MarketPeel
Insider Trading Intelligence
AA

Allison Ambrose

UPB
GENERAL COUNSEL · UPSTREAM BIO, INC. · CIK 0002047381
FILING MIX · LIFETIME67%/33%
BUYS
4
SELLS
2
TOTAL VALUE
$7.3K
COMPANIES
1
ACTIVE SINCE
Dec 2024
HOLDINGS NOW
16,048
AVG SELL PX
$7.69
TRADE KIND
SHOWING 6 / 6
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
1 backtested trades · 8 horizons · 3 pending
Forward-return performance of every backtestable P/S trade by Allison Ambrose, 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
7d1+100.00%-12.07%-2.04%-10.03%-10.03%
14d1+100.00%-8.64%-5.54%-3.10%-3.10%
30d1+0.00%+2.81%+4.62%-1.81%-1.81%
60d1+100.00%-9.47%+10.95%-20.42%-20.42%
90d1+100.00%-34.81%+10.87%-45.68%-45.68%
180d1(1 pending)
1y1(1 pending)
2y1(1 pending)
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
UPB · 16,048 shares · as of Jun 16, 2026
025,00050,00075,000100,00020252026SHARES HELD
Trading cadence · quarterly flow
BUY SELL
2024
2025
2025
2025
2025
2026
2026
FLOW · 4 buys / 2 sellsCOVERAGE · 7 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
UPB
UPSTREAM BIO, INC.
SALE
General Counsel
477$6.10$2.9K16,048Jun 16, 2026Jun 17, 2026View →
UPB
UPSTREAM BIO, INC.
SALE
General Counsel
475$9.29$4.4K16,525Mar 16, 2026Mar 17, 2026View →
UPB
UPSTREAM BIO, INC.
PURCHASEGRANT
Stock grant
17,00017,000Jan 2, 2026Jan 6, 2026View →
UPB
UPSTREAM BIO, INC.
PURCHASEGRANT
Stock grant
51,00051,000Jan 2, 2026Jan 6, 2026View →
UPB
UPSTREAM BIO, INC.
PURCHASEGRANT
Stock grant
25,00025,000Feb 6, 2025Feb 7, 2025View →
UPB
UPSTREAM BIO, INC.
PURCHASEGRANT
Stock grant
100,000100,000Dec 16, 2024Dec 17, 2024View →
Other insiders · UPB
Loading peer insiders…
About this filer
CIK 0002047381
ROLE
General Counsel
PRIMARY
UPB
COMPANIES
1
ACTIVE SINCE
Dec 2024
MARKETPEEL · /INSIDER/0002047381DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

One short email. Insider buys, congressional trades, and plain-English analysis.

Feedback