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 		$3.55M Buy
83,623
+66,233
+381% +$2.69M ﹤0.01% 5283
2026
Q1 		$546K Buy
17,390
+7,797
+81% +$209K ﹤0.01% 9435
2025
Q4 		$255K Buy
+9,593
New +$309K ﹤0.01% 10320
2025
Q3 		– Sell
-11,559
Closed -$291K – 14078
2025
Q2 		$291K Buy
11,559
+1,305
+13% +$31.3K ﹤0.01% 10409
2025
Q1 		$204K Buy
+10,254
New +$247K ﹤0.01% 10887
2023
Q2 		– Sell
-50,529
Closed -$1.07M – 13290
2023
Q1 		$1.07M Buy
50,529
+25,792
+104% +$542K ﹤0.01% 6640
2022
Q4 		$455K Buy
+24,737
New +$449K ﹤0.01% 8112
2020
Q2 		– Sell
-49,626
Closed -$1.01M – 11053
2020
Q1 		$1.01M Buy
49,626
+25,264
+104% +$583K ﹤0.01% 5376
2019
Q4 		$665K Buy
+24,362
New +$545K ﹤0.01% 6368
2018
Q2 		– Sell
-49,609
Closed -$1M – 10547
2018
Q1 		$1M Buy
+49,609
New +$1.39M ﹤0.01% 5234
2016
Q4 		– Sell
-4,553
Closed -$28.3K – 10253
2016
Q3 		$41K Sell
4,553
-3,738
-45% -$43K ﹤0.01% 8175
2016
Q2 		$91K Buy
8,291
+2,930
+55% +$42K ﹤0.01% 8064
2016
Q1 		$83K Buy
5,361
+4,525
+541% +$81.5K ﹤0.01% 8505
2015
Q4 		$22K Sell
836
-31,834
-97% -$813K ﹤0.01% 9213
2015
Q3 		$491K Buy
32,670
+29,649
+981% +$935K ﹤0.01% 7161
2015
Q2 		$234K Sell
3,021
-78,348
-96% -$5.64M ﹤0.01% 9013
2015
Q1 		$5.92M Sell
81,369
-237,324
-74% -$17.4M ﹤0.01% 2499
2014
Q4 		$22.9M Buy
318,693
+293,037
+1,142% +$25.1M 0.01% 1242
2014
Q3 		$2.16M Buy
25,656
+11,889
+86% +$1.01M ﹤0.01% 4474
2014
Q2 		$1.26M Buy
13,767
+4,408
+47% +$382K ﹤0.01% 5557
2014
Q1 		$976K Sell
9,359
-1,086
-10% -$158K ﹤0.01% 5563
2013
Q4 		$1.41M Sell
10,445
-2,773
-21% -$280K ﹤0.01% 4891
2013
Q3 		$1.18M Buy
13,218
+7,458
+129% +$678K ﹤0.01% 4993
2013
Q2 		$418K Buy
+5,760
New +$429K ﹤0.01% 6312

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.