investing-statsSEC Form 4 insider transactions

XOMA

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Open-market insider flow over 30d · 90d · 180d · 365d · filter in table · CSV · JSON

No open-market insider trades stored for XOMA in the last 90 days. The full filing history below may still show grants, exercises, or older activity.

Recent filings

How to read this

Filed
Date the Form 4 was filed with the SEC. Insiders must file within 2 business days of the trade.
Ticker
The issuer's stock symbol. Select it to open that company's insider-activity page.
Issuer
The company whose shares were traded.
Sector
The issuer's industry (SEC SIC classification). Select a value to filter to that sector.
Insider
The reporting person: an officer, director, or 10% owner. Select a name to see all of their trades.
Role
The insider's relationship to the company: director, officer, or 10% owner.
Code
SEC transaction code describing the kind of transaction. Full official definitions are under “Transaction codes” below. A dot marks an open-market trade (P/S), the highest-conviction signal.
Side
Direction of the trade, from the filing's Acquired (A) ▲ / Disposed of (D) ▼ field: a buy or a sell.
10b5-1
Trade made under a pre-arranged Rule 10b5-1 plan: scheduled in advance, not a discretionary decision (generally lower signal).
Shares
Number of shares in this transaction.
Price
Reported price per share. Blank for grants, gifts, and other trades with no stated price.
Value
Transaction value = shares × price. Left blank for grants, option exercises, gifts, and conversions, which have no cash price (see Own Δ for their impact).
Owned after
Form 4 column “Amount of Securities Beneficially Owned Following Reported Transaction(s)”: shares the insider held (directly or indirectly) immediately after this trade.
Own Δ
How much this trade changed the insider's own holding versus what they held just before it (not a share of the company). +45% grew it by 45%, 2.0× more than doubled it, −100% sold the entire stake, “new” built a position from nothing.
Co. Δ
Change in the insider's stake as a share of the whole company from this trade (transaction shares ÷ shares outstanding). The “(now …)” figure is their resulting total stake. Based on the latest reported shares outstanding; blank when unavailable.
D/I
Form 4 column “Ownership Form: Direct (D) or Indirect (I)”. Indirect holdings (for example, through a trust, fund, or family member) are detailed in the filing's “Nature of Indirect Beneficial Ownership.”
Lag
Days from the trade date to the filing date (Form 4 is due within 2 business days).

Transaction codes

Verbatim from the SEC's General Instructions for Forms 3, 4 and 5.

