CAM
XOMA

Costello Asset Management’s Xoma XOMA Stock Holding History

Costello Asset Management’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
Q1 		$18.8K Hold
600
– – 0.01% 396
2025
Q4 		$16K Hold
600
– – 0.01% 409
2025
Q3 		$23.1K Hold
600
– – 0.01% 358
2025
Q2 		$15.1K Hold
600
– – 0.01% 418
2025
Q1 		$12K Buy
+600
New +$14.4K ﹤0.01% 434

Other funds holding XOMA

BI
BVF Inc San Francisco, California $3.14B AUM 249.53% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
WP
Woodline Partners San Francisco, California $26.4B AUM 44.85% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
OM
Opaleye Management Boston, Massachusetts $759M AUM 124.8% 1-Year Est. Return
GKIM
GW&K Investment Management Boston, Massachusetts $11.3B AUM 31.98% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Costello Asset Management's XOMA Position: Q1 2026 in Review

Costello Asset Management held its Xoma (XOMA) position steady in Q1 2026 at 600 shares worth $18.8K. The position accounts for 0.01% of the portfolio, ranked #396.

Costello Asset Management first reported a position in XOMA in Q1 2025 and has held it in 5 quarters since. The position peaked at $23.1K in Q3 2025. 85 funds tracked by Wall St. Rank hold XOMA as of Q1 2026.

  • Costello Asset Management held 600 shares of Xoma worth $18.8K as of Q1 2026.
  • Costello Asset Management left its Xoma share count unchanged in Q1 2026.
  • Xoma made up 0.01% of Costello Asset Management's portfolio in Q1 2026, its #396 holding.
  • Costello Asset Management first reported a position in Xoma in Q1 2025 and has held it in 5 quarters since.
  • Costello Asset Management's Xoma position peaked at $23.1K in Q3 2025.
  • 85 funds tracked by Wall St. Rank held Xoma as of Q1 2026.

Based on Costello Asset Management's 13F filing for Q1 2026, filed 30 Apr 2026.