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bluebird bio, Inc.

CIK 1293971 · last filed 2021-11-08

bluebird bio, Inc. is a corporate insider who has filed 1 SEC Form 4 insider transactions across 1 company since 2021. The most recent filing, for TSVT, was dated Nov 8, 2021. The firm reports its address in Somerville, MA. 92 SEC filings were submitted jointly with David Davidson.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$0

Companies

1

Total Filings

1

Lifetime Open-Market Net

$0

Filer Profile

Reported Address
455 GRAND UNION BOULEVARD
SOMERVILLE, MA 02145
Phone
(339) 499-9300
State of Incorporation
DE
Formerly Known As
Genetix Pharmaceuticals Inc (2004–2010)
Related Filers
David Davidson — 92 joint filings, latest 2021-04-07
Philip D Gregory — 67 joint filings, latest 2021-11-17
Nick Leschly — 66 joint filings, latest 2025-06-03
Jeffrey T. Walsh — 63 joint filings, latest 2019-08-21
Jason Cole — 53 joint filings, latest 2022-08-23
Andrew Obenshain — 34 joint filings, latest 2025-06-03
DANIEL LYNCH — 29 joint filings, latest 2021-11-17
Eric Sullivan — 29 joint filings, latest 2017-08-07
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
2seventy bio, Inc. (TSVT) Delisted 10%+ Owner 23,369,088 $5.00 $116.85M $0 1 2021-11-08

Recent Filings

1 filing
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2021-11-08 2seventy bio, Inc. (TSVT) Delisted Mixed −100 $0 EDGAR
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.