[Form 4] Kiniksa Pharmaceuticals International, plc Insider Trading Activity

Rhea-AI Filing Summary

Kiniksa Pharmaceuticals International, plc Chief Strategy Officer Eben Tessari reported several equity compensation transactions. On April 1, 2026, Tessari received a grant of 33,200 share options for Class A Ordinary Shares at an exercise price of $48.13 per share, expiring on March 31, 2036. The option vests 25% on April 1, 2027, then in 36 monthly installments.

On the same date, Tessari was granted 8,300 Restricted Share Units (RSUs) and 16,600 Performance Share Units (PSUs), each tied to Class A Ordinary Shares. The RSUs vest over four years, with 25% vesting on April 1, 2026 and annually thereafter. The PSUs convert into up to 200% of one share each, based on performance, no later than January 30, 2028.

Also on April 1, 2026, previously granted RSUs vested and were settled into 5,975 Class A Ordinary Shares. Of these, 1,756 shares were withheld at $48.13 per share to satisfy tax obligations, a non‑market disposition, leaving Tessari with 21,250 Class A Ordinary Shares held directly after the transactions. Earlier, on January 15, 2026, Tessari acquired 365 shares at $24.16 per share through the company’s 2018 Employee Share Purchase Plan, an acquisition exempt under Rule 16b‑3(e).

Insider Trade Summary

Net Buyer: 4,584 shares

Net Buy 9 txns

Insider Tessari Eben

Role CHIEF STRATEGY OFFICER

Type	Security	Shares	Price	Value
Grant/Award	Share Option	33,200	$0.00	--
Grant/Award	Restricted Share Unit	8,300	$0.00	--
Grant/Award	Performance Share Unit	16,600	$0.00	--
Exercise	Restricted Share Unit	1,773	$0.00	--
Exercise	Restricted Share Unit	1,745	$0.00	--
Exercise	Restricted Share Unit	2,457	$0.00	--
Exercise	Class A Ordinary Share	5,975	$0.00	--
Tax Withholding	Class A Ordinary Share	1,756	$48.13	$85K
Grant/Award	Class A Ordinary Share	365	$24.16	$9K

Holdings After Transaction: Share Option — 33,200 shares (Direct); Restricted Share Unit — 20,933 shares (Direct); Performance Share Unit — 16,600 shares (Direct); Class A Ordinary Share — 21,250 shares (Direct)

Footnotes (1)

1. The reporting person is voluntarily reporting the acquisition of these shares pursuant to the Issuer's 2018 Employee Share Purchase Plan for the purchase period of July 16, 2025 to January 15, 2026. The acquisition of these shares was exempt pursuant to Rule 16b-3(e). Each Restricted Share Unit (RSU) represents a contingent right to receive one Class A Ordinary Share of the Issuer. The option vests and becomes exercisable as to 25% of the total grant on the first anniversary of the vesting commencement date and vests in 36 equal monthly installments thereafter. The vesting commencement date is April1, 2026. The RSUs vest over a four-year period, with 25% of the RSUs vesting on the vesting commencement date of April 1, 2026, and each yearly anniversary thereafter. Each Performance Share Unit (PSU) represents a contingent right to receive a number of Class A Ordinary Shares of the Issuer based upon the achievement of certain pre-established performance criteria, as certified by the Issuer's Compensation Committee. Unless earlier forfeited, each PSU vests and converts into not more than 200% of one Class A Ordinary Share of the Issuer no later than January 30, 2028, unless such date falls on a non-business date, in which case the next business date shall apply. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of the grant, April 1, 2023. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of the grant, April 1, 2024. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of the grant, April 1, 2025.

Key Figures

Option grant: 33,200 options at $48.13 RSU grant: 8,300 RSUs PSU grant: 16,600 PSUs +4 more

7 metrics

Option grant 33,200 options at $48.13 Share options for Class A Ordinary Shares, expire March 31, 2036

RSU grant 8,300 RSUs Grant dated April 1, 2026, vests 25% yearly over four years

PSU grant 16,600 PSUs Each PSU may convert into up to 200% of one share by January 30, 2028

RSUs settled 5,975 shares Class A Ordinary Shares received from RSU exercises on April 1, 2026

Tax withholding shares 1,756 shares at $48.13 Shares withheld to satisfy tax liabilities on April 1, 2026

Shares held after 21,250 shares Direct Class A Ordinary Share holdings after April 1, 2026 transactions

ESPP acquisition 365 shares at $24.16 Employee Share Purchase Plan acquisition on January 15, 2026

Key Terms

Restricted Share Unit, Performance Share Unit, Employee Share Purchase Plan, Rule 16b-3(e), +1 more

5 terms

Restricted Share Unit financial

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

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.

Performance Share Unit financial

"Each Performance Share Unit (PSU) represents a contingent right to receive a number of Class A Ordinary Shares"

A performance share unit (PSU) is a form of executive or employee pay that promises shares (or the cash value of shares) only if the company meets specific performance targets over a set period. Think of it like a bonus cheque that only arrives if the company hits agreed goals — it aligns managers’ rewards with business results and signals to investors how leadership is being incentivized to grow value over time.

