Sutro Biopharma, Inc. (STRO)
Nasdaq: STRO · Biological Products, (No Diagnostic Substances) · South San Francisco, CA · filing with the SEC since 2006
Who owns Sutro Biopharma, Inc.
As filed with the SECHolders of 5% or more
6
Perceptive Advisors LLC holds 7.9% of Common stock, $0.001 par value, as its SCHEDULE 13G/A filed Aug 14, 2026 says.
Directors and officers
13
report now, of 29 people on the record since 2018. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 6 named at left.
Holders of 5% or moreshare of the class, as filed
Perceptive Advisors LLC
SCHEDULE 13G/A · filed Aug 14, 2026 · Common stock, $0.001 par value · 5.4% in Apr 21, 2026
Bvf Partners L P/il
SCHEDULE 13G · filed Feb 18, 2026 · Common Stock, $0.001 par value
Affinity Asset Advisors, LLC
SCHEDULE 13G/A · filed May 14, 2026 · Common stock, $0.001 par value per share · 8.8% in Jan 29, 2026
Blackrock, Inc.
SCHEDULE 13G · filed Jul 30, 2026 · Common Stock · 2.5% in Jul 16, 2025
Srinivas Akkaraju
SCHEDULE 13G · filed May 15, 2026 · Common Stock, $0.001 par value per share
Kynam Capital Management, LP
SCHEDULE 13G/A · filed May 15, 2026 · Common stock, $0.001 par value · 6.44% in May 15, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Jul 29, 2025 · Common Stock · reported falling below 5%
Point72 Asset Management, L.P.
SCHEDULE 13G/A · filed Aug 14, 2026 · Common Stock, par value $0.001 per share · reported falling below 5%, from 5.7% in May 1, 2026
Millennium Management LLC
SCHEDULE 13G/A · filed Apr 21, 2026 · Common Stock, par value $0.001 per share · reported falling below 5%, from 5.6% in Jun 30, 2025
Suvretta Capital Management, LLC
SCHEDULE 13G/A · filed Feb 13, 2026 · Common Stock, $0.001 par value · reported falling below 5%, from 0% in Feb 13, 2026
RA Capital Management, L.P.
SCHEDULE 13G/A · filed Aug 14, 2025 · Common Stock, $0.001 par value per share · reported falling below 5%, from 5.3% in Apr 4, 2025
What STRO reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
BofA Securities, Inc
An investee · investee · invested in, named in the 10-K filed Mar 23, 2026
Leerink Partners LLC and TD Securities (USA) LLC
An investee · investee · invested in, named in the 10-K filed Mar 23, 2026
Insider tradesForm 4
0sales
5purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$100,000bought, in dollars
Open-market trades on Form 4 from Sep 30, 2025 to Sep 30, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2025 runs to Sep 30, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window5 of 48 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Chung Jane | Chief Executive Officer | 0 | $0 | 0 | 1 | $0 |
| Chow Gregory K. | CFO | 0 | $0 | 0 | 1 | $0 |
| Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | 0 | $0 | 0 | 1 | $0 |
| Pauling David | Chief Admin. Ofcr. & GC | 0 | $0 | 0 | 1 | $0 |
| Matsui Connie | director | 0 | $0 | 0 | 1 | $0 |