Company: GDSTR
Filing Date: 2025-05-14
Form Type: S-4/A
Source: 0001213900-25-043297
Chunk: 546

Company: Goldenstone Acquisition Ltd.
Filing Date: 2025-05-14
Form: S-4/A
Chunk 546
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 3. Counterparts . This Joinder may be executed in two or more counterparts, each of which shall be an original and all of which together shall constitute one instrument. [REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK] Annex A-88

IN WITNESS WHEREOF, the parties hereto have executed this Joinder to the Stockholder Support Agreement as of the date first above written.

| [STOCKHOLDER NAME] |
| By:                |
| Name:              |
| Title:             |
| Address:           |
| Email:             |

| Securities beneficially owned on the date hereof: |
| ____________shares of Class A Common Stock        |

Annex A-89

IN WITNESS WHEREOF, the parties hereto have executed this Joinder to Stockholder Support Agreement as of the date first written above.

| GOLDENSTONE ACQUISITION LIMITED |     |                         |
| By:                             |     |                         |
|                                 |     | Eddie Ni                |
|                                 |     | Chief Executive Officer |

Annex A-90

STOCKHOLDER SUPPORT AGREEMENT SPOUSAL CONSENT I , spouse of , have read and approve the foregoing Stockholder Support Agreement (the “ Agreement ”). In consideration of the terms and conditions as set forth in the Agreement, I hereby appoint my spouse as my attorney-in-fact with respect to the exercise of any rights and obligations under the Agreement, and agree to be bound by the provisions of the Agreement insofar as I may have any rights or obligations in the Agreement under the community property laws or similar laws relating to marital or community property in effect in the state of our residence as of the date of the Agreement.

| Date ___________________________________________           |
| Signature of Spouse _____________________________          |
| Printed Name of Spouse ___________________________________ |

Annex A-91 EXHIBIT C LOCK-UP PARTIES 1.Charles Mao 2.Jinming (Jim) Yang 3.Yan (Chris) Feng 4.Sheng Jiaw (Joe) Hwang 5.Ancheng Industries, Inc 6.Jie Ran Li Annex A-92 FORM OF
LOCK-UP AGREEMENT This Lock-Up Agreement (this “ Agreement ”) is dated as of [•], 2024 by and between the undersigned stockholder (the “ Holder ”) of Infintium Fuel Cell Systems, Inc., a Delaware corporation (the “ Company ”) and Goldenstone Acquisition Limited, a Delaware corporation (the