Company: GIGGU
Filing Date: 2025-11-12
Form Type: S-4
Source: 0001193125-25-277896
Chunk: 770

Company: GigCapital7 Corp.
Filing Date: 2025-11-12
Form: S-4
Chunk 770
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 given (i) when delivered in person, (ii) when delivered by DocuSign or other electronic means (including email), unless the sender receives an automated undeliverable notice from the Purchaser or Company recipient notice Party, (iii) one (1) Business Day after being sent, if sent by reputable, nationally recognized overnight courier service or (iv) three (3) Business Days after being mailed, if sent by registered or certified mail, pre-paidand return receipt requested, in each case to the applicable Party at the following addresses (or at such other address for a Party as shall be specified by like notice). Actual notice is effective notice for all purposes hereunder.

| If to the Purchaser:             |     | with a copy (which will not constitute notice) to: |
| GigCapital7 Corp.                |     | DLA Piper LLP (US)                                 |
| 1731 Embarcadero Road, Suite 200 |     | 555 Mission Street, Suite 2400                     |
| Palo Alto, CA 94303              |     | San Francisco, CA 94105                            |
| Attn: Dr. Avi Katz               |     | Attn: Jeffrey C. Selman; John F. Maselli           |
| Email: ***                       |     | Email: Jeffrey.Selman@us.dlapiper.com;             |
|                                  |     | John.Maselli@us.dlapiper.com                       |

A-69

| If to the Company, to:        |     | with a copy (which will not constitute notice) to: |
| Hadron Energy, Inc.           |     | Duane Morris LLP                                   |
| 3 Twin Dolphin Drive, STE 260 |     | 901 New York Avenue N.W., Suite 700 East           |
| Redwood City, CA 94065        |     | Washington, DC 20001-4795                          |
| Attn: Samuel Gibson           |     | Attn: Andy Tucker                                  |
| Email: ***                    |     | Email: ATucker@duanemorris.com                     |

Section 9.03 Binding Effect; Assignment. This Agreement and all of the provisions hereof shall be binding upon and inure to the benefit of the Parties and their respective successors and permitted assigns. This Agreement shall not be assigned by operation of Law or otherwise without the prior written consent of the Parties, and any assignment without such consent shall be null and void; providedthat no such assignment shall relieve the