XOMA
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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)
| Filed ↓Date the Form 4 was filed with the SEC (due within 2 business days of the trade). | Insider | Role | CodeSEC 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 ▼). | Shares | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-07-16 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | U | ▼ sell | 772,0000 | — | — | 0 | −100% | −6.2% (now 0%) | filing |
| 2026-07-16 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | U | ▼ sell | 412,0000 | — | — | 0 | −100% | −3.3% (now 0%) | filing |
| 2026-07-16 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | U | ▼ sell | 2,773,5450 | — | — | 0 | −100% | −22% (now 0%) | filing |
| 2026-07-16 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | U | ▼ sell | 3,635,7580 | — | — | 0 | −100% | −29% (now 0%) | filing |
| 2026-07-14 | Montano Maricel Perea | Officer (Chief Legal Officer) | D | ▼ sell | 11,316→ 11,316 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Montano Maricel Perea | Officer (Chief Legal Officer) | D | ▼ sell | 37,074→ 37,074 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Montano Maricel Perea | Officer (Chief Legal Officer) | J | ▼ sell | 650 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-07-14 | Montano Maricel Perea | Officer (Chief Legal Officer) | J | ▼ sell | 42,3060 | — | — | 0 | −100% | −0.34% (now 0%) | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 9,936→ 9,936 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 9,763→ 9,763 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 10,967→ 10,967 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 8,996→ 8,996 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 5,101→ 5,101 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 6,152→ 6,152 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 8,167→ 8,167 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 5,052→ 5,052 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 2,366→ 2,366 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 8,000→ 8,000 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 20,0000 | — | — | 0 | −100% | −0.16% (now 0%) | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | D | ▼ sell | 10,0000 | — | — | 0 | −100% | −0.08% (now 0%) | filing |
| 2026-07-14 | LIMBER JOSEPH M | Director | J | ▼ sell | 9,5320 | — | — | 0 | −100% | −0.08% (now 0%) | filing |
| 2026-07-14 | Kosacz Barbara | Director | D | ▼ sell | 9,763→ 9,763 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Kosacz Barbara | Director | D | ▼ sell | 10,967→ 10,967 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Kosacz Barbara | Director | D | ▼ sell | 8,996→ 8,996 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Kosacz Barbara | Director | D | ▼ sell | 5,101→ 5,101 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Kosacz Barbara | Director | D | ▼ sell | 6,152→ 6,152 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Kosacz Barbara | Director | D | ▼ sell | 8,167→ 8,167 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Kosacz Barbara | Director | D | ▼ sell | 19,979→ 19,979 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Kosacz Barbara | Director | J | ▼ sell | 6,2690 | — | — | 0 | −100% | −0.05% (now 0%) | filing |
| 2026-07-14 | WYSZOMIERSKI JACK L | Director | D | ▼ sell | 10,967→ 10,967 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | WYSZOMIERSKI JACK L | Director | D | ▼ sell | 8,996→ 8,996 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | WYSZOMIERSKI JACK L | Director | D | ▼ sell | 5,101→ 5,101 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | WYSZOMIERSKI JACK L | Director | D | ▼ sell | 6,152→ 6,152 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | WYSZOMIERSKI JACK L | Director | D | ▼ sell | 8,167→ 8,167 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | WYSZOMIERSKI JACK L | Director | D | ▼ sell | 5,052→ 5,052 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | WYSZOMIERSKI JACK L | Director | D | ▼ sell | 2,366→ 2,366 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | WYSZOMIERSKI JACK L | Director | D | ▼ sell | 8,000→ 8,000 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | WYSZOMIERSKI JACK L | Director | J | ▼ sell | 21,8280 | — | — | 0 | −100% | −0.17% (now 0%) | filing |
