Company: QTIWW
Filing Date: 2025-03-03
Form Type: 424B3
Source: 0001844505-25-000032
Chunk: 2

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-03-03
Form: 424B3
Chunk 2
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 Trading 
 Symbols |     | Name of each exchange       
 on which registered         |
| Common stock, par value $0.0001 per share |     | QTI     |     | The Nasdaq Stock Market LLC |

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 1.01 Entry into a Definitive Material Agreement

#### Lynrock Lake Term Note
On February 26, 2025, QT Imaging Holdings, Inc. (the “ Company ”) entered into a credit agreement (the “ Credit Agreement ”) that provides a senior secured term loan (the “ Lynrock Lake Term Loan ”) with Lynrock Lake Master Fund LP (“ Lynrock Lake ”). The Credit Agreement is secured by a first priority lien on substantially all assets of the Company and its domestic subsidiaries, QT Imaging, Inc., a Delaware corporation (“ QT Imaging ”), and QT Ultrasounds Labs, Inc. (“ QT Ultrasounds Labs ” and together with QT Imaging, the “ Guarantors ”), a Delaware corporation, and provides for a term loan in the aggregate principal amount of $10,100,000 at an interest rate of 10.0% per annum, compounded quarterly by adding the amount thereof to the unpaid principal amount. The obligations of the Company under the Credit Agreement are guaranteed by each of the Guarantors. The maturity date of the Credit Agreement is March 31, 2027 (the “ Maturity Date ”). A portion of the proceeds is expected to be used to satisfy the Company’s outstanding obligations under the Cable Car Note (as defined below) and the Yorkville Note (as defined below).

The senior secured term loan shall be repaid on the Maturity Date in an amount equal to the aggregate principal amount outstanding, together with all accrued and unpaid principal and any outstanding and payable fees.

Subject to the payment of the Make-Whole Amount (as defined in the Credit Agreement), the Company may at any time prior to the Maturity Date optionally prepay the