Dyne Therapeutics, Inc.· DYN

🇺🇸 US · MidBroad USNASDAQ

HealthcareBiotechnologyWebsite

Price: $25.97
Day: +2.89%
Mkt Cap: $4.85B
52W Range: $9.89 – $26.26
Volume: 2.68M
Beta: 1.06

D55D FrameworkQuarterly Data

Holdings Analysis

Insider activity, institutional flows, and fund ownership.

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stockoscope.com

Dyne Therapeutics, Inc.

DYN|Healthcare|Biotechnology

Current price: $26

Smart Money

Dimension 5 of 5

Insider Activity, Q3 2026

Latest scored quarter, net flow, and top transactions by value

Net dollar flow-$24.5M

Net share flow-1.0M

Purchases0 ($0)

Sales12 ($24.5M)

Top Notable Transactions

Insider

Type

Value

Date

Kersten Dirk

Purchase

$25.0M

Jan 9

Rhodes Jason P

Sale

$6.7M

Feb 27

Atlas Venture Fund XI, L.P.

Sale

$6.7M

Feb 27

Institutional Ownership, Q1 2026

Ownership share, position changes, share flow, and top holders

Ownership113.8%

13F share flow-2.3%

Investors holding235

+185 adding-107 reducing

143

New 42Inc 143Red 61Closed 46

Top Institutional Holders

Institution

Value

Change

T. ROWE PRICE INVESTMENT MANAGEMENT, INC.

$558.1M

+93.8%

JANUS HENDERSON GROUP PLC

$247.4M

+8.5%

BLACKROCK, INC.

$212.1M

+15.4%

ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC

$165.5M

+10.4%

ETF & Mutual Fund Activity, Q2 2026

Latest meaningful quarter: fund-by-fund buying / unchanged / selling

Funds reporting94

Total shares held25.1M

Share flow-0.5%

38 buying10 selling

Buying 38Unchanged 46Selling 10

Top Fund Holders

Fund

Weight

Change

FIDELITY MT VERNON STREET TRUST

4.4M

12.75%

+1.7M

FIDELITY SELECT PORTFOLIOS

1.9M

3.39%

+515.4K

FIDELITY CONCORD STREET TRUST

1.3M

0.50%

+4.8K

SCHWAB STRATEGIC TRUST

773.4K

0.25%

-10.3K

See the complete picture

The full 5D Framework: Business Quality · Peer Comparison · Valuation · Analyst Sentiment · Smart Money

Explore DYN on stockoscope.com→

Generated August 5, 2026

For educational purposes only. Not financial advice. Data may be delayed or incomplete.

Smart Money Sentiment

DYN Smart Money Sentiment Score

A weighted 1-5 sentiment score across three smart money signals.

Smart Money

3.6/5

Bullish

Weighted across 3 components

Component Breakdown (3 of 3 available)

Insider Activity

40% weight

-35

Institutional Flow

50% weight

+70

Fund Flow

10% weight

+60

Overall Smart Money sentiment of 3.6/5 (Bullish) based on a weighted combination of 3 components. Insider activity uses a relative-baseline comparison against the stock's own history; institutional flow tracks position momentum and 13F share changes; fund flow measures ETF / mutual-fund buying vs selling. Higher scores indicate stronger bullish sentiment from professional investors.Last updated August 4, 2026.

Insider Trading Activity

Insider trading analysis comparing the latest quarter against the stock's own historical baseline.

Insider Activity for DYN

Net insider share flow by quarter (C-suite & director purchases minus sales)

Bearish Signal

Elevated insider selling in Q3 2026

12 sales totaling $24.5M (1.0M shares)

Share volume is elevated at 1.6x the historical average

Buying seen in 3 of 7 quarters

Insider buying in 3 of the last 4 quarters

Notable Recent Transactions, DYN

Top 8 highest-value recent insider trades

Kersten Dirk

Director

Buy

1,428,571 shares at $17.50

Jan 9, 2024$25.00M

Rhodes Jason P

Director

Sell

272,923 shares at $24.38

Feb 27, 2024$6.65M

Atlas Venture Fund XI, L.P.

