XOMA insider buying
1 cluster buyXOMA Royalty Corp · Healthcare
When two or more insiders at XOMA Royalty Corp buy XOMA on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in XOMA plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.
Detected clusters
- Dec 31, 2024 – Jun 30, 2025Detected Jun 30, 2025High conviction3 insidersTotal bought$823.3KMarket cap$549.9M
All notable open-market buys in XOMA
Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.
| Date | Insider | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Dec 4, 2025 | Director, Chief Executive Officer | 100,000 | $25.05 | $2.5M | SEC ↗ |
| Jun 30, 2025 | Sitko Bradleycluster Chief Investment Officer | 2,000 | $25.39 | $50.8K | SEC ↗ |
| Apr 7, 2025 | LIMBER JOSEPH Mcluster Director | 5,243 | $25.60 | $134.2K | SEC ↗ |
| Apr 7, 2025 | Sitko Bradleycluster Chief Investment Officer | 2,000 | $24.70 | $49.4K | SEC ↗ |
| Apr 3, 2025 | LIMBER JOSEPH Mcluster Director | 16,524 | $25.22 | $416.7K | SEC ↗ |
| Apr 1, 2025 | BURNS THOMAS M.cluster SVP, Finance & CFO | 1,000 | $25.46 | $25.5K | SEC ↗ |
| Mar 31, 2025 | Sitko Bradleycluster Chief Investment Officer | 1,000 | $19.98 | $20.0K | SEC ↗ |
| Mar 31, 2025 | Sitko Bradleycluster Chief Investment Officer | 245 | $25.39 | $6.2K | SEC ↗ |
| Mar 21, 2025 | Sitko Bradleycluster Chief Investment Officer | 2,800 | $25.43 | $71.2K | SEC ↗ |
| Mar 21, 2025 | Sitko Bradleycluster Chief Investment Officer | 1,334 | $20.65 | $27.5K | SEC ↗ |
| Jan 8, 2025 | Sitko Bradleycluster Chief Investment Officer | 313 | $25.60 | $8.0K | SEC ↗ |
| Jan 8, 2025 | Sitko Bradleycluster Chief Investment Officer | 82 | $25.60 | $2.1K | SEC ↗ |
| Jan 8, 2025 | Sitko Bradleycluster Chief Investment Officer | 75 | $25.90 | $1.9K | SEC ↗ |
| Jan 8, 2025 | Sitko Bradleycluster Chief Investment Officer | 75 | $25.60 | $1.9K | SEC ↗ |
| Dec 31, 2024 | Sitko Bradleycluster Chief Investment Officer | 300 | $25.90 | $7.8K | SEC ↗ |
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XOMA insider buying — FAQ
- Are insiders buying XOMA stock?
- Yes — 4 distinct insiders have bought XOMA (XOMA Royalty Corp) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Dec 8, 2025.
- How much XOMA stock have insiders bought?
- Insiders have bought a combined $3.3M of XOMA across 15 open-market purchases, based on SEC Form 4 filings.
- What is an insider cluster buy in XOMA?
- A cluster buy is two or more distinct XOMA Royalty Corp insiders — officers, directors, or 10% owners — each buying XOMA on the open market within a rolling window. XOMA has 1 detected cluster buy to date.
- Where does this XOMA insider trading data come from?
- Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.
How we track insider buying in XOMA
We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy XOMA within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?
This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding XOMA.