X0202 SCHEDULE 13G 0002134152 XXXXXXXX LIVE Class A common stock, par value $0.0001 per share 06/30/2026 0001898718 GMR Solutions Inc. 38013D106 4400 Hwy 121 Suite 700 Lewisville TX 75056 Rule 13d-1(d) Pegasus Aggregator Holdco LLC b DE 168027379.17 0.00 168027379.17 0.00 168027379.17 81.1 OO Pegasus Aggregator Parent LLC b DE 168027379.17 0.00 168027379.17 0.00 168027379.17 81.1 OO KKR GMR Consolidated Aggregator LLC b DE 168027379.17 0.00 168027379.17 0.00 168027379.17 81.1 OO KKR North America Fund XI (AMG) LLC b DE 168027379.17 0.00 168027379.17 0.00 168027379.17 81.1 OO KKR AMG Managing Member LLC b DE 168027379.17 0.00 168027379.17 0.00 168027379.17 81.1 OO Henry R. Kravis b X1 0.00 168027379.17 0.00 168027379.17 168027379.17 81.1 IN George R. Roberts b X1 0.00 168027379.17 0.00 168027379.17 168027379.17 81.1 IN GMR Solutions Inc. 4400 Hwy 121, Suite 700, Lewisville, TX 75056 Each of the persons listed below under Item 2 (each, a "Reporting Person" and, collectively, the "Reporting Persons"), have agreed to file one statement with respect to their beneficial ownership of Class A common stock, par value $0.0001 per share ("Class A Common Stock"), of GMR Solutions Inc. (the "Issuer"). (i) Pegasus Aggregator Holdco LLC (ii) Pegasus Aggregator Parent LLC (iii) KKR GMR Consolidated Aggregator LLC (iv) KKR North America Fund XI (AMG) LLC (v) KKR AMG Managing Member LLC (vi) Henry R. Kravis (vii) George R. Roberts The principal business office for all persons filing (other than Mr. Roberts) is: c/o Kohlberg Kravis Roberts & Co. L.P. 30 Hudson Yards New York, New York 10001 The principal business office for George R. Roberts is: c/o Kohlberg Kravis Roberts & Co. L.P. 2800 Sand Hill Road, Suite 200 Menlo Park, CA 94025 See Item 4 of each cover page. Y As of June 30, 2026, Reporting Persons may be deemed to beneficially own an aggregate of 168,027,379.1707 shares of Class A Common Stock representing approximately 81.1% of the outstanding shares of Class A Common Stock of the Issuer calculated pursuant to Rule 13d-3 of the Securities Exchange Act of 1934, as amended. The Reporting Persons' beneficial ownership consists of: (i) 14,785,611 shares of Class A Common Stock held directly by Pegasus Aggregator Holdco LLC and (ii) an aggregate of 153,241,768.1707 warrants to purchase Class A Common Stock directly held by Pegasus Aggregator Holdco LLC, exercisable into an equal number of shares of Class A Common Stock (the "Warrants"). Excluded from beneficial ownership is an aggregate of 5,015,666.5746 warrants to purchase Class B common stock ("Class B Common Stock") of the Issuer. Each share of Class B Common Stock will automatically convert into one share of Issuer Class A Common Stock upon the sale or other transfer by the holder thereof to a person other than a permitted transferee. Each share of Class B Common Stock is non-voting, except as may be required by law or otherwise provided by the Issuer's certificate of incorporation. Calculation of beneficial ownership is based on 54,011,711 shares of Class A Common Stock outstanding as of June 1, 2026 as disclosed in the Quarterly Report on Form 10-Q filed by Isser with the Securities and Exchange Commission on June 2, 2026 and assumes the exercise of all of the Warrants beneficially held by Reporting Persons. Each of Pegasus Aggregator Parent LLC (as the sole member of Pegasus Aggregator Holdco LLC), KKR GMR Consolidated Aggregator LLC (as the sole member of Pegasus Aggregator Parent LLC), KKR North America Fund XI (AMG) LLC (as the managing member of KKR GMR Consolidated Aggregator LLC), KKR AMG Managing Member LLC (as the managing member of KKR North America Fund XI (AMG) LLC) and Messrs. Henry R. Kravis and George R. Roberts (as the sole members of KKR AMG Managing Member LLC) may be deemed to be the beneficial owners of the securities directly held by Pegasus Aggregator Holdco LLC but disclaim beneficial ownership of such securities. A minority third-party investor in Pegasus Aggregator Holdco LLC has the right, exercisable beginning 18 months from the closing of the Issuer's initial public offering, to request the sale of up to 9,935,455.54 shares of Class A Common Stock underlying warrants held by Pegasus Aggregator Holdco LLC. The Reporting Persons have voting and dispositive power over these shares, subject to customary protections for a minority holder. See Item 4(a) above. See Item 5 of each cover page. See Item 6 of each cover page. See Item 7 of each cover page. See Item 8 of each cover page. Y Y Y Y Y Y 99. 1 Joint Filing Agreement 99. 2 Powers of Attorney Pegasus Aggregator Holdco LLC /s/ Christopher Lee 08/14/2026 Pegasus Aggregator Parent LLC /s/ Christopher Lee 08/14/2026 KKR GMR Consolidated Aggregator LLC By: KKR North America Fund XI (AMG) LLC, its managing member By: KKR AMG Managing Member LLC, its managing member /s/ Christopher Lee 08/14/2026 KKR North America Fund XI (AMG) LLC By: KKR AMG Managing Member LLC, its managing member /s/ Christopher Lee 08/14/2026 KKR AMG Managing Member LLC /s/ Christopher Lee 08/14/2026 Henry R. Kravis /s/ Christopher Lee 08/14/2026 George R. Roberts /s/ Christopher Lee 08/14/2026