Albemarle COO granted 6,086 stock units

Albemarle’s Chief Operations Officer received a 6,086-share RSU grant that vests fully in 2028, raising his direct holdings to 23,601 shares.

Available on EDGAR 09/16/2026 - 04:18 PM EDT Accepted by SEC EDGAR 09/16/2026 - 04:17 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

ALBEMARLE CORP (symbol: ALB) is the issuer of record for a Form 4 filing submitted to the SEC. Mummert Mark Richard reported acquisition or exercise transactions in this Form 4 filing.

ALBEMARLE CORP (ALB) reported that Chief Operations Officer Mark Richard Mummert received an equity compensation award of 6,086 shares of Common Stock on September 14, 2026. The award consists of Restricted Stock Units that vest 100% on March 14, 2028, subject to the terms of the award agreement, and increases his directly held shares to 23,601.

Insider Trade Summary

Grant/Award: 6,086 shares

Grant/Award 1 txn

Insider Mummert Mark Richard

Role Chief Operations Officer

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	6,086	$0.00	$0.00

Holdings After Transaction: Common Stock — 23,601 shares (Direct)

Holdings Before and After: Common Stock, 17,515 to 23,601 shares (Direct)

Footnotes (1)

1. F1. Restricted Stock Units that vest 100% on 03/14/2028, subject to the terms of the award agreement.

Key Figures

Shares granted: 6,086 shares Shares owned after transaction: 23,601 shares Vesting date: March 14, 2028 +1 more

4 metrics

Shares granted 6,086 shares Restricted Stock Unit grant on September 14, 2026

Shares owned after transaction 23,601 shares Direct Common Stock holdings of COO after grant

Vesting date March 14, 2028 RSUs vest 100% on this date, subject to award terms

Reported price per share $0.0000 per share Compensation award of RSUs, not a market purchase

Key Terms

Restricted Stock Units, vest 100%, award agreement

3 terms

Restricted Stock Units financial

"Restricted Stock Units that vest 100% on 03/14/2028, subject to the terms"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vest 100% financial

"Restricted Stock Units that vest 100% on 03/14/2028, subject to the terms"

award agreement financial

"subject to the terms of the award agreement"

An award agreement is a legal contract that spells out the terms of a pay or equity grant—such as stock options, restricted shares, or cash bonuses—given to an employee, director or consultant. It describes what is being granted, any conditions for keeping it (for example, earning it over time or meeting performance targets), and what happens if the person leaves or breaks rules. Investors care because these agreements affect company costs, potential share dilution and how executives are motivated and rewarded.

FAQ

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

What insider transaction did ALB (Albemarle Corp) disclose for its COO?

Albemarle disclosed that Chief Operations Officer Mark Richard Mummert received a grant of 6,086 shares of Common Stock as Restricted Stock Units on September 14, 2026, classified as a grant or award acquisition rather than a market purchase.

How many ALB shares did the COO hold after the reported Form 4 transaction?

After the grant, Chief Operations Officer Mark Richard Mummert directly held 23,601 shares of Albemarle Common Stock, as reported in the Form 4 following the September 14, 2026 Restricted Stock Unit award.

When do the newly granted Albemarle (ALB) RSUs to the COO vest?

The Restricted Stock Units granted to Albemarle’s Chief Operations Officer vest 100% on March 14, 2028, subject to the terms and conditions set forth in the applicable award agreement.

Was the Albemarle (ALB) COO’s RSU grant made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not checked, and there is no footnote indicating that the September 14, 2026 RSU grant to the Chief Operations Officer was made pursuant to a Rule 10b5-1 trading plan.

Did the Albemarle (ALB) COO pay a price per share for the RSU grant?

No cash price is reported. The Form 4 shows a per-share price of $0.0000 for the 6,086-share Restricted Stock Unit grant, consistent with a compensation award of Common Stock rather than an open-market purchase.

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

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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^*

Mummert Mark Richard

(Last) (First) (Middle)

4250 CONGRESS ST, SUITE 900

SUITE 900

(Street)

CHARLOTTE NORTH CAROLINA 28209

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
ALBEMARLE CORP [ ALB ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/14/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	09/14/2026		A		6,086(1)	A	$0	23,601	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. Restricted Stock Units that vest 100% on 03/14/2028, subject to the terms of the award agreement.

Remarks:

	/s/ Corey E. Tanner, Attorney-in-fact	09/16/2026
	** 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.
* Form 4: SEC 1474 (03-26)