JO
XOMA

John Overdeck’s Xoma XOMA Stock Holding History

John Overdeck’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 		$1.56M Buy
36,744
+10,669
+41% +$433K ﹤0.01% 3228
2026
Q1 		$818K Buy
26,075
+16,360
+168% +$438K ﹤0.01% 3412
2025
Q4 		$258K Buy
+9,715
New +$313K ﹤0.01% 3652
2021
Q2 		– Sell
-10,856
Closed -$443K – 4642
2021
Q1 		$443K Buy
+10,856
New +$420K ﹤0.01% 3042
2020
Q4 		– Sell
-14,201
Closed -$268K – 3832
2020
Q3 		$268K Buy
+14,201
New +$266K ﹤0.01% 2650
2020
Q2 		– Sell
-10,299
Closed -$210K – 3604
2020
Q1 		$210K Sell
10,299
-8,724
-46% -$201K ﹤0.01% 2620
2019
Q4 		$519K Buy
+19,023
New +$426K ﹤0.01% 2771
2018
Q1 		– Sell
-88,692
Closed -$3.16M – 3568
2017
Q4 		$3.16M Buy
88,692
+77,843
+718% +$2.11M 0.01% 1171
2017
Q3 		$213K Buy
+10,849
New +$121K ﹤0.01% 2568
2016
Q2 		– Sell
-7,878
Closed -$122K – 3291
2016
Q1 		$122K Buy
7,878
+4,686
+147% +$84.4K ﹤0.01% 2669
2015
Q4 		$85K Sell
3,192
-15,216
-83% -$389K ﹤0.01% 2589
2015
Q3 		$277K Buy
+18,408
New +$581K ﹤0.01% 1823
2015
Q1 		– Sell
-28,063
Closed -$2.02M – 2896
2014
Q4 		$2.02M Buy
+28,063
New +$2.4M 0.01% 1023
2014
Q1 		– Sell
-6,903
Closed -$929K – 2300
2013
Q4 		$929K Buy
+6,903
New +$696K 0.01% 1364

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

John Overdeck's XOMA Position: Q2 2026 in Review

John Overdeck increased its Xoma (XOMA) stake by 41% in Q2 2026, buying an estimated $433K and bringing the position to 36,744 shares worth $1.56M. The position accounts for ﹤0.01% of the portfolio, ranked #3228.

John Overdeck first reported a position in XOMA in Q4 2013 and has held it in 14 quarters since. The position peaked at $3.16M in Q4 2017. 97 funds tracked by Wall St. Rank hold XOMA as of Q2 2026.

  • John Overdeck held 36,744 shares of Xoma worth $1.56M as of Q2 2026.
  • John Overdeck bought 10,669 Xoma shares in Q2 2026, an estimated $433K.
  • Xoma made up ﹤0.01% of John Overdeck's portfolio in Q2 2026, its #3228 holding.
  • John Overdeck first reported a position in Xoma in Q4 2013 and has held it in 14 quarters since.
  • John Overdeck's Xoma position peaked at $3.16M in Q4 2017.
  • 97 funds tracked by Wall St. Rank held Xoma as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.