Company: QTIWW
Filing Date: 2025-01-31
Form Type: S-1/A
Source: 0001628280-25-003316
Chunk: 458

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-01-31
Form: S-1/A
Chunk 458
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Extension Notes

On September 26, 2022, the Company issued the Extension Note to the Sponsor for a principal amount of $ 160,000. The Extension Note was subsequently amended and restated eleven times from October 26, 2022 through February 27, 2023 to add additional monthly funding installments at $ 160,000per month, then $ 100,000thereafter for each one-month extension of the time period from March 28, 2023 through August 28, 2023, for a collective principal amount outstanding as of December 31, 2023 under the Extension Note of $ 1,560,000. The proceeds from the Extension Note were deposited into the Trust Account in accordance with the terms of the Company’s Amended and Restated Certificate of Incorporation. The Extension Note matures on the earlier of the date on which the Company consummates its initial Business Combination or the date the Company winds up and may be prepaid without penalty. The Company imputed interest on the Extension Note using the equivalent average market discount rate for an unsecured loan ( 18.22%), resulting in a debt discount of $ 299,287that was recorded as a reduction to the carrying principal amount of the Extension Note with a corresponding increase to additional paid-in capital. As of December 31, 2023, the outstanding principal on the Extension Note, net of the debt discount, was $ 1,564,673and the remaining unamortized debt discount was $ 61,687. During the year ended December 31, 2023, interest expense related to the Extension Note was $ 219,686.

#### 6.

#### COMMITMENTS AND CONTINGENCIES
Registration Rights

On September 23, 2021, the Company entered into a registration rights agreement with its Founder and Insiders. These holders will be entitled to make up to two demands, excluding short form registration demands, that the Company register such securities for sale under the Securities Act. In addition, these holders will have “piggy-back”

<div align='center'>F-81</div>

#### GIGCAPITAL5, INC.

#### Notes to Financial Statements
registration rights to include their securities in other registration statements filed by the Company. The Company will bear the expenses incurred in connection with the filing of any such registration statements. There will be no penalties associated with delays in registering the securities under the registration rights agreement.

Underwriters Agreement

The Company granted the underwriters a 45-day