2seventy Bio, Inc.

TSVTCIK 0001860782 · Every Form 4 filed by insiders at this issuer. See financials →

Annual report (10-K)

Latest 10-K/A filed Apr 28, 2025. Sentiment + YoY language diff vs prior year. Read sections →

Signal:NeutralFull-doc fallback

Full filing:tone -0.0010

Sentiment via Loughran-McDonald lexicon · YoY diff via Jaccard similarity + paragraph set difference.

Recent 8-K announcements

Per-item disclosure feed. Item 2.02 is the earnings release.

May 13, 20251.02 · Termination2.01 · Completion3.01 · Notice3.03 · Material Modification to Rights5.01 · Changes in Control5.02 · Departure/Election5.03 · Amendments to Articles9.01 · Financial Statements and Exhibits May 7, 2025no items parsed Mar 25, 2025no items parsed Mar 11, 2025no items parsed Feb 6, 2025no items parsed

YoY shift: Unscored

Year-over-year tone shift - average net-tone change across Risk Factors and MD&A vs the prior 10-K.

Why YoY instead of absolute: the LM lexicon has ~6.6× more negative words than positive (legal/risk-disclosure language is heavy on hedging), so every 10-K reads bearish on raw tone. Year-over-year change strips that bias and surfaces the actual shift in management's framing.

Per-snippet highlights

Sentence-level sentiment highlighting with category and subcategory filters is coming once the snippet-scoring pipeline lands. For now, dig into the actual section text on the Sections tab.

Top insiders

Most active reporters at 2seventy Bio, Inc.

Name	Roles	Filings
Baird William D III	OfficerDirector	17
Leschly Nick	OfficerDirector	14
Snow Jessica	Officer	12
Eatwell Victoria	Officer	9
Gregory Philip D	Officer	9

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All filings

97 Form 4 / 4-A filings, newest first

Filed	Insider	Top transaction	Shares	Price	Value
May 15, 2025	Casdin Capital, LLC Director	UTender	2,000,000	$5.00	$10,000,000
May 15, 2025	Baird William D III President and CEO · Director	DDisposition	1,002,825	-	-
May 15, 2025	Torres Denice Director	DDisposition	12,050	-	-
May 15, 2025	Newton Charles W. Director	DDisposition	17,092	-	-
May 15, 2025	Maus Marcela V. Director	DDisposition	12,050	-	-

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Real-time Form 4 intelligence. Smarter insider tracking.

Filed		Top transaction	Shares	Price	Value