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QT Imaging Holdings, Inc.

QTI
Exchange
Nasdaq
Industry
Electromedical & Electrotherapeutic Apparatus
SEC CIK
0001844505

No open-market purchases or sales by QT Imaging Holdings, Inc. insiders were filed in the last 90 days; 29 institutions reported holding it in 13F filings for Q2 2026, worth $13.3M in total; no superinvestor holds it.

Other share classesQTIWW

Holders of 5% or more of QTI

Holders whose latest Schedule 13D or 13G filing reports 5% or more of QT Imaging Holdings, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of QTI
HolderLatest formStakeChangeFirst filedLatest filingFiling
Alyeska Investment Group, L.P.13G9.99%1.18M sharesNewFeb 17, 20261 filingFeb 17, 2026SEC
Lynrock Lake LP13G/A9.70%1.15M shares+0.10 ppfrom 9.60%Nov 14, 20243 filingsFeb 17, 2026SEC
Dinu Raluca13D/A7.00%2.04M shares+1.60 ppfrom 5.40%Apr 2, 20252 filingsApr 30, 2025SEC
Katz Avi S13D/A6.20%1.81M shares+1.40 ppfrom 4.80%Jul 3, 20247 filingsApr 30, 2025SEC
Kakkis Emil D13G5.10%1.40M sharesNewMar 26, 20251 filingMar 26, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

34 Schedule 13D and 13G filings on QT Imaging Holdings, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on QTI
Filed (ET)FilerFormStakeChangeEvent dateFiling
May 8, 20264:43 PM ETAlta Partners LLC13G/A4.30%540.8K shares−1.30 ppfrom 5.60%Below 5%May 5, 2026SEC
Feb 17, 20264:48 PM ETAlyeska Investment Group, L.P.and 2 others13G9.99%1.18M sharesNewDec 31, 2025SEC
Feb 17, 20264:13 PM ETLynrock Lake LPand 2 others13G/A9.70%1.15M shares+0.10 ppfrom 9.60%Dec 31, 2025SEC
Aug 28, 20254:05 PM ETAlta Partners LLC13G5.60%1.70M sharesNewAug 27, 2025SEC
May 15, 20254:11 PM ETLynrock Lake LPand 2 others13G/A9.60%2.67M shares–Mar 31, 2025SEC
Apr 30, 20259:26 PM ETDinu Raluca13D/A7.00%2.04M shares+1.60 ppfrom 5.40%Apr 24, 2025SEC
Apr 30, 20259:26 PM ETKatz Avi S13D/A6.20%1.81M shares+1.40 ppfrom 4.80%Apr 24, 2025SEC
Apr 2, 20254:15 PM ETDinu Raluca13D5.40%1.54M sharesNewMar 21, 2025SEC
Apr 2, 20258:30 AM ETKatz Avi Sand 1 other13D4.80%1.36M shares–Below 5%Mar 21, 2025SEC
Mar 26, 20256:11 PM ETKakkis Emil D13G5.10%1.40M sharesNewMar 17, 2025SEC
Nov 22, 2024Katz Avi S13D/AOld format–––SEC
Nov 14, 2024Lynrock Lake LP13GOld format–New–SEC
Sep 13, 2024Katz Avi S13D/AOld format–––SEC
Jul 17, 2024Katz Avi S13D/AOld format–––SEC
Jul 10, 2024Katz Avi S13D/AOld format–––SEC
Jul 3, 2024Katz Avi S13DOld format–New–SEC
Mar 18, 2024Klock John C Jr13DOld format–New–SEC
Mar 18, 2024GigAcquisitions5, LLC13DOld format–New–SEC
Feb 22, 2024Shaolin Capital Management LLC13G/AOld format–––SEC
Feb 14, 2024Meteora Capital, LLC13GOld format–New–SEC
Feb 12, 2024Polar Asset Management Partners Inc.13G/AOld format–––SEC
Feb 14, 2023Shaolin Capital Management LLC13GOld format–New–SEC
Feb 14, 2023D. E. Shaw & Co, L.P.13G/AOld format–––SEC
Feb 10, 2023Polar Asset Management Partners Inc.13GOld format–New–SEC
Jan 30, 2023Weiss Asset Management LP13G/AOld format–––SEC
Jan 25, 2023Highbridge Capital Management LLC13G/AOld format–––SEC
Jan 9, 2023Millennium Management LLC13G/AOld format–––SEC
Jul 6, 2022Millennium Management LLC13GOld format–New–SEC
Feb 22, 2022D. E. Shaw & Co, L.P.13GOld format–New–SEC
Feb 11, 2022Weiss Asset Management LP13GOld format–New–SEC
Feb 3, 2022Highbridge Capital Management LLC13G/AOld format–––SEC
Feb 2, 2022Space Summit Capital LLC13G/AOld format–––SEC
Dec 23, 2021Highbridge Capital Management LLC13GOld format–New–SEC
Oct 1, 2021Space Summit Capital LLC13GOld format–New–SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell QT Imaging Holdings, Inc. shares.

No Form 144 notices for QT Imaging Holdings, Inc. are on file.