Alta Partners LLC - 05 May 2026 SCHEDULE 13G/A Report for QT IMAGING HOLDINGS, INC. Common Stock, par value $0.0001 per share (QTIH)

Filing Manager: Alta Partners LLC
Reporting Manager: Alta Partners LLC
Security: QT IMAGING HOLDINGS, INC. Common Stock, par value $0.0001 per share
Symbol: QTIH
Shares outstanding: 12,577,721 shares
Disclosed Ownership: 540,842 shares
Ownership: 4.3%
Form type: SCHEDULE 13G/A
Filing time: 08 May 2026, 16:43:58 UTC
Date of event: 05 May 2026
Previous filing: 28 Aug 2025
SEC: View on sec.gov

Key filing fact

Alta Partners LLC disclosed 4.3% ownership in QT IMAGING HOLDINGS, INC. Common Stock, par value $0.0001 per share (QTIH) on 05 May 2026.

Key facts

Alta Partners LLC filed SCHEDULE 13G/A for QT IMAGING HOLDINGS, INC. Common Stock, par value $0.0001 per share (QTIH).
Disclosed ownership: 4.3%.
Date of event: 05 May 2026.

This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
You can verify ownership claims directly against the original SEC filing.

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

Reporting persons

Names, ownership, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Alta Partners LLC	4.3%	540,842	540,842	0	/s/ Steven Cohen	Steven Cohen, Managing Member

CIK / CUSIP context first

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