JY
XOMA

Jeff Yass’s Xoma XOMA Stock Holding History

Jeff Yass’s Portfolio XOMA Stock Details XOMA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		– Sell
-6,600
Closed -$207K – 14671
2026
Q1 		$207K Buy
+6,600
New +$177K ﹤0.01% 11636
2024
Q2 		– Sell
-15,400
Closed -$370K – 13371
2024
Q1 		$370K Buy
+15,400
New +$345K ﹤0.01% 9215
2022
Q4 		– Sell
-35,000
Closed -$627K – 13841
2022
Q3 		$627K Buy
35,000
+15,200
+77% +$313K ﹤0.01% 7864
2022
Q2 		$441K Buy
+19,800
New +$406K ﹤0.01% 8585
2017
Q1 		– Sell
-74,100
Closed -$313K – 10123
2016
Q4 		$313K Buy
74,100
+70,240
+1,820% +$436K ﹤0.01% 7899
2016
Q3 		$35K Sell
3,860
-50
-1% -$575 ﹤0.01% 8197
2016
Q2 		$43K Sell
3,910
-2,470
-39% -$35.4K ﹤0.01% 8274
2016
Q1 		$99K Sell
6,380
-7,115
-53% -$128K ﹤0.01% 8437
2015
Q4 		$359K Buy
13,495
+9,060
+204% +$231K ﹤0.01% 7377
2015
Q3 		$67K Sell
4,435
-101,915
-96% -$3.22M ﹤0.01% 9292
2015
Q2 		$8.25M Buy
106,350
+53,760
+102% +$3.87M ﹤0.01% 2224
2015
Q1 		$3.83M Buy
52,590
+20,965
+66% +$1.54M ﹤0.01% 3139
2014
Q4 		$2.27M Sell
31,625
-8,680
-22% -$744K ﹤0.01% 4210
2014
Q3 		$3.39M Buy
40,305
+9,785
+32% +$835K ﹤0.01% 3671
2014
Q2 		$2.8M Buy
30,520
+9,465
+45% +$821K ﹤0.01% 4021
2014
Q1 		$2.19M Buy
21,055
+8,475
+67% +$1.23M ﹤0.01% 4186
2013
Q4 		$1.69M Buy
12,580
+6,325
+101% +$638K ﹤0.01% 4576
2013
Q3 		$562K Buy
6,255
+5,755
+1,151% +$523K ﹤0.01% 6231
2013
Q2 		$36K Buy
+500
New +$37.2K ﹤0.01% 8032

Other funds holding XOMA

BI
BVF Inc San Francisco, California $3.91B AUM 304.52% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
WP
Woodline Partners San Francisco, California $32.4B AUM 58.5% 1-Year Est. Return
NM
Newtyn Management New York $801M AUM 23.14% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
OM
Opaleye Management Boston, Massachusetts $1.1B AUM 197.64% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
WIC
Water Island Capital New York $1.08B AUM 105.75% 1-Year Est. Return

Jeff Yass's XOMA Position: Q2 2026 in Review

Jeff Yass increased its Xoma (XOMA) stake by 381% in Q2 2026, buying an estimated $2.69M and bringing the position to 83,623 shares worth $3.55M. The position accounts for ﹤0.01% of the portfolio, ranked #5283.

Jeff Yass first reported a position in XOMA in Q2 2013 and has held it in 24 quarters since. The position peaked at $22.9M in Q4 2014. 97 funds tracked by Wall St. Rank hold XOMA as of Q2 2026.

  • Jeff Yass held 83,623 shares of Xoma worth $3.55M as of Q2 2026.
  • Jeff Yass bought 66,233 Xoma shares in Q2 2026, an estimated $2.69M.
  • Xoma made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #5283 holding.
  • Jeff Yass first reported a position in Xoma in Q2 2013 and has held it in 24 quarters since.
  • Jeff Yass's Xoma position peaked at $22.9M in Q4 2014.
  • 97 funds tracked by Wall St. Rank held Xoma as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.