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XOMA

Xoma
XOMA

Delisted

XOMA was delisted on the 13th of July, 2026.

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85 hedge funds and large institutions have $313M invested in Xoma in 2026 Q1 according to their latest regulatory filings, with 21 funds opening new positions, 28 increasing their positions, 16 reducing their positions, and 9 closing their positions.

New
Increased
Maintained
Reduced
Closed

33,783% more call options, than puts

Call options by funds: $2.03M | Put options by funds: $6K

133% more first-time investments, than exits

New positions opened: 21 | Existing positions closed: 9

75% more repeat investments, than reductions

Existing positions increased: 28 | Existing positions reduced: 16

36% more capital invested

Capital invested by funds: $230M → $313M (+$83.2M)

15% more funds holding

Funds holding: 74 → 85 (+11)

14.18% more ownership

Funds ownership: 69.72% → 83.9% (+14%)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

Holders
85
Holders Change
+11
Holders Change %
+14.86%
% of All Funds
1.05%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.01%
New
21
Increased
28
Reduced
16
Closed
9
Calls
$2.03M
Puts
$6K
Net Calls
+$2.03M
Net Calls Change
+$2.01M

Top Buyers

1
WP
Woodline Partners
California
+$10.1M
2
GKIM
GW&K Investment Management
Massachusetts
+$6.22M
3
Millennium Management
Millennium Management
New York
+$5.49M
4
Fidelity Investments
Fidelity Investments
Massachusetts
+$3.78M
5
Citadel Advisors
Citadel Advisors
Florida
+$2.64M

Top Sellers

1
HS
HighVista Strategies
Massachusetts
-$1.77M
2
SCM
Stonepine Capital Management
Oregon
-$1.22M
3
Renaissance Technologies
Renaissance Technologies
New York
-$1.04M
4
Wellington Management Group
Wellington Management Group
Massachusetts
-$787K
5
Los Angeles Capital Management
Los Angeles Capital Management
California
-$513K
Name Holding Trade Value Shares
Change 		Change in
Stake
BI
1
BVF Inc
California
$81.3M – – –
Morgan Stanley
2
Morgan Stanley
New York
$53.4M -$335K -12,511 -0.7%
Fidelity Investments
3
Fidelity Investments
Massachusetts
$40.9M +$3.78M +141,085 +12%
BlackRock
4
BlackRock
New York
$20.3M +$948K +35,399 +6%
WP
5
Woodline Partners
California
$20.1M +$10.1M +377,068 +143%
VCM
6
Vanguard Capital Management
Pennsylvania
$17.2M +$14.7M +549,796 New
OM
7
Opaleye Management
Massachusetts
$9.41M +$198K +7,410 +3%
GKIM
8
GW&K Investment Management
Massachusetts
$7.28M +$6.22M +232,141 New
Geode Capital Management
9
Geode Capital Management
Massachusetts
$7.21M +$220K +8,200 +4%
Millennium Management
10
Millennium Management
New York
$6.43M +$5.49M +204,920 New
State Street
11
State Street
Massachusetts
$6.06M +$488K +18,240 +10%
Dimensional Fund Advisors
12
Dimensional Fund Advisors
Texas
$4.18M +$2.41M +90,025 +208%
TA
13
TLS Advisors
Florida
$3.6M +$1.79M +66,944 +140%
Citadel Advisors
14
Citadel Advisors
Florida
$3.09M +$2.64M +98,638 New
Northern Trust
15
Northern Trust
Illinois
$2.93M +$82.7K +3,087 +3%
VPM
16
Vanguard Portfolio Management
Pennsylvania
$2.69M +$2.3M +85,797 New
Bank of New York Mellon
17
Bank of New York Mellon
New York
$2.35M +$177K +6,600 +10%
UBS Group
18
UBS Group
Switzerland
$2.28M +$1.24M +46,486 +178%
SCM
19
Stonepine Capital Management
Oregon
$2.18M -$1.22M -45,500 -40%
SC
20
Simcoe Capital
Washington
$2.13M +$1.82M +68,053 New
VFT
21
Vanguard Fiduciary Trust
Pennsylvania
$2.09M +$1.79M +66,664 New
PAM
22
Panagora Asset Management
Massachusetts
$1.84M +$1M +37,433 +176%
HS
23
HighVista Strategies
Massachusetts
$1.47M -$1.77M -66,103 -59%
CM
24
CM Management
Florida
$1.25M – – –
RC
25
RBF Capital
California
$941K – – –
1
2 3 4

XOMA Hedge Fund Activity: Q1 2026 in Review

85 of the 8,125 institutional investors tracked by Wall St. Rank reported a position in Xoma (XOMA) for Q1 2026, worth a combined $313M — up 36% from $230M a quarter earlier.

Buyers outnumbered sellers: 21 funds opened new XOMA positions and 9 closed out — a net gain of 12 holders — while 28 added to existing stakes and 16 trimmed.

The largest buyer was Woodline Partners, adding an estimated $10.1M. The largest seller was HighVista Strategies, cutting an estimated $1.77M.

  • 85 institutional investors held Xoma (XOMA) as of Q1 2026, up from 74 in Q4 2025.
  • Funds reported $313M of Xoma stock for Q1 2026, up 36% quarter-over-quarter.
  • 21 funds opened new Xoma positions in Q1 2026 and 9 closed out, a net change of +12 holders.
  • The largest Xoma buyer in Q1 2026 was Woodline Partners, an estimated $10.1M added.
  • The largest Xoma seller in Q1 2026 was HighVista Strategies, an estimated $1.77M sold.

Based on aggregated 13F filings for Q1 2026.