MarketPeel
Insider Trading Intelligence
BS

Bradley Sitko

XOMA
CHIEF INVESTMENT OFFICER · XOMA ROYALTY CORP · CIK 0001959809
FILING MIX · LIFETIME94%/6%
BUYS
31
SELLS
2
TOTAL VALUE
$417.8K
COMPANIES
1
ACTIVE SINCE
Jan 2023
HOLDINGS NOW
82,961
AVG SELL PX
TRADE KIND
SHOWING 33 / 33
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
23 backtested trades · 8 horizons · 11 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Bradley Sitko, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d23+52.17%+0.75%+0.23%+0.52%-0.19%
14d23+56.52%-0.95%+0.83%-1.79%-1.67%
30d23+47.83%+3.63%+3.08%+0.55%-2.65%
60d23+34.78%-1.98%+5.89%-7.87%-12.89%
90d23+34.78%-2.43%+4.49%-6.92%-11.59%
180d23+52.17%+17.27%+11.94%+5.34%-8.31%
1y23+100.00%+39.73%+24.39%+15.34%+4.54%
2y23(11 pending)+100.00%+59.99%+48.56%+11.43%-11.12%
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
XOMA · 82,961 shares · as of Apr 20, 2026
075,000150,000225,000300,000202420252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 31 buys / 2 sellsCOVERAGE · 14 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
XOMA
XOMA ROYALTY CORP
SALE
Chief Investment Officer
3,73741,112Apr 20, 2026Apr 22, 2026View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
3,73782,961Apr 20, 2026Apr 22, 2026View →
XOMA
XOMA ROYALTY CORP
PURCHASEGRANT
Stock grant
29,40279,224Mar 11, 2026Mar 13, 2026View →
XOMA
XOMA ROYALTY CORP
PURCHASEGRANT
Stock grant
30,00049,822Mar 11, 2026Mar 13, 2026View →
XOMA
XOMA ROYALTY CORP
PURCHASEGRANT
Stock grant
44,84944,849Mar 11, 2026Mar 13, 2026View →
XOMA
XOMA ROYALTY CORP
SALE
Chief Investment Officer
6,71223,488Sep 19, 2025Sep 23, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
6,71219,822Sep 19, 2025Sep 23, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
2,000$25.39$50.8K7,045Jun 30, 2025Jul 2, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
2,000$24.70$49.4K5,045Apr 7, 2025Apr 9, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
1,000$19.98$20.0K11,484Mar 31, 2025Apr 2, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
245$25.39$6.2K3,045Mar 31, 2025Apr 2, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
2,800$25.43$71.2K2,800Mar 21, 2025Mar 25, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
1,334$20.65$27.5K10,484Mar 21, 2025Mar 25, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
313$25.60$8.0K313Jan 8, 2025Jan 10, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
82$25.60$2.1K82Jan 8, 2025Jan 10, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
75$25.90$1.9K75Jan 8, 2025Jan 10, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
75$25.60$1.9K75Jan 8, 2025Jan 10, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
300$25.90$7.8K9,150Dec 31, 2024Jan 3, 2025View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
250$13.89$3.5K5,600Oct 3, 2023Oct 4, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
1,500$14.25$21.4K5,350Oct 2, 2023Oct 4, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
1,000$17.20$17.2K3,500May 31, 2023Jun 2, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
500$17.00$8.5K2,500May 31, 2023Jun 2, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
850$19.00$16.1K3,850May 23, 2023May 25, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
1,000$19.50$19.5K3,000May 19, 2023May 22, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASEGRANT
Stock grant
30,20030,200May 18, 2023May 22, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
100$23.20$2.3K1,900May 16, 2023May 17, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
300$23.19$7.0K1,800May 16, 2023May 17, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
100$23.25$2.3K2,000May 16, 2023May 17, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
1,500$23.40$35.1K1,500May 15, 2023May 16, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
43$18.66$80243May 12, 2023May 16, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASE
Chief Investment Officer
1,957$19.00$37.2K2,000May 12, 2023May 16, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASEGRANT
Stock grant
300,000300,000Jan 3, 2023Jan 6, 2023View →
XOMA
XOMA ROYALTY CORP
PURCHASEGRANT
Stock grant
250,000250,000Jan 3, 2023Jan 6, 2023View →
Other insiders · XOMA
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About this filer
CIK 0001959809
ROLE
Chief Investment Officer
PRIMARY
XOMA
COMPANIES
1
ACTIVE SINCE
Jan 2023
MARKETPEEL · /INSIDER/0001959809DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

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