Thomas M. Burns

Insider

First SEC filing: April 7, 2015 · Latest: May 22, 2017

On this page

Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.
Compensation Executive pay disclosed in company proxy statements.

Insider transactions

0 buys (P) 3 sells (S) Net: $-155,820 + 48 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

48 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D
Sept. 22, 2025	XOMA	S	15	$36.81	$552	30,079 Direct	-0.05%	Disposed
Sept. 22, 2025	XOMA	S	15	$36.93	$554	30,094 Direct	-0.05%	Disposed
Sept. 22, 2025	XOMA	S	4,300	$35.98	$154,714	30,109 Direct	-12.50%	Disposed
Sept. 19, 2025	XOMA	M	11,846	—	—	44,208 Direct	-21.13%	Disposed
Sept. 19, 2025	XOMA	M	11,846	—	—	34,409 Direct	+52.50%	Acquired
May 20, 2025	XOMA	S	10,482	$25.38	$266,033	22,563 Direct	-31.72%	Disposed
May 19, 2025	XOMA	M	17,773	—	—	56,054 Direct	-24.07%	Disposed
May 19, 2025	XOMA	M	17,773	—	—	33,045 Direct	+116.38%	Acquired
April 1, 2025	XOMA	P	1,000	$25.46	$25,460	2,000 Direct	+100.00%	Acquired
Nov. 13, 2024	XOMA	S	9,775	$29.94	$292,664	14,553 Direct	-40.18%	Disposed
Nov. 11, 2024	XOMA	M	17,773	—	—	73,827 Direct	-19.40%	Disposed
Nov. 11, 2024	XOMA	M	17,773	—	—	24,328 Direct	+271.14%	Acquired
May 18, 2023	XOMA	A	91,600	—	—	91,600 Direct	—	Acquired
Nov. 8, 2022	XOMA	A	11,000	—	—	11,000 Direct	—	Acquired
July 15, 2022	XOMA	M	2,000	—	—	75,778 Direct	-2.57%	Disposed
July 15, 2022	XOMA	S 10b5-1	2,000	$31.66	$63,320	6,555 Direct	-23.38%	Disposed
July 15, 2022	XOMA	M	2,000	$4.03	$8,060	8,555 Direct	+30.51%	Acquired
March 23, 2022	XOMA	M	161	—	—	15,500 Direct	-1.03%	Disposed
March 23, 2022	XOMA	S	161	$30.00	$4,830	6,555 Direct	-2.40%	Disposed
March 23, 2022	XOMA	M	161	$4.03	$649	6,716 Direct	+2.46%	Acquired
March 22, 2022	XOMA	M	2,339	$4.03	$9,426	8,894 Direct	+35.68%	Acquired
March 22, 2022	XOMA	M	2,339	—	—	15,661 Direct	-12.99%	Disposed
March 22, 2022	XOMA	S	2,339	$30.02	$70,217	6,555 Direct	-26.30%	Disposed
March 21, 2022	XOMA	M	12,000	—	—	18,000 Direct	-40.00%	Disposed
March 21, 2022	XOMA	S	12,000	$29.00	$348,000	6,555 Direct	-64.67%	Disposed
March 21, 2022	XOMA	M	12,000	$4.03	$48,360	18,555 Direct	+183.07%	Acquired
Feb. 22, 2022	XOMA	A	28,000	—	—	28,000 Direct	—	Acquired
April 9, 2021	XOMA	A	1,000	$25.00	$25,000	1,000 Direct	—	Acquired
Feb. 17, 2021	XOMA	A	20,055	—	—	20,055 Direct	—	Acquired
Dec. 15, 2020	XOMA	M	15,000	—	—	7,000 Direct	-68.18%	Disposed
Dec. 15, 2020	XOMA	A	2,000	$25.00	$50,000	2,000 Direct	—	Acquired
Dec. 15, 2020	XOMA	S 10b5-1	5,607	$42.04	$235,718	6,555 Direct	-46.10%	Disposed
Dec. 15, 2020	XOMA	S 10b5-1	9,393	$41.02	$385,301	12,162 Direct	-43.58%	Disposed
Dec. 15, 2020	XOMA	M	15,000	$4.03	$60,450	21,555 Direct	+228.83%	Acquired
Nov. 23, 2020	XOMA	M	5,125	—	—	22,000 Direct	-18.89%	Disposed
Nov. 23, 2020	XOMA	S 10b5-1	5,125	$32.93	$168,766	6,555 Direct	-43.88%	Disposed
Nov. 23, 2020	XOMA	M	5,125	$4.03	$20,654	11,680 Direct	+78.18%	Acquired
Nov. 20, 2020	XOMA	M	6,875	—	—	27,125 Direct	-20.22%	Disposed
