Insider at

04

Insider transactions

05
5 buys (P) 0 sells (S) Net: $4,230 + 72 non-open-market transactions below Avg return of open purchases vs close of 2026-10-23: -28.7% 12 months to the week close of 2026-10-23

Price change vs the latest weekly close (updated to the current quote in your browser when available), split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

72 other filings hidden
DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
March 31, 2026 PCSA P 789 $2.54 $2,004 818 Direct +2720.69% Acquired -28.7% (price as of )
Dec. 16, 2025 AKTX P 2,473 · · 2,473 Direct · Acquired
Dec. 16, 2025 AKTX P 2,473 $0.40 $989 2,473 Direct · Acquired
Dec. 16, 2025 AKTX P 3,093 · · 3,093 Direct · Acquired
Dec. 16, 2025 AKTX P 3,093 $0.40 $1,237 3,093 Direct · Acquired
July 15, 2022 XOMA S 10b5-1 20,883 $29.55 $617,093 15,939 Direct -56.71% Disposed
July 15, 2022 XOMA S 10b5-1 3,212 $31.19 $100,182 12,727 Direct -20.15% Disposed
July 15, 2022 XOMA S 10b5-1 905 $31.86 $28,833 11,822 Direct -7.11% Disposed
March 23, 2022 XOMA S 1,111 $30.02 $33,352 11,822 Direct -8.59% Disposed
March 22, 2022 XOMA S 2,339 $30.02 $70,217 11,822 Direct -16.52% Disposed
March 21, 2022 XOMA S 50,000 $29.00 $1,450,000 11,822 Direct -80.88% Disposed
June 25, 2021 XOMA S 7,170 $33.36 $239,191 13,679 Direct -34.39% Disposed
June 25, 2021 XOMA S 1,171 $34.30 $40,165 12,508 Direct -8.56% Disposed
June 25, 2021 XOMA S 686 $35.13 $24,099 11,822 Direct -5.48% Disposed
Dec. 15, 2020 XOMA S 10b5-1 20,294 $41.15 $835,098 26,555 Direct -43.32% Disposed
Dec. 15, 2020 XOMA S 10b5-1 5,706 $42.04 $239,880 20,849 Direct -21.49% Disposed
Nov. 23, 2020 XOMA S 10b5-1 13,126 $32.96 $432,633 20,849 Direct -38.63% Disposed
Nov. 20, 2020 XOMA S 10b5-1 6,448 $32.46 $209,302 21,275 Direct -23.26% Disposed
Nov. 20, 2020 XOMA S 10b5-1 426 $33.35 $14,207 20,849 Direct -2.00% Disposed
Nov. 5, 2020 XOMA S 10b5-1 9,273 $25.90 $240,171 21,576 Direct -30.06% Disposed
Nov. 5, 2020 XOMA S 10b5-1 727 $27.50 $19,992 20,849 Direct -3.37% Disposed
March 23, 2020 XOMA P 1,000 $14.50 $14,500 20,849 Direct +5.04% Acquired
March 20, 2020 XOMA P 1,000 $16.41 $16,410 19,849 Direct +5.31% Acquired
Nov. 6, 2019 XOMA S 10b5-1 4,348 $22.00 $95,656 17,669 Direct -19.75% Disposed
Sept. 20, 2019 XOMA S 10b5-1 5,452 $20.23 $110,294 17,669 Direct -23.58% Disposed
Sept. 19, 2019 XOMA S 10b5-1 3,728 $20.69 $77,132 20,311 Direct -15.51% Disposed
Sept. 19, 2019 XOMA S 10b5-1 2,642 $21.73 $57,411 17,669 Direct -13.01% Disposed
Sept. 18, 2019 XOMA S 10b5-1 3,830 $21.96 $84,107 17,669 Direct -17.81% Disposed

