SCHEDULE 13D/A 0001193125-24-246604 0001774565 XXXXXXXX LIVE 6 Class A Common Stock, $0.0001 par value per share 06/12/2025 false 0001642896 79589L106 Samsara Inc.

1 De Haro Street San Francisco CA 94107

Christopher McCain (617) 234-7000 General Catalyst Partners 20 University Road, 4th Floor Cambridge MA 02138 0001774565 N General Catalyst Group Management Holdings GP, LLC b AF N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 OO 0001774564 N General Catalyst Group Management Holdings, L.P. b AF N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 PN 0001637946 N General Catalyst Group Management, LLC b AF N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 OO 0001663852 N General Catalyst Group VIII, L.P. b WC N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 PN 0001758429 N General Catalyst Partners VIII, L.P. b AF N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 PN 0001758432 N General Catalyst GP VIII, LLC b AF N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 OO 0001801515 N General Catalyst Group X - Endurance, L.P. b WC N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 PN 0001801512 N General Catalyst Partners X - Growth Venture, L.P. b AF N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 PN 0001801510 N General Catalyst GP X - Growth Venture, LLC b AF N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 OO 0001883723 N General Catalyst Group XI - Endurance, L.P. b WC N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 PN Y General Catalyst Partners XI - Endurance, L.P. b AF N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 PN Y General Catalyst Endurance GP XI, LLC b AF N DE 0.00 11981331.00 0.00 11981331.00 11981331.00 N 4.0 OO Class A Common Stock, $0.0001 par value per share Samsara Inc. 1 De Haro Street San Francisco CA 94107 This Statement represents Amendment No. 6 to the Schedule 13D (the "Original Schedule 13D") originally filed with the Securities and Exchange Commission (the "SEC") by the Reporting Persons on December 27, 2021 and amended by Amendment No. 1 to the Schedule 13D ("Amendment No. 1"), originally filed with the SEC by the Reporting Persons on March 20, 2023, Amendment No. 2 to the Schedule 13D ("Amendment No. 2"), originally filed with the SEC by the Reporting Persons on September 15, 2023, Amendment No. 3 to the Schedule 13D ("Amendment No. 3"), originally filed with the SEC by the Reporting Persons on March 21, 2024, Amendment No. 4 to the Schedule 13D ("Amendment No. 4"), originally filed with the SEC by the Reporting Persons on September 19, 2024 and Amendment No. 5 to the Schedule 13D ("Amendment No. 5"), originally filed with the SEC by the Reporting Persons on October 29, 2024. All capitalized terms not otherwise defined herein have the meanings set forth in the Original Schedule 13D, Amendment No. 1, Amendment No. 2, Amendment No. 3, Amendment No. 4 and Amendment No. 5. Section (a) of Item 5 is hereby amended and restated in its entirety as follows: GC VIII is the record owner of 5,460,903 of the GC Shares. As the sole general partner of GC VIII, GC VIII GPLP may be deemed to own beneficially such GC Shares. As the sole general partner of GC VIII GPLP, GC VIII GPLLC may be deemed to own beneficially such GC Shares. GC X is the record owner of 4,520,428 of the GC Shares. As the sole general partner of GC X, GC X GPLP may be deemed to own beneficially such GC Shares. As the sole general partner of GC X GPLP, GC X GPLLC may be deemed to own beneficially such GC Shares. GC XI is the record owner of 2,000,000 of the GC Shares. As the sole general partner of GC XI, GC XI GPLP may be deemed to own beneficially such GC Shares. As the sole general partner of GC XI GPLP, GC XI GPLLC may be deemed to own beneficially such GC Shares. By virtue of their relationship as affiliated entities who have overlapping general partners and managing directors, each entity and Reporting Person may be deemed to share the power to direct the disposition and/or vote of the GC Shares. As the manager of each of GC VIII GPLLC, GC X GPLLC and GC XI GPLLC, GCGM LLC may be deemed to own beneficially such GC Shares. As the manager of GCGM LLC, GCGM LP may be deemed to own beneficially such GC Shares. As the general partner of GCGM LP, GCGM Holdings may be deemed to own beneficially such GC Shares. Further, each Reporting Person disclaims beneficial ownership of the GC Shares except for the shares, if any, such Reporting Person holds of record. The percentage of outstanding Common Stock of the Issuer which may be deemed to be beneficially owned by each Reporting Person is set forth on Line 13 calculated using the outstanding shares of Class A Common Stock only. As disclosed in the Issuer's Form 10-Q filed on June 10, 2025 with the SEC (File No. 001-41140), the Issuer had 299,748,928 outstanding shares of Class A Common Stock as of June 3, 2025. Section (b) of Item 5 is hereby amended and restated in its entirety as follows: Regarding the number of shares as to which such person has: (i) sole power to vote or to direct the vote: See line 7 of cover sheets (ii) shared power to vote or to direct the vote: See line 8 of cover sheets (iii) sole power to dispose or to direct the disposition: See line 9 of cover sheets. (iv) shared power to dispose or to direct the disposition: See line 10 of cover sheets Section (c) of Item 5 is hereby amended and restated in its entirety as follows: Effective June 12, 2025, GC VIII distributed in-kind on a pro rata basis, without consideration, a total of 5,460,902 shares of Class A Common Stock of the Issuer to its general and limited partners. No other person is known to have the right to receive or the power to direct the receipt of dividends from, or any proceeds from the sale of, the shares of Class A Common Stock of the Issuer beneficially owned by any of the Reporting Persons. Section (e) of Item 5 is hereby amended and restated in its entirety as follows: As of June 12, 2025, the Reporting Persons ceased to beneficially own more than 5% of the outstanding shares of Class A Common Stock of the Issuer. Exhibit 99.1 - Agreement regarding joint filing Schedule 13D General Catalyst Group Management Holdings GP, LLC /s/ Christopher McCain 06/16/2025 General Catalyst Group Management Holdings, L.P. /s/ Christopher McCain 06/16/2025 General Catalyst Group Management, LLC /s/ Christopher McCain 06/16/2025 General Catalyst Group VIII, L.P. /s/ Christopher McCain 06/16/2025 General Catalyst Partners VIII, L.P. /s/ Christopher McCain 06/16/2025 General Catalyst GP VIII, LLC /s/ Christopher McCain 06/16/2025 General Catalyst Group X - Endurance, L.P. /s/ Christopher McCain 06/16/2025 General Catalyst Partners X - Growth Venture, L.P. /s/ Christopher McCain 06/16/2025 General Catalyst GP X - Growth Venture, LLC /s/ Christopher McCain 06/16/2025 General Catalyst Group XI - Endurance, L.P. /s/ Christopher McCain 06/16/2025 General Catalyst Partners XI - Endurance, L.P. /s/ Christopher McCain 06/16/2025 General Catalyst Endurance GP XI, LLC /s/ Christopher McCain 06/16/2025