Avalyn Pharma Inc.
AVLN- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001540171
No open-market purchases or sales by Avalyn Pharma Inc. insiders were filed in the last 90 days; 93 institutions reported holding it in 13F filings for Q2 2026, worth $1.46B in total; Soros Fund Management is the only superinvestor holding it.
Holders of 5% or more of AVLN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Avalyn Pharma Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| FMR LLC | 13G/A | 13.20%5.84M shares | +1.70 ppfrom 11.50% | May 5, 20262 filings | Aug 6, 2026 | SEC |
| Novo Holdings A/S | 13G | 8.80%3.88M shares | New | Aug 14, 20261 filing | Aug 14, 2026 | SEC |
| Sr One Capital Management, LLC | 13D | 7.50%3.31M shares | New | May 8, 20261 filing | May 8, 2026 | SEC |
| Perceptive Advisors LLC | 13G | 6.00%2.68M shares | New | May 7, 20261 filing | May 7, 2026 | SEC |
| Suvretta Capital Management, LLC | 13D | 5.60%2.50M shares | New | May 8, 20261 filing | May 8, 2026 | SEC |
| Norwest Venture Partners XV, LP | 13G | 5.10%2.27M shares | New | Aug 11, 20261 filing | Aug 11, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
7 Schedule 13D and 13G filings on Avalyn Pharma Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| May 8, 20266:52 PM ET | Suvretta Capital Management, LLCand 3 others | 13D | 5.60%2.50M shares | New | May 1, 2026 | SEC |
| May 8, 20264:41 PM ET | Sr One Capital Management, LLCand 5 others | 13D | 7.50%3.31M shares | New | May 1, 2026 | SEC |
| May 7, 20264:16 PM ET | Perceptive Advisors LLCand 3 others | 13G | 6.00%2.68M shares | New | Apr 30, 2026 | SEC |
| May 5, 202610:06 AM ET | FMR LLCand 1 other | 13G | 11.50%4.79M shares | New | May 1, 2026 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Avalyn Pharma Inc. shares.
No Form 144 notices for Avalyn Pharma Inc. are on file.