RAIN · Rain Enhancement Technologies Holdco, Inc.

The shares of Class A Common stock were granted for no cash consideration. The closing price of the stock on the day of the grant was $2.20.

The shares of Class A Common stock were granted for no cash consideration. The closing price of the stock on the day of the grant was $2.20.

The shares of Class A Common stock were granted for no cash consideration. The closing price of the stock on the day of the grant was $2.20.

The shares of Class A Common stock were granted for no cash consideration. The closing price of the stock on the day of the grant was $2.20.

RHY Management, LLC ("RHY") exchanged an aggregate of $4,000,000 of indebtedness owed by the Company to RHY into 1,612,903 shares of the Issuer's Class A common stock, par value $0.0001 per share.

Mr. You is the sole member of RHY and may be deemed to have a pecuniary interest in the securities held by RHY. Mr. You disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

The shares of Class A Common stock were granted for no cash consideration. The closing price of the stock on the day of the grant was $2.20.

The shares of Class A Common stock were granted for no cash consideration. The closing price of the stock on the day of the grant was $2.20.

The shares of Class A Common stock were granted for no cash consideration. The closing price of the stock on the day of the grant was $2.20.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $5.50 to $6.29, inclusive.

The reporting person undertakes to provide to Rain Enhancement Technologies Holdco, Inc. (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 at each separate price within the range set forth herein.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $5.77 to $5.86, inclusive.

The reporting person undertakes to provide to Rain Enhancement Technologies Holdco, Inc. (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 at each separate price within the range set forth herein.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $5.15 to $5.39, inclusive.

The reporting person undertakes to provide to Rain Enhancement Technologies Holdco, Inc. (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 at each separate price within the range set forth herein.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.46 to $2.64, inclusive.

The reporting person undertakes to provide to Rain Enhancement Technologies Holdco, Inc. (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 at each separate price within the range set forth herein.

Mr. Seidl also received a restricted stock award for 602,320 shares of Class A Common Stock, of which 50% vested on January 1, 2026, and 50% shall vest on January 1,2027, subject to continued employment or service through the vesting date.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $2.10 to $2.78, inclusive.

The reporting person undertakes to provide to Rain Enhancement Technologies Holdco, Inc. (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 at each separate price within the range set forth herein.

Mr. Seidl also received a restricted stock award for 602,320 shares of Class A Common Stock, of which 50% vested on January 1, 2026, and 50% shall vest on January 1,2027, subject to continued employment or service through the vesting date.

The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $1.41 to $2.00, inclusive.

The reporting person undertakes to provide to Rain Enhancement Technologies Holdco, Inc. (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 at each separate price within the range set forth herein.

Mr. Seidl also received a restricted stock award for 602,320 shares of Class A Common Stock, of which 50% vested on January 1, 2026, and 50% shall vest on January 1,2027, subject to continued employment or service through the vesting date.

In connection with the closing of the business combination ("Business Combination") between Coliseum Acquisition Corp. ("Coliseum"), Rain Enhancement Technologies, Inc. ("RET"), and Rain Enhancement Technologies Holdco, Inc. (the "Issuer"), the Reporting Person subscribed to purchase an aggregate of 21,955 shares of the Issuer's Class A common stock, par value $0.0001 per share, at a price of approximately $11.39 per share in a private placement pursuant to a Subscription Agreement dated as of December 23, 2024, by and among the Reporting Person and the Issuer. As previously reported, an aggregate of 8,782 shares of Class A Common Stock was issued pursuant to such subscription on December 31, 2024. The remaining 13,173 shares of Class A Common Stock pursuant to such subscription were issued on February 6, 2025.

In connection with the closing of the business combination ("Business Combination") between Coliseum Acquisition Corp. ("Coliseum"), Rain Enhancement Technologies, Inc. ("RET"), and Rain Enhancement Technologies Holdco, Inc. (the "Issuer"), Mr. You subscribed to purchase an aggregate of 43,910 shares of the Issuer's Class A common stock, par value $0.0001 per share ("Class A Common Stock") at a price of approximately $11.39 per share in a private placement pursuant to a Subscription Agreement dated as of December 23, 2024, by and among Mr. You and the Issuer. Such subscription closed on January 29, 2025.

Represents shares held by RHY 2021 Irrevocable Trust (the "Trust"). Mr. You is the settlor and investment officer of the Trust, and his son is the beneficiary of the Trust. Accordingly, Mr. You may be deemed to have a pecuniary interest in the securities held by the Trust. Mr. You disclaims beneficial ownership of such securities except to the extent of his pecuniary interest therein.

In connection with the closing of the business combination ("Business Combination") between Coliseum Acquisition Corp. ("Coliseum"), Rain Enhancement Technologies, Inc. ("RET"), and Rain Enhancement Technologies Holdco, Inc. (the "Issuer"), Berto LLC ("Berto") agreed to exchange 2,257,500 Coliseum private placement warrants held by it for an aggregate of 564,375 shares of the Issuer's Class A common stock, par value $0.0001 per share.

Mr. You is the sole member of Berto and has voting and investment discretion with respect to the securities held of record by Berto. Mr. You disclaims beneficial ownership of the securities held by Berto, except to the extent of his pecuniary interest therein.

In connection with the closing of the business combination ("Business Combination") between Coliseum Acquisition Corp. ("Coliseum"), Rain Enhancement Technologies, Inc. ("RET"), and Rain Enhancement Technologies Holdco, Inc. ("Holdco"), the Reporting Person acquired an aggregate of 17,564 shares of Holdco Class A Common Stock at a price of $11.39 per share in a private placement pursuant to a Subscription Agreement dated as of December 23, 2024, by and among the Reporting Person and Holdco.

In connection with the closing of the business combination ("Business Combination") between Coliseum Acquisition Corp. ("Coliseum"), Rain Enhancement Technologies, Inc. ("RET"), and Rain Enhancement Technologies Holdco, Inc. (the "Issuer"), the Reporting Person acquired an aggregate of 8,782 shares of the Issuer's Class A common stock, par value $0.0001 per share, at a price of approximately $11.39 per share in a private placement pursuant to a Subscription Agreement dated as of December 23, 2024, by and among the Reporting Person and the Issuer.

Paul T. Dacier is the sole member of Rainwater LLC and has voting and investment discretion with respect to the securities held of record by Rainwater LLC. Mr. Dacier disclaims beneficial ownership of the securities held by Rainwater LLC, except to the extent of his pecuniary interest therein.