Kiniksa (KNSA) CMO exercises 2,497 RSUs; 1,208 shares withheld

Rhea-AI Filing Summary

Kiniksa Pharmaceuticals’ chief medical officer John F. Paolini exercised 2,497 Restricted Share Units into Class A Ordinary Shares on April 7, 2026. Of these shares, 1,208 were withheld at $48.94 per share to cover tax obligations, and he now directly holds 65,623 Class A Ordinary Shares. The RSUs come from a grant that vests over four years, with 25% vesting on each anniversary of the April 7, 2022 grant date.

Insider Trade Summary

2,497 shares exercised/converted

Mixed 3 txns

Insider Paolini John F.

Role CHIEF MEDICAL OFFICER

Type	Security	Shares	Price	Value
Exercise	Restricted Share Unit	2,497	$0.00	--
Exercise	Class A Ordinary Share	2,497	$0.00	--
Tax Withholding	Class A Ordinary Share	1,208	$48.94	$59K

Holdings After Transaction: Restricted Share Unit — 0 shares (Direct); Class A Ordinary Share — 66,831 shares (Direct)

Footnotes (1)

1. 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: 2,497 units Shares withheld for taxes: 1,208 shares Tax withholding price: $48.94 per share +2 more

5 metrics

RSUs exercised 2,497 units Converted into Class A Ordinary Shares on April 7, 2026

Shares withheld for taxes 1,208 shares Tax-withholding disposition at $48.94 per share

Tax withholding price $48.94 per share Price used for 1,208 withheld Class A Ordinary Shares

Shares owned after transaction 65,623 shares Direct Class A Ordinary Share holdings post-transaction

RSU vesting schedule 25% per year over 4 years From grant date April 7, 2022

Key Terms

Restricted Share Unit, Class A Ordinary Share, tax-withholding disposition, Exercise or conversion of derivative security, +1 more

5 terms

Restricted Share Unit financial

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

A restricted share unit (RSU) is a promise by a company to give an employee a set number of company shares at a future date, typically after meeting time or performance conditions. For investors, RSUs matter because when they convert into actual shares they increase the number of shares outstanding (like unlocking more tickets in a game), which can dilute existing holders, and they align employee incentives with company performance, influencing behavior and long-term value.

Class A Ordinary Share financial

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

A Class A ordinary share is a type of common stock a company issues that carries a specific set of rights—most often particular voting power, dividend terms, or transfer rules—distinct from other share classes. For investors it matters because those rights affect control over company decisions, how income is paid out, and how easy shares are to buy or sell; think of it like a tiered ticket that gives different access and influence at the same event.

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

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.

Exercise or conversion of derivative security financial

"transaction_code_description": "Exercise or conversion of derivative security""

vesting financial

"The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

Form 4 Insider Transactions: What Each Field Means →

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^*

Paolini John F.

(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 MEDICAL OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/07/2026

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)
			Code	V	Amount	(A) or (D)	Price
Class A Ordinary Share	04/07/2026		M		2,497	A	(1)	66,831	D
Class A Ordinary Share	04/07/2026		F		1,208	D	$48.94	65,623	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Share Unit	(1)	04/07/2026		M			2,497	(2)	(2)	Class A Ordinary Share	2,497	$0	0	D

Explanation of Responses:

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

2. 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)

FAQ

What insider transaction did Kiniksa (KNSA) report for John F. Paolini?

Kiniksa’s chief medical officer John F. Paolini exercised 2,497 Restricted Share Units into Class A Ordinary Shares on April 7, 2026. The filing also shows a related tax-withholding share disposition and his updated share ownership balance after these transactions.

How many Kiniksa (KNSA) RSUs did John F. Paolini convert and into what?

Paolini converted 2,497 Restricted Share Units, each representing a right to receive one Class A Ordinary Share. This derivative exercise turned his RSU award into common equity, increasing his direct share holdings before accounting for tax-withholding share transfers.

How many Kiniksa (KNSA) shares were withheld for John F. Paolini’s taxes?

A total of 1,208 Class A Ordinary Shares were withheld at $48.94 per share to satisfy tax obligations. This is coded as a tax-withholding disposition, not an open-market sale, and reflects standard treatment when equity awards vest or are settled.

How many Kiniksa (KNSA) shares does John F. Paolini own after this transaction?

Following the RSU conversion and related tax withholding, Paolini directly owns 65,623 Class A Ordinary Shares. This figure represents his direct post-transaction holdings, giving context to the relative size of the equity award and associated tax-withholding transfer.

What is the vesting schedule of John F. Paolini’s Kiniksa (KNSA) RSUs?

The RSUs vest over a four-year period, with 25% of the units vesting on each yearly anniversary of the April 7, 2022 grant date. This schedule means the award delivers Class A Ordinary Shares gradually rather than all at once, aligning with long-term service.

Are John F. Paolini’s Kiniksa (KNSA) transactions open-market buys or routine compensation events?

The transactions reflect routine compensation events: an RSU conversion coded as a derivative exercise and a tax-withholding disposition. No open-market purchases or sales are reported, indicating the activity is tied to equity award settlement rather than discretionary trading.