Milestone Pharmaceuticals Inc.
MIST- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001408443
No open-market purchases or sales by Milestone Pharmaceuticals Inc. insiders were filed in the last 90 days; 78 institutions reported holding it in 13F filings for Q2 2026, worth $66.4M in total; no superinvestor holds it.
Holders of 5% or more of MIST
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Milestone Pharmaceuticals Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Adage Capital Management, L.P. | 13G | 9.99%8.66M shares | New | Nov 13, 20251 filing | Nov 13, 2025 | SEC |
| RTW Investments, LP | 13G/A | 9.90%9.16M shares | −0.09 ppfrom 9.99% | Feb 14, 20252 filings | Nov 14, 2025 | SEC |
| Propel Bio Management, LLC | 13G | 9.90%8.86M shares | New | Dec 23, 20251 filing | Dec 23, 2025 | 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
10 Schedule 13D and 13G filings on Milestone Pharmaceuticals Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 26, 20265:37 PM ET | Trails Edge Capital Partners, LPand 2 others | 13G/A | 4.30%5.33M shares | −5.60 ppfrom 9.90%Below 5% | Mar 20, 2026 | SEC |
| Dec 23, 20252:20 PM ET | Propel Bio Management, LLCand 3 others | 13G | 9.90%8.86M shares | New | Jul 11, 2025 | SEC |
| Nov 14, 20254:05 PM ET | Trails Edge Capital Partners, LPand 2 others | 13G/A | 9.90%9.02M shares | 0.00 ppfrom 9.90% | Sep 30, 2025 | SEC |
| Nov 14, 20258:30 AM ET | RTW Investments, LPand 1 other | 13G/A | 9.90%9.16M shares | −0.09 ppfrom 9.99% | Sep 30, 2025 | SEC |
| Nov 13, 20259:10 AM ET | Adage Capital Management, L.P.and 2 others | 13G | 9.99%8.66M shares | New | Sep 30, 2025 | SEC |
| Jul 21, 20254:30 PM ET | Trails Edge Capital Partners, LPand 2 others | 13G | 9.90%8.85M shares | New | Jul 14, 2025 | SEC |
| Apr 30, 20254:00 PM ET | Integrated Core Strategies (US) LLCand 3 others | 13G/A | 0.60%322.1K shares | –Below 5% | Mar 31, 2025 | SEC |
| Apr 22, 20259:32 AM ET | BlackRock, Inc. | 13G/A | 0.00%0 shares | −7.60 ppfrom 7.60%Below 5% | Mar 31, 2025 | SEC |
| Feb 14, 20259:00 AM ET | RTW Investments, LPand 1 other | 13G/A | 9.99%5.64M shares | – | Dec 31, 2024 | SEC |
| Feb 5, 20251:23 PM ET | BlackRock, Inc. | 13G/A | 7.60%4.05M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Milestone Pharmaceuticals Inc. shares.
No Form 144 notices for Milestone Pharmaceuticals Inc. are on file.