Director at Innospec (IOSP) amends filing after 594-share stock sale

Rhea-AI Filing Summary

Innospec Inc. director David Landless reported selling 594 shares of common stock in two open-market transactions. On February 27, 2026, he sold 287 shares at a weighted average price of $76.30 and 307 shares at a weighted average price of $76.79.

This amended Form 4 corrects the previously reported transaction prices and states that the prices reflect weighted averages. The first sale occurred in multiple trades between $75.5001 and $76.55, and the second between $76.555 and $77.0713. Following these sales, he directly holds 7,632 shares.

Insider Trade Summary

Net Seller: 594 shares ($45,473)

Net Sell 2 txns

Insider LANDLESS DAVID

Role Director

Sold 594 shs ($45K)

Type	Security	Shares	Price	Value
Sale	Common Stock	287	$76.30	$22K
Sale	Common Stock	307	$76.79	$24K

Holdings After Transaction: Common Stock — 7,939 shares (Direct)

Footnotes (1)

1. This Form 4/A amends the Form 4 filed on March 3, 2026 to correct the transaction price reported in Table I. The price reported reflects the weighted average sale price. The shares were sold in multiple transactions at prices ranging from $75.5001 to $76.55. The reporting person undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. This Form 4/A amends the Form 4 filed on March 3, 2026 to correct the transaction price reported in Table I. The price reported reflects the weighted average sale price. The shares were sold in multiple transactions at prices ranging from $76.555 to $77.0713. The reporting person undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

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)
03/03/2026

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		287	D	$76.3(1)	7,939	D
Common Stock	02/27/2026		S		307	D	$76.79(2)	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:

1. This Form 4/A amends the Form 4 filed on March 3, 2026 to correct the transaction price reported in Table I. The price reported reflects the weighted average sale price. The shares were sold in multiple transactions at prices ranging from $75.5001 to $76.55. The reporting person undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

2. This Form 4/A amends the Form 4 filed on March 3, 2026 to correct the transaction price reported in Table I. The price reported reflects the weighted average sale price. The shares were sold in multiple transactions at prices ranging from $76.555 to $77.0713. The reporting person undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

	David Landless	03/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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** 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.
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FAQ

What insider transaction did Innospec (IOSP) director David Landless report?

David Landless reported selling 594 shares of Innospec common stock. The Form 4/A shows two open-market sales on February 27, 2026, and provides corrected weighted average prices and trading ranges for the individual executions making up each reported transaction.

How many Innospec (IOSP) shares did David Landless sell and at what prices?

He sold a total of 594 Innospec shares. One sale covered 287 shares at a weighted average price of $76.30, and the other covered 307 shares at a weighted average price of $76.79, each representing multiple trades within specified price ranges.

What is David Landless’s remaining Innospec (IOSP) shareholding after these sales?

After the reported sales, David Landless directly holds 7,632 Innospec common shares. The filing shows 7,939 shares following the first sale and 7,632 shares following the second, both reflecting his direct ownership position after each respective transaction.

Why was this Innospec (IOSP) Form 4/A amendment filed?

The Form 4/A was filed to correct the transaction prices previously reported. It clarifies that each price shown in Table I is a weighted average sale price and gives the specific price ranges for the multiple trades that comprised each reported sale.

Were the Innospec (IOSP) insider transactions open-market sales or private deals?

The transactions were classified as open-market sales. The filing uses transaction code “S” and describes each as an open-market sale or private transaction, with the reported prices reflecting the weighted average of multiple trades within the stated price ranges.

What price ranges did the Innospec (IOSP) insider sales cover?

The first 287-share sale occurred at prices ranging from $75.5001 to $76.55. The second 307-share sale took place at prices between $76.555 and $77.0713, with each reported transaction price representing a weighted average across those individual executions.