Innospec (IOSP) director reports RSU grant, option exercise and share sale

Rhea-AI Filing Summary

Innospec director Milton C. Blackmore reported a mix of equity awards, option exercises, and share sales. He received 1,539 restricted stock units that vest in full on February 23, 2029 as compensation for his service as a non-employee director. On February 20, 2026, he exercised stock options for 1,030 shares of common stock at $44.18 per share and sold 1,030 shares of common stock in an open-market transaction at an average price of $81.8409 per share. After these transactions, his directly held common stock, including RSUs, was reported at 11,124 shares.

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^*

Blackmore Milton C

(Last) (First) (Middle)

8310 SOUTH VALLEY HIGHWAY

SUITE 350

(Street)

ENGLEWOOD CO 80112

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
INNOSPEC INC. [ IOSP ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
02/20/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/20/2026		M		1,030	A	$44.18	10,615	D
Common Stock	02/20/2026		S		1,030	D	$81.8409	9,585	D
Common Stock	02/23/2026		A		1,539(1)	A	$0.00	11,124	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
Stock Option	$44.18	02/20/2026		M			1,030	02/22/2019	02/22/2026	Common Stock	1,030	$0.00	0	D

Explanation of Responses:

1. Represents Restricted Stock Units ("RSUs") vesting in full on February 23, 2029, granted by Issuer in connection with Reporting Person's service as a non-employee director.

	Milton C. Blackmore	02/24/2026
	** 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.

FAQ

What insider transactions did Innospec (IOSP) director Milton C. Blackmore report?

Milton C. Blackmore reported a grant of 1,539 restricted stock units, an option exercise for 1,030 common shares at $44.18 per share, and an open-market sale of 1,030 common shares at an average price of $81.8409 per share, all in February 2026.

How large was Milton C. Blackmore’s stock sale in Innospec (IOSP)?

He sold 1,030 shares of Innospec common stock in an open-market transaction at an average price of $81.8409 per share. This sale followed the exercise of stock options for the same number of shares, effectively turning the option position into cash while maintaining other holdings.

What restricted stock units did Milton C. Blackmore receive from Innospec (IOSP)?

He received 1,539 restricted stock units that vest in full on February 23, 2029. The award was granted in connection with his service as a non-employee director, representing equity-based compensation that will convert into shares if he meets the vesting conditions.

When do Milton C. Blackmore’s Innospec (IOSP) RSUs vest?

His 1,539 restricted stock units are scheduled to vest in full on February 23, 2029. Until that vesting date, the RSUs function as a promise of future shares tied to his continued service as a non-employee director at Innospec.

How many Innospec (IOSP) shares did Milton C. Blackmore own after these transactions?

After the reported February 2026 transactions, his direct holdings were reported at 11,124 shares of common stock. This figure reflects his position following the stock option exercise, related share sale, and the new restricted stock unit grant disclosed in the filing.

Was Milton C. Blackmore’s Innospec (IOSP) transaction a net buy or net sell of shares?

The reported activity combined acquisitions and a sale, resulting in a net sale of 1,030 shares based on open-market selling. However, he also received 1,539 restricted stock units and exercised options for 1,030 shares, increasing his overall equity-linked exposure despite the sale.