| 2026-07-14 | Hughes Owen | Director, Officer (Chief Executive Officer) | D | ▼ sell | 132,714→ 132,714 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Hughes Owen | Director, Officer (Chief Executive Officer) | D | ▼ sell | 116,245→ 116,245 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Hughes Owen | Director, Officer (Chief Executive Officer) | D | ▼ sell | 75,000→ 75,000 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Hughes Owen | Director, Officer (Chief Executive Officer) | D | ▼ sell | 100,000→ 100,000 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Hughes Owen | Director, Officer (Chief Executive Officer) | D | ▼ sell | 102,0000 | — | — | 0 | −100% | −0.81% (now 0%) | filing |
| 2026-07-14 | Hughes Owen | Director, Officer (Chief Executive Officer) | J | ▼ sell | 7520 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-07-14 | Hughes Owen | Director, Officer (Chief Executive Officer) | J | ▼ sell | 191,2640 | — | — | 0 | −100% | −1.5% (now 0%) | filing |
| 2026-07-14 | Hernday Natasha | Director | D | ▼ sell | 4,881→ 4,881 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Hernday Natasha | Director | D | ▼ sell | 10,967→ 10,967 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Hernday Natasha | Director | D | ▼ sell | 8,996→ 8,996 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Hernday Natasha | Director | D | ▼ sell | 5,101→ 5,101 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Hernday Natasha | Director | D | ▼ sell | 13,251→ 13,251 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Hernday Natasha | Director | D | ▼ sell | 4,0000 | — | — | 0 | −100% | −0.03% (now 0%) | filing |
| 2026-07-14 | Hernday Natasha | Director | J | ▼ sell | 9,3040 | — | — | 0 | −100% | −0.07% (now 0%) | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | D | ▼ sell | 23,488→ 23,488 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | D | ▼ sell | 41,112→ 41,112 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | D | ▼ sell | 250,000→ 250,000 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | D | ▼ sell | 300,000→ 300,000 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | D | ▼ sell | 2,0000 | — | — | 0 | −100% | −0.02% (now 0%) | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | D | ▼ sell | 820 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | J | ▼ sell | 1,5000 | — | — | 0 | −100% | −0.01% (now 0%) | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | J | ▼ sell | 750 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | J | ▼ sell | 750 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | J | ▼ sell | 1,2870 | — | — | 0 | −100% | −0.01% (now 0%) | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | D | ▼ sell | 7,0450 | — | — | 0 | −100% | −0.06% (now 0%) | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | D | ▼ sell | 3130 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-07-14 | Sitko Bradley | Officer (Chief Investment Officer) | J | ▼ sell | 83,7650 | — | — | 0 | −100% | −0.67% (now 0%) | filing |
| 2026-07-14 | PERRY MATTHEW D | Director | D | ▼ sell | 10,967→ 10,967 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | PERRY MATTHEW D | Director | D | ▼ sell | 8,996→ 8,996 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | PERRY MATTHEW D | Director | D | ▼ sell | 5,101→ 5,101 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | PERRY MATTHEW D | Director | D | ▼ sell | 6,152→ 6,152 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | PERRY MATTHEW D | Director | D | ▼ sell | 8,167→ 8,167 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | PERRY MATTHEW D | Director | D | ▼ sell | 5,052→ 5,052 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | PERRY MATTHEW D | Director | D | ▼ sell | 15,222→ 15,222 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | PERRY MATTHEW D | Director | J | ▼ sell | 24,1380 | — | — | 0 | −100% | −0.19% (now 0%) | filing |
| 2026-07-14 | Trigilio Jeffrey | Officer (Chief Financial Officer) | D | ▼ sell | 26,000→ 26,000 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Trigilio Jeffrey | Officer (Chief Financial Officer) | D | ▼ sell | 126,924→ 126,924 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Trigilio Jeffrey | Officer (Chief Financial Officer) | J | ▼ sell | 103,9060 | — | — | 0 | −100% | −0.83% (now 0%) | filing |
| 2026-07-14 | Franklin Heather L | Director | D | ▼ sell | 9,763→ 9,763 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Franklin Heather L | Director | D | ▼ sell | 10,967→ 10,967 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Franklin Heather L | Director | D | ▼ sell | 8,996→ 8,996 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Franklin Heather L | Director | D | ▼ sell | 17,282→ 17,282 Common Stock | — | — | 0 | — | — | filing |