P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award or other acquisition pursuant to Rule 16b-3(d)
D
Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e)
F
Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3
M
Exercise or conversion of derivative security exempted pursuant to Rule 16b-3
G
Bona fide gift
C
Conversion of derivative security
X
Exercise of in-the-money or at-the-money derivative security
J
Other acquisition or disposition (describe transaction)
Recent Form 4 filings for XOMA
FiledDate the Form 4 was filed with the SEC (due within 2 business days of the trade).InsiderRoleCodeSEC transaction code describing the kind of transaction. See “How to read this” above for the official SEC definition of each code. The dot marks an open-market trade (P/S).SideDirection of the trade: a buy (acquired ▲) or a sell (disposed ▼).SharesNumber of shares in this transaction.PriceReported price per share. Blank for trades with no stated price.ValueTransaction value = shares × price. Left blank for grants, option exercises, gifts, and conversions, which have no cash price (see Own Δ).Owned afterShares the insider held (directly or indirectly) immediately after this trade.Own ΔHow much this trade changed the insider's own holding versus what they held just before it (not a share of the company). +45% grew it by 45%, 2.0× more than doubled it, −100% sold the entire stake, “new” built a position from nothing.Co. ΔChange in the insider's stake as a share of the whole company from this trade (transaction shares ÷ shares outstanding). The “(now …)” figure is their resulting total stake in the company. Based on the latest reported shares outstanding; blank when unavailable.Link to SEC filing
2026-07-16BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesU sell772,00000−100%−6.2% (now 0%)filing
2026-07-16BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesU sell412,00000−100%−3.3% (now 0%)filing
2026-07-16BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesU sell2,773,54500−100%−22% (now 0%)filing
2026-07-16BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesU sell3,635,75800−100%−29% (now 0%)filing
2026-07-14Montano Maricel PereaOfficer (Chief Legal Officer)D sell11,316 11,316 Common Stock0filing
2026-07-14Montano Maricel PereaOfficer (Chief Legal Officer)D sell37,074 37,074 Common Stock0filing
2026-07-14Montano Maricel PereaOfficer (Chief Legal Officer)J sell6500−100%−<0.01% (now 0%)filing
2026-07-14Montano Maricel PereaOfficer (Chief Legal Officer)J sell42,30600−100%−0.34% (now 0%)filing
2026-07-14LIMBER JOSEPH MDirectorD sell9,936 9,936 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell9,763 9,763 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell10,967 10,967 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell8,996 8,996 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell5,101 5,101 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell6,152 6,152 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell8,167 8,167 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell5,052 5,052 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell2,366 2,366 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell8,000 8,000 Common Stock0filing
2026-07-14LIMBER JOSEPH MDirectorD sell20,00000−100%−0.16% (now 0%)filing
2026-07-14LIMBER JOSEPH MDirectorD sell10,00000−100%−0.08% (now 0%)filing
2026-07-14LIMBER JOSEPH MDirectorJ sell9,53200−100%−0.08% (now 0%)filing
2026-07-14Kosacz BarbaraDirectorD sell9,763 9,763 Common Stock0filing
2026-07-14Kosacz BarbaraDirectorD sell10,967 10,967 Common Stock0filing
2026-07-14Kosacz BarbaraDirectorD sell8,996 8,996 Common Stock0filing
2026-07-14Kosacz BarbaraDirectorD sell5,101 5,101 Common Stock0filing
2026-07-14Kosacz BarbaraDirectorD sell6,152 6,152 Common Stock0filing
2026-07-14Kosacz BarbaraDirectorD sell8,167 8,167 Common Stock0filing
2026-07-14Kosacz BarbaraDirectorD sell19,979 19,979 Common Stock0filing
2026-07-14Kosacz BarbaraDirectorJ sell6,26900−100%−0.05% (now 0%)filing
2026-07-14WYSZOMIERSKI JACK LDirectorD sell10,967 10,967 Common Stock0filing
2026-07-14WYSZOMIERSKI JACK LDirectorD sell8,996 8,996 Common Stock0filing
2026-07-14WYSZOMIERSKI JACK LDirectorD sell5,101 5,101 Common Stock0filing
2026-07-14WYSZOMIERSKI JACK LDirectorD sell6,152 6,152 Common Stock0filing
2026-07-14WYSZOMIERSKI JACK LDirectorD sell8,167 8,167 Common Stock0filing
2026-07-14WYSZOMIERSKI JACK LDirectorD sell5,052 5,052 Common Stock0filing
2026-07-14WYSZOMIERSKI JACK LDirectorD sell2,366 2,366 Common Stock0filing
2026-07-14WYSZOMIERSKI JACK LDirectorD sell8,000 8,000 Common Stock0filing
2026-07-14WYSZOMIERSKI JACK LDirectorJ sell21,82800−100%−0.17% (now 0%)filing
2026-07-14Hughes OwenDirector, Officer (Chief Executive Officer)D sell132,714 132,714 Common Stock0filing
2026-07-14Hughes OwenDirector, Officer (Chief Executive Officer)D sell116,245 116,245 Common Stock0filing
2026-07-14Hughes OwenDirector, Officer (Chief Executive Officer)D sell75,000 75,000 Common Stock0filing
2026-07-14Hughes OwenDirector, Officer (Chief Executive Officer)D sell100,000 100,000 Common Stock0filing
2026-07-14Hughes OwenDirector, Officer (Chief Executive Officer)D sell102,00000−100%−0.81% (now 0%)filing
2026-07-14Hughes OwenDirector, Officer (Chief Executive Officer)J sell75200−100%−<0.01% (now 0%)filing
2026-07-14Hughes OwenDirector, Officer (Chief Executive Officer)J sell191,26400−100%−1.5% (now 0%)filing
2026-07-14Hernday NatashaDirectorD sell4,881 4,881 Common Stock0filing
2026-07-14Hernday NatashaDirectorD sell10,967 10,967 Common Stock0filing
2026-07-14Hernday NatashaDirectorD sell8,996 8,996 Common Stock0filing
2026-07-14Hernday NatashaDirectorD sell5,101 5,101 Common Stock0filing
2026-07-14Hernday NatashaDirectorD sell13,251 13,251 Common Stock0filing