Loaded 100 of 142 rows

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.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
July 26, 2026 PCSA Restricted Stock Units Common Stock (62,221) $0.00 · 62,221 Acquired
June 26, 2026 PCSA Restricted Stock Common Stock (203) $0.00 · 203 Disposed
Dec. 16, 2025 AKTX Warrants to purchase American Depositary Shares ("ADRs") [F1,F2] American Depositary Shares representing Ordinary Shares (2,473) $0.39 · 2,473 Acquired
Dec. 16, 2025 AKTX Pre-Funded Warrants to purchase ADRs [F1,F2] American Depositary Shares representing Ordinary Shares (2,473) · · 2,473 Acquired
Dec. 16, 2025 AKTX Warrants to purchase ADRs [F1,F5] American Depositary Shares representing Ordinary Shares (3,093) $0.39 · 3,093 Acquired
Dec. 16, 2025 AKTX Pre-Funded Warrants to purchase ADRs [F1,F5] American Depositary Shares representing Ordinary Shares (3,093) · · 3,093 Acquired
Oct. 1, 2025 PCSA Restricted Stock Units Common Stock (100,000) $0.00 · 100,000 Acquired
Oct. 1, 2025 PCSA Stock Options (Right to Buy) Common Stock (300,000) $0.20 · 300,000 Acquired
July 24, 2025 PCSA Restricted Stock Common Stock (175,299) $0.00 · 175,299 Acquired
March 20, 2025 AKTX Stock Option (Right to Buy) American Depositary Shares representing Ordinary Shares [F1] (175,000) $1.50 March 20, 2035 175,000 Acquired
March 20, 2025 AKTX Stock Option (Right to Buy) American Depositary Shares representing Ordinary Shares [F1] (225,000) $1.50 March 20, 2035 225,000 Acquired
March 6, 2025 AKTX Series A Warrants (Right to Buy) American Depositary Shares representing Ordinary Shares [F1] (4,464) $0.87 March 6, 2026 4,464 Acquired
March 6, 2025 AKTX Series B Warrants (Right to Buy) American Depositary Shares representing Ordinary Shares [F1] (4,464) $0.87 March 6, 2030 4,464 Acquired
Sept. 3, 2024 PCSA Restricted Stock Common Stock (31,206) $0.00 · 31,206 Acquired
Sept. 3, 2024 PCSA Restricted Stock Common Stock (31,206) $0.00 · 31,206 Acquired
Feb. 9, 2024 PALI Restricted Stock Units [F3] Common Stock (5,100) · · 5,100 Disposed
Feb. 9, 2024 PALI Restricted Stock Units [F4] Common Stock (5,820) · · 5,820 Disposed
Feb. 9, 2024 PALI Common Stock Options [F6,F7] Common Stock (12,160) $1.60 June 11, 2033 12,160 Disposed
Feb. 9, 2024 PALI Common Stock Options [F6,F7] Common Stock (12,160) $1.60 June 11, 2033 12,160 Acquired
Feb. 9, 2024 PALI Common Stock Options [F6,F8] Common Stock (6,880) $0.59 Nov. 21, 2033 6,880 Disposed
Feb. 9, 2024 PALI Common Stock Options [F6,F8] Common Stock (6,880) $0.59 Nov. 21, 2033 6,880 Acquired
Nov. 21, 2023 PALI Restricted Stock Units [F1,F2,F3] Common Stock (5,820) · · 5,820 Acquired
Nov. 21, 2023 PALI Common Stock Options [F1,F2,F5] Common Stock (6,880) $0.59 Nov. 21, 2033 6,880 Acquired
June 27, 2023 PCSA Restricted Stock Common Stock (14,407) $0.00 · 14,407 Disposed
June 27, 2023 PCSA Restricted Stock Common Stock (101,365) $0.00 · 101,365 Acquired
June 11, 2023 PALI Restricted Stock Units [F1,F3] Common Stock (5,100) · · 5,100 Acquired
June 11, 2023 PALI Common Stock Options [F1,F2,F5] Common Stock (12,160) $1.60 June 11, 2033 12,160 Acquired
July 19, 2022 PCSA Restricted Stock Common Stock (17,797) $0.00 · 17,797 Acquired
July 15, 2022 XOMA Stock Option (Right to Buy) Common Stock (25,000) $4.03 Feb. 10, 2027 25,000 Disposed
