# DYNE THERAPEUTICS INC COM

DYNE THERAPEUTICS INC COM is a security (CUSIP 26818M108) tracked across SEC portfolio filings. 242 institutional managers reported $2.8B on Form 13F as of 2026-06-30; 28 registered fund positions totaling $445.9M via N-PORT as of 2026-05-31.

## Summary

- Issuer: DYNE THERAPEUTICS INC
- Class: COM
- CUSIP: 26818M108
- Asset category: EC
- 13F holders: 242
- 13F value: $2.8B
- 13F period: 2026-06-30
- N-PORT fund positions: 28
- N-PORT value: $445.9M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 242 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| JANUS HENDERSON GROUP PLC | LONDON, X0 | $247.4M | 13,647,376 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $219.4M | 11,215,565 |
| BlackRock, Inc. | New York, NY | $212.1M | 11,699,870 |
| [Atlas Venture Life Science Advisors, LLC](https://search.stillhousedata.com/firm/174766) | Cambridge, MA | $165.5M | 9,130,465 |
| FMR LLC | BOSTON, MA | $161.5M | 8,908,980 |
| Orbis Allan Gray Ltd | HamiltoN, D0 | $122.6M | 6,762,231 |
| STATE STREET CORP | BOSTON, MA | $120.6M | 6,653,746 |
| [PERCEPTIVE ADVISORS LLC](https://search.stillhousedata.com/firm/154703) | NEW YORK, NY | $84.6M | 4,668,839 |
| FCPM III SERVICES B.V. | NAARDEN, P7 | $84.2M | 4,644,386 |
| TCG Crossover Management, LLC | PALO ALTO, CA | $83.7M | 4,615,144 |
| Vestal Point Capital, LP | NEW YORK, NY | $72.5M | 4,000,000 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $63.5M | 3,504,114 |
| [ARMISTICE CAPITAL, LLC](https://search.stillhousedata.com/firm/168978) | NEW YORK, NY | $57.6M | 3,175,110 |
| [Frazier Life Sciences Management, L.P.](https://search.stillhousedata.com/firm/317522) | MENLO PARK, CA | $57.2M | 3,153,082 |
| JPMORGAN CHASE & CO | NEW YORK, NY | $55.6M | 3,253,473 |

## Top fund holders (N-PORT)

_Showing 15 of 28 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [T. Rowe Price Small-Cap Stock Fund, Inc.](https://search.stillhousedata.com/fund/S000002120) | T. ROWE PRICE SMALL-CAP STOCK FUND, INC. | $127.1M | 157.53% |
| [T. Rowe Price Small-Cap Value Fund, Inc.](https://search.stillhousedata.com/fund/S000002121) | T. ROWE PRICE SMALL-CAP VALUE FUND, INC. | $83.9M | 90.94% |
| [T. Rowe Price Institutional Small-Cap Stock Fund](https://search.stillhousedata.com/fund/S000002094) | T. Rowe Price Equity Funds, Inc. | $69.1M | 159.42% |
| [Fidelity Growth Company Fund](https://search.stillhousedata.com/fund/S000007119) | Fidelity Mt. Vernon Street Trust | $55.3M | 5.60% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $29.1M | 3.57% |
| [T. Rowe Price New Horizons Fund, Inc.](https://search.stillhousedata.com/fund/S000002106) | T. ROWE PRICE NEW HORIZONS FUND, INC. | $15.8M | 12.39% |
| abrdn Life Sciences Investors | abrdn Life Sciences Investors | $13.9M | 246.97% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $13.2M | 7.55% |
| abrdn Healthcare Investors | abrdn Healthcare Investors | $12.1M | 106.27% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $4.6M | 2.10% |
| [T. Rowe Price Spectrum Moderate Growth Allocation Fund](https://search.stillhousedata.com/fund/S000002138) | T. ROWE PRICE SPECTRUM FUNDS II, INC. | $4.4M | 10.20% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $4.1M | 5.52% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $3.7M | 7.75% |
| [AZL T Rowe Price Capital Appreciation Fund](https://search.stillhousedata.com/fund/S000009963) | Allianz Variable Insurance Products Trust | $1.6M | 18.33% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $1.5M | 0.26% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/26818M108.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.