Diamondback Energy, Inc.·4

May 21, 5:57 PM ET

Mains Stephanie K. 4

4 · Diamondback Energy, Inc. · Filed May 21, 2026

Research Summary

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Diamondback Energy Director Stephanie Mains Receives 982 RSUs

What Happened
Stephanie K. Mains, a non-employee director of Diamondback Energy, received a grant of 982 restricted stock units (RSUs) on 2026-05-20. The Form 4 reports an acquisition (transaction code A) at $0.00 per share (awarded, not purchased), total reported value $0 on the filing date. This is a compensation award rather than an open-market purchase or sale.

Key Details

  • Transaction date and type: 2026-05-20 — Award/Grant of 982 RSUs (code A).
  • Reported price: $0.00 per unit; total reported acquisition value $0 (award).
  • Vesting: RSUs vest on the earlier of the one-year anniversary of the grant or the 2027 annual meeting of stockholders (per footnote).
  • Shares owned after transaction: Not disclosed in the supplied filing details.
  • Filing timeliness: Form filed 2026-05-21 for a 2026-05-20 transaction — within the typical Section 16 reporting window (timely).
  • Footnote: RSUs represent a contingent right to receive one common share each upon vesting.

Context
RSU grants to non-employee directors are routine compensation and don't reflect an immediate purchase or sale. These RSUs will convert to actual shares only if and when they vest under the stated schedule, at which point tax withholding or other withholding-related share transfers may occur and be reported separately.

Insider Transaction Report

Form 4
Period: 2026-05-20
Transactions
  • Award

    Common Stock

    [F1]
    2026-05-20+98211,635 total
Footnotes (1)
  • [F1]These securities are restricted stock units, each representing a contingent right to receive one share of common stock, par value $0.01 per share, of the issuer. These restricted stock units were granted to Ms. Mains as an annual non-employee director grant under the issuer's equity incentive plan and will vest on the earlier of the one-year anniversary of the date of grant and the date of the 2027 annual meeting of stockholders of the issuer.
Signature
/s/ Matt Zmigrosky, as attorney-in-fact for Stephanie K. Mains|2026-05-21

Documents

1 file
  • 4
    wk-form4_1779400673.xmlPrimary

    FORM 4