March 23, 2022 XOMA Stock Option (Right to Buy) Common Stock (1,111) $4.03 Feb. 10, 2027 1,111 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 (50,000) $4.03 Feb. 10, 2027 50,000 Disposed
Dec. 21, 2021 XOMA Non-Qualified Share Option (right to buy) Common Shares (60,000) $22.56 Dec. 21, 2031 60,000 Acquired
Nov. 18, 2021 PALI Stock Option (right to buy) Common Stock (48,340) $2.32 Nov. 17, 2032 48,340 Acquired
April 27, 2021 PALI Stock Option (Right to Buy) Common Stock (849) $27.59 Nov. 10, 2027 849 Acquired
April 27, 2021 PALI Stock Option (Right to Buy) Common Stock (3,398) $53.33 April 5, 2028 3,398 Acquired
April 27, 2021 PALI Stock Option (Right to Buy) Common Stock (1,359) $53.33 July 24, 2028 1,359 Acquired
April 27, 2021 PALI Stock Option (Right to Buy) Common Stock (5,091) $41.20 April 25, 2029 5,091 Acquired
April 27, 2021 PALI Stock Option (Right to Buy) Common Stock (1,298) $41.20 June 19, 2029 1,298 Acquired
April 27, 2021 PALI Stock Option (Right to Buy) Common Stock (4,406) $26.85 July 10, 2030 4,406 Acquired
Feb. 17, 2021 XOMA Non-Qualified Share Option (right to buy) Common Shares (60,268) $38.93 Feb. 17, 2031 60,268 Acquired
Dec. 15, 2020 XOMA Stock Option (Right to Buy) Common Stock (26,000) $5.50 Dec. 22, 2017 26,000 Disposed
Nov. 23, 2020 XOMA Stock Option (Right to Buy) Common Stock (13,126) $5.50 Dec. 22, 2026 13,126 Disposed
Nov. 20, 2020 XOMA Stock Option (Right to Buy) Common Stock (6,874) $5.50 Dec. 22, 2026 6,874 Disposed
Nov. 5, 2020 XOMA Stock Option (Right to Buy) Common Stock (10,000) $5.50 Dec. 22, 2026 10,000 Disposed
March 13, 2020 XOMA Non Qualified Stock Option (right to buy) Common Shares (66,200) $18.84 March 13, 2030 66,200 Acquired
Dec. 23, 2019 XOMA Subscription Rights (right to buy) Common Stock (1,180) $22.00 Dec. 18, 2019 1,180 Disposed
Nov. 6, 2019 XOMA Stock Option (Right to Buy) Common Stock (4,348) $5.50 Dec. 22, 2026 4,348 Disposed
Sept. 20, 2019 XOMA Stock Option (right to buy) Common Stock (5,452) $5.50 Dec. 22, 2026 5,452 Disposed
Sept. 19, 2019 XOMA Stock Option (right to buy) Common Stock (6,370) $5.50 Dec. 22, 2026 6,370 Disposed
Sept. 18, 2019 XOMA Stock Option (right to buy) Common Stock (3,830) $5.50 Dec. 22, 2026 3,830 Disposed
Feb. 13, 2019 XOMA Non-Qualified Share Option (right to buy) Common Shares (60,000) $14.33 Feb. 13, 2029 60,000 Acquired
Dec. 20, 2018 XOMA Subscription Rights (right to buy) Common Shares (678) $13.00 Dec. 14, 2018 678 Disposed
April 27, 2018 XOMA Non-Qualified Share Option (right to buy) Common Shares (15,655) $5.50 Dec. 22, 2026 15,655 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 (30,000) $27.41 Feb. 14, 2028 30,000 Acquired
Nov. 15, 2017 XOMA Non-Qualified Share Option (right to buy) Common Shares (26,145) $4.03 Feb. 10, 2027 26,145 Disposed
Nov. 14, 2017 XOMA Non-Qualified Share Option (right to buy) Common Shares (8,583) $4.03 Feb. 10, 2027 8,583 Disposed
Nov. 13, 2017 XOMA Non-Qualified Share Option (right to buy) Common Shares (11,568) $4.03 Feb. 10, 2027 11,568 Disposed
Feb. 10, 2017 XOMA Non-Qualified Share Option (right to buy) Common Shares (312,500) $4.03 Feb. 10, 2027 312,500 Acquired
Dec. 22, 2016 XOMA Non-Qualified Share Option (right to buy) Common Shares (100,000) $5.50 Dec. 22, 2026 100,000 Acquired
Feb. 26, 2015 XOMA Non-Qualified Share Option (right to buy) Common Shares (72,500) $3.83 Feb. 26, 2025 72,500 Acquired

