Diamondback insider sells 25,000 shares in Form 144

Diamondback Energy, Inc. reported Form 144 sale notices for shares owned by Matt Zmigrosky.

Rhea-AI Filing Summary

Diamondback Energy, Inc. reported Form 144 sale notices for shares owned by Matt Zmigrosky. The filing lists a sale of 20,899 shares on 03/13/2026 with proceeds of $3,761,877.00 and a sale of 4,101 shares on 03/18/2026 with proceeds of $781,293.00. The filing also references 15,000 RSU/PSU dated 03/01/2025.

Insights

Securities Attorney

Rule 144 notices document reported insider sales and equity awards for compliance, not an offering.

Form 144 entries show reported dispositions by an affiliate, including 20,899 shares on 03/13/2026 and 4,101 shares on 03/18/2026, with proceeds of $3,761,877.00 and $781,293.00 respectively. These entries record the brokered sales required for compliance under resale rules.

Timing and method details appear as sale dates; the filing also lists 15,000 RSU/PSU dated 03/01/2025. Cash‑flow counterparties and any transfer restrictions are not stated in the excerpt; subsequent filings or broker records would show settlement details.

Key Figures

Sale - 03/13/2026: 20,899 shares Proceeds - 03/13/2026: $3,761,877.00 Sale - 03/18/2026: 4,101 shares +2 more

5 metrics

Sale - 03/13/2026 20,899 shares sale reported on 03/13/2026

Proceeds - 03/13/2026 $3,761,877.00 proceeds from 20,899-share sale

Sale - 03/18/2026 4,101 shares sale reported on 03/18/2026

Proceeds - 03/18/2026 $781,293.00 proceeds from 4,101-share sale

RSU/PSU awards 15,000 units RSU / PSU dated 03/01/2025

Key Terms

Form 144, RSU / PSU, Proceeds

3 terms

Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

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 | 03/01/2025 | RSU / PSU - See Remarks"

Proceeds financial

"03/13/2026 | 20899 | 3761877.00"

FAQ

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

What sales does the Form 144 list for Diamondback Energy (FANG)?

The Form 144 lists reported sales of 20,899 shares on 03/13/2026 and 4,101 shares on 03/18/2026, with proceeds of $3,761,877.00 and $781,293.00 respectively.

Who is the reporting party on the Form 144 for FANG?

The reporting party named in the excerpt is Matt Zmigrosky, with an address listed in Midland, Texas, associated with the reported transactions for Diamondback Energy, Inc.

Does the filing show equity awards tied to these shares?

The excerpt references 15,000 RSU / PSU dated 03/01/2025, indicating restricted stock unit or performance stock unit awards are listed in the filing content.

Do the Form 144 entries indicate who received the sale proceeds?

The excerpt shows the proceeds amounts ($3,761,877.00 and $781,293.00) but does not state who received the proceeds or whether proceeds went to the issuer or selling holder.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 05/13/2026 - 04:07 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	15000	3001502.00	281313297	05/13/2026	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	03/01/2025	RSU / PSU - See Remarks	Diamondback Energy, Inc.			15000	03/01/2025	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.	03/13/2026	20899	3761877.00
Matt Zmigrosky 500 WEST TEXAS AVENUE SUITE 100 MIDLAND TX 79701	Diamondback Energy, Inc.	03/18/2026	4101	781293.00

144: Remarks and Signature

Remarks	The shares reported in this filing may be sold over various dates.
Date of Notice	05/13/2026
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)