Sec Form 4 Filing - Hamilton Sue Ann @ Liberty Broadband Corp - 2025-07-17

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Hamilton Sue Ann 2. Issuer Name and Ticker or Trading Symbol Liberty Broadband Corp [ LBRDK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 12300 LIBERTY BLVD. 3. Date of Earliest Transaction (MM/DD/YY) 07/17/2025 (Street) ENGLEWOOD, CO80112 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Stock Option - LBRDK (Right to Buy) $ 141.73 07/17/2025 J( 1 ) V 4,494 ( 2 ) 12/07/2027 Series C Common Stock 4,494 $ 0 ( 1 ) 4,494 D Stock Option - LBRDK (Right to Buy) $ 147.33 07/17/2025 J( 1 ) V 3,949 ( 2 ) 12/07/2028 Series C Common Stock 3,949 $ 0 ( 1 ) 3,949 D Stock Option - LBRDK (Right to Buy) $ 71.17 07/17/2025 J( 1 ) V 6,486 ( 2 ) 12/11/2030 Series C Common Stock 6,486 $ 0 ( 1 ) 6,486 D Stock Option - LBRDK (Right to Buy) $ 83.37 07/17/2025 J( 1 ) V 3,091 ( 2 ) 12/12/2029 Series C Common Stock 3,091 $ 0 ( 1 ) 3,091 D Stock Option - LBRDK (Right to Buy) $ 152.25 07/17/2025 J( 1 ) V 4,184 12/07/2021 12/07/2027 Series C Common Stock 4,184 $ 0 ( 1 ) 0 D Stock Option - LBRDK (Right to Buy) $ 158.27 07/17/2025 J( 1 ) V 3,676 12/07/2022 12/07/2028 Series C Common Stock 3,676 $ 0 ( 1 ) 0 D Stock Option - LBRDK (Right to Buy) $ 76.45 07/17/2025 J( 1 ) V 6,038 12/11/2024 12/11/2030 Series C Common Stock 6,038 $ 0 ( 1 ) 0 D Stock Option - LBRDK (Right to Buy) $ 89.56 07/17/2025 J( 1 ) V 2,878 12/12/2023 12/12/2029 Series C Common Stock 2,878 $ 0 ( 1 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Hamilton Sue Ann 12300 LIBERTY BLVD. ENGLEWOOD, CO80112 X Signatures /s/ Brittany A. Uthoff as Attorney-in-Fact for Sue Ann Hamilton 07/23/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On July 14, 2025, Liberty Broadband Corporation completed the spin-off of GCI Liberty, Inc. (the "Spin-Off"), which was effected by the distribution to each holder of its common stock as of 5:00 p.m., New York City time, on June 30, 2025, of 0.20 of a share of GCI Liberty, Inc.'s Series A, Series B and Series C GCI Group common stock for each whole share of the corresponding series of Liberty Broadband Corporation's common stock, with cash (with no interest) paid in lieu of fractional shares. In connection with the Spin-Off, all stock options held by the Reporting Person in the Issuer's Series C Common Stock were adjusted in a manner designed to preserve the value associated with the original awards prior to the Spin-Off. The number of shares and the exercise price for each adjusted award were determined on July 17, 2025. Otherwise, such award remains subject to the terms and conditions of the corresponding original award. ( 2 )This option award is fully exercisable.

Remarks: The adjustments described above were approved by the Issuer's board of directors pursuant to Rule 16b-3 under the Securities Exchange Act of 1934, as amended.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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