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* Musso Alan A (Last) (First) (Middle) C/O AILERON THERAPEUTICS, INC 738 MAIN STREET #398 (Street) WALTHAM MA 02451 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 10/31/2023	3. Issuer Name and Ticker or Trading Symbol AILERON THERAPEUTICS INC [ ALRN ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner Officer (give title below) Other (specify below)	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)

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
Stock Option (right to buy)	(1)	05/08/2032	Common Stock	17,064	$4.63	D

Explanation of Responses:

1. On October 31, 2023, the Issuer completed its merger with Lung Therapeutics, Inc. (the "Merger") in accordance with the terms of the Agreement and Plan of Merger, dated October 31, 2023. In connection with the Merger, the Issuer assumed the Reporting Person's option to purchase 100,000 shares of Lung Therapeutics, Inc. common stock originally granted on May 9, 2022, which option was converted into an option to purchase 17,064 shares of Issuer common stock. The shares underlying the option vest annually on each anniversary of the grant date until the third anniversary of the grant date, subject to the Reporting Person's continued service with the Issuer on each applicable vesting date.

Remarks:

Exhibit 24.1 Power of Attorney

	/s/ Manuel C. Alves-Aivado, M.D., Ph.D., as attorney-in-fact for Alan Musso	11/02/2023
	** 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).
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