Diamondback Energy insider plans 2,500-share stock sale

Diamondback Energy, Inc. insider Matt Zmigrosky filed to sell 2,500 shares of common stock through Charles Schwab & Co., Inc., with an approximate aggregate market value of $506,930.00, expected around August 14, 2026 on NASDAQ.

Rhea-AI Filing Summary

Diamondback Energy, Inc. insider Matt Zmigrosky filed to sell 2,500 shares of common stock through Charles Schwab & Co., Inc., with an approximate aggregate market value of $506,930.00, expected around August 14, 2026 on NASDAQ. The shares derive from RSU/PSU equity compensation granted on May 28, 2020. In the prior three months, Zmigrosky reported selling 5,000 shares for $1,002,701.00 on June 1, 2026 and 5,000 shares for $1,050,000.00 on June 3, 2026.

Key Figures

Planned shares to be sold: 2,500 shares Planned sale value: $506,930.00 Sale date: 08/14/2026 +4 more

7 metrics

Planned shares to be sold 2,500 shares Common stock to be sold through Charles Schwab & Co., Inc.

Planned sale value $506,930.00 Approximate aggregate market value for the 2,500 planned shares

Sale date 08/14/2026 Approximate date of proposed sale on NASDAQ

Shares sold June 1, 2026 5,000 shares Sold for $1,002,701.00

Proceeds June 1, 2026 $1,002,701.00 Sale of 5,000 shares on 06/01/2026

Shares sold June 3, 2026 5,000 shares Sold for $1,050,000.00

Proceeds June 3, 2026 $1,050,000.00 Sale of 5,000 shares on 06/03/2026

Key Terms

Form 144, RSU / PSU, Equity Compensation

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

RSU / PSU financial

"Common | 05/28/2020 | RSU / PSU - See Remarks"

Equity Compensation financial

"05/28/2020 | Equity Compensation"

Equity compensation is pay given to employees, executives or contractors in the form of company ownership—such as stock, stock options or restricted shares—rather than just cash. It matters to investors because it can align workers' incentives with shareholders (like paying someone in slices of the same pie they help grow), but it also increases the number of shares outstanding and company expenses, affecting ownership percentages and earnings per share.

FAQ

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

What does the Form 144 filing by Matt Zmigrosky mean for Diamondback Energy (FANG)?

The Form 144 indicates planned sales of 2,500 Diamondback Energy shares by Matt Zmigrosky. It also lists 10,000 shares sold in June 2026, providing transparency on recent and upcoming share dispositions.

How many Diamondback Energy (FANG) shares is Matt Zmigrosky planning to sell?

Matt Zmigrosky plans to sell 2,500 shares of Diamondback Energy common stock. The filing shows an approximate aggregate market value of $506,930.00 for this prospective sale, expected to occur around August 14, 2026.

What recent Diamondback Energy (FANG) share sales has Matt Zmigrosky reported?

The filing lists two recent sales: 5,000 shares for $1,002,701.00 on June 1, 2026 and 5,000 shares for $1,050,000.00 on June 3, 2026. These transactions total 10,000 shares sold during the past three months.

What is the origin of the Diamondback Energy (FANG) shares in this Form 144?

The 2,500 shares planned for sale come from RSU/PSU equity compensation granted on May 28, 2020. The filing identifies the source as “RSU / PSU - See Remarks” and categorizes it as Equity Compensation.

Through which broker and market will the Diamondback Energy (FANG) shares be sold?

The planned 2,500-share sale will be handled by Charles Schwab & Co., Inc. at 3000 Schwab Way, Westlake, TX, with the securities listed for trading on NASDAQ as stated in the filing.

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

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Available on EDGAR 08/14/2026 - 04:18 PM Accepted by SEC EDGAR 08/14/2026 - 04:09 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001767328
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Diamondback Energy, Inc.
SEC File Number	001-35700
Address of Issuer	500 WEST TEXAS AVENUE SUITE 100 MIDLAND TEXAS 79701
Phone	432-221-7400
Name of Person for Whose Account the Securities are To Be Sold	Zmigrosky Matt
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Charles Schwab & Co., Inc. 3000 Schwab Way Westlake TX 76262	2500	506930.00	280024353	08/14/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/28/2020	RSU / PSU - See Remarks	Diamondback Energy, Inc.			2500	05/28/2020	Equity Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Matt Zmigrosky 500 WEST TEXAS AVENUE SUITE 100 MIDLAND TX 79701	Diamondback Energy, Inc.	06/01/2026	5000	1002701.00
Matt Zmigrosky 500 WEST TEXAS AVENUE SUITE 100 MIDLAND TX 79701	Diamondback Energy, Inc.	06/03/2026	5000	1050000.00

144: Remarks and Signature

Remarks	The shares sold in this filing were acquired and paid for between 05/28/2020 and 03/01/2022.
Date of Notice	08/14/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Matt Zmigrosky
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)