John E. Imhoff - 10 Mar 2026 Form 4 Insider Report for GUIDED THERAPEUTICS INC (GTHP)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: GTHP
Reported as of: 10 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 07 Apr 2026, 15:14:37 UTC
Prior SEC filing: 12 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/ John E. Imhoff

Key filing fact

John E. Imhoff filed Form 4 for GUIDED THERAPEUTICS INC (GTHP) on 07 Apr 2026.

Key facts

This page summarizes John E. Imhoff's Form 4 filing for GUIDED THERAPEUTICS INC (GTHP).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 07 Apr 2026, 15:14.

Change

Previous filing in this sequence was filed on 12 Mar 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001348439 Primary reporting owner

Imhoff John E

Relationship: Director, 10%+ Owner
Address: 5835 PEACHTREE CORNERS EAST, SUITE B, PEACHTREE CORNERS
Signature: /s/ John E. Imhoff
Signature date: 07 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

GTHP transaction

Common Stock

Other

Transaction value
Shares: +2,157
Change %: +0.01%
Price
Shares after: 21,055,256
Date: 26 Mar 2026
Ownership: Direct
Footnotes: F2

GTHP transaction

Preferred Series F Stock

Other

Transaction value
Shares: -10
Change %: -100%
Price
Shares after: 0
Date: 26 Mar 2026
Ownership: Direct
Footnotes: F3

GTHP transaction

Common Stock

Other

Transaction value
Shares: +40,000
Change %: +0.19%
Price
Shares after: 21,095,256
Date: 26 Mar 2026
Ownership: Direct
Footnotes: F3

GTHP transaction

Common Stock

Conversion of derivative security

Transaction value
Shares: +157,417
Change %: +0.75%
Price: $0.0700^*
Shares after: 21,252,673
Date: 31 Mar 2026
Ownership: Direct
Footnotes: F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

GTHP transaction Derivative

Stock Options

Award

Transaction value
Shares: +110,000
Change %
Price: $0.000000^*
Shares after: 110,000
Date: 10 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 110,000
Exercise price: $0.2900
Footnotes: F1

GTHP transaction Derivative

Convertible Promissory Note

Conversion of derivative security

Transaction value
Shares: -157,417
Change %: -59%
Price: $0.0700^*
Shares after: 110,000
Date: 31 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 156,086
Exercise price: $0.0700
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

One-fourth of the shares subject to the award vested on March 10, 2026; the remaining shares will vest monthly, starting on June 10, 2026, subject to the reporting person's continued service on each such date, until the award is fully vested on March 10, 2029.

Footnote F2

These shares were issued for payment of accrued dividends on the reporting individual's Series F preferred stock, at a conversion price of $0.2773.

Footnote F3

On March 26, 2026, Mr. Imhoff converted 10 shares of Series F preferred stock into 40,000 shares of common stock. The Series F preferred stock had a stated value of $1,000 and $0.25 conversion price.

Footnote F4

On March 31, 2026, Dr. Imhoff converted $11,019.18 outstanding under a September 25, 2025 Convertible Promissory Note into 157,417 shares of common stock at a conversion price of $0.07 per share. The amount converted consisted of $10,000 of principal and $1,019.18 of accrued interest. Following the reported conversion, $110,000 of principal remains outstanding under the convertible promissory note. Upon the occurrence of an event of default, the remaining balance is convertible into common stock at a variable conversion price determined in accordance with the terms of the note.