# SIONNA THERAPEUTICS INC COMMON STOCK

SIONNA THERAPEUTICS INC COMMON STOCK is a security (CUSIP 829401108) tracked across SEC portfolio filings. 120 institutional managers reported $1.8B on Form 13F as of 2026-06-30; 17 registered fund positions totaling $89.7M via N-PORT as of 2026-05-31.

## Summary

- Issuer: SIONNA THERAPEUTICS INC
- Class: COMMON STOCK
- CUSIP: 829401108
- Asset category: EC
- 13F holders: 120
- 13F value: $1.8B
- 13F period: 2026-06-30
- N-PORT fund positions: 17
- N-PORT value: $89.7M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 120 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| RA CAPITAL MANAGEMENT, L.P. | Boston, MA | $397.1M | 9,905,045 |
| [TPG GP A, LLC](https://search.stillhousedata.com/firm/124153) | Fort Worth, TX | $260.4M | 6,494,962 |
| [ORBIMED ADVISORS LLC](https://search.stillhousedata.com/firm/118608) | New York, NY | $141.5M | 3,530,702 |
| [VIKING GLOBAL INVESTORS LP](https://search.stillhousedata.com/firm/132272) | STAMFORD, CT | $128.1M | 3,195,181 |
| [Atlas Venture Life Science Advisors, LLC](https://search.stillhousedata.com/firm/174766) | Cambridge, MA | $120.1M | 2,995,602 |
| ENAVATE SCIENCES GP, LLC | New York, NY | $99.3M | 2,478,030 |
| JPMORGAN CHASE & CO | NEW YORK, NY | $53.7M | 1,465,014 |
| BlackRock, Inc. | New York, NY | $52.0M | 1,295,867 |
| [JENNISON ASSOCIATES LLC](https://search.stillhousedata.com/firm/107959) | NEW YORK, NY | $51.6M | 1,172,133 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $48.7M | 1,184,951 |
| [CITADEL ADVISORS LLC](https://search.stillhousedata.com/firm/148826) | MIAMI, FL | $46.8M | 1,166,931 |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C) | New York, NY | $38.9M | 970,590 |
| STATE STREET CORP | BOSTON, MA | $30.3M | 756,227 |
| [PERCEPTIVE ADVISORS LLC](https://search.stillhousedata.com/firm/154703) | NEW YORK, NY | $26.4M | 658,439 |
| EVENTIDE ASSET MANAGEMENT, LLC | Boston, MA | $25.9M | 645,530 |

## Top fund holders (N-PORT)

_Showing 15 of 17 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [PGIM Jennison Health Sciences Fund](https://search.stillhousedata.com/fund/S000004380) | Prudential Sector Funds, Inc. | $27.9M | 200.77% |
| [T. Rowe Price Health Sciences Fund, Inc.](https://search.stillhousedata.com/fund/S000002088) | T. ROWE PRICE HEALTH SCIENCES FUND, INC. | $21.9M | 20.15% |
| abrdn Healthcare Investors | abrdn Healthcare Investors | $15.9M | 139.67% |
| abrdn Life Sciences Investors | abrdn Life Sciences Investors | $6.7M | 120.13% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $6.4M | 0.78% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $3.6M | 2.04% |
| [VANGUARD U.S. MOMENTUM FACTOR ETF](https://search.stillhousedata.com/fund/S000061302) | VANGUARD WELLINGTON FUND | $2.4M | 12.83% |
| [T. Rowe Price Health Sciences Portfolio](https://search.stillhousedata.com/fund/S000002083) | T. ROWE PRICE EQUITY SERIES, INC. | $1.4M | 21.60% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $1.1M | 2.26% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $599K | 0.10% |
| [Fidelity Nasdaq Composite Index ETF](https://search.stillhousedata.com/fund/S000006011) | Fidelity Commonwealth Trust | $593K | 0.54% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $482K | 0.16% |
| [Russell Investments U.S. Small Cap Equity ETF](https://search.stillhousedata.com/fund/S000089990) | Russell Investments Exchange Traded Funds | $268K | 54.32% |
| [Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF](https://search.stillhousedata.com/fund/S000048296) | Goldman Sachs ETF Trust | $215K | 2.18% |
| [Blackstone Alternative Multi-Strategy Fund](https://search.stillhousedata.com/fund/S000045538) | Blackstone Alternative Investment Funds | $173K | 0.48% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/829401108.md)
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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.