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 		$2.14M Buy
+50,400
New +$2.04M ﹤0.01% 6334
2016
Q4 		– Sell
-4,310
Closed -$40K – 10254
2016
Q3 		$40K Buy
4,310
+245
+6% +$2.82K ﹤0.01% 8181
2016
Q2 		$45K Sell
4,065
-1,940
-32% -$27.8K ﹤0.01% 8264
2016
Q1 		$93K Sell
6,005
-2,975
-33% -$53.6K ﹤0.01% 8463
2015
Q4 		$239K Buy
8,980
+2,470
+38% +$63.1K ﹤0.01% 8120
2015
Q3 		$98K Sell
6,510
-88,305
-93% -$2.79M ﹤0.01% 9151
2015
Q2 		$7.36M Buy
94,815
+63,685
+205% +$4.59M ﹤0.01% 2380
2015
Q1 		$2.27M Sell
31,130
-6,675
-18% -$490K ﹤0.01% 4085
2014
Q4 		$2.71M Sell
37,805
-2,635
-7% -$226K ﹤0.01% 3902
2014
Q3 		$3.4M Buy
40,440
+17,100
+73% +$1.46M ﹤0.01% 3663
2014
Q2 		$2.14M Buy
23,340
+9,545
+69% +$828K ﹤0.01% 4539
2014
Q1 		$1.44M Buy
13,795
+6,760
+96% +$981K ﹤0.01% 4880
2013
Q4 		$947K Buy
7,035
+2,070
+42% +$209K ﹤0.01% 5619
2013
Q3 		$446K Buy
+4,965
New +$451K ﹤0.01% 6595

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.