Innospec (IOSP) director sells 594 common shares

Rhea-AI Filing Summary

Innospec Inc. director David Landless reported an open-market sale of 594 shares of Innospec common stock at an average price of $76.5562 per share on February 27, 2026. After this transaction, he directly holds 7,632 shares of the company’s common stock.

Insider Trade Summary

Net Seller: 594 shares ($45,474)

Net Sell 1 txn

Insider LANDLESS DAVID

Role Director

Sold 594 shs ($45K)

Type	Security	Shares	Price	Value
Sale	Common Stock	594	$76.5562	$45K

Holdings After Transaction: Common Stock — 7,632 shares (Direct)

Footnotes (1)

Form 4 Insider Transactions: What Each Field Means →

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^*

LANDLESS DAVID

(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)
02/27/2026

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	02/27/2026		S		594	D	$76.5562	7,632	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:

	David Landless	03/03/2026
	** 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 transaction did IOSP report for director David Landless?

Innospec Inc. reported that director David Landless sold 594 shares of common stock in an open-market transaction. The shares were sold at an average price of $76.5562 per share on February 27, 2026, as disclosed in the Form 4 filing.

How many IOSP shares did David Landless sell and at what price?

Director David Landless sold 594 shares of Innospec common stock. The transaction was executed at an average price of $76.5562 per share in an open-market sale, according to the Form 4 filed for Innospec Inc. (IOSP).

How many IOSP shares does David Landless hold after this Form 4 transaction?

After the reported sale, David Landless directly holds 7,632 shares of Innospec Inc. common stock. This post-transaction ownership figure is disclosed in the Form 4 as the total shares beneficially owned following the open-market sale.

Was the IOSP insider transaction a buy or sell by David Landless?

The Form 4 shows a sale by director David Landless. It is classified as an open-market disposition of 594 shares of Innospec common stock, with the transaction coded “S” for a sale in open market or private transaction.

Is David Landless’s IOSP stock ownership direct or indirect after the sale?

The filing indicates direct ownership by David Landless after the transaction. The 7,632 shares reported as owned following the sale are coded as directly held, with no additional nature-of-ownership footnote provided in the Form 4 data.