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Sutro Biopharma
STRO

78 hedge funds and large institutions have $358M invested in Sutro Biopharma in 2026 Q1 according to their latest regulatory filings, with 26 funds opening new positions, 23 increasing their positions, 13 reducing their positions, and 9 closing their positions.

New
Increased
Maintained
Reduced
Closed

453% more capital invested

Capital invested by funds: $64.8M → $358M (+$294M)

200% more funds holding in top 10

Funds holding in top 10: 2 → 6 (+4)

189% more first-time investments, than exits

New positions opened: 26 | Existing positions closed: 9

80.25% more ownership

Funds ownership: 6.58% → 86.83% (+80%)

77% more repeat investments, than reductions

Existing positions increased: 23 | Existing positions reduced: 13

24% more funds holding

Funds holding: 63 → 78 (+15)

100% less call options, than puts

Call options by funds: $0 | Put options by funds: $2.22M

Holders
78
Holders Change
+15
Holders Change %
+23.81%
% of All Funds
0.96%
Holding in Top 10
6
Holding in Top 10 Change
+4
Holding in Top 10 Change %
+200%
% of All Funds
0.07%
New
26
Increased
23
Reduced
13
Closed
9
Calls
–
Puts
$2.22M
Net Calls
-$2.22M
Net Calls Change
-$2.25M

Top Buyers

Rank Fund Capital Flow
1
BI
BVF Inc
California
+$22.6M
2
SB
Samsara BioCapital
California
+$15.5M
3
O
OrbiMed
New York
+$14.5M
4
EAM
Eventide Asset Management
Massachusetts
+$12.9M
5
PA
Perceptive Advisors
New York
+$12.9M

Top Sellers

Rank Fund Capital Flow
1
Millennium Management
Millennium Management
New York
-$3.76M
2
VPC
Vestal Point Capital
New York
-$2.81M
3
EP
Eversept Partners
New York
-$2.18M
4
TCM
Tang Capital Management
California
-$1.62M
5
GCP
GSA Capital Partners
United Kingdom
-$1.14M
Name Holding Trade Value Shares
Change 		Change in
Stake
Citadel Advisors
26
Citadel Advisors
Florida
$2.93M +$1.54M +85,452 +266%
Renaissance Technologies
27
Renaissance Technologies
New York
$2.44M -$453K -25,041 -20%
VFT
28
Vanguard Fiduciary Trust
Pennsylvania
$2.36M +$1.71M +94,838 New
Susquehanna International Group
29
Susquehanna International Group
Pennsylvania
$2.11M +$1.53M +84,902 New
EP
30
Eversept Partners
New York
$1.82M -$2.18M -120,410 -62%
BGM
31
Burkehill Global Management
New York
$1.78M +$1.29M +71,530 New
Two Sigma Investments
32
Two Sigma Investments
New York
$1.62M +$338K +18,684 +40%
State Street
33
State Street
Massachusetts
$1.3M +$323K +17,852 +52%
Fisher Asset Management
34
Fisher Asset Management
Washington
$879K -$181 -10 -0%
TI
35
Trexquant Investment
Connecticut
$855K +$621K +34,343 New
Northern Trust
36
Northern Trust
Illinois
$826K +$340K +18,787 +131%
Jane Street
37
Jane Street
New York
$692K +$87K +4,815 +21%
Goldman Sachs
38
Goldman Sachs
New York
$677K +$208K +11,518 +74%
GCP
39
GSA Capital Partners
United Kingdom
$643K -$1.14M -63,245 -71%
SC
40
Stempoint Capital
New York
$580K +$421K +23,295 New
Bank of America
41
Bank of America
North Carolina
$470K +$265K +14,661 +348%
Citigroup
42
Citigroup
New York
$469K +$322K +17,802 +1,707%
BHCM
43
Brevan Howard Capital Management
Jersey
$468K +$340K +18,791 New
AIIC
44
AJU IB Investment Company
South Korea
$436K – – –
Invesco
45
Invesco
Georgia
$428K +$3.52K +195 +1%
RC
46
RBF Capital
California
$380K – – –
Hudson Bay Capital Management
47
Hudson Bay Capital Management
Connecticut
$368K +$267K +14,768 New
SPC
48
Sigma Planning Corp
Michigan
$312K +$226K +12,520 New
JF
49
Jump Financial
Illinois
$309K +$224K +12,385 New
Charles Schwab
50
Charles Schwab
California
$263K +$191K +10,577 New
1
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STRO Hedge Fund Activity: Q1 2026 in Review

78 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Sutro Biopharma (STRO) for Q1 2026, worth a combined $358M — up 453% from $64.8M a quarter earlier.

Buyers outnumbered sellers: 26 funds opened new STRO positions and 9 closed out — a net gain of 17 holders — while 23 added to existing stakes and 13 trimmed.

The largest buyer was BVF Inc, opening a new position worth an estimated $22.6M. The largest seller was Millennium Management, cutting an estimated $3.76M.

  • 78 institutional investors held Sutro Biopharma (STRO) as of Q1 2026, up from 63 in Q4 2025.
  • Funds reported $358M of Sutro Biopharma stock for Q1 2026, up 453% quarter-over-quarter.
  • 26 funds opened new Sutro Biopharma positions in Q1 2026 and 9 closed out, a net change of +17 holders.
  • The largest Sutro Biopharma buyer in Q1 2026 was BVF Inc, an estimated $22.6M added.
  • The largest Sutro Biopharma seller in Q1 2026 was Millennium Management, an estimated $3.76M sold.

Based on aggregated 13F filings for Q1 2026.