Nov. 20, 2020	XOMA	S 10b5-1	426	$33.35	$14,207	6,555 Direct	-6.10%	Disposed
Nov. 20, 2020	XOMA	S 10b5-1	6,449	$32.46	$209,335	6,981 Direct	-48.02%	Disposed
Nov. 20, 2020	XOMA	M	6,875	$4.03	$27,706	13,430 Direct	+104.88%	Acquired
Nov. 5, 2020	XOMA	M	8,000	—	—	34,000 Direct	-19.05%	Disposed
Nov. 5, 2020	XOMA	S 10b5-1	726	$27.50	$19,965	6,555 Direct	-9.97%	Disposed
Nov. 5, 2020	XOMA	S 10b5-1	7,274	$25.98	$188,979	7,281 Direct	-49.98%	Disposed
Nov. 5, 2020	XOMA	M	8,000	$4.03	$32,240	14,555 Direct	+122.04%	Acquired
March 13, 2020	XOMA	A	22,000	—	—	22,000 Direct	—	Acquired
Sept. 19, 2019	XOMA	M	4,171	—	—	42,000 Direct	-9.03%	Disposed
Sept. 19, 2019	XOMA	S 10b5-1	500	$21.84	$10,920	6,555 Direct	-7.09%	Disposed
Sept. 19, 2019	XOMA	S 10b5-1	3,671	$21.35	$78,376	7,055 Direct	-34.23%	Disposed
Sept. 19, 2019	XOMA	M	4,171	$4.03	$16,809	10,726 Direct	+63.63%	Acquired
Sept. 18, 2019	XOMA	M	3,829	—	—	46,171 Direct	-7.66%	Disposed
Sept. 18, 2019	XOMA	S 10b5-1	3,829	$21.96	$84,085	6,555 Direct	-36.87%	Disposed
Sept. 18, 2019	XOMA	M	3,829	$4.03	$15,431	10,384 Direct	+58.41%	Acquired
Feb. 13, 2019	XOMA	A	23,000	—	—	23,000 Direct	—	Acquired
April 27, 2018	XOMA	M	2,655	—	—	24,000 Direct	-9.96%	Disposed
April 27, 2018	XOMA	S	2,655	$24.77	$65,764	6,555 Direct	-28.83%	Disposed
April 27, 2018	XOMA	M	2,655	$5.50	$14,602	9,210 Direct	+40.50%	Acquired
April 26, 2018	XOMA	M	8,345	—	—	26,655 Direct	-23.84%	Disposed
April 26, 2018	XOMA	S	8,345	$24.69	$206,038	6,555 Direct	-56.01%	Disposed
April 26, 2018	XOMA	M	8,345	$5.50	$45,898	14,900 Direct	+127.31%	Acquired
Feb. 14, 2018	XOMA	A	25,000	—	—	25,000 Direct	—	Acquired
Nov. 15, 2017	XOMA	M	8,392	—	—	77,778 Direct	-9.74%	Disposed
Nov. 15, 2017	XOMA	S	200	$27.44	$5,488	6,555 Direct	-2.96%	Disposed
Nov. 15, 2017	XOMA	S	8,192	$27.04	$221,512	6,755 Direct	-54.81%	Disposed
Nov. 15, 2017	XOMA	M	8,392	$4.03	$33,820	14,947 Direct	+128.02%	Acquired
Nov. 14, 2017	XOMA	M	6,847	—	—	86,170 Direct	-7.36%	Disposed
Nov. 14, 2017	XOMA	S	250	$30.49	$7,622	6,555 Direct	-3.67%	Disposed
Nov. 14, 2017	XOMA	S	600	$29.61	$17,766	6,805 Direct	-8.10%	Disposed
Nov. 14, 2017	XOMA	S	3,180	$28.98	$92,156	7,405 Direct	-30.04%	Disposed
Nov. 14, 2017	XOMA	S	2,817	$27.16	$76,510	10,585 Direct	-21.02%	Disposed
Nov. 14, 2017	XOMA	M	6,847	$4.03	$27,593	13,402 Direct	+104.45%	Acquired
Nov. 13, 2017	XOMA	M	6,983	—	—	93,017 Direct	-6.98%	Disposed
Nov. 13, 2017	XOMA	S	486	$31.77	$15,440	6,555 Direct	-6.90%	Disposed
Nov. 13, 2017	XOMA	S	6,497	$30.93	$200,952	7,041 Direct	-47.99%	Disposed
Nov. 13, 2017	XOMA	M	6,983	$4.03	$28,141	13,538 Direct	+106.53%	Acquired
March 21, 2017	XOMA	S	2,598	$5.40	$14,029	6,555 Direct	-28.38%	Disposed
Feb. 10, 2017	XOMA	A	100,000	—	—	100,000 Direct	—	Acquired
Dec. 22, 2016	XOMA	A	35,000	—	—	35,000 Direct	—	Acquired
March 22, 2016	XOMA	S	19,249	$0.78	$15,014	183,071 Direct	-9.51%	Disposed
Feb. 25, 2016	XOMA	A	108,560	—	—	202,320 Direct	+115.78%	Acquired

