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Guided Therapeutics (GTHP) director converts debt, gains stock options

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

GUIDED THERAPEUTICS INC director and 10% owner John E. Imhoff reported several equity-related transactions. On March 31, 2026, he converted $11,019.18 outstanding under a Convertible Promissory Note into 157,417 shares of common stock at a $0.07 conversion price, while $110,000 of principal remains outstanding and is still convertible under the note’s terms.

On March 26, 2026, he converted 10 shares of Series F preferred stock into 40,000 common shares, and also received 2,157 common shares as payment of accrued dividends on that preferred stock at a $0.2773 conversion price. After these transactions, his direct common stock holdings increased to 21,252,673 shares.

Separately, on March 10, 2026, Imhoff was granted 110,000 stock options for common stock at a $0.29 exercise price. One-fourth vested on March 10, 2026, with the remainder vesting monthly starting June 10, 2026 until fully vested on March 10, 2029.

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Insider Imhoff John E
Role Director, 10% Owner
Type Security Shares Price Value
Conversion Convertible Promissory Note 157,417 $0.07 $11K
Conversion Common Stock 157,417 $0.07 $11K
Other Common Stock 2,157 $0.00 --
Other Preferred Series F Stock 10 $0.00 --
Other Common Stock 40,000 $0.00 --
Grant/Award Stock Options 110,000 $0.00 --
Holdings After Transaction: Convertible Promissory Note — 110,000 shares (Direct); Common Stock — 21,252,673 shares (Direct); Preferred Series F Stock — 0 shares (Direct); Stock Options — 110,000 shares (Direct)
Footnotes (1)
  1. 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. 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. 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. 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.
Note conversion amount $11,019.18 Converted under Convertible Promissory Note on March 31, 2026
Shares from note conversion 157,417 shares Common stock at $0.07 conversion price on March 31, 2026
Remaining note principal $110,000 Principal still outstanding under the Convertible Promissory Note
Preferred conversion shares 40,000 shares Common stock from 10 Series F preferred shares on March 26, 2026
Dividend payment shares 2,157 shares Common stock issued for accrued dividends at $0.2773 per share
Common shares after transactions 21,252,673 shares Direct common stock holdings following reported March 2026 actions
Stock options granted 110,000 options Options for common stock at $0.29 exercise price, granted March 10, 2026
Option vesting end date March 10, 2029 Award fully vests by this date, with monthly vesting starting June 10, 2026
Convertible Promissory Note financial
"converted $11,019.18 outstanding under a September 25, 2025 Convertible Promissory Note"
A convertible promissory note is a loan a company takes now that can later be turned into shares instead of being repaid in cash. Think of it as lending money with the option to accept ownership in the business down the road; that matters to investors because it affects who gets paid first, how much ownership existing shareholders keep, and the company’s future valuation and cash needs. Terms such as conversion price, interest and maturity determine the financial impact.
Series F preferred stock financial
"converted 10 shares of Series F preferred stock into 40,000 shares of common stock"
Series F preferred stock is a class of company shares that gives holders priority over common shareholders for dividend payments and for getting money back if the company is sold or liquidated, much like a ticket that moves you to the front of the line. These shares often carry a fixed dividend and special rights—sometimes including conversion into common stock—so investors consider them when weighing income, downside protection and potential ownership dilution.
conversion price financial
"at a conversion price of $0.07 per share"
The conversion price is the fixed price at which a convertible security, like a bond or preferred stock, can be exchanged for shares of common stock. It acts like a set rate that determines how many shares an investor can receive if they choose to convert their investment. This helps investors understand the value and potential benefits of converting their securities into company shares.
stock options financial
"Imhoff was granted 110,000 stock options for common stock at a $0.29 exercise price"
Stock options are agreements that give a person the right to buy or sell a company's stock at a specific price within a certain time frame. They are often used as a reward or incentive, similar to a coupon that can be used later if the stock price rises, allowing the holder to make a profit.
accrued dividends financial
"shares were issued for payment of accrued dividends on the reporting individual's Series F preferred stock"
Accrued dividends are payments a company owes to shareholders that have been earned or officially declared but not yet paid; think of them as an IOU the company has for past dividend obligations. They matter to investors because they represent a near-term claim on a company’s cash, affect the company’s reported liabilities and value, and can be especially important when assessing income reliability or priority in a payout situation.
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Imhoff John E

(Last)(First)(Middle)
5835 PEACHTREE CORNERS EAST
SUITE B

(Street)
PEACHTREE CORNERS GEORGIA 30092

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
GUIDED THERAPEUTICS INC [ GTHP ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock03/26/2026J(2)2,157A(2)21,055,256D
Preferred Series F Stock03/26/2026J(3)10D(3)0D
Common Stock03/26/2026J(3)40,000A(3)21,095,256D
Common Stock03/31/2026C(4)157,417A$0.0721,252,673D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Options$0.2903/10/2026A110,000 (1)03/09/2036Common Stock110,000$0.00110,000D
Convertible Promissory Note$0.0703/31/2026C(4)157,417(4)03/31/202602/28/2027Common Stock156,086(4)$0.07110,000D
Explanation of Responses:
1. 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.
2. 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.
3. 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.
4. 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.
Remarks:
/s/ John E. Imhoff04/07/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did GTHP director John E. Imhoff do with his convertible promissory note?

He converted $11,019.18 under a September 25, 2025 Convertible Promissory Note into 157,417 common shares at $0.07 per share, while $110,000 of principal remains outstanding and continues to be convertible under the note’s terms.

How many Guided Therapeutics (GTHP) shares does Imhoff hold after these transactions?

After the reported March 2026 transactions, Imhoff directly holds 21,252,673 shares of Guided Therapeutics common stock. This total reflects the added shares from his note conversion, preferred stock conversion, and dividend-related issuance disclosed in the filing.

What stock option grant did Imhoff receive from Guided Therapeutics (GTHP)?

On March 10, 2026, Imhoff received 110,000 stock options for Guided Therapeutics common stock with a $0.29 exercise price. One-fourth vested immediately, and the remaining options vest monthly from June 10, 2026 until full vesting on March 10, 2029.

How was Guided Therapeutics (GTHP) Series F preferred stock converted by Imhoff?

On March 26, 2026, Imhoff converted 10 shares of Series F preferred stock into 40,000 common shares at a stated value of $1,000 per preferred share and a $0.25 conversion price, eliminating his remaining Series F preferred holdings in this filing.