Richard P. Blumberg - 25 Feb 2026 Form 4 Insider Report for GUIDED THERAPEUTICS INC (GTHP)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: GTHP
Reported as of: 25 Feb 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 05 May 2026, 18:21:13 UTC
Prior SEC filing: 05 Sep 2025
Source filing: View source filing
Reporting owner signature: /s/ Richard P. Blumberg

Key filing fact

Richard P. Blumberg filed Form 4 for GUIDED THERAPEUTICS INC (GTHP) on 05 May 2026.

Key facts

This page summarizes Richard P. Blumberg's Form 4 filing for GUIDED THERAPEUTICS INC (GTHP).
12 reported transactions and 5 derivative rows are listed below.
Accepted by SEC: 05 May 2026, 18:21.

Change

Previous filing in this sequence was filed on 05 Sep 2025.
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 0001486345 Primary reporting owner

Blumberg Richard P.

Relationship: Director, 10%+ Owner
Address: 5835 PEACHTREE CORNERS EAST, SUITE B, PEACHTREE CORNERS
Signature: /s/ Richard P. Blumberg
Signature date: 05 May 2026

Reported non-derivative transactions

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

GTHP transaction

Common Stock

Options Exercise

Transaction value
Shares: +1,000,000
Change %: +13%
Price
Shares after: 8,924,180
Date: 25 Feb 2026
Ownership: Direct
Footnotes: F1

GTHP transaction

Common Stock

Other

Transaction value
Shares: +56,093
Change %: +0.63%
Price
Shares after: 8,980,273
Date: 26 Mar 2026
Ownership: Direct
Footnotes: F4

GTHP transaction

Preferred Series F Stock

Other

Transaction value
Shares: -260
Change %: -100%
Price
Shares after: 0
Date: 26 Mar 2026
Ownership: Direct
Footnotes: F5

GTHP transaction

Common Stock

Other

Transaction value
Shares: +1,040,000
Change %: +12%
Price
Shares after: 10,020,273
Date: 26 Mar 2026
Ownership: Direct
Footnotes: F5

GTHP transaction

Common Stock

Other

Transaction value
Shares: +19,038
Change %: +0.19%
Price
Shares after: 10,039,311
Date: 26 Mar 2026
Ownership: Direct
Footnotes: F6

GTHP transaction

Preferred Series F-2 Stock

Other

Transaction value
Shares: -88
Change %: -100%
Price
Shares after: 0
Date: 26 Mar 2026
Ownership: Direct
Footnotes: F7

GTHP transaction

Common Stock

Other

Transaction value
Shares: +352,000
Change %: +3.5%
Price
Shares after: 10,391,311
Date: 26 Mar 2026
Ownership: Direct
Footnotes: F7

Reported derivative securities

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

GTHP transaction Derivative

Warrants

Disposed to Issuer

Transaction value
Shares: -1,000,000
Change %: -100%
Price
Shares after: 0
Date: 25 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,000,000
Exercise price: $0.6500
Footnotes: F1

GTHP transaction Derivative

Warrants

Award

Transaction value
Shares: +1,000,000
Change %
Price
Shares after: 1,000,000
Date: 25 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,000,000
Exercise price: $0.6500
Footnotes: F1

GTHP transaction Derivative

Warrants

Options Exercise

Transaction value
Shares: -1,000,000
Change %: -100%
Price: $0.2000^*
Shares after: 0
Date: 25 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,000,000
Exercise price: $0.2000
Footnotes: F1

GTHP transaction Derivative

Warrants

Expiration (or cancellation) of long derivative position with value received

Transaction value
Shares: -900,000
Change %: -25%
Price: $0.3000^*
Shares after: 2,700,000
Date: 01 Mar 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 900,000
Exercise price: $0.3000
Footnotes: F2

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: F3

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 7 footnotes

Footnote F1

During February 2026, Mr. Blumberg entered into an exchange agreement pursuant to which 1,000,000 warrants to purchase shares of common stock with an exercise price of $0.50 were exchanged for 1,000,000 warrants with an exercise price of $0.20. The newly issued warrants were immediately exercised upon payment of $200,000. In connection with the exchange agreement, the expiration date of 1,000,000 warrants with an exercise price of $0.65 was extended for one year, until September 1, 2027.

Footnote F2

900,000 warrants to purchase shares of common stock with an exercise price of $0.30, with an issuance date of March 1, 2023, expired on March 1, 2026, without being exercised.

Footnote F3

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 F4

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 F5

On March 26, 2026, Mr. Blumberg converted 260 shares of Series F preferred stock into 1,040,000 shares of common stock. The Series F preferred stock had a stated value of $1,000 and $0.25 conversion price.

Footnote F6

These shares were issued for payment of accrued dividends on the reporting individual's Series F-2 preferred stock, at a conversion price of $0.2773.

Footnote F7

On March 26, 2026, Mr. Blumberg converted 88 shares of Series F-2 preferred stock into 352,000 shares of common stock. The Series F-2 preferred stock had a stated value of $1,000 and $0.25 conversion price.