Innospec director granted 1,539 RSUs

INNOSPEC INC. director Elizabeth K. Arnold reported an equity award from the company.

Rhea-AI Filing Summary

INNOSPEC INC. director Elizabeth K. Arnold reported an equity award from the company. She acquired 1,539 Restricted Stock Units (RSUs) at no purchase price as a grant in connection with her service as a non-employee director. These RSUs vest in full on February 23, 2029, meaning they convert into common shares for her at that time if conditions are met. Following this grant, her directly held common stock and RSU-related holdings total 6,376 shares, reflecting routine stock-based compensation rather than an open-market purchase or sale.

Insider Trade Summary

Grant/Award: 1,539 shares

Grant/Award 1 txn

Insider Arnold Elizabeth K

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	1,539	$0.00	$0.00

Holdings After Transaction: Common Stock — 6,376 shares (Direct)

Footnotes (1)

1. F1. 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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Innospec (IOSP) disclose in this Form 4 filing?

Innospec (IOSP) disclosed that director Elizabeth K. Arnold received 1,539 Restricted Stock Units as an equity award. The grant is compensation for her role as a non-employee director and was not an open-market stock purchase or sale.

How many Innospec (IOSP) RSUs were granted to director Elizabeth K. Arnold?

Elizabeth K. Arnold was granted 1,539 Restricted Stock Units tied to Innospec common stock. These units represent a stock-based compensation award rather than cash, increasing her potential future share ownership once the RSUs vest and convert into common shares.

When do Elizabeth K. Arnold’s Innospec (IOSP) RSUs vest?

The 1,539 Restricted Stock Units granted to Elizabeth K. Arnold vest in full on February 23, 2029. On that vesting date, the RSUs are scheduled to convert into Innospec common shares, assuming continued eligibility and satisfaction of applicable conditions.

Did the Innospec (IOSP) director buy or sell shares in the market?

The director did not buy or sell shares in the open market. Instead, she received 1,539 Restricted Stock Units as a grant with a reported price of $0.00 per unit, reflecting non-cash equity compensation granted by the company’s board.

What is Elizabeth K. Arnold’s total Innospec (IOSP) share ownership after this grant?

After the grant, Elizabeth K. Arnold’s directly held Innospec-related holdings total 6,376 common shares. This figure includes the impact of the newly awarded 1,539 Restricted Stock Units, which are scheduled to vest and convert into shares on February 23, 2029.

Why did Innospec (IOSP) grant RSUs to its non-employee director?

The RSUs were granted to compensate Elizabeth K. Arnold for her service as a non-employee director of Innospec. Companies commonly use restricted stock units to align director compensation with shareholder interests through long-term equity-based incentives rather than solely cash fees.

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

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Accepted by SEC EDGAR 02/25/2026 - 05:26 PM Learn about SEC filing dates

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^*

Arnold Elizabeth K

(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)
02/23/2026

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	02/23/2026		A		1,539(1)	A	$0.00	6,376	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

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.

	Elizabeth K Arnold	02/25/2026
	** 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.