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DYN · Dyne Therapeutics, Inc.

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TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475TEAM-0.32% 13F +439META+2.47% 13F +2,694RCG-2.04% CLUSTERUTHR-4.03% 13F +425CRWV-1.12% 13F +693CRM-0.46% 13F +1,018CVNA+2.74% 13F +794TPL-0.71% 13F +444NET-4.47% 13F +710MSTR-1.35% 13F +526DELL+15.81% 13F +1,203CRWD-5.42% 13F +1,382ANET+2.87% 13F +1,323COIN-1.05% 13F +475

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DYN

Name: Dyne Therapeutics, Inc. (DYN) insider trading and ownership data
Creator: WaveMan
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Dyne Therapeutics, Inc.

PHARMA & BIOTECH · PHARMACEUTICAL PREPARATIONS · CIK 0001818794

FORM 144 · 33☆ WATCH

INSIDER NET · 180D

-$168.0M

open-market buys minus sells, Form 4 codes P and S

INSIDER BUYERS · 180D

CONGRESS BUYERS · 1Y

FUNDS ADDED · QTR

140

13F, latest reported quarter

REVENUE GROWTH

XBRL, annual

NET MARGIN

SEVEN FACTS, RANKED AGAINST THE SECTOR · RANK IS NOT A FORECAST

INSIDERS

net -$168.0M over 180 days

-$113.5M over 90 days

below 98% of Pharma & Biotech

CONGRESS

no member of Congress has reported trading it

FUNDS

140 funds added or opened last quarter

more than 77% of Pharma & Biotech

REVENUE

no revenue reported in any filing

MARGIN

no margin: this company reports no revenue to divide by

BUYBACKS

no share repurchases reported

SHORT

11.8% of shares outstanding short · 7.2 days to cover · settled 2026-07-31

more than 83% of Pharma & Biotech

THE SITUATION · EVERY LINE IS ONE RULE OVER ONE DATASET

Insiders are net sellers: -$168.0M across 6 people in 180 days.

140 funds added or opened positions in the latest 13F quarter, of 248 holders.

The year, with the filings on it

Total return indexed to 100 over the last 12 months · every marker is a federal filing, placed at its date — hover any marker for the detail

TOTAL 12M RETURN +86.2%

+86.2%12M

INSIDER SELLFORM 144

INDEXED RETURN, DIVIDEND-ADJUSTED — NOT A PRICE CHART · LARGE TRADES DRAWN FIRST WHEN A NAME FILES HEAVILY

Live price

Daily candles from TradingView, on their licence — no filings are marked on this one

WHY THIS NAME IS ON THE DESK

Insiders have filed to sell — before selling.

The record shows a net $168.0M sold by insiders over 180 days, 140 funds added last quarter, $108.1M in planned Form 144 sales. Every figure is a federal filing, dated the day it became public.

Backtest this pattern Open the screener

Same sector, ranked by filing activity

Sector from the SEC's own SIC classification

UTHR CPIX MRNA REGN LLY ALNY ELF CITR MDGL DNA VRTX NUVL

Insider transactions

Form 4 purchases and sales (codes P and S) — grants, option exercises and preferred conversions excluded

Over the last 180 days, Dyne Therapeutics, Inc. insiders sold a net $168.0M of stock across 470 Form 4 purchases and sales, with 1 insider(s) buying. Source: SEC Form 4 filings, as of 2026-09-04.

INSIDER

FILED

VALUE

Rhodes Jason P

Director

SELL

2026-08-14

1,359,674.0

$34.0M

Rhodes Jason P

Director

SELL

2026-08-14

478,377.0

$12.0M

Rhodes Jason P

Director

SELL

2026-08-14

322,465.0

$8.1M

Lucera Erick

Chief Financial Officer

SELL

2026-08-13

1,797.0

$47.2K

Kerr Douglas

Chief Medical Officer

SELL

2026-08-13

1,556.0

$40.9K

470 TRANSACTIONS ON RECORD

Showing the most recent few. Create a free account to see 465 more transactions on record, the cross-source screener and CSV export. We store only your email address, and there is no password to create.

Institutional holders

13F · holdings as of the latest quarter funds have reported

BlackRock, Inc.

12,404,330.0 sh

$275.5M

Jupiter Topco LLC

11,997,738.0 sh

$266.6M

FMR LLC

11,207,000.0 sh

$248.9M

STATE STREET CORP

7,458,263.0 sh

$165.6M

Orbis Allan Gray Ltd

7,006,542.0 sh

$155.6M

SCHEDULE 13D/G

No 5%+ ownership filings

Nobody has crossed 5% with a filing obligation. Absence is a fact here, not missing data.

Planned sales · Form 144

Filed before the sale — intent, not a trade

Atlas Venture Fund XI, LP

FILED 2026-08-14

$35.3M

Atlas Venture Opportunity Fund I, LP

FILED 2026-08-14

$8.4M

Atlas Venture Opportunity Fund II, LP

FILED 2026-08-14

$12.4M

Atlas Venture Fund XI, LP

FILED 2026-08-13

$7.0M

Atlas Venture Opportunity Fund I, LP

FILED 2026-08-13

$1.7M

Fund concentration

N-PORT · funds ranked by how much of THEMSELVES they put in this stock — the conviction number 13F cannot show

Wasatch Ultra Growth Fund

$7.9M POSITION · AS OF 2026-03-31

2.0%

T. Rowe Price Health Care ETF

$380.2K POSITION · AS OF 2026-03-31

1.9%

T. Rowe Price Institutional Small-Cap Stock Fund

$69.1M POSITION · AS OF 2026-03-31

1.6%

T. Rowe Price Small-Cap Stock Fund, Inc.

$127.1M POSITION · AS OF 2026-03-31

1.6%

Invesco Dorsey Wright Healthcare Momentum ETF

$1.4M POSITION · AS OF 2026-04-30

1.1%

T. Rowe Price Small-Cap Value Fund, Inc.

$83.9M POSITION · AS OF 2026-03-31

0.9%

SEC N-PORT, MONTHLY WITH A ~60-DAY PUBLIC LAG · FUNDS ≥ $10M · % = SHARE OF THE FUND'S OWN BOOK

Clinical pipeline

ClinicalTrials.gov · 4 registered trials, 4 still enrolling or running — a status change here is dated weeks before the press release

Phase 3

2 ACTIVE

Multi-phase

2 ACTIVE

TRIALS MATCHED TO THIS TICKER BY SPONSOR NAME · STUDIES RUN UNDER A SUBSIDIARY'S OWN NAME ARE NOT INCLUDED

Fundamentals

Annual figures from XBRL filings · pick a past date to see them exactly as the market knew them then — restatements and all

	2025-12	2024-12	2023-12	2022-12
OPERATING INCOME	$-468.2M	$-343.9M	$-242.2M	$-171.0M
NET INCOME	$-446	$-317	$-236	$-168
EPS (DILUTED)	-3.47	-3.37	-3.95	-3.23
OPERATING CASH FLOW	$-403.2M	$-292.4M	$-188.2M	$-153.6M
CASH	$893.4M	$435.4M	$121.6M	$172.1M
LONG-TERM DEBT	$148.9M	$0	—	—

SEC XBRL · FISCAL-YEAR PERIODS · AS KNOWN ON 2026-09-04 · NOBODY ELSE SHOWS FUNDAMENTALS AS OF A PAST DATE