XOMA Corporation Insider Trading

XOMA

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Last 12 months

Insiders bought $2.5M on the open market and sold nothing.

Net open-market

+$2.5M

1 buy · 0 sales

Under a 10b5-1 plan

—

no sales

Insiders who bought / sold

1 / 0

executives and directors

Last open-market buy

Dec 2025

Dec 4, 2025

Get an email when XOMA's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Dec 4, 2025	Owen Hughes Chief Executive Officer	Bought	100,000	$25.05	$2.5M	99%	Form 4
Sep 22, 2025	Thomas M. Burns SVP, Finance & CFO	SoldNo plan 3 parts	4,330	$35.99 average	156K	9.7%	Form 4
Jun 30, 2025	Bradley Sitko Chief Investment Officer	Bought	2,000	$25.39	51K	9.0%	Form 4
May 20, 2025	Owen Hughes Chief Executive Officer	SoldNo plan	25,637	$25.38	651K	28%	Form 4
May 20, 2025	Thomas M. Burns SVP, Finance & CFO	SoldNo plan	10,482	$25.38	266K	24%	Form 4
May 16, 2025	BVF GP Holdings LLC Large holder	SoldNo plan 2 parts	392,723	$27.10 average	$10.6M	24%	Form 4
Apr 7, 2025	Bradley Sitko Chief Investment Officer	Bought	2,000	$24.70	49K	11%	Form 4
Apr 3, 2025 – Apr 7, 2025	Joseph M Limber Director	Bought 5 parts	30,000	$25.34 average	760K	483%	Form 4
Apr 1, 2025	Thomas M. Burns SVP, Finance & CFO	Bought	1,000	$25.46	25K	4.1%	Form 4
Mar 31, 2025	Bradley Sitko Chief Investment Officer	Bought 2 parts	1,245	$21.04 average	26K	7.2%	Form 4
Mar 21, 2025	Bradley Sitko Chief Investment Officer	Bought 2 parts	4,134	$23.89 average	99K	30%	Form 4
Jan 24, 2025	Biotechnology Value Fund L P Large holder	SoldNo plan 4 parts	650,717	$26.10 average	$17M	100%	Form 4
Jan 8, 2025	Bradley Sitko Chief Investment Officer	Bought 4 parts	545	$25.64 average	14K	4.7%	Form 4
Dec 31, 2024	Bradley Sitko Chief Investment Officer	Bought	300	$25.90	8K	2.4%	Form 4
Nov 13, 2024	Thomas M. Burns SVP, Finance & CFO	SoldNo plan	9,775	$29.94	293K	30%	Form 4
Nov 13, 2024	Owen Hughes Chief Executive Officer	SoldNo plan	21,881	$29.95	655K	37%	Form 4

Dec 4, 2025
Owen Hughes
Chief Executive Officer · bought 100,000 at $25.05
$2.5M
99% of stake
Sep 22, 2025No plan
Thomas M. Burns
SVP, Finance & CFO · sold 4,330 at avg $35.99
156K
9.7% of stake
Jun 30, 2025
Bradley Sitko
Chief Investment Officer · bought 2,000 at $25.39
51K
9.0% of stake
May 20, 2025No plan
Owen Hughes
Chief Executive Officer · sold 25,637 at $25.38
651K
28% of stake
May 20, 2025No plan
Thomas M. Burns
SVP, Finance & CFO · sold 10,482 at $25.38
266K
24% of stake
May 16, 2025No plan
BVF GP Holdings LLC
Large holder · sold 392,723 at avg $27.10
$10.6M
24% of stake
Apr 7, 2025
Bradley Sitko
Chief Investment Officer · bought 2,000 at $24.70
49K
11% of stake
Apr 3, 2025 – Apr 7, 2025
Joseph M Limber
Director · bought 30,000 at avg $25.34
760K
483% of stake
Apr 1, 2025
Thomas M. Burns
SVP, Finance & CFO · bought 1,000 at $25.46
25K
4.1% of stake
Mar 31, 2025
Bradley Sitko
Chief Investment Officer · bought 1,245 at avg $21.04
26K
7.2% of stake
Mar 21, 2025
Bradley Sitko
Chief Investment Officer · bought 4,134 at avg $23.89
99K
30% of stake
Jan 24, 2025No plan
Biotechnology Value Fund L P
Large holder · sold 650,717 at avg $26.10
$17M
100% of stake
Jan 8, 2025
Bradley Sitko
Chief Investment Officer · bought 545 at avg $25.64
14K
4.7% of stake
Dec 31, 2024
Bradley Sitko
Chief Investment Officer · bought 300 at $25.90
8K
2.4% of stake
Nov 13, 2024No plan
Thomas M. Burns
SVP, Finance & CFO · sold 9,775 at $29.94
293K
30% of stake
Nov 13, 2024No plan
Owen Hughes
Chief Executive Officer · sold 21,881 at $29.95
655K
37% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch XOMA, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in XOMA's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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