Stock ownership · SEC 13F · Q4 2025

DYNE THERAPEUTICS INC

Who owns DYNE THERAPEUTICS INC (CUSIP 26818M108)? A look at the institutions behind it, how tightly they hold it, and the latest quarter's moves.

$1.4M
Reported value
2
Institutions
100%
Top-5 share

The verdict

As of Q4 2025, 2 institutions report $1.4M in DYNE THERAPEUTICS INC positions, ownership that is dominated by its top few institutional owners.

2
institutions hold it
$1.4M
reported 13F value
100%
held by top 5

Based on long positions reported to the SEC as of Q4 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 26818M108 · Q4 2025 $1M reported

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

  • VALUE-TRACE $1.4M
  • HOLDERS-FOCUS 2 filers
  • CONC-DOM 100% top-5
  • PHOTO-UNK No peer
  • ACTIVITY-LIGHT 2 new
  • BOOK-MID 7Q history

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

Institutional ownership over time

The number of institutions reporting a DYNE THERAPEUTICS INC position has risen from 1 to 2 over the last 7 quarters of 13F filings.

012345 Q2'24Q3'24Q4'24Q1'25Q2'25Q3'25Q4'25 2
Distinct 13F filers holding DYNE THERAPEUTICS INC, by quarter

Top Institutional Holders

# Institution Shares Value Share of reported
1 Seven Fleet Capital Management LP 70,180 $1.4M 100.0%
2 Bell Investment Advisors, Inc 26 $509 0.0%

Investment Discretion

SEC Form 13F requires each institutional filer to report whether it exercises sole or shared discretion over a position. Among DYNE THERAPEUTICS INC's reported holders for Q4 2025, by reported value:

Sole discretion (SOLE)
100.0%

Latest Quarter Activity · Q4 2025

New positions (2)

Seven Fleet Capital Management LP $1.4M
Bell Investment Advisors, Inc $509

Complete exits (2)

CIBC Bancorp USA Inc. exited
JPMORGAN CHASE & CO (JPM, AMJB, VYLD, JPM-PC, JPM-PD, JPM-PJ, JPM-PK, JPM-PL, JPM-PM) exited

Frequently Asked Questions

How many institutions hold DYNE THERAPEUTICS INC?▼
DYNE THERAPEUTICS INC is held by 2 institutional investors per the latest SEC Form 13F filings as of Q4 2025.
What is the total institutional value of DYNE THERAPEUTICS INC?▼
Institutions report $1.4M of DYNE THERAPEUTICS INC as of Q4 2025.
How concentrated is ownership of DYNE THERAPEUTICS INC?▼
The top five institutional holders account for 100% of the reported institutional value in DYNE THERAPEUTICS INC, making ownership dominated by its top few institutional owners.
Who is the largest institutional holder of DYNE THERAPEUTICS INC?▼
Seven Fleet Capital Management LP is the largest reported holder of DYNE THERAPEUTICS INC with $1.4M across 70,180 shares as of Q4 2025.

Source: U.S. Securities and Exchange Commission (SEC) - EDGAR Form 13F-HR institutional holdings filings · Q4 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.