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Compass Therapeutics
CMPX

201 hedge funds and large institutions have $919M invested in Compass Therapeutics in 2026 Q1 according to their latest regulatory filings, with 50 funds opening new positions, 75 increasing their positions, 48 reducing their positions, and 19 closing their positions.

New
Increased
Maintained
Reduced
Closed

1,626% more call options, than puts

Call options by funds: $19.2M | Put options by funds: $1.11M

163% more first-time investments, than exits

New positions opened: 50 | Existing positions closed: 19

56% more repeat investments, than reductions

Existing positions increased: 75 | Existing positions reduced: 48

16% more funds holding

Funds holding: 173 → 201 (+28)

3.91% more ownership

Funds ownership: 92.29% → 96.2% (+3.9%)

4% more capital invested

Capital invested by funds: $881M → $919M (+$37.6M)

38% less funds holding in top 10

Funds holding in top 10: 8 → 5 (-3)

Holders
201
Holders Change
+28
Holders Change %
+16.18%
% of All Funds
2.47%
Holding in Top 10
5
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-37.5%
% of All Funds
0.06%
New
50
Increased
75
Reduced
48
Closed
19
Calls
$19.2M
Puts
$1.11M
Net Calls
+$18.1M
Net Calls Change
+$18.1M

Top Buyers

1
Adage Capital Partners
Adage Capital Partners
Massachusetts
+$23.4M
2
UBS Group
UBS Group
Switzerland
+$12.8M
3
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT)
United Kingdom
+$12.2M
4
LGM
Logos Global Management
California
+$11.5M
5
State Street
State Street
Massachusetts
+$10.4M

Top Sellers

1
Blackstone Inc
Blackstone Inc
New York
-$24.6M
2
Millennium Management
Millennium Management
New York
-$13.1M
3
TECP
Trails Edge Capital Partners
Georgia
-$7.6M
4
SI
Sofinnova Investments
California
-$7.56M
5
Marshall Wace
Marshall Wace
United Kingdom
-$6.79M
Name Holding Trade Value Shares
Change 		Change in
Stake
TECP
201
Trails Edge Capital Partners
Georgia
– -$7.6M -1,415,273 Closed
Marshall Wace
202
Marshall Wace
United Kingdom
– -$6.79M -1,263,647 Closed
HS
203
HighVista Strategies
Massachusetts
– -$1.32M -245,532 Closed
Arrowstreet Capital
204
Arrowstreet Capital
Massachusetts
– -$1.13M -210,249 Closed
BFM
205
Boothbay Fund Management
New York
– -$1.1M -205,024 Closed
GCP
206
GSA Capital Partners
United Kingdom
– -$719K -133,810 Closed
NIM
207
NEOS Investment Management
Connecticut
– -$546K -101,676 Closed
CM
208
CM Management
Florida
– -$537K -100,000 Closed
SC
209
SummitTX Capital
Texas
– -$437K -81,449 Closed
Jane Street
210
Jane Street
New York
– -$376K -70,063 Closed
CC
211
Caxton Corporation
New Jersey
– -$158K -29,495 Closed
AF
212
Avanza Fonder
Sweden
– -$147K -27,347 Closed
Two Sigma Advisers
213
Two Sigma Advisers
New York
– -$81.6K -15,200 Closed
FHA
214
Flagship Harbor Advisors
Massachusetts
– -$32.2K -6,000 Closed
Acadian Asset Management
215
Acadian Asset Management
Massachusetts
– -$26K -4,867 Closed
AB
216
Amalgamated Bank
New York
– -$22K -4,111 Closed
Royal Bank of Canada
217
Royal Bank of Canada
Ontario, Canada
– -$22K -3,815 -100%
CIA
218
Cape Investment Advisory
Georgia
– -$10.8K -2,002 Closed
Bessemer Group
219
Bessemer Group
New Jersey
– -$3K -526 Closed
AAP
220
Arax Advisory Partners
Colorado
– -$97 -18 Closed
5 6 7 8
9

CMPX Hedge Fund Activity: Q1 2026 in Review

201 of the 8,126 institutional investors tracked by Wall St. Rank reported a position in Compass Therapeutics (CMPX) for Q1 2026, worth a combined $919M — up 4.3% from $881M a quarter earlier.

Buyers outnumbered sellers: 50 funds opened new CMPX positions and 19 closed out — a net gain of 31 holders — while 75 added to existing stakes and 48 trimmed.

The largest buyer was Adage Capital Partners, adding an estimated $23.4M. The largest seller was Blackstone Inc, cutting an estimated $24.6M.

  • 201 institutional investors held Compass Therapeutics (CMPX) as of Q1 2026, up from 173 in Q4 2025.
  • Funds reported $919M of Compass Therapeutics stock for Q1 2026, up 4.3% quarter-over-quarter.
  • 50 funds opened new Compass Therapeutics positions in Q1 2026 and 19 closed out, a net change of +31 holders.
  • The largest Compass Therapeutics buyer in Q1 2026 was Adage Capital Partners, an estimated $23.4M added.
  • The largest Compass Therapeutics seller in Q1 2026 was Blackstone Inc, an estimated $24.6M sold.

Based on aggregated 13F filings for Q1 2026.