DOSSIER · 13F Holders · Q1 2026

SUTRO BIOPHARMA INC

9 institutions still hold SUTRO BIOPHARMA INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 869367102·9 13F holders·last filed Mar 31, 2026
Market cap
13F value held
$7M
visible holders
Holders
9
filers reporting
Concentration
93.88%
Merck & Co., Inc. #1
top holder share
AI Holders Summary · Q1 2026

9 institutions reported SUTRO BIOPHARMA INC in Q1 2026. Merck & Co., Inc. leads at 93.9% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
Merck & Co., Inc.
CIK 0000310158
$7M272K1.94%Q1 2026
02
AJU IB Investment Co., Ltd.
CIK 0001710065
$436K18K1.43%Q1 2026
03
Fortitude Family Office, LLC
CIK 0001950506
$2K560.00%Q2 2026
04
Bogart Wealth, LLC
CIK 0001715740
$1K500.00%Q1 2026
05
Parallel Advisors, LLC
CIK 0001690010
$1K470.00%Q1 2026
06
Accredited Wealth Management, LLC
CIK 0002056519
$86950.00%Q3 2025
07
EverSource Wealth Advisors, LLC
CIK 0001710537
$473190.00%Q1 2026
08
Advisory Services Network, LLC
CIK 0001573876
$374150.00%Q1 2026
09
CONCOURSE FINANCIAL GROUP SECURITIES, INC.
CIK 0000752798
$00Q2 2025