2026-07-14Hernday NatashaDirectorD sell4,00000−100%−0.03% (now 0%)filing
2026-07-14Hernday NatashaDirectorJ sell9,30400−100%−0.07% (now 0%)filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)D sell23,488 23,488 Common Stock0filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)D sell41,112 41,112 Common Stock0filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)D sell250,000 250,000 Common Stock0filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)D sell300,000 300,000 Common Stock0filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)D sell2,00000−100%−0.02% (now 0%)filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)D sell8200−100%−<0.01% (now 0%)filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)J sell1,50000−100%−0.01% (now 0%)filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)J sell7500−100%−<0.01% (now 0%)filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)J sell7500−100%−<0.01% (now 0%)filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)J sell1,28700−100%−0.01% (now 0%)filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)D sell7,04500−100%−0.06% (now 0%)filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)D sell31300−100%−<0.01% (now 0%)filing
2026-07-14Sitko BradleyOfficer (Chief Investment Officer)J sell83,76500−100%−0.67% (now 0%)filing
2026-07-14PERRY MATTHEW DDirectorD sell10,967 10,967 Common Stock0filing
2026-07-14PERRY MATTHEW DDirectorD sell8,996 8,996 Common Stock0filing
2026-07-14PERRY MATTHEW DDirectorD sell5,101 5,101 Common Stock0filing
2026-07-14PERRY MATTHEW DDirectorD sell6,152 6,152 Common Stock0filing
2026-07-14PERRY MATTHEW DDirectorD sell8,167 8,167 Common Stock0filing
2026-07-14PERRY MATTHEW DDirectorD sell5,052 5,052 Common Stock0filing
2026-07-14PERRY MATTHEW DDirectorD sell15,222 15,222 Common Stock0filing
2026-07-14PERRY MATTHEW DDirectorJ sell24,13800−100%−0.19% (now 0%)filing
2026-07-14Trigilio JeffreyOfficer (Chief Financial Officer)D sell26,000 26,000 Common Stock0filing
2026-07-14Trigilio JeffreyOfficer (Chief Financial Officer)D sell126,924 126,924 Common Stock0filing
2026-07-14Trigilio JeffreyOfficer (Chief Financial Officer)J sell103,90600−100%−0.83% (now 0%)filing
2026-07-14Franklin Heather LDirectorD sell9,763 9,763 Common Stock0filing
2026-07-14Franklin Heather LDirectorD sell10,967 10,967 Common Stock0filing
2026-07-14Franklin Heather LDirectorD sell8,996 8,996 Common Stock0filing
2026-07-14Franklin Heather LDirectorD sell17,282 17,282 Common Stock0filing
2026-07-14Franklin Heather LDirectorJ sell6,26900−100%−0.05% (now 0%)filing
2026-05-26WYSZOMIERSKI JACK LDirectorA buy3,586025,116+17%+0.03% (now 0.20%)filing
2026-05-26PERRY MATTHEW DDirectorA buy3,586027,426+15%+0.03% (now 0.22%)filing
2026-05-26LIMBER JOSEPH MDirectorA buy3,586012,820+39%+0.03% (now 0.10%)filing
2026-05-26Kosacz BarbaraDirectorA buy3,58609,557+60%+0.03% (now 0.08%)filing
2026-05-26Hernday NatashaDirectorA buy3,586012,592+40%+0.03% (now 0.10%)filing
2026-05-26Franklin Heather LDirectorA buy3,58609,557+60%+0.03% (now 0.08%)filing
2026-05-18BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesC sell772 772,000 Common Stock, $0.0075 par value per share0filing
2026-05-18BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesC sell412 412,000 Common Stock, $0.0075 par value per share0filing
2026-05-18BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesC sell1,506 1,506,000 Common Stock, $0.0075 par value per share0filing
2026-05-18BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesC sell2,313 2,313,000 Common Stock, $0.0075 par value per share0filing
2026-05-18BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesC buy772,0000$4.03$3.11M772,000new+6.2% (now 6.2%)filing
2026-05-18BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesC buy412,0000$4.03$1.66M412,000new+3.3% (now 3.3%)filing
2026-05-18BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesC buy1,506,0000$4.03$6.07M2,773,5452.2×+12% (now 22%)filing
2026-05-18BVF PARTNERS L P/IL +9 more10% owner, See Explanation of ResponsesC buy2,313,0000$4.03$9.32M3,635,7582.7×+18% (now 29%)filing
2026-04-22Trigilio JeffreyOfficer (Chief Financial Officer)M sell11,538 11,538 Common Stock126,924filing
2026-04-22Trigilio JeffreyOfficer (Chief Financial Officer)M buy11,5380103,906+12%+0.09% (now 0.83%)filing
2026-04-22Sitko BradleyOfficer (Chief Investment Officer)M sell3,737 3,737 Common Stock41,112filing
2026-04-22Sitko BradleyOfficer (Chief Investment Officer)M buy3,737082,961+5%+0.03% (now 0.66%)filing
2026-04-22Montano Maricel PereaOfficer (Chief Legal Officer)M sell3,370 3,370 Common Stock37,074filing
2026-04-22Montano Maricel PereaOfficer (Chief Legal Officer)M buy3,370041,793+9%+0.03% (now 0.33%)filing
2026-04-22Hughes OwenDirector, Officer (Chief Executive Officer)M sell10,568 10,568 Common Stock116,245filing
2026-04-22Hughes OwenDirector, Officer (Chief Executive Officer)M buy10,5680191,264+6%+0.08% (now 1.5%)filing
2026-04-15Trigilio JeffreyOfficer (Chief Financial Officer)M sell4,000 4,000 Common Stock26,000filing
2026-04-15Trigilio JeffreyOfficer (Chief Financial Officer)F sell1,6320$36.76$60.0K92,368−2%−0.01% (now 0.74%)filing
2026-04-15Trigilio JeffreyOfficer (Chief Financial Officer)M buy4,000094,000+4%+0.03% (now 0.75%)filing
2026-03-31LIMBER JOSEPH MDirectorM sell3,026 3,026 Common Stock0filing
2026-03-31LIMBER JOSEPH MDirectorM buy3,0260$11.20$33.9K9,234+49%+0.02% (now 0.07%)filing
2026-03-26WYSZOMIERSKI JACK LDirectorM sell3,026 3,026 Common Stock0filing
2026-03-26WYSZOMIERSKI JACK LDirectorM buy3,0260$11.20$33.9K21,530+16%+0.02% (now 0.17%)filing

Up to 200 most recent filings · select a heading to sort, or open “How to read this” above for definitions · this company on SEC EDGAR.