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
Sept. 19, 2025	XOMA	Performance Stock Units	Common Stock (11,846)	—	May 18, 2026	11,846	Disposed
May 19, 2025	XOMA	Performance Stock Units	Common Stock (17,773)	—	May 18, 2026	17,773	Disposed
Nov. 11, 2024	XOMA	Performance Stock Units	Common Stock (17,773)	—	May 18, 2026	17,773	Disposed
May 18, 2023	XOMA	Performance Stock Units	Common Stock (91,600)	—	—	91,600	Acquired
Nov. 8, 2022	XOMA	Stock Option (right to buy)	Common Stock (11,000)	$18.03	Nov. 8, 2032	11,000	Acquired
July 15, 2022	XOMA	Stock Option (Right to Buy)	Common Stock (2,000)	$4.03	Feb. 10, 2027	2,000	Disposed
March 23, 2022	XOMA	Stock Option (Right to Buy)	Common Stock (161)	$4.03	Feb. 10, 2027	161	Disposed
March 22, 2022	XOMA	Stock Option (Right to Buy)	Common Stock (2,339)	$4.03	Feb. 10, 2027	2,339	Disposed
March 21, 2022	XOMA	Stock Option (Right to Buy)	Common Stock (12,000)	$4.03	Feb. 10, 2027	12,000	Disposed
Feb. 22, 2022	XOMA	Non-Qualified Stock Option (right to buy)	Common Shares (28,000)	$20.22	Feb. 22, 2032	28,000	Acquired
Feb. 17, 2021	XOMA	Non-Qualified Stock Option (right to buy)	Common Shares (20,055)	$38.93	Feb. 17, 2031	20,055	Acquired
Dec. 15, 2020	XOMA	Stock Option (Right to Buy)	Common Stock (15,000)	$4.03	Feb. 10, 2027	15,000	Disposed
Nov. 23, 2020	XOMA	Stock Option (Right to Buy)	Common Stock (5,125)	$4.03	Feb. 10, 2027	5,125	Disposed
Nov. 20, 2020	XOMA	Stock Option (Right to Buy)	Common Stock (6,875)	$4.03	Feb. 10, 2027	6,875	Disposed
Nov. 5, 2020	XOMA	Stock Option (Right to Buy)	Common Stock (8,000)	$4.03	Feb. 10, 2027	8,000	Disposed
March 13, 2020	XOMA	Non-Qualified Stock Option (right to buy)	Common Shares (22,000)	$18.84	March 13, 2030	22,000	Acquired
Sept. 19, 2019	XOMA	Stock Option (right to buy)	Common Stock (4,171)	$4.03	Feb. 10, 2027	4,171	Disposed
Sept. 18, 2019	XOMA	Stock Option (right to buy)	Common Stock (3,829)	$4.03	Feb. 10, 2027	3,829	Disposed
Feb. 13, 2019	XOMA	Non-Qualified Share Option (right to buy)	Common Shares (23,000)	$14.33	Feb. 13, 2029	23,000	Acquired
April 27, 2018	XOMA	Non-Qualified Share Option (right to buy)	Common Shares (2,655)	$5.50	Dec. 22, 2026	2,655	Disposed
April 26, 2018	XOMA	Non-Qualified Share Option (right to buy)	Common Shares (8,345)	$5.50	Dec. 22, 2026	8,345	Disposed
Feb. 14, 2018	XOMA	Non-Qualified Share Option (right to buy)	Common Shares (25,000)	$27.41	Feb. 14, 2028	25,000	Acquired
