Sec Form 4 Filing - O'Toole Brian E @ BlackSky Technology Inc. - 2026-06-10

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 O'Toole Brian E 2. Issuer Name and Ticker or Trading Symbol BlackSky Technology Inc. [ BKSY] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) CEO and President (Last) (First) (Middle) C/O BLACKSKY TECHNOLOGY INC.,, 2411 DULLES CORNER PARK, SUITE 300 3. Date of Earliest Transaction (MM/DD/YY) 06/10/2026 (Street) HERNDON, VA20171 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 Class A Common Stock 06/10/2026 S 15,512 ( 1 ) D $ 34.1 1,139,676 ( 2 ) ( 3 ) D

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 Options (Right To Buy) $ 9.23 ( 4 ) 03/10/2035 Class A Common Stock 210,834 210,834 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other O'Toole Brian E C/O BLACKSKY TECHNOLOGY INC., 2411 DULLES CORNER PARK, SUITE 300 HERNDON, VA20171 X CEO and President Signatures /s/ Christiana L. Lin, attorney-in-fact on behalf of Brian E. OToole 06/12/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units (RSUs) and does not represent a discretionary sale by the Reporting Person. The "Amount" and "Price" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. ( 2 )Certain of these securities are RSUs. Each RSU represents a contingent right to receive one share of Class A Common Stock, subject to the applicable vesting schedule and conditions of each RSU. ( 3 )The Form 4 filed on September 15, 2025 (the "Original Form 4") and the Form 4/A filed on October 17, 2025 (the "Original Form 4/A") erroneously reflected an incorrect vesting schedule. One third (1/3rd) of the RSUs are scheduled to vest on September 10, 2026, and thereafter, one twelfth (1/12th) of the total number of RSUs are scheduled to vest quarterly on the 10th day of the third month of each quarter (March 10, June 10, September 10, December 10), subject to the named executive officer continuing to be a service provider through the applicable vesting date. The Amount of Securities Beneficially Owned Following Reported Transactions represented on the Original Form 4 and the Original Form 4/A was correctly reported. ( 4 )This holding report is reflected solely to clarify the vesting schedule set forth in the Form 4 filed on March 12, 2025. Each Option represents a right to purchase the underlying securities of the Issuer reported in Table II. The options are granted pursuant to the BlackSky Technology Inc. 2021 Equity Incentive Plan. The number of options and exercise price for the options was calculated based on the closing price of a share of BlackSky Technology Inc.'s Class A Common Stock on the New York Stock Exchange on March 10, 2025. One third (1/3rd) of the award vests on March 10, 2026, and thereafter, one thirty-sixth (1/36th) of the award vests or is scheduled to vest monthly on the 10th day of each month, subject to the Reporting Person continuing to be a service provider through the applicable vesting date.

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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