Paul D. Rubin is Sr. VP Clinical Dev. & CMO at XOMA LTD /DE/ (XOMA). They have made 9 open-market trades across 2 companies since 2006, most recently 2026-04-01.
CIK 0001210905
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 9 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| XOMA | 326,601 | $13.2M |
| CRTX | 114,303 | $223K |
| BIOA | 8,820 | $42K |
| Total | $13.4M |
Shares reported on the most recent Form 4, priced at the 2026-04-03 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BIOA | SELL · 10b5-1 | 2026-04-01 | 2026-04-03 | $17.81 | $157K | -2.2% | -4.4% | +44.7% |
| BIOA | SELL | 2026-03-02 | 2026-03-03 | $20.30 | $151K | -9.6% | -15.5% | -17.0% |
| BIOA | SELL · 10b5-1 | 2026-02-02 | 2026-02-03 | $18.75 | $139K | -3.6% | +0.4% | -18.3% |
| BIOA | SELL | 2026-01-02 | 2026-01-06 | $12.85 | $95K | +24.9% | +23.8% | +8.6% |
| BIOA | SELL · 10b5-1 | 2025-12-09 | 2025-12-11 | $12.00 | $216K | +3.9% | +40.3% | +57.8% |
| BIOA | SELL · 10b5-1 | 2025-12-04 | 2025-12-05 | $10.19 | $1.4M | +8.4% | +11.2% | +79.6% |
| XOMA | SELL | 2016-03-22 | 2016-03-22 | $0.78 | $19K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2015-07-15 | 2015-07-17 | $4.60 | $23K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2015-07-09 | 2015-07-10 | $4.55 | $152K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL | 2015-05-28 | 2015-06-01 | $3.60 | $6K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2015-03-23 | 2015-03-23 | $3.94 | $129K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2014-12-15 | 2014-12-16 | $4.63 | $7K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2014-11-20 | 2014-11-21 | $4.55 | $23K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2014-10-28 | 2014-10-29 | $4.57 | $23K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2014-09-15 | 2014-09-16 | $4.59 | $23K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2014-08-15 | 2014-08-19 | $4.34 | $116K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2014-06-16 | 2014-06-18 | $4.54 | $53K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL | 2014-05-28 | 2014-05-29 | $4.22 | $8K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL | 2014-05-13 | 2014-05-15 | $3.84 | $38K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2014-03-18 | 2014-03-20 | $6.32 | $111K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2014-02-18 | 2014-02-19 | $7.55 | $45K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2014-01-21 | 2014-01-23 | $8.27 | $50K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2013-12-18 | 2013-12-18 | $5.67 | $34K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2013-11-27 | 2013-12-02 | $4.54 | $21K | -22.4% | -11.6% | -11.6% |
| XOMA | SELL · 10b5-1 | 2013-11-18 | 2013-11-19 | $4.08 | $5K | -22.4% | -11.6% | -11.6% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.