| 2026-07-14 | Franklin Heather L | Director | J | ▼ sell | 6,2690 | — | — | 0 | −100% | −0.05% (now 0%) | filing |
| 2026-05-26 | WYSZOMIERSKI JACK L | Director | A | ▲ buy | 3,5860 | — | — | 25,116 | +17% | +0.03% (now 0.20%) | filing |
| 2026-05-26 | PERRY MATTHEW D | Director | A | ▲ buy | 3,5860 | — | — | 27,426 | +15% | +0.03% (now 0.22%) | filing |
| 2026-05-26 | LIMBER JOSEPH M | Director | A | ▲ buy | 3,5860 | — | — | 12,820 | +39% | +0.03% (now 0.10%) | filing |
| 2026-05-26 | Kosacz Barbara | Director | A | ▲ buy | 3,5860 | — | — | 9,557 | +60% | +0.03% (now 0.08%) | filing |
| 2026-05-26 | Hernday Natasha | Director | A | ▲ buy | 3,5860 | — | — | 12,592 | +40% | +0.03% (now 0.10%) | filing |
| 2026-05-26 | Franklin Heather L | Director | A | ▲ buy | 3,5860 | — | — | 9,557 | +60% | +0.03% (now 0.08%) | filing |
| 2026-05-18 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | C | ▼ sell | 772→ 772,000 Common Stock, $0.0075 par value per share | — | — | 0 | — | — | filing |
| 2026-05-18 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | C | ▼ sell | 412→ 412,000 Common Stock, $0.0075 par value per share | — | — | 0 | — | — | filing |
| 2026-05-18 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | C | ▼ sell | 1,506→ 1,506,000 Common Stock, $0.0075 par value per share | — | — | 0 | — | — | filing |
| 2026-05-18 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | C | ▼ sell | 2,313→ 2,313,000 Common Stock, $0.0075 par value per share | — | — | 0 | — | — | filing |
| 2026-05-18 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | C | ▲ buy | 772,0000 | $4.03 | $3.11M | 772,000 | new | +6.2% (now 6.2%) | filing |
| 2026-05-18 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | C | ▲ buy | 412,0000 | $4.03 | $1.66M | 412,000 | new | +3.3% (now 3.3%) | filing |
| 2026-05-18 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | C | ▲ buy | 1,506,0000 | $4.03 | $6.07M | 2,773,545 | 2.2× | +12% (now 22%) | filing |
| 2026-05-18 | BVF PARTNERS L P/IL +9 more | 10% owner, See Explanation of Responses | C | ▲ buy | 2,313,0000 | $4.03 | $9.32M | 3,635,758 | 2.7× | +18% (now 29%) | filing |
| 2026-04-22 | Trigilio Jeffrey | Officer (Chief Financial Officer) | M | ▼ sell | 11,538→ 11,538 Common Stock | — | — | 126,924 | — | — | filing |
| 2026-04-22 | Trigilio Jeffrey | Officer (Chief Financial Officer) | M | ▲ buy | 11,5380 | — | — | 103,906 | +12% | +0.09% (now 0.83%) | filing |
| 2026-04-22 | Sitko Bradley | Officer (Chief Investment Officer) | M | ▼ sell | 3,737→ 3,737 Common Stock | — | — | 41,112 | — | — | filing |
| 2026-04-22 | Sitko Bradley | Officer (Chief Investment Officer) | M | ▲ buy | 3,7370 | — | — | 82,961 | +5% | +0.03% (now 0.66%) | filing |
| 2026-04-22 | Montano Maricel Perea | Officer (Chief Legal Officer) | M | ▼ sell | 3,370→ 3,370 Common Stock | — | — | 37,074 | — | — | filing |
| 2026-04-22 | Montano Maricel Perea | Officer (Chief Legal Officer) | M | ▲ buy | 3,3700 | — | — | 41,793 | +9% | +0.03% (now 0.33%) | filing |
| 2026-04-22 | Hughes Owen | Director, Officer (Chief Executive Officer) | M | ▼ sell | 10,568→ 10,568 Common Stock | — | — | 116,245 | — | — | filing |
| 2026-04-22 | Hughes Owen | Director, Officer (Chief Executive Officer) | M | ▲ buy | 10,5680 | — | — | 191,264 | +6% | +0.08% (now 1.5%) | filing |
| 2026-04-15 | Trigilio Jeffrey | Officer (Chief Financial Officer) | M | ▼ sell | 4,000→ 4,000 Common Stock | — | — | 26,000 | — | — | filing |
| 2026-04-15 | Trigilio Jeffrey | Officer (Chief Financial Officer) | F | ▼ sell | 1,6320 | $36.76 | $60.0K | 92,368 | −2% | −0.01% (now 0.74%) | filing |
| 2026-04-15 | Trigilio Jeffrey | Officer (Chief Financial Officer) | M | ▲ buy | 4,0000 | — | — | 94,000 | +4% | +0.03% (now 0.75%) | filing |
| 2026-03-31 | LIMBER JOSEPH M | Director | M | ▼ sell | 3,026→ 3,026 Common Stock | — | — | 0 | — | — | filing |
| 2026-03-31 | LIMBER JOSEPH M | Director | M | ▲ buy | 3,0260 | $11.20 | $33.9K | 9,234 | +49% | +0.02% (now 0.07%) | filing |
| 2026-03-26 | WYSZOMIERSKI JACK L | Director | M | ▼ sell | 3,026→ 3,026 Common Stock | — | — | 0 | — | — | filing |
| 2026-03-26 | WYSZOMIERSKI JACK L | Director | M | ▲ buy | 3,0260 | $11.20 | $33.9K | 21,530 | +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.