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

Initial ownership (Form 3) 13 holdings

07

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

DateTickerSecuritySharesOwnership
Nov. 22, 2024 AKTX Ordinary Shares, par value $0.0001 per share [F1] 22,216,000 Direct
Nov. 22, 2024 AKTX Warrants (Right to Buy)→ Ordinary Shares, par value $0.0001 per share [F1] (19,570,000) 19,570,000 Direct
Nov. 22, 2024 AKTX Stock Option (Right to Buy)→ Ordinary Shares, par value $0.0001 per share [F1] (293,500,000) 293,500,000 Direct
March 3, 2014 XOMA Common Shares 154,112 Direct
March 3, 2014 XOMA Common Shares 1,470 Indirect
March 3, 2014 XOMA Incentive Share Option (right to buy)→ Common Shares (1,041) 1,041 Direct
March 3, 2014 XOMA Incentive Share Option (right to buy)→ Common Shares (37,296) 37,296 Direct
March 3, 2014 XOMA Non-Qualified Share Option (right to buy)→ Common Shares (9,758) 9,758 Direct
March 3, 2014 XOMA Non-Qualified Share Option (right to buy)→ Common Shares (23,563) 23,563 Direct
March 3, 2014 XOMA Non-Qualified Share Option (right to buy)→ Common Shares (45,751) 45,751 Direct
March 3, 2014 XOMA Non-Qualified Share Option (right to buy)→ Common Shares (15,625) 15,625 Direct
March 3, 2014 XOMA Non-Qualified Share Option (right to buy)→ Common Shares (45,000) 45,000 Direct
March 3, 2014 XOMA Non-Qualified Share Option (right to buy)→ Common Shares (16,037) 16,037 Direct

Holdings reported on Form 4 42 reported holdings

08

Positions listed on each Form 4 without a transaction in that filing (Table I and II holdings), newest filing first.

