$KNSA

$72.98 -$3.75 (4.89%) Close

$KNSA Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 77.6M shares outstanding

Who owns KNSA?

By type of holder

Institutions 60.3% Insiders 0.0% Everyone else 39.7%

Concentration Top 10 holders own 41.0%

FMR LLC 9.0% · Rubric Capital Management LP 5.2%

Institutional ownership

60.3%

+1.9 pts vs last qtr

Institutional holders

262

+38 vs last qtr

Net shares bought

+1.5M

by institutions in Q2 2026

New / sold out

70 / 32

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

BlackRock, Inc. +2.3M
Invesco Ltd. +745.2K

Biggest sellers in Q2 2026

Acadian Asset Management LLC −657.2K
Janus Henderson Group PLC SOLD OUT −481.0K

Who is planning to sell?

Notices of proposed sale, last 12 months

$50.9M

16 notices from 8 people

Shares covered

997.8K

1.29% of the company

Arranged in advance

89%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Patel Sanj K Officer 10b5-1 $28.8M
Tessari Eben Former affiliate $7.94M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2019–FY2025

+46.1%

+6.53% a year

Each share's claim on the business

−31.6%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $181M

over 7 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years85% Under 1 year15%

Quarterly turnover

17.2%

of institutional shares changed hands

Top 10 managers, median time held

2 years

Super Investors

Investment managers reporting KNSA on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
F FMR LLC	7.0M	8.99%	+147.7K (+2.2%)	2024	0.0%
Shares held by quarter Peak holding7.0M (Q2'26) Change over 8 quarters+6.3M Share of the company8.990% FMR LLC's full portfolio →
RC Rubric Capital Management LP	4.0M	5.16%	+249.8K (+6.7%)	2024	2.4%
Shares held by quarter Peak holding4.0M (Q3'25) Change over 8 quarters+1.6M Share of the company5.160% Rubric Capital Management LP's full portfolio →

FMR LLC

7.0M

% of company

8.99%

Change vs last qtr

+147.7K (+2.2%)

Held since

2024

Rubric Capital Management LP

4.0M

% of company

5.16%

Change vs last qtr

+249.8K (+6.7%)

Held since

2024

28 more super investors behind a free account

See every manager holding Kiniksa Pharmaceuticals International, PLC, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting KNSA on Form N-PORT; together they hold 6.4% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$84.3M	1.3M	1.70%	0.00%	June 30, 2026
VS Vanguard Small-Cap Index Fund Vanguard Index Funds	$61.1M	954.7K	1.23%	0.03%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$84.3M

% of company

1.70%

% of the fund

0.00%

As of

June 30, 2026

Vanguard Small-Cap Index Fund

Vanguard Index Funds

Position value

$61.1M

% of company

1.23%

% of the fund

0.03%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Kiniksa Pharmaceuticals International, PLC and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
JC Julian C. Baker 5%+ holder 13D · 7.0%	3.3M	4.19%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company4.190% Disclosed stake13D · 7.0% View the 13D/G filing →
FJ Felix J. Baker 5%+ holder 13D · 7.0%	3.3M	4.19%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company4.190% Disclosed stake13D · 7.0% View the 13D/G filing →

Julian C. Baker

5%+ holder13D · 7.0%

3.3M

% of company

4.19%

Change vs last qtr

—

Held since

—

Felix J. Baker

5%+ holder13D · 7.0%

3.3M

% of company

4.19%

Change vs last qtr

—

Held since

—

2 more holders behind a free account

See every insider and 5%+ holder of Kiniksa Pharmaceuticals International, PLC.

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