WYSZOMIERSKI JACK L

Director · XOMA, EXEL, SITE

As of 2026-09-16, WYSZOMIERSKI JACK L has 26 Form 4 transactions on record across 3 companies — 19 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Pattern in the record: open-market sales filed in June in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.

Reconstructed holdings

Direct: $17.8MIndirect: $0$17.8Mas of 2026-09-16
  • Direct $17.8M
  • Indirect $0
EXELdirect284,384 sh$16.1M
SITEdirect19,120 sh$1.7M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

XOMA · 14 trades
2026-07-14: Disposition, 8,000 sh ($0)2026-07-14: Disposition, 5,052 sh ($0)2026-07-14: Disposition, 2,366 sh ($0)2026-07-14: Disposition, 10,967 sh ($0)2026-07-14: Disposition, 8,996 sh ($0)2026-07-14: Disposition, 5,101 sh ($0)2026-07-14: Disposition, 6,152 sh ($0)2026-07-14: Disposition, 8,167 sh ($0)2026-07-14: Other acquisition, 21,828 sh2026-07-14: Other acquisition, 21,828 sh2026-05-21: Award / grant, 3,586 sh ($0)2026-03-24: Option exercise, 3,026 sh ($34K)2026-03-24: Option exercise, 3,026 sh ($0)2025-05-21: Award / grant, 5,971 sh ($0)
EXEL · 10 trades
2026-06-01: Sale, 3,925 sh ($198K)2026-05-27: Award / grant, 8,367 sh ($0)2026-02-18: Sale, 99,574 sh ($4.4M)2026-02-18: Option exercise, 20,634 sh ($408K)2026-02-18: Option exercise, 20,634 sh ($0)2025-06-03: Sale, 7,535 sh ($325K)2025-05-29: Award / grant, 9,812 sh ($0)2025-02-28: Sale, 8,768 sh ($331K)2025-02-28: Option exercise, 15,874 sh ($325K)2025-02-28: Option exercise, 15,874 sh ($0)
SITE · 2 trades
2026-05-13: Award / grant, 1,186 sh ($0)2025-05-14: Award / grant, 1,125 sh ($0)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-06-01EXELSale3,925 @ $50.55$198K−1.4% of holding284,384Form 4
2026-02-18EXELSale99,574 @ $44.01$4.4M−26.2% of holding279,942Form 4
2025-06-03EXELSale7,535 @ $43.09$325K−2.1% of holding358,882Form 4
2025-02-28EXELSale8,768 @ $37.80$331K−2.4% of holding356,605Form 4
22 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-07-14XOMADisposition8,0000Form 4
2026-07-14XOMADisposition5,0520Form 4
2026-07-14XOMADisposition2,3660Form 4
2026-07-14XOMADisposition10,9670Form 4
2026-07-14XOMADisposition8,9960Form 4
2026-07-14XOMADisposition5,1010Form 4
2026-07-14XOMADisposition6,1520Form 4
2026-07-14XOMADisposition8,1670Form 4
2026-07-14XOMAOther acquisition21,8280Form 4
2026-07-14XOMAOther acquisition21,8280Form 4
2026-05-27EXELAward / grant8,367288,309Form 4
2026-05-21XOMAAward / grant3,58625,116Form 4
2026-05-13SITEAward / grant1,18619,120Form 4
2026-03-24XOMAOption exercise3,02621,530Form 4
2026-03-24XOMAOption exercise3,0260Form 4
2026-02-18EXELOption exercise20,634379,516Form 4
2026-02-18EXELOption exercise20,6340Form 4
2025-05-29EXELAward / grant9,812366,417Form 4
2025-05-21XOMAAward / grant5,97118,504Form 4
2025-05-14SITEAward / grant1,12517,934Form 4
2025-02-28EXELOption exercise15,874365,373Form 4
2025-02-28EXELOption exercise15,8740Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.