Insider

Sell

272,923 shares at $24.38

Feb 27, 2024$6.65M

Kersten Dirk

Director

Sell

256,072 shares at $25.50

Jul 27, 2026$6.53M

Kersten Dirk

Director

Sell

131,290 shares at $45.25

Aug 15, 2024$5.94M

Rhodes Jason P

Director

Sell

253,039 shares at $22.79

Jul 6, 2026$5.77M

Kersten Dirk

Director

Sell

281,858 shares at $19.80

Mar 10, 2026$5.58M

Brumm Joshua T

CEO

Sell

202,238 shares at $25.30

Mar 8, 2024$5.12M

Institutional Ownership Analysis

Institutional ownership analysis with position momentum, 13F share flow, and ownership percentage trends.

Institutional Ownership Over Time for DYN

Total dollar value invested by institutions each quarter

Very Bullish

Institutions accumulating in Q1 2026

113.8% institutional ownership

Moderate accumulation: 185 adding vs 107 reducing

13F shares increased by 5.3%, a significant shift

Momentum weakening from prior quarter

Position Changes

Q2 2026: how are institutions adjusting their positions?

+32 growing-210 shrinkingNet: -178

197

New (10)

Increased (22)

Reduced (13)

Closed (197)

Top Institutional Holders, DYN

Largest 8 institutional positions by ownership percentage as of Q2 2026

ABRDN PLC

1.5M

$34.2M

Ownership

0.93%

+7.6%

TD ASSET MANAGEMENT INC

548.1K

$12.2M

Ownership

0.33%

+3.6%

WASATCH ADVISORS LP

443.7K

$9.9M

Ownership

0.27%

No change

NEW YORK STATE COMMON RETIREMENT FUND

356.0K

$7.9M

Ownership

0.22%

+6.7%

FISHER ASSET MANAGEMENT, LLC

298.5K

$6.6M

Ownership

0.18%

-7.6%

CITIGROUP INC

187.9K

$4.2M

Ownership

0.11%

+397.2%

ALPS ADVISORS INC

167.1K

$3.7M

Ownership

0.10%

+100.0%

Y-INTERCEPT (HONG KONG) LTD

156.2K

$3.5M

Ownership

0.09%

+139.7%

ETF and Mutual Fund Holdings

ETF and mutual fund activity breakdown showing buying vs selling funds, top fund holders, and detailed holdings.

Fund Activity

Q2 2026: 94 ETFs and mutual funds reporting

38 buying10 sellingNet: +28

Buying (38)

Unchanged (46)

Selling (10)

Very Bullish

Funds accumulating in Q2 2026

94 ETFs and mutual funds reporting

38 funds buying vs 10 selling

Top Fund Holders, DYN

Largest 8 ETF and mutual fund positions by shares held as of latest filing

FIDELITY MT VERNON STREET TRUST

4.4M

Weight

12.75%

Increased

FIDELITY SELECT PORTFOLIOS

1.9M

Weight

3.39%

Increased

FIDELITY CONCORD STREET TRUST

1.3M

Weight

0.50%

Increased

SCHWAB STRATEGIC TRUST

773.4K

Weight

0.25%

Decreased

COLUMBIA FUNDS SERIES TRUST I

145.9K

Weight

0.00%

Increased

Voya EQUITY TRUST

111.4K

Weight

1.03%

No change

NEUBERGER BERMAN EQUITY FUNDS

84.5K

Weight

0.51%

No change

iSHARES TRUST

81.4K

Weight

0.00%

Decreased

Dyne Therapeutics, Inc.· DYN

Holdings Analysis

Insider Trading Activity

1.3Transaction History395Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings63Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights

Search stocks

Holdings Analysis

Insider Trading Activity

1.3Transaction History395Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings63Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights