X0202 SCHEDULE 13G 0001305473 XXXXXXXX LIVE Common Stock, par value $0.0001 per share 06/30/2026 0001750704 Hawkeye 360, Inc. 420201105 450 Springpark Place Suite 500 Herndon VA 20170 Rule 13d-1(d) Insight Holdings Group, LLC DE 0 14163523 0 14163523 14163523 14.5 OO Calculations are based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. Insight Partners XII, L.P. E9 0 3290964 0 3290964 3290964 3.4 PN Calculations are based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. Insight Partners XII (Co-Investors), L.P. E9 0 9233 0 9233 9233 0 PN Calculations are based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. Insight Partners XII (Co-Investors) (B), L.P. E9 0 135479 0 135479 135479 0.1 PN Calculations are based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. Insight Partners (Cayman) XII, L.P. E9 0 4606612 0 4606612 4606612 4.7 PN Calculations are based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. Insight Partners (Delaware) XII, L.P. DE 0 273510 0 273510 273510 0.3 PN Calculations are based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. Insight Partners (EU) XII, S.C.Sp N4 0 752279 0 752279 752279 0.8 PN Calculations are based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. Insight Satellite Co-Invest, L.P. DE 0 2822723 0 2822723 2822723 2.9 PN Calculations are based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. Insight Partners Holdings Focus-H, L.P. DE 0 2272723 0 2272723 2272723 2.3 PN Calculations are based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. Hawkeye 360, Inc. 450 Springpark Place, Suite 500, Herndon, VA 20170 This Statement is being filed by the following persons (each a "Reporting Person" and, collectively, the "Reporting Persons"): (i) Insight Partners XII, L.P. ("IP XII"); (ii) Insight Partners XII (Co-Investors), L.P. ("IP XII Co-Investors"); (iii) Insight Partners XII (Co-Investors) (B), L.P. ("IP XII Co-Investors B"); (iv) Insight Partners (Cayman) XII, L.P. ("IP Cayman XII"); (v) Insight Partners (Delaware) XII, L.P. ("IP Delaware XII"); (vi) Insight Partners (EU) XII, S.C.Sp.("IP EU XII"); (vii) Insight Satellite Co-Invest, L.P. ("Satellite LP"); (viii) Insight Partners Holdings Focus-H, L.P. ("IP Focus-H"); and (ix) Insight Holdings Group, LLC ("Holdings"). The general partner of each of IP XII, IP XII Co-Investors, IP XII Co-Investors B, IP Cayman XII and IP Delaware XII is Insight Associates XII, L.P. ("IA XII"), whose general partner is Insight Associates XII, Ltd. ("IA XII Ltd"). The general partner of IP EU XII is Insight Associates (EU) XII, S.a.r.l. ("IA EU XII"). IP XII is the managing member of Insight Satellite Co-Invest GP, LLC ("Satellite GP"), which is the general partner of Satellite LP. Insight Falcon Associates, Ltd. ("Falcon Ltd") is the general partner of Insight Falcon Partners (A), L.P. ("Falcon LP"), which is the sole member of Insight Venture Management, LLC ("IVM"), which is the sole member of Insight Partners Warehouse GP, LLC ("Warehouse GP"), which is the general partner of IP Focus-H. The sole shareholder of IA XII Ltd, IA EU XII, and Falcon Ltd is Holdings. c/o Insight Partners, 1114 Avenue of the Americas, 36th Floor, New York, New York 10036. See Item 2(a). Y The information required by Item 4(a) is set forth in Rows 5-11 of the cover pages hereto for each Reporting Person and is incorporated herein by reference for each such Reporting Person. The percentages set forth in this Schedule 13G are calculated based upon 97,965,552 shares of Common Stock of the Issuer outstanding as of August 10, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 14, 2026. The information required by Item 4(b) is set forth in Row 11 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information required by Item 4(c) is set forth in Rows 5-11 of the cover pages hereto for each Reporting Person and is incorporated herein by reference for each such Reporting Person. The information required by Item 4(c) is set forth in