HAWK · HawkEye 360, Inc. · Insider Trading

Represents shares sold pursuant to a Rule 10b5-1 Plan adopted on May 21, 2026.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.02 to $16.52 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold each separate price within the range set forth in this footnote.

The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.06 to $16.51 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold each separate price within the range set forth in this footnote.

The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of RSUs. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.06 to $16.51 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold each separate price within the range set forth in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.12 to $16.62 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold each separate price within the range set forth in this footnote.

Fully vested.

Fully vested.

Fully vested.

Fully vested.

See Exhibit 99.1

See Exhibit 99.1

The Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and Series D-1 Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering (IPO) for no additional consideration, on a 1-for-1 basis, and had no expiration date.

These securities are owned directly by REII Sidecar 2, LLC. Razor's Edge Ventures II, LLC is the manager of REII Sidecar 2, LLC. The reporting person is a managing member of Razor's Edge Ventures II, LLC and may be deemed to be the beneficial owner of the securities held by REII Sidecar 2, LLC. The reporting person disclaims beneficial ownership of the securities held by REII Sidecar 2, LLC except to the extent of his pecuniary interest therein.

See Exhibit 99.1

See Exhibit 99.1

The warrant to acquire common stock automatically net exercised into shares of the Issuer's common stock immediately prior to consummation of the IPO. The warrant had an exercise price of $0.01 per share. The holder paid the exercise price on a cashless basis, resulting in the Issuer's withholding of 1 of the warrant shares to pay the exercise price and issuing to the holder the remaining 122 shares.

The shares are held by the Money Family Trust dated November 19, 1981, revised August 26, 2016, of which the reporting person is the trustee and has voting and dispositive power.

See Exhibit 99.1

See Exhibit 99.1

The warrant to acquire common stock automatically net exercised into shares of the Issuer's common stock immediately prior to consummation of the IPO. The warrant had an exercise price of $0.01 per share. NightDragon I paid the exercise price on a cashless basis, resulting in the Issuer's withholding of 33 of the warrant shares to pay the exercise price.

The Warrant is held of record by NightDragon I. NightDragon GP I is the general partner of NightDragon I.

See Exhibit 99.1

See Exhibit 99.1

The Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock and Series E Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

The shares are held of record by NightDragon Growth I, L.P. ("NightDragon I"). NightDragon Growth GP I, LLC ("NightDragon GP I") is the general partner of NightDragon I. The Reporting Person is the managing member of NightDragon GP I and may be deemed to hold voting and investment power with respect to the shares held by NightDragon I.

See Exhibit 99.1

See Exhibit 99.1

The Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series C Preferred Stock, and Series D Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

The Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock and Series E Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

See Exhibit 99.1

See Exhibit 99.1

The Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock and Series E Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

The shares are held of record by NightDragon Growth II, L.P. ("NightDragon II"). NightDragon Growth GP II, LLC ("NightDragon GP II") is the general partner of NightDragon II. The Reporting Person is the managing member of NightDragon GP II and may be deemed to hold voting and investment power with respect to the shares held by NightDragon II.

The Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, and Series E Preferred Stockautomatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

The shares are held of record by NightDragon Growth II, L.P. ("NightDragon II"). NightDragon Growth GP II, LLC ("NightDragon GP II") is the general partner of NightDragon II. The Reporting Personis the managing member of NightDragon GP II and may be deemed to hold voting and investment power with respect to the shares held by NightDragon II.

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

The Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock and Series E Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

The shares are held of record by NightDragon Growth I, L.P. ("NightDragon I"). NightDragon Growth GP I, LLC ("NightDragon GP I") is the general partner of NightDragon I. The Reporting Person is the managing member of NightDragon GP I and may be deemed to hold voting and investment power with respect to the shares held by NightDragon I.