Employee Share Purchase Plan financial

"pursuant to the Issuer's 2018 Employee Share Purchase Plan for the purchase period"

A program that lets employees buy their employer’s stock, often through regular payroll deductions and sometimes at a discounted price or with matching contributions; think of it as a company-run savings plan that converts part of pay into ownership. It matters to investors because it can increase insider ownership and employee motivation, potentially affecting company performance, and can slightly change share supply when new stock is issued or sold.

Rule 16b-3(e) regulatory

"The acquisition of these shares was exempt pursuant to Rule 16b-3(e)."

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.

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 04/03/2026 - 04:41 PM Learn about SEC filing dates

FAQ

What equity awards did Eben Tessari receive from Kiniksa (KNSA) on April 1, 2026?

On April 1, 2026, Eben Tessari received 33,200 share options, 8,300 Restricted Share Units, and 16,600 Performance Share Units, all tied to Kiniksa Class A Ordinary Shares. These awards vest over time based on service and, for PSUs, performance criteria.

How do Eben Tessari’s new Kiniksa (KNSA) options and RSUs vest?

The 33,200 options vest 25% on April 1, 2027, then in 36 monthly installments. The 8,300 RSUs vest over four years, with 25% vesting on April 1, 2026 and on each yearly anniversary, aligning compensation with multi‑year service at Kiniksa.

What are the terms of Eben Tessari’s Performance Share Units at Kiniksa (KNSA)?

Each Performance Share Unit represents a right to receive Kiniksa Class A Ordinary Shares based on pre‑set performance criteria. Vesting occurs no later than January 30, 2028, and each PSU can convert into up to 200% of one share, depending on achieved performance.

How many Kiniksa (KNSA) shares did Eben Tessari hold after the reported transactions?

After the April 1, 2026 transactions, Eben Tessari held 21,250 Kiniksa Class A Ordinary Shares directly. This reflects settlement of vested RSUs into 5,975 shares and withholding of 1,756 shares to cover tax obligations at $48.13 per share.

Was there any open‑market buying or selling by Eben Tessari in this Kiniksa (KNSA) filing?

The filing shows grants of options, RSUs, PSUs, RSU vesting, and 1,756 shares withheld for taxes. It does not report open‑market purchases or sales; the tax withholding disposition is a non‑market mechanism to satisfy tax liabilities on equity compensation.

What shares did Eben Tessari acquire through Kiniksa’s Employee Share Purchase Plan?

For the purchase period July 16, 2025 to January 15, 2026, Tessari voluntarily reported acquiring 365 Kiniksa Class A Ordinary Shares at $24.16 per share under the 2018 Employee Share Purchase Plan. This acquisition was exempt under Rule 16b‑3(e) for insider transactions.

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^*

Tessari Eben

(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 STRATEGY OFFICER

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
01/15/2026

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	01/15/2026		A(1)		365	A	$24.16	17,031	D
Class A Ordinary Share	04/01/2026		M		5,975	A	(2)	23,006	D
Class A Ordinary Share	04/01/2026		F		1,756	D	$48.13	21,250	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
Share Option	$48.13	04/01/2026		A		33,200		(3)	03/31/2036	Class A Ordinary Share	33,200	$0	33,200	D
Restricted Share Unit	(2)	04/01/2026		A		8,300		(4)	(4)	Class A Ordinary Share	8,300	$0	8,300	D
Performance Share Unit	(5)	04/01/2026		A		16,600		(6)	(6)	Class A Ordinary Share	16,600	$0	16,600	D
Restricted Share Unit	(2)	04/01/2026		M			1,773	(7)	(7)	Class A Ordinary Share	1,773	$0	1,772	D
Restricted Share Unit	(2)	04/01/2026		M			1,745	(8)	(8)	Class A Ordinary Share	1,745	$0	3,490	D
Restricted Share Unit	(2)	04/01/2026		M			2,457	(9)	(9)	Class A Ordinary Share	2,457	$0	7,371	D

Explanation of Responses:

1. The reporting person is voluntarily reporting the acquisition of these shares pursuant to the Issuer's 2018 Employee Share Purchase Plan for the purchase period of July 16, 2025 to January 15, 2026. The acquisition of these shares was exempt pursuant to Rule 16b-3(e).

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

3. The option vests and becomes exercisable as to 25% of the total grant on the first anniversary of the vesting commencement date and vests in 36 equal monthly installments thereafter. The vesting commencement date is April1, 2026.

4. The RSUs vest over a four-year period, with 25% of the RSUs vesting on the vesting commencement date of April 1, 2026, and each yearly anniversary thereafter.

5. Each Performance Share Unit (PSU) represents a contingent right to receive a number of Class A Ordinary Shares of the Issuer based upon the achievement of certain pre-established performance criteria, as certified by the Issuer's Compensation Committee.

6. Unless earlier forfeited, each PSU vests and converts into not more than 200% of one Class A Ordinary Share of the Issuer no later than January 30, 2028, unless such date falls on a non-business date, in which case the next business date shall apply.

7. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of the grant, April 1, 2023.

8. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of the grant, April 1, 2024.

9. The RSUs vest over a four-year period, with 25% of the RSUs vesting on each yearly anniversary of the date of the grant, April 1, 2025.

	/s/ Douglas Barry, Attorney-in-Fact	04/03/2026
	** 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)