DateTickerSecuritySharesExercise priceExpirationOwnership
July 28, 2026 PCSA Common Stock 1,021 · · Direct
July 28, 2026 PCSA Stock Options (Right to Buy)→ Common Stock (12,000) 12,000 $4.96 · Direct
March 24, 2025 AKTX American Depositary Shares representing Ordinary Shares [F1] 36,271 · · Direct
July 18, 2022 XOMA Common Stock 5,560 · · Indirect
July 18, 2022 XOMA Depositary Shares - 8.375% B Cumulative Stock 8,000 · · Indirect
July 18, 2022 XOMA 8.625% Series A Cumulative Perpetual Preferred Stock 8,000 · · Indirect
March 23, 2022 XOMA Common Stock 5,560 · · Indirect
March 23, 2022 XOMA Depositary Shares - 8.375% B Cumulative Stock 8,000 · · Indirect
March 23, 2022 XOMA 8.625% Series A Cumulative Perpetual Preferred Stock 8,000 · · Indirect
June 29, 2021 XOMA 8.625% Series A Cumulative Perpetual Preferred Stock 8,000 · · Indirect
June 29, 2021 XOMA Depositary Shares - 8.375% B Cumulative Stock 8,000 · · Indirect
June 29, 2021 XOMA Common Stock 4,966 · · Indirect
April 13, 2021 XOMA Common Stock 20,849 · · Direct
April 13, 2021 XOMA Common Stock 4,966 · · Indirect
April 13, 2021 XOMA 8.625% Series A Cumulative Perpetual Preferred Stock 8,000 · · Indirect
Dec. 17, 2020 XOMA Common Stock 4,673 · · Indirect
Nov. 24, 2020 XOMA Common Stock 4,673 · · Indirect
Nov. 6, 2020 XOMA Common Stock 4,673 · · Indirect
March 24, 2020 XOMA Common Shares 4,673 · · Indirect
March 23, 2020 XOMA Common Shares 4,673 · · Indirect
Jan. 16, 2020 XOMA Common Shares 4,673 · · Indirect
Nov. 8, 2019 XOMA Common Stock 4,202 · · Indirect
Sept. 20, 2019 XOMA Common Stock 4,202 · · Indirect
Dec. 21, 2018 XOMA Common Shares 2,961 · · Indirect
Nov. 15, 2018 XOMA Common Shares 2,961 · · Indirect
April 27, 2018 XOMA Common Shares 2,961 · · Indirect
Nov. 15, 2017 XOMA Common Shares 2,961 · · Indirect
March 23, 2017 XOMA Common Shares 2,961 · · Indirect
Feb. 1, 2017 XOMA Common Shares 659 · · Indirect
Jan. 10, 2017 XOMA Common Shares 659 · · Indirect
Nov. 3, 2016 XOMA Common Shares 659 · · Indirect
Oct. 11, 2016 XOMA Common Shares 13,192 · · Indirect
March 22, 2016 XOMA Common Shares 13,192 · · Indirect
Feb. 29, 2016 XOMA Common Shares 13,192 · · Indirect
Aug. 18, 2015 XOMA Common Shares 4,471 · · Indirect
March 20, 2015 XOMA Common Shares 4,471 · · Indirect
March 2, 2015 XOMA Common Shares 4,471 · · Indirect
Dec. 1, 2014 XOMA Common Shares 1,470 · · Indirect
Nov. 24, 2014 XOMA Common Shares 1,470 · · Indirect
Nov. 17, 2014 XOMA Common Shares 1,470 · · Indirect
Aug. 18, 2014 XOMA Common Shares 1,470 · · Indirect
March 20, 2014 XOMA Common Shares 1,470 · · Indirect

Annual statements (Form 5) Transactions and holdings reported once a year on SEC Form 5 — exempt or late-reported trades, gifts and small acquisitions.

09

Transactions (9)

DateTickerSecurityCodeShares PriceValueOwned afterExercise priceExpirationA/D
Dec. 31, 2015 XOMA Common Shares J 8,721 $1.38 $12,035 13,192 Indirect · · Acquired
Nov. 30, 2015 XOMA Common Shares J 4,318 $1.13 $4,879 182,198 Direct · · Acquired
June 30, 2015 XOMA Common Shares J 703 $3.69 $2,594 186,947 Direct · · Acquired
March 31, 2015 XOMA Common Shares J 1,775 $3.46 $6,142 186,244 Direct · · Acquired
Dec. 31, 2014 XOMA Common Shares J 758 $3.41 $2,585 140,988 Direct · · Acquired
Dec. 31, 2014 XOMA Common Shares J 3,001 $3.83 $11,494 4,471 Indirect · · Acquired
Sept. 30, 2014 XOMA Common Shares J 647 $4.00 $2,588 147,327 Direct · · Acquired
June 30, 2014 XOMA Common Shares J 594 $4.36 $2,590 153,264 Direct · · Acquired
March 31, 2014 XOMA Common Shares J 1,229 $4.95 $6,084 152,670 Direct · · Acquired

Compensation (DEF 14A)

10

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

CIK 791908

Fiscal yearSalaryBonusStock awards Option awardsNon-equity incentivePension changeOtherTotal
2022 $725,000 · · · $435,000 · $1,184,168 $2,344,168
2021 $593,166 · · · $260,993 · $23,394 $3,510,795
2020 $533,527 · · · $187,802 · $21,232 $1,693,762

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