Security key
G52694109
Kiniksa Pharmaceuticals International, plc - Common Stock (KNSA)
CUSIP: G52694109
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 42,953,248
- Total 13F value
- $1,771,666,340
- Share change
- +1,915,351
- Put/Call ratio
- 4.3%
- SEC-reported price per share
- $41.25
- Number of holders
- 222
- Value change
- +$79,894,259
- Number of buys
- 113
- Number of sells
- 88
- Shares outstanding
- 46,087,073
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2025
Institutions
222
Top holders
10
KNSA full security history
Ownership snapshot
Full 13F holder table
Kiniksa Pharmaceuticals International, plc SEC filings
Kiniksa Pharmaceuticals International, plc company facts
Broader feeds
Ownership snapshot
Top reported holders of KNSA - Kiniksa Pharmaceuticals International, plc - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Rubric Capital Management LP
Disclosed value leader
Rubric Capital Management LP
Comparable rows
15/15
Latest evidence
30 Sep 2025
13F
13D/G
Lead comparable stake: 7.4%
13D/G row: Rubric Capital Management LP
Showing 1-6 of 15 holder rows.
Quick read
Rubric Capital Management LP leads the comparable SEC ownership view at 7.4%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Rubric Capital Management LP's linked filing trail.
Comparable ownership
Top 5
Rubric Capital Management LP
7.4%
VANGUARD GROUP INC
7%
TANG CAPITAL MANAGEMENT LLC
5.2%
BAKER BROS. ADVISORS LP
6.1%
Fairmount Funds Management LLC
3.8%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Rubric Capital Management LP |
13F
13D/G
Company
|
7.4%
from 13D/G
|
$155,320,000
4,000,000 shares
|
— | 30 Sep 2025 |
| VANGUARD GROUP INC |
13D/G
13F
The Vanguard Group · Company
|
7%
|
$118,941,532
3,063,135 shares
|
$0 | 30 Sep 2025 |
| TANG CAPITAL MANAGEMENT LLC |
13F
13D/G
Company
|
5.2%
from 13D/G
|
$90,419,887
2,328,609 shares
|
— | 30 Sep 2025 |
| BAKER BROS. ADVISORS LP |
13F
Company
|
6.1%
|
$109,681,897
2,824,669 shares
|
— | 30 Sep 2025 |
| Fairmount Funds Management LLC |
13F
Company
|
3.8%
|
$68,839,338
1,772,839 shares
|
— | 30 Sep 2025 |
| ACADIAN ASSET MANAGEMENT LLC |
13F
Company
|
3.5%
|
$62,824,000
1,618,521 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
222
Shares
42,953,248
Rows available
222
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
200
Q4 2025 holders
222
Holder diff
22
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|