Jason Park - 05 May 2022 Form 4 Insider Report for DraftKings Holdings Inc.

Footnote F1

Pursuant to the Agreement and Plan of Merger, dated August 9, 2021 (the "Merger Agreement"), between DraftKings Inc. (now known as DraftKings Holdings Inc.) ("Old DraftKings"), Golden Nugget Online Gaming, Inc., New Duke Holdco, Inc. (now known as DraftKings Inc.) ("New DraftKings"), Duke Merger Sub, Inc. ("DK Merger Sub") and Gulf Merger Sub, Inc., upon the consummation of the merger of DK Merger Sub with and into Old DraftKings at 12:01 a.m. Eastern Time on May 5, 2022 (the "DraftKings Merger"), each issued and outstanding share of Class A common stock, par value $0.0001 per share, of Old DraftKings ("Old DraftKings Class A Common Stock") was converted into the right to receive one share of Class A common stock, par value $0.0001 per share, of New DraftKings ("New DraftKings Class A Common Stock"). The disposition of the Old DraftKings Class A Common Stock is exempt from Section 16(b) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), (continued in footnote 2)

Footnote F2

(Continued from footnote 1) pursuant to Rule 16b-7 under the Exchange Act. Contemporaneously with the filing of this Form 4 to reflect the disposition of Old DraftKings Class A Common Stock by the Reporting Person in connection with the consummation of the DraftKings Merger, the Reporting Person is filing a Form 4 with respect to New DraftKings to report the acquisition by such Reporting Person of an equal number of shares of New DraftKings Class A Common Stock in connection with the consummation of the DraftKings Merger. This Form 4 only reports the disposition of securities of the Reporting Person pursuant to the Merger Agreement and does not reflect sales of securities by the Reporting Person.

Footnote F3

Pursuant to the Merger Agreement and in connection with the consummation of the DraftKings Merger, each outstanding restricted stock unit denominated in Old DraftKings Class A Common Stock (collectively, the "Old DraftKings RSUs") was converted into an equivalent restricted stock unit denominated in New DraftKings Class A Common Stock (collectively, the "New DraftKings RSUs"), each of which represents a contingent right to receive one share of New DraftKings Class A Common Stock. Contemporaneously with the filing of this Form 4 to reflect the disposition of Old DraftKings RSUs by the Reporting Person in connection with the consummation of the DraftKings Merger, the Reporting Person is filing a Form 4 with respect to New DraftKings to report the acquisition by such Reporting Person of an equal number of New DraftKings RSUs in connection with the consummation of the DraftKings Merger. This Form 4 only reports the disposition of securities of the (continued in footnote 4)

Footnote F4

(Continued from footnote 3) Reporting Person pursuant to the Merger Agreement and does not reflect the sale of securities by the Reporting Person. As used herein, the term "RSUs" refers to (i) Old DraftKings RSUs prior to the DraftKings Merger and (ii) New DraftKings RSUs following the DraftKings Merger, in each case, unless the context requires otherwise.

Footnote F5

The Reporting Person was granted 74,158 RSUs on August 11, 2020 vesting quarterly over four (4) years from April 23, 2020, with the vesting of the first tranche occurring on September 12, 2020.

Footnote F6

On February 22, 2021, the Reporting Person was granted 42,539 RSUs vesting quarterly over four (4) years.

Footnote F7

On February 9, 2022, the Reporting Person was granted 246,852 RSUs vesting quarterly over four (4) years.

Footnote F8

Pursuant to the Merger Agreement and in connection with the consummation of the DraftKings Merger, each outstanding stock option to purchase Old DraftKings Class A Common Stock ("Old DraftKings Options") was converted into an equivalent stock option to purchase New DraftKings Class A Common Stock ("New DraftKings Options"). Contemporaneously with the filing of this Form 4 to reflect the disposition of Old DraftKings Options by the Reporting Person in connection with the consummation of the DraftKings Merger, the Reporting Person is filing a Form 4 with respect to New DraftKings to report the acquisition by such Reporting Person of an equal number of New DraftKings Options in connection with the consummation of the DraftKings Merger. This Form 4 only reports the disposition of securities of the Reporting Person pursuant to the Merger Agreement and does not reflect the sale of securities by the Reporting Person. As used herein, the term "Stock Options" (continued in footnote 9)

Footnote F9

(Continued from footnote 8) refers to (i) Old DraftKings Options prior to the DraftKings Merger and (ii) New DraftKings Options following the DraftKings Merger, in each case, unless the context requires otherwise.

Footnote F10

These Stock Options were granted on June 4, 2019. As of the date hereof, 343,378 of such Stock Options have vested. The remaining Stock Options will vest in five (5) equal quarterly installments beginning June 4, 2022.

Footnote F11

These Stock Options were granted on August 15, 2019. As of the date hereof, 33,590 of such Stock Options have vested. The remaining Stock Options will vest in five (5) equal quarterly installments beginning June 4, 2022.

Footnote F12

These Stock Options are vested and exercisable as of the date hereof.