X0306 4 2019-04-23 0 0001745797 Brigham Minerals, Inc. MNRL 0001370287 Keenan W Howard JR 410 PARK AVENUE, 19TH FLOOR NEW YORK NY 10022 1 0 0 0 Class A Common Stock 2019-04-23 4 A 0 8274 0.00 A 8274 D Class B Common Stock 2019-04-23 4 A 0 1402421 0.00 A 1402421 I See footnote Class B Common Stock 2019-04-23 4 A 0 3485695 0.00 A 3485695 I See footnote Class B Common Stock 2019-04-23 4 A 0 339593 0.00 A 339593 I See footnote Class B Common Stock 2019-04-23 4 A 0 2797554 0.00 A 2797554 I See footnote Brigham Minerals Holdings, LLC Units 0.00 2019-04-23 4 A 0 1402421 0.00 A Class A Common Stock 1402421 1402421 I See footnote Brigham Minerals Holdings, LLC Units 0.00 2019-04-23 4 A 0 3485695 0.00 A Class A Common Stock 3485695 3485695 I See footnote Brigham Minerals Holdings, LLC Units 0.00 2019-04-23 4 A 0 339593 0.00 A Class A Common Stock 339593 339593 I See footnote Brigham Minerals Holdings, LLC Units 0.00 2019-04-23 4 A 0 2797554 0.00 A Class A Common Stock 2797554 2797554 I See footnote Award of restricted stock units pursuant to the Brigham Minerals, Inc. 2019 Long Term Incentive Plan. The award vests in full on the first anniversary of the grant date, subject to continued employment through the vesting date. Each share of Class B common stock has no economic rights but entitles its holder to one vote on all matters to be voted on by shareholders generally. Upon closing of the initial public offering (the "Offering") of Brigham Minerals, Inc. (the "Issuer"), (i) the Limited Liability Company Agreement of Brigham Minerals Holdings, LLC ("Brigham LLC") was amended and restated (as amended and restated, the "Brigham LLC Agreement") to, among other things, convert all of the membership interests in Brigham LLC held by its existing owners, into a single class of common units in Brigham LLC referred to as Brigham LLC Units and (ii) each holder of Brigham LLC Units, including Yorktown Energy Partners IX, L.P., a Delaware limited partnership ("Yorktown IX"), Yorktown Energy Partners X, L.P., a Delaware limited partnership ("Yorktown X"), Yorktown Energy Partners XI, L.P., a Delaware limited partnership ("Yorktown XI"), and YT Brigham Co Investment Partners, LP, a Delaware limited partnership ("YT Brigham"), received one share of Class B common stock for each Brigham LLC Unit held by such member. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for Section 16 or any other purpose. These securities are owned directly by Yorktown XI. The reporting person is a member and manager of Yorktown XI Associates LLC, the general partner of Yorktown XI Company LP, the general partner of Yorktown XI. These securities are owned directly by Yorktown X. The reporting person is a member and manager of Yorktown X Associates LLC, the general partner of Yorktown X Company LP, the general partner of Yorktown X. These securities are owned directly by Yorktown IX. The reporting person is a member and manager of Yorktown IX Associates LLC, the general partner of Yorktown IX Company LP, the general partner of Yorktown IX. These securities are owned directly by YT Brigham. The reporting person is a member and manager of YT Brigham Associates LLC, the general partner of YT Brigham Partners LP, the general partner of YT Brigham. Subject to the terms of the Brigham LLC Agreement, each holder of Brigham LLC Units may cause Brigham LLC to acquire all or a portion of its Brigham LLC Units for, at Brigham LLC's election, (i) shares of Class A common stock of the Issuer (at a redemption ratio of one share of Class A common stock for each Brigham LLC Unit redeemed, subject to conversion rate adjustments for stock splits, stock dividends and reclassification and other similar transactions) or (ii) an equivalent amount of cash. /s/ W. Howard Keenan, Jr. 2019-04-25