Rows 5-11 of the cover pages hereto for each Reporting Person and is incorporated herein by reference for each such Reporting Person. The information required by Item 4(c) is set forth in Rows 5-11 of the cover pages hereto for each Reporting Person and is incorporated herein by reference for each such Reporting Person. The information required by Item 4(c) is set forth in Rows 5-11 of the cover pages hereto for each Reporting Person and is incorporated herein by reference for each such Reporting Person. Y N As the general partner of IP XII, IP XII Co-Investors, IP XII Co-Investors B, IP Cayman XII and IP Delaware XII, IA XII may be deemed to beneficially own all 8,315,798 shares of Common Stock held directly by the IP XII Funds. As the general partner of IA XII, IA XII Ltd may be deemed to beneficially own all 8,315,798 shares of Common Stock held directly by the IP XII Funds. As the general partner of IP EU XII, IA EU XII may be deemed to beneficially own all 752,279 shares of Common Stock held directly by IP EU XII. As the managing member of Satellite GP, IP XII may be deemed to beneficially own all 2,822,723 shares of Common Stock held directly by Satellite LP. As the general partner of Satellite LP, Satellite GP may be deemed to beneficially own all 2,822,723 shares of Common Stock held directly by Satellite LP. As the general partner of IP Focus-H, Warehouse GP may be deemed to beneficially own all 2,272,723 shares of Common Stock held directly by IP Focus-H. As the sole member of Warehouse GP, IVM may be deemed to beneficially own all 2,272,723 shares of Common Stock held directly by IP Focus-H. As the sole member of IVM, Falcon LP may be deemed to beneficially own all 2,272,723 shares of Common Stock held directly by IP Focus-H. As the general partner of Falcon LP, Falcon Ltd may be deemed to beneficially own all 2,272,723 shares of Common Stock held directly by IP Focus-H. As the sole shareholder of IA XII Ltd, IA EU XII and Falcon Ltd, Holdings may be deemed to beneficially own all 8,315,798 shares of Common Stock held directly by the IP XII Funds, all 752,279 shares of Common Stock held directly by IP EU XII, all 2,822,723 shares of Common Stock held directly by Satellite LP and all 2,272,723 shares of Common Stock held directly by IP Focus-H. The foregoing is not an admission by IA XII, IA XII Ltd, IA EU XII, Satellite GP, Warehouse GP, IVM, Falcon LP, Falcon Ltd or Holdings that it is the beneficial owner of the shares held of record by the IP XII Funds, IP EU XII, Satellite LP or IP Focus-H, nor is it an admission by any of the IP XII Funds, IP EU XII, Satellite LP or IP Focus-H that it is the beneficial owner of any shares of Common Stock held by the other of the IP XII Funds, IP EU XII, Satellite LP or IP Focus-H. Y N The Reporting Persons are making this single, joint filing because they may be deemed to constitute a "group" within the meaning of Section 13(d)(3) of the Securities Exchange Act of 1934, as amended (the "Exchange Act"). The agreement among the Reporting Persons to file jointly in accordance with Rule 13d-1(k) of the Exchange Act is attached hereto as Exhibit 99.1. The Reporting Persons disclaim membership in a group and this report shall not be deemed an admission by any of the Reporting Persons that they are or may be members of a "group" for purposes of Rule 13d-5 or for any other purpose. Y Y Insight Holdings Group, LLC /s/ John Weinstein 08/14/2026 Insight Partners XII, L.P. /s/ John Weinstein 08/14/2026 Insight Partners XII (Co-Investors), L.P. /s/ John Weinstein 08/14/2026 Insight Partners XII (Co-Investors) (B), L.P. /s/ John Weinstein 08/14/2026 Insight Partners (Cayman) XII, L.P. /s/ John Weinstein 08/14/2026 Insight Partners (Delaware) XII, L.P. /s/ John Weinstein 08/14/2026 Insight Partners (EU) XII, S.C.Sp /s/ John Weinstein 08/14/2026 Insight Satellite Co-Invest, L.P. /s/ John Weinstein 08/14/2026 Insight Partners Holdings Focus-H, L.P. /s/ John Weinstein 08/14/2026