Stock ownership · SEC 13F · Q2 2025

GENERATION BIO CO

Who owns GENERATION BIO CO (CUSIP 37148K100)? A look at the institutions behind it, how tightly they hold it, and the latest quarter's moves.

$166K
Reported value
1
Institutions
100%
Top-5 share

The verdict

As of Q2 2025, 1 institutions report $166K in GENERATION BIO CO positions, ownership that is dominated by its top few institutional owners.

1
institutions hold it
$166K
reported 13F value
100%
held by top 5

Based on long positions reported to the SEC as of Q2 2025; 13F omits shorts, options and non-US holdings.

How 13F ownership is computed · All tracked stocks · Concentration rankings

SEC Form 13F-HR ownership desk

CUSIP 37148K100 · Q2 2025 $0M reported

VALUE-TRACE · HOLDERS-FOCUS · CONC-DOM · PHOTO-UNK · ACTIVITY-LIGHT · BOOK-SHORT

  • VALUE-TRACE $0.2M
  • HOLDERS-FOCUS 1 filers
  • CONC-DOM 100% top-5
  • PHOTO-UNK No peer
  • ACTIVITY-LIGHT 1 new
  • BOOK-SHORT 3Q history

Read with: Ownership concentration guide - GENERATION BIO CO's top-five holders account for 100% of reported value — read concentration before treating any single filer as a signal.

Top Institutional Holders

# Institution Shares Value Share of reported
1 Squarepoint Ops LLC 518,270 $166K 100.0%

Investment Discretion

SEC Form 13F requires each institutional filer to report whether it exercises sole or shared discretion over a position. Among GENERATION BIO CO's reported holders for Q2 2025, by reported value:

Shared-defined discretion (DFND)
100.0%

Latest Quarter Activity · Q2 2025

New positions (1)

Squarepoint Ops LLC $166K

Complete exits (1)

RHUMBLINE ADVISERS exited

Frequently Asked Questions

How many institutions hold GENERATION BIO CO?▼
GENERATION BIO CO is held by 1 institutional investors per the latest SEC Form 13F filings as of Q2 2025.
What is the total institutional value of GENERATION BIO CO?▼
Institutions report $166K of GENERATION BIO CO as of Q2 2025.
How concentrated is ownership of GENERATION BIO CO?▼
The top five institutional holders account for 100% of the reported institutional value in GENERATION BIO CO, making ownership dominated by its top few institutional owners.
Who is the largest institutional holder of GENERATION BIO CO?▼
Squarepoint Ops LLC is the largest reported holder of GENERATION BIO CO with $166K across 518,270 shares as of Q2 2025.

Source: U.S. Securities and Exchange Commission (SEC) - EDGAR Form 13F-HR institutional holdings filings · Q2 2025 13F-HR discloses long US-listed equity positions of managers with $100M+ qualifying assets, filed within 45 days of period end. Short positions and most derivatives are not disclosed.

PlainFundData is rendered directly from SEC EDGAR Form 13F-HR institutional holdings filings, no number is typed in by an editor. Holder lists, concentration, and reported value on this page are aggregated live from those 13F-HR extracts. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-16.