See Exhibit 99.1

See Exhibit 99.1

The Series A-1 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, and Series D Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

See Exhibit 99.1

See Exhibit 99.1

The Series A-1 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, and Series D Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

The shares are held by the Money Family Trust dated November 19, 1981, revised August 26, 2016, of which the reporting person is the trustee and has voting and dispositive power.

The Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock and Series E Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

The shares are held of record by NightDragon Growth II, L.P. ("NightDragon II"). NightDragon Growth GP II, LLC ("NightDragon GP II") is the general partner of NightDragon II. The Reporting Person is the managing member of NightDragon GP II and may be deemed to hold voting and investment power with respect to the shares held by NightDragon II.

See Exhibit 99.1

See Exhibit 99.1

The Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and Series D-1 Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering (IPO) for no additional consideration, on a 1-for-1 basis, and had no expiration date.

These securities are owned directly by Razor's Edge Fund II-A, LP. Razor's Edge Ventures II, LLC is the general partner of Razor's Edge Fund II-A, LP. The reporting person is a managing member of Razor's Edge Ventures II, LLC and may be deemed to be the beneficial owner of the securities held by Razor's Edge Fund II-A, LP. The reporting person disclaims beneficial ownership of the securities held by Razor's Edge Fund II-A, LP except to the extent of his pecuniary interest therein.

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

See Exhibit 99.1

The warrant to acquire common stock automatically net exercised into shares of the Issuer's common stock immediately prior to consummation of the IPO. The warrant had an exercise price of $0.01 per share. The holder paid the exercise price on a cashless basis, resulting in the Issuer's withholding of 33 of the warrant shares to pay the exercise price and issuing to the holder the remaining 85,240 shares.

The shares are held of record by NightDragon Growth I, L.P. ("NightDragon I"). NightDragon Growth GP I, LLC ("NightDragon GP I") is the general partner of NightDragon I. The Reporting Person is the managing member of NightDragon GP I and may be deemed to hold voting and investment power with respect to the shares held by NightDragon I.

See Exhibit 99.1

See Exhibit 99.1

The Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock and Series E Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

The shares are held of record by NightDragon Growth I, L.P. ("NightDragon I"). NightDragon Growth GP I, LLC ("NightDragon GP I") is the general partner of NightDragon I. The Reporting Person is the managing member of NightDragon GP I and may be deemed to hold voting and investment power with respect to the shares held by NightDragon I.

The Series A-1 Preferred Stock, Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock, Series D-1 Preferred Stock and Series E Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering for no additional consideration, on a 1-for-1 basis, and had no expiration date.

The shares are held of record by NightDragon Growth I, L.P. ("NightDragon I"). NightDragon Growth GP I, LLC ("NightDragon GP I") is the general partner of NightDragon I.

The Series A-2 Preferred Stock, Series A-3 Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and Series D-1 Preferred Stock automatically converted into common stock upon the closing of the Issuer's initial public offering (IPO) for no additional consideration, on a 1-for-1 basis, and had no expiration date.

These securities are owned directly by Razor's Edge Fund II, LP. Razor's Edge Ventures II, LLC is the general partner of Razor's Edge Fund II, LP. The reporting person is a managing member of Razor's Edge Ventures II, LLC and may be deemed to be the beneficial owner of the securities held by Razor's Edge Fund II, LP. The reporting person disclaims beneficial ownership of the securities held by Razor's Edge Fund II, LP except to the extent of his pecuniary interest therein.

The warrant to acquire common stock automatically net exercised into shares of the Issuer's common stock immediately prior to consummation of the IPO. The warrant had an exercise price of $0.01 per share. The holder paid the exercise price on a cashless basis, resulting in the Issuer's withholding of 1 of the warrant shares to pay the exercise price and issuing to the holder the remaining 122 shares.

The shares are held by the Money Family Trust dated November 19, 1981, revised August 26, 2016, of which the reporting person is the trustee and has voting and dispositive power.

See Exhibit 99.1

See Exhibit 99.1