Kiniksa (KNSA) COO executes RSU exercise and 2,367-share sale under 10b5-1 plan

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Kiniksa Pharmaceuticals International, plc chief operating officer Ross Moat reported a series of equity transactions involving Class A Ordinary Shares. On April 7, 2026, he exercised 2,477 Restricted Share Units, receiving an equal number of Class A Ordinary Shares as the RSUs converted one-for-one.

On the same date, 774 shares were disposed of at $48.94 per share to cover tax obligations related to the equity award, a non-market tax-withholding transaction. On April 6, 2026, he completed an open‑market sale of 2,367 Class A Ordinary Shares at $48.58 per share under a pre‑arranged Rule 10b5‑1 trading plan. Following these transactions, he directly holds 12,029 Class A Ordinary Shares.

Insider Trade Summary 10b5-1

Net Seller: 2,367 shares ($114,989)

Net Sell 4 txns

Insider Moat Ross

Role CHIEF OPERATING OFFICER

Sold 2,367 shs ($115K)

Type	Security	Shares	Price	Value
Exercise	Restricted Share Unit	2,477	$0.00	--
Exercise	Class A Ordinary Share	2,477	$0.00	--
Tax Withholding	Class A Ordinary Share	774	$48.94	$38K
Sale	Class A Ordinary Share	2,367	$48.58	$115K

Holdings After Transaction: Restricted Share Unit — 0 shares (Direct); Class A Ordinary Share — 14,506 shares (Direct)

Footnotes (1)

This transaction was effected pursuant to a 10b5-1 plan executed by the reporting person on November 13, 2024. Each Restricted Share Unit (RSU) represents a contingent right to receive one Class A Ordinary Share of the Issuer. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of grant, April 7, 2022.

Key Figures

RSUs exercised: 2,477 units Tax-withholding shares: 774 shares at $48.94 Open-market sale: 2,367 shares at $48.58 +2 more

5 metrics

RSUs exercised 2,477 units RSUs converted into Class A Ordinary Shares on April 7, 2026

Tax-withholding shares 774 shares at $48.94 Shares disposed to satisfy tax obligations on April 7, 2026

Open-market sale 2,367 shares at $48.58 Sale of Class A Ordinary Shares on April 6, 2026

Shares held after transactions 12,029 shares Direct Class A Ordinary Share holdings following reported transactions

RSU-to-share ratio 1 RSU : 1 share Each RSU represents one Class A Ordinary Share of the issuer

Key Terms

Restricted Share Unit, Rule 10b5-1 plan, tax-withholding disposition, derivative exercise/conversion

4 terms

Rule 10b5-1 plan regulatory

"This transaction was effected pursuant to a 10b5-1 plan executed by the reporting person"

A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.

tax-withholding disposition financial

"Payment of exercise price or tax liability by delivering securities"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

derivative exercise/conversion financial

"transaction_action: derivative exercise/conversion"

Form 4 Insider Transactions: What Each Field Means →

04/08/2026 - 04:39 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Moat Ross

(Last)

(First)

(Middle)

C/O KINIKSA PHARMACEUTICALS INT'L

105 PICCADILLY, SECOND FLOOR

(Street)

LONDON

W1J 7NJ

(City)

(State)

(Zip)

UNITED KINGDOM

(Country)

2. Issuer Name and Ticker or Trading Symbol
Kiniksa Pharmaceuticals International, plc [ KNSA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	CHIEF OPERATING OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/06/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Ordinary Share	04/06/2026		S⁽¹⁾		2,367	D	$48.58	12,029	D
Class A Ordinary Share	04/07/2026		M		2,477	A	⁽²⁾	14,506	D
Class A Ordinary Share	04/07/2026		F		774	D	$48.94	13,732	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Share Unit	⁽²⁾	04/07/2026		M			2,477	⁽³⁾	⁽³⁾	Class A Ordinary Share	2,477	$0	0	D

Explanation of Responses:

1. This transaction was effected pursuant to a 10b5-1 plan executed by the reporting person on November 13, 2024.

2. Each Restricted Share Unit (RSU) represents a contingent right to receive one Class A Ordinary Share of the Issuer.

3. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of grant, April 7, 2022.

	/s/ Douglas Barry, Attorney-in-Fact	04/08/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transactions did Kiniksa (KNSA) COO Ross Moat report?

Ross Moat reported exercising 2,477 RSUs into Class A Ordinary Shares, a tax-withholding disposition of 774 shares, and an open-market sale of 2,367 shares. These transactions reflect compensation-related equity activity combined with a pre-planned share sale.

How many Kiniksa (KNSA) shares did the COO sell in the market?

Ross Moat sold 2,367 Class A Ordinary Shares in an open-market transaction at $48.58 per share. This sale was executed on April 6, 2026 pursuant to a pre-arranged Rule 10b5-1 trading plan disclosed in the filing’s footnotes.

What equity awards did the Kiniksa (KNSA) COO exercise in this Form 4?

He exercised 2,477 Restricted Share Units, each representing a contingent right to receive one Class A Ordinary Share. The RSUs vest over four years, with 25% vesting on each anniversary of the April 7, 2022 grant date.

How many Kiniksa (KNSA) shares were withheld for taxes in this filing?

The filing shows 774 Class A Ordinary Shares disposed of at $48.94 per share to satisfy tax obligations. This tax-withholding disposition is not an open-market sale but a mechanism to cover taxes due on the vested equity award.

What are the Kiniksa (KNSA) COO’s holdings after these transactions?

After completing the exercise, tax withholding, and open-market sale, Ross Moat directly holds 12,029 Class A Ordinary Shares. This post-transaction figure reflects his remaining direct equity stake reported in the Form 4.

Was the Kiniksa (KNSA) insider sale part of a Rule 10b5-1 trading plan?

Yes. A footnote states the transaction was effected under a Rule 10b5-1 plan executed on November 13, 2024. Such plans pre-schedule trades, indicating the timing of the April 6, 2026 sale was determined in advance.