Nov. 15, 2017	XOMA	Non-Qualified Share Option (right to buy)	Common Shares (8,392)	$4.03	Feb. 10, 2027	8,392	Disposed
Nov. 14, 2017	XOMA	Non-Qualified Share Option (right to buy)	Common Shares (6,847)	$4.03	Feb. 10, 2027	6,847	Disposed
Nov. 13, 2017	XOMA	Non-Qualified Share Option (right to buy)	Common Shares (6,983)	$4.03	Feb. 10, 2027	6,983	Disposed
Feb. 10, 2017	XOMA	Non-Qualified Share Option (right to buy)	Common Shares (100,000)	$4.03	Feb. 10, 2027	100,000	Acquired
Dec. 22, 2016	XOMA	Non-Qualified Share Option (right to buy)	Common Shares (35,000)	$5.50	Dec. 22, 2026	35,000	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 16 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
April 7, 2015	XOMA	Common Shares	93,760	Direct
April 7, 2015	XOMA	Common Shares	6,947	Indirect
April 7, 2015	XOMA	Incentive Share Option (right to buy)→ Common Shares (7,460)	7,460	Direct
April 7, 2015	XOMA	Incentive Share Option (right to buy)→ Common Shares (5,333)	5,333	Direct
April 7, 2015	XOMA	Incentive Share Option (right to buy)→ Common Shares (2,400)	2,400	Direct
April 7, 2015	XOMA	Incentive Share Option (right to buy)→ Common Shares (666)	666	Direct
April 7, 2015	XOMA	Incentive Share Option (right to buy)→ Common Shares (933)	933	Direct
April 7, 2015	XOMA	Incentive Share Option (right to buy)→ Common Shares (1,666)	1,666	Direct
April 7, 2015	XOMA	Incentive Share Option (right to buy)→ Common Shares (800)	800	Direct
April 7, 2015	XOMA	Incentive Share Option (right to buy)→ Common Shares (633)	633	Direct
April 7, 2015	XOMA	Non-Qualified Share Option (right to buy)→ Common Shares (16,000)	16,000	Direct
April 7, 2015	XOMA	Non-Qualified Share Option (right to buy)→ Common Shares (8,700)	8,700	Direct
April 7, 2015	XOMA	Non-Qualified Share Option (right to buy)→ Common Shares (5,000)	5,000	Direct
April 7, 2015	XOMA	Non-Qualified Share Option (right to buy)→ Common Shares (30,740)	30,740	Direct
April 7, 2015	XOMA	Non-Qualified Share Option (right to buy)→ Common Shares (87,000)	87,000	Direct
April 7, 2015	XOMA	Non-Qualified Share Option (right to buy)→ Common Shares (13,050)	13,050	Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

CIK 791908

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2025	$508,185	—	—	—	$201,242	—	$15,500	$724,927
2024	$472,026	—	—	—	$186,923	—	$15,237	$674,186
2023	$453,871	$112,567	$1,509,645	—	$181,549	—	$11,250	$2,268,882

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.