UPB Adam Houghton sold Upstream Bio, Inc. shares — SEC Form 4SELLUpstream Bio, Inc.

Adam Houghton, Chief Business Officer at Upstream Bio, Inc. (UPB), sold 699 shares at $9.29 ($6K) on 2026-03-16, disclosed to the SEC on 2026-03-17.

SEC EDGAR Filing

0001193125-26-111105

View on SEC EDGAR

Trade context

Open-market sale of $6k UPB by Chief Business Officer. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.

Modest58/100

Nothing distinguishes this filing.

Opportunistic Sell

Trade Context

•Decreased holdings by 3%
•4 other insiders also sold in last 30 days
•Stock down -69% in previous 3 months

Filing Info

Filed2026-03-17

Traded2026-03-16

Accession0001193125-26-111105

SourceSEC EDGAR (Live)

Insider

NameAdam Houghton

TitleChief Business Officer

PIT GradeInsiderUnrated

View Company View Insider

Related Trades by This Insider

Ticker	Type	Filed	Value	7d Stock	Filing
UPB	SELL	2026-09-17	$4K	—	Filing →
UPB	SELL	2026-06-17	$4K	—

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UPB Adam Houghton sold Upstream Bio, Inc. shares — SEC Form 4SELLUpstream Bio, Inc.

Trade Context

Filing Info

Insider

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