49 |
Squarepoint Ops LLC
13F
CIK 1642575 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
55,539 | ||
| 50 |
XTX Topco Ltd
13F
CIK 1828301 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
52,169 |
6 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
Showing 1–50 of 186 holders
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Key facts
CIK
1382101
CUSIP
869367201
13F (30d)
14 filings
14 filers
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