SEC FORM 4

SEC FORM 4 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

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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^*

Detheux Michel

(Last)

(First)

(Middle)

C/O ITEOS THERAPEUTICS, INC.

321 ARSENAL STREET

(Street)

WATERTOWN

02472

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
iTeos Therapeutics, Inc. [ ITOS ]

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

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
06/04/2025

4. 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 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)
Common Stock	06/04/2025		M⁽¹⁾		8,400	A	$4.3	144,303	D
Common Stock	06/04/2025		S⁽¹⁾		8,400	D	$10.1⁽²⁾	135,903	D
Common Stock	06/04/2025		M⁽¹⁾		43,883	A	$4.3	43,883	I	By MG3A⁽³⁾
Common Stock	06/04/2025		S⁽¹⁾		43,883	D	$10.1⁽⁴⁾	0	I	By MG3A⁽³⁾
Common Stock	06/05/2025		M⁽¹⁾		8,400	A	$4.3	144,303	D
Common Stock	06/05/2025		S⁽¹⁾		8,400	D	$10.15⁽⁵⁾	135,903	D
Common Stock	06/05/2025		M⁽¹⁾		43,882	A	$4.3	43,882	I	By MG3A⁽³⁾
Common Stock	06/05/2025		S⁽¹⁾		43,882	D	$10.15⁽⁵⁾	0	I	By MG3A⁽³⁾
Common Stock	06/06/2025		M⁽¹⁾		8,400	A	$4.3	144,303	D
Common Stock	06/06/2025		S⁽¹⁾		8,400	D	$10.21⁽⁶⁾	135,903	D
Common Stock	06/06/2025		M⁽¹⁾		43,882	A	$4.3	43,882	I	By MG3A⁽³⁾
Common Stock	06/06/2025		S⁽¹⁾		43,882	D	$10.21⁽⁶⁾	0	I	By MG3A⁽³⁾

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)
Stock Option (Right to Buy)	$4.3	06/04/2025		M⁽¹⁾			8,400	07/01/2022	06/11/2025	Common Stock	8,400	$0	51,600	D
Stock Option (Right to Buy)	$4.3	06/04/2025		M⁽¹⁾			43,883	07/01/2022	06/11/2025	Common Stock	43,883	$0	269,559	I	By MG3A⁽³⁾
Stock Option (Right to Buy)	$4.3	06/05/2025		M⁽¹⁾			8,400	07/01/2022	06/11/2025	Common Stock	8,400	$0	43,200	D
Stock Option (Right to Buy)	$4.3	06/05/2025		M⁽¹⁾			43,882	07/01/2022	06/11/2025	Common Stock	43,882	$0	225,677	I	By MG3A⁽³⁾
Stock Option (Right to Buy)	$4.3	06/06/2025		M⁽¹⁾			8,400	07/01/2022	06/11/2025	Common Stock	8,400	$0	34,800	D
Stock Option (Right to Buy)	$4.3	06/06/2025		M⁽¹⁾			43,882	07/01/2022	06/11/2025	Common Stock	43,882	$0	181,795	I	By MG3A⁽³⁾

Explanation of Responses:

1. The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2025.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.00 to $10.20, inclusive. The reporting person undertakes to provide to iTeos Therapeutics, Inc., any security holder of iTeos Therapeutics, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

3. MG3A is a Belgian partnership of which the reporting person is the manager and the reporting person's spouse is the successor manager.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.01 to $10.21, inclusive. The reporting person undertakes to provide to iTeos Therapeutics, Inc., any security holder of iTeos Therapeutics, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.08 to $10.22, inclusive. The reporting person undertakes to provide to iTeos Therapeutics, Inc., any security holder of iTeos Therapeutics, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.15 to $10.31, inclusive. The reporting person undertakes to provide to iTeos Therapeutics, Inc., any security holder of iTeos Therapeutics, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

	/s/ Adi Osovsky, as Attorney-in-Fact	06/06/2025
	** 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).
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