Public ownership evidence

Dyne Therapeutics, Inc. Common Stock (DYN) Ownership Disclosures

Read DYN insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Separate the three disclosure sources

Step 1 of 3

Recent Form 4 activity

Dyne Therapeutics, Inc. Common Stock: source evidence dated 2026-10-10T12:08:28.848Z.

Available
2026-10-06
Trade date
2026-10-02
Reporting owners
Posner Brian S
Code
P
Shares
2,500
Reported value
Not reported
What you should see

The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.

Step 2 of 3

Is this an insider transaction, 13F holding, or Congressional event?

Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.

SEC 0001193125-26-415584
What you should see

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Step 3 of 3

Read DYN fundamentals

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Read DYN fundamentals
What you should see

Keep reporting dates and units beside the answer, and inspect its original citations.

Recent Form 4 activity

See the complete recent form 4 activity

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2026-10-062026-10-02Posner Brian SP2,500Not reported
2026-09-082026-09-08Friedl-Naderer JohannaS185Not reported
2026-09-082026-09-04Friedl-Naderer JohannaS900Not reported
2026-09-082026-09-08Kerr DouglasS1,290Not reported
2026-09-082026-09-04Kerr DouglasS3,745Not reported
2026-09-082026-09-08Cox JohnS5,658Not reported
2026-08-182026-08-13Friedl-Naderer JohannaS226Not reported
2026-08-182026-08-13Kerr DouglasS1,556Not reported
2026-08-182026-08-13Lucera ErickS1,797Not reported
2026-08-182026-08-14Rhodes Jason PS322,465Not reported
2026-08-182026-08-14Rhodes Jason PS478,377Not reported
2026-08-182026-08-14Rhodes Jason PS1,359,674Not reported
2026-08-182026-08-13Rhodes Jason PS63,643Not reported
2026-08-182026-08-13Rhodes Jason PS94,415Not reported
2026-08-182026-08-13Rhodes Jason PS268,354Not reported
2026-08-182026-08-13Cox JohnS4,986Not reported
2026-07-302026-07-27Kersten DirkS5,388Not reported
2026-07-302026-07-27Kersten DirkS256,072Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Cornerstone Financial Management LLC2026-06-302026-08-2940$888None
Cornerstone Financial Management LLC2026-03-312026-08-2940$725None
Cornerstone Financial Management LLC2025-12-312026-08-2940$782None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25135,147$3,001,615None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-253,001,615$135,147,000None
Palo Alto Investors LP2026-06-302026-08-201,647,521$36,591,441None
Palo Alto Investors LP2026-06-302026-08-191,647,521$36,591,441None
Ensign Peak Advisors, Inc2026-03-312026-08-19496,590$9,003,177None
Ensign Peak Advisors, Inc2025-12-312026-08-19496,590$9,713,300None
Ensign Peak Advisors, Inc2025-09-302026-08-1920,150$254,898None
Palo Alto Investors LP2026-06-302026-08-181,647,521$36,591,441None
SummitTX Capital, L.P.2026-06-302026-08-15194,643$4,323,021None
SEI INVESTMENTS CO2026-06-302026-08-1543,477$965,624None
SEI INVESTMENTS CO2026-06-302026-08-15577$12,810None
Rafferty Asset Management, LLC2026-06-302026-08-15115,102$2,556,415None
Basecamp Wealth Advisors LLC2026-06-302026-08-1533$733None
Vestal Point Capital, LP2026-06-302026-08-153,375,000$74,958,750None
Quarry LP2026-06-302026-08-1526$577None
Saturn V Capital Management LP2026-06-302026-08-151,057,493$23,486,920None
Catalio Capital Management, LP2026-06-302026-08-15244,929$5,439,873None
ADAR1 Capital Management, LLC2026-06-302026-08-1542,821$951,054None
T. Rowe Price Investment Management, Inc.2026-06-302026-08-1530,912,287$686,562,000None
Frazier Life Sciences Management, L.P.2026-06-302026-08-153,153,082$70,029,951None
Deep Track Capital, LP2026-06-302026-08-151,500,000$33,315,000None
XTX Topco Ltd2026-06-302026-08-15125,786$2,793,707None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-151,202,203$26,700,929None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-151,202,203$26,700,929None
Neo Ivy Capital Management2026-06-302026-08-1531,440$698,282None
Caption Management, LLC2026-06-302026-08-1535,600$790,676Put
Caption Management, LLC2026-06-302026-08-157,894$175,326None
University of Wisconsin Foundation2026-06-302026-08-15313,559$6,964,146None
OSAIC HOLDINGS, INC.2026-06-302026-08-1531$689None
OSAIC HOLDINGS, INC.2026-06-302026-08-151,208$26,828None
Schonfeld Strategic Advisors LLC2026-06-302026-08-15134,752$2,992,841None
Orbis Allan Gray Ltd2026-06-302026-08-1522,680$503,723None
Orbis Allan Gray Ltd2026-06-302026-08-156,983,862$155,111,575None
Squarepoint Ops LLC2026-06-302026-08-15300,074$6,664,644None
MetLife Investment Management, LLC2026-06-302026-08-1579,775$1,771,803None
Venrock Adviser, LLC2026-06-302026-08-152,173,913$48,282,608None
JANE STREET GROUP, LLC2026-06-302026-08-1562,000$1,377,020Put
JANE STREET GROUP, LLC2026-06-302026-08-1519,100$424,211Call
Orion Porfolio Solutions, LLC2026-06-302026-08-1526,883$597,071None
BOOTHBAY FUND MANAGEMENT, LLC2026-06-302026-08-1530,600$679,626None
SPHERA FUNDS MANAGEMENT LTD.2026-06-302026-08-15199,594$4,432,983None
Legal & General Group Plc2026-06-302026-08-1561,882$1,374,400None
Legal & General Group Plc2026-06-302026-08-1522,814$506,699None
Legal & General Group Plc2026-06-302026-08-1513,244$294,149None
Ensign Peak Advisors, Inc2026-06-302026-08-15289,730$6,434,903None
MOORE CAPITAL MANAGEMENT, LP2026-06-302026-08-15305,794$6,791,685None
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-1514,900$330,929Call

90-day public filing window, up to 50 source positions.

Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Palo Alto Investors LP ↗Palo Alto Investors LP ↗Ensign Peak Advisors, Inc ↗Ensign Peak Advisors, Inc ↗Ensign Peak Advisors, Inc ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.

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