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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Ingelsson Erik (Last) (First) (Middle) C/O WAVE LIFE SCIENCES LTD., 733 CONCORD AVE. (Street) CAMBRIDGE MA 02138 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 04/09/2026	3. Issuer Name and Ticker or Trading Symbol Wave Life Sciences Ltd. [ WVE ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Chief Scientific Officer	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares	87,864(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Share Option (Right to Buy)	(2)	05/08/2034	Ordinary Shares	350,000	$5.85	D
Share Option (Right to Buy)	(3)	02/04/2035	Ordinary Shares	200,000	$11.74	D
Share Option (Right to Buy)	(4)	02/05/2036	Ordinary Shares	273,750	$12.75	D

Explanation of Responses:

1. Consists of (i) 17,489 ordinary shares, (ii) 24,750 RSUs that vest in three equal annual installments on February 8, 2027 through February 8, 2029; and (iii) 45,625 RSUs that vest in four equal annual installments of 25% beginning on February 8, 2027 through February 8, 2030, subject to the Reporting Person's continued service through the applicable vesting date.

2. The option vested as to 25% of the shares on May 8, 2025, and vests as to an additional 6.25% of the shares quarterly thereafter until May 8, 2028, subject to the Reporting Person's continued service through the applicable vesting date.

3. The option vested as to 25% of the shares on February 8, 2026, and vests as to an additional 6.25% of the shares quarterly thereafter until February 8, 2029, subject to the Reporting Person's continued service through the applicable vesting date.

4. The option vests as to 25% of the shares on February 8, 2027, and vests as to an additional 6.25% of the shares quarterly thereafter until February 8, 2030, subject to the Reporting Person's continued service through the applicable vesting date.

Remarks:

Exhibit 24.1 - Power of Attorney

	/s/ Erik Ingelsson	04/17/2026
	** 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 5 (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.