Kiniksa Pharmaceuticals, Ltd. (KNSA) has 20 known insider and institutional holders on record. The largest holder is Cormorant Asset Management, LP with 830,999 shares. Other notable holders include Baker Brothers Life Sciences LP and Mahoney Stephen F..
Over the last 12 months, insiders have made 72 transactions in KNSA stock — 17 buys (valued at $1.57M) and 11 sells (valued at $4.52M). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
KNSA Insider Ownership
Top Holder
Cormorant Asset Management, LP
830,999 shares
Buys (12 mo)
17
$1.57M value
Sells (12 mo)
11
$4.52M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Cormorant Asset Management, Lp |
Director |
830,999 |
2018-05-31 |
|
| 2 |
Baker Brothers Life Sciences Lp |
Director |
108,980 |
2022-06-30 |
|
| 3 |
Mahoney Stephen F. |
President & COO |
82,000 |
2019-09-19 |
|
| 4 |
Rizvi Qasim |
Chief Commercial Officer |
75,000 |
2020-09-14 |
|
| 5 |
Baker Bros. Advisors Lp |
Director |
50,394 |
2025-06-05 |
|
| 6 |
Heberlig Chris |
EVP & CFO |
50,000 |
2019-09-19 |
|
| 7 |
Megna Michael R |
Chief Accounting Officer |
27,418 |
2026-04-03 |
|
| 8 |
Tessari Eben |
Chief Strategy Officer |
17,031 |
2026-04-03 |
|
| 9 |
Moat Ross |
Chief Operating Officer |
10,294 |
2026-04-03 |
|
| 10 |
Patel Sanj K |
Chairman & CEO |
6,481 |
2026-04-03 |
|
| 11 |
Beetham Thomas W. |
EVP & Chief Legal Officer |
4,287 |
2021-03-23 |
|
| 12 |
Pano Arian |
Chief Clinical Dev. Officer |
3,888 |
2021-09-07 |
|
| 13 |
Popovits Kimberly J |
Director |
2,799 |
2025-06-05 |
|
| 14 |
Mccain Tracey L |
Director |
2,799 |
2025-06-05 |
|
| 15 |
Levy Richard S |
Director |
2,799 |
2025-06-05 |
|
| 16 |
Cole G Bradley |
Director |
2,799 |
2025-06-05 |
|
| 17 |
Malley Thomas |
Director |
2,799 |
2025-06-05 |
|
| 18 |
Quart Barry D |
Director |
2,690 |
2026-02-12 |
|
| 19 |
Ragosa Mark |
Chief Financial Officer |
1,750 |
2026-04-03 |
|
| 20 |
Paolini John F. |
Chief Medical Officer |
1,624 |
2026-04-03 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-04-01 |
Tessari Eben |
Chief Strategy Officer |
Option Exercise (Sell) |
1,773 |
- |
- |
| 2026-01-15 |
Tessari Eben |
Chief Strategy Officer |
RSU Award |
365 |
$24.16 |
$8.82K |
| 2026-04-01 |
Moat Ross |
Chief Operating Officer |
Option Exercise (Sell) |
1,611 |
- |
- |
| 2026-01-15 |
Moat Ross |
Chief Operating Officer |
RSU Award |
879 |
$24.16 |
$21.24K |
| 2026-04-01 |
Ragosa Mark |
Chief Financial Officer |
Option Exercise (Sell) |
1,750 |
- |
- |
| 2026-04-01 |
Paolini John F. |
Chief Medical Officer |
Option Exercise (Sell) |
1,624 |
- |
- |
| 2026-04-01 |
Patel Sanj K |
Chairman & CEO |
Option Exercise (Sell) |
6,481 |
- |
- |
| 2026-04-01 |
Megna Michael R |
Chief Accounting Officer |
Option Exercise (Sell) |
2,558 |
- |
- |
| 2026-01-15 |
Megna Michael R |
Chief Accounting Officer |
RSU Award |
372 |
$24.16 |
$8.99K |
| 2026-03-09 |
Ragosa Mark |
Chief Financial Officer |
Option Exercise (Sell) |
2,036 |
$22.89 |
$46.6K |
| 2026-03-02 |
Paolini John F. |
Chief Medical Officer |
Option Exercise (Sell) |
40,000 |
$10.36 |
$414.4K |
| 2026-02-12 |
Quart Barry D |
Director |
Option Exercise (Sell) |
2,690 |
$15.47 |
$41.61K |
| 2026-02-10 |
Quart Barry D |
Director |
Option Exercise (Sell) |
110 |
$15.47 |
$1.7K |
| 2026-02-09 |
Ragosa Mark |
Chief Financial Officer |
Option Exercise (Sell) |
8,374 |
$12.97 |
$108.61K |
| 2026-02-01 |
Levy Richard S |
Director |
Option Exercise (Sell) |
683 |
- |
- |
| 2026-02-04 |
Quart Barry D |
Director |
Option Exercise (Sell) |
2,602 |
$15.47 |
$40.25K |
| 2026-02-03 |
Quart Barry D |
Director |
Option Exercise (Sell) |
12,528 |
$15.47 |
$193.81K |
| 2026-02-02 |
Quart Barry D |
Director |
Informative Sell |
830 |
$45.00 |
$37.35K |
| 2026-01-08 |
Ragosa Mark |
Chief Financial Officer |
Informative Sell |
12,000 |
$41.89 |
$502.68K |
| 2025-12-15 |
Tessari Eben |
Chief Operating Officer |
Option Exercise (Sell) |
6,000 |
$8.83 |
$52.98K |
| 2025-12-15 |
Quart Barry D |
Director |
Option Exercise (Sell) |
20,129 |
$10.36 |
$208.54K |
| 2025-12-08 |
Ragosa Mark |
Chief Financial Officer |
Informative Sell |
42,841 |
$41.49 |
$1.78M |
| 2025-06-16 |
Tessari Eben |
Chief Operating Officer |
Option Exercise (Sell) |
6,500 |
$8.83 |
$57.4K |
| 2025-06-11 |
Tessari Eben |
Chief Operating Officer |
Option Exercise (Sell) |
45,042 |
$10.36 |
$466.64K |
| 2025-06-10 |
Tessari Eben |
Chief Operating Officer |
Informative Sell |
15,506 |
$30.46 |
$472.31K |
