Kiniksa Pharmaceuticals International, plc
KNSA- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001730430
In the last 90 days, Kiniksa Pharmaceuticals International, plc insiders filed 0 open-market purchases and 2 sales; 267 institutions reported holding it in 13F filings for Q2 2026, worth $2.99B in total; no superinvestor holds it.
Holders of 5% or more of KNSA
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Kiniksa Pharmaceuticals International, plc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Rubric Capital Management LP | 13G/A | 9.24%3.91M shares | +1.19 ppfrom 8.05% | May 14, 20252 filings | Jul 9, 2025 | SEC |
| Vanguard Group Inc | 13G/A | 7.04%3.06M shares | – | Oct 31, 20251 filing | Oct 31, 2025 | SEC |
| Tang Capital Management LLC | 13G | 5.20%2.18M shares | New | Apr 4, 20251 filing | Apr 4, 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
7 Schedule 13D and 13G filings on Kiniksa Pharmaceuticals International, plc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Oct 31, 202511:04 AM ET | Vanguard Group Inc | 13G/A | 7.04%3.06M shares | – | Sep 30, 2025 | SEC |
| Jul 17, 20257:44 PM ET | BlackRock, Inc. | 13G/A | 1.00%418.2K shares | −4.40 ppfrom 5.40%Below 5% | Jun 30, 2025 | SEC |
| Jul 9, 20254:06 PM ET | Rubric Capital Management LPand 1 other | 13G/A | 9.24%3.91M shares | +1.19 ppfrom 8.05% | Jun 30, 2025 | SEC |
| May 14, 20254:04 PM ET | Rubric Capital Management LPand 1 other | 13G/A | 8.05%3.38M shares | – | Mar 31, 2025 | SEC |
| Apr 23, 20257:47 PM ET | BlackRock, Inc. | 13G/A | 5.40%2.26M shares | – | Mar 31, 2025 | SEC |
| Apr 4, 20256:57 PM ET | Tang Capital Management LLCand 5 others | 13G | 5.20%2.18M shares | New | Mar 28, 2025 | SEC |
| Feb 14, 20253:45 PM ET | Fairmount Funds Management LLCand 3 others | 13G/A | 0.00%0 shares | –Below 5% | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Kiniksa Pharmaceuticals International, plc shares.
No Form 144 notices for Kiniksa Pharmaceuticals International, plc are on file.