Reporting owner · CIK 0002047381
Ambrose Allison
Visual SEC Form 4 history across 1 companies, 4 transactions and 3 filings.
GCGeneral CounselUpstream Bio, Inc.
Open-market mix
0%buys
Open-market buy performance
90-day forward return on this insider's open-market purchases
Forward return is not available yet
We compute this from each buy's stock performance 90 days after the transaction. The price history is still being populated for this insider's their open-market buys, so the average and median will appear here once the daily price refresh has covered the relevant trading days.
Monthly open-market activity
Reported purchase and sale transaction counts
Buys Sells
Net value flow
Buys minus sells
Feb 25
$0
Jan 26
$0
Sep 26
−$2.7K
Transaction texture
Ownership and ticket size
Average P/S size$2.7K
Median P/S size$2.7K
Direct4
Indirect0
Sep 16, 2026sale
Filing-only signals
Deterministic matches in this insider's history
Latest Form 4 facts
Quick context from source filings
Latest buy
No open-market insider purchase is available.
Associated companies
Visual map of known reporting history
Latest insider transactions
Form 4 filings from available history. Click any column to sort; click it again to flip the order.
| ID | Ticker | Insider | Role | Type | Shares | Value | Code | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|
| #223731 | UPB | Ambrose Allison | GC | sale | 485 | -$266k | S | 09/17 | 09/16 |
| #106416 | UPB | Ambrose Allison | GC | grant | 51.0k | $0 | A | 01/06 | 01/02 |
| #106415 | UPB | Ambrose Allison | GC | grant | 17.0k | $0 | A | 01/06 | 01/02 |
| #124933 | UPB | Ambrose Allison | GC | grant | 25.0k | $0 | A | 02/07/2025 | 02/06/2025 |
Ambrose Allison Insider Activity FAQ
SEC Form 4 context
Who is Ambrose Allison?
Ambrose Allison is a reporting owner in SEC Form 4 filings with reporting owner CIK 0002047381.
Which companies has Ambrose Allison reported transactions for?
Upstream Bio, Inc.
When was Ambrose Allison's latest insider buy?
No open-market insider purchase is available for this period.
When was Ambrose Allison's latest insider sale?
sale at Upstream Bio, Inc. on Sep 16, 2026 valued at $2,663.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
This version does not calculate win rates, forward returns, benchmark-adjusted returns, or high-conviction scores.