Jane Street’s Xoma XOMA Stock Holding History

Jane Street’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	$773K	Buy	18,192 +3,673	+25%	+$149K	﹤0.01%	7082
2026 Q1	$455K	Buy	+14,519	New	+$389K	﹤0.01%	8275
2025 Q4	–	Sell	-27,363	Closed	-$1.05M	–	12580
2025 Q3	$1.05M	Buy	+27,363	New	+$850K	﹤0.01%	6199
2023 Q2	–	Sell	-31,497	Closed	-$665K	–	9691
2023 Q1	$665K	Buy	+31,497	New	+$662K	﹤0.01%	5802
2020 Q3	–	Sell	-12,266	Closed	-$242K	–	8043
2020 Q2	$242K	Buy	+12,266	New	+$269K	﹤0.01%	6141
2018 Q1	–	Sell	-9,965	Closed	-$355K	–	5500
2017 Q4	$355K	Buy	+9,965	New	+$270K	﹤0.01%	3576
2015 Q4	–	Sell	-5,782	Closed	-$87K	–	4550
2015 Q3	$87K	Buy	5,782 +4,711	+440%	+$149K	﹤0.01%	3387
2015 Q2	$83K	Buy	+1,071	New	+$77.1K	﹤0.01%	3463
2015 Q1	–	Sell	-1,252	Closed	-$90K	–	3550
2014 Q4	$90K	Buy	1,252 +585	+88%	+$50.1K	﹤0.01%	2346
2014 Q3	$56K	Buy	+667	New	+$56.9K	﹤0.01%	2412
2013 Q3	–	Sell	-1,392	Closed	-$101K	–	3185
2013 Q2	$101K	Buy	+1,392	New	+$104K	﹤0.01%	2436

Other funds holding XOMA

BVF Inc San Francisco, California $3.91B AUM 304.52% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Woodline Partners San Francisco, California $32.4B AUM 58.5% 1-Year Est. Return

Newtyn Management New York $801M AUM 23.14% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Opaleye Management Boston, Massachusetts $1.1B AUM 197.64% 1-Year Est. Return

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

Jane Street's XOMA Position: Q2 2026 in Review

Jane Street increased its Xoma (XOMA) stake by 25% in Q2 2026, buying an estimated $149K and bringing the position to 18,192 shares worth $773K. The position accounts for ﹤0.01% of the portfolio, ranked #7082.

Jane Street first reported a position in XOMA in Q2 2013 and has held it in 11 quarters since. The position peaked at $1.05M in Q3 2025. 98 funds tracked by Wall St. Rank hold XOMA as of Q2 2026.

Jane Street held 18,192 shares of Xoma worth $773K as of Q2 2026.
Jane Street bought 3,673 Xoma shares in Q2 2026, an estimated $149K.
Xoma made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #7082 holding.
Jane Street first reported a position in Xoma in Q2 2013 and has held it in 11 quarters since.
Jane Street's Xoma position peaked at $1.05M in Q3 2025.
98 funds tracked by Wall St. Rank held Xoma as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.