Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 395

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 395
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 common stock effective October 23, 2025. In connection with the Reverse Stock Split, the CUSIP number of the common stock has changed to 746962307. The common stock began trading on the QTCQB Venture Market on a reverse split-adjusted basis on October 24, 2025. The Company has submitted its application to relist on the Nasdaq Capital Market. Except as noted, all share, stock option, warrant, and per share

<div align='center'>F-55</div>

#### QT IMAGING HOLDINGS, INC.

### Notes to Condensed Consolidated Financial Statements
<div align='center'>(Unaudited)</div>

amounts throughout these condensed consolidated financial statements have been retroactively adjusted to reflect this Reverse Stock Split.

#### Principles of Consolidation
The condensed consolidated financial statements include the accounts of QT Imaging Holdings, Inc. and its wholly-owned subsidiaries, QT Imaging and QT Ultrasound Labs, Inc. (“QT Labs”). All intercompany balances and transactions are eliminated in consolidation.

#### Liquidity
The Company has incurred net operating losses and negative cash flows from operations since its inception and had an accumulated deficit of $51,635,448 as of September 30, 2025. During the nine months ended September 30, 2025, the Company incurred a net loss of $19,694,921 and used $5,857,572 of cash in operating activities. The Company expects to continue to incur losses, and its ability to achieve and sustain profitability will depend on the achievement of sufficient revenues to support the Company’s cost structure. The Company may never achieve profitability and, unless and until it does, the Company will need to continue to raise additional capital.

On February 26, 2025, 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”) for a term loan in the aggregate principal amount of $10.1 million and repaid the secured note purchase agreement (the “Cable Car Note”) with Funicular Funds, LP (“Cable Car”) issued in February 2024, and fully settled its obligations under the promissory note (the “Yorkville Note”) issued to YA II PN, LTD (“Yorkville”) on March 4, 2024 and terminated the Standby Equity Purchase Agreement (the “SEPA”) with Yorkville by paying $3.0