Imhoff John E

Insider

Director, 10% Owner

Trades at: GTHP

30D 90D 1Y

Net shares · 365d

+333.3K

333.3K buy · 0 sell

Net value · 365d

$30.0K

$30.0K in · $0 out

Sentiment · 365d

Net buying

100% buying · 0% selling

Open-market trades · 365d

333.3K buy · 0 sell

Net buy / sell volume (all companies)

Tap or hover the chart for daily net volume. Green = net buying, red = net selling.

All transactions

Show open-market only

GTHP Exercise·C
Mar 31, 26

Director, 10% Owner

$11.0K

157.4K sh · $0.07

Own New
GTHP Exercise·C
Mar 31, 26

Director, 10% Owner

$11.0K

157.4K sh · $0.07

Own +1%
GTHP Other·J
Mar 26, 26

Director, 10% Owner

—

40.0K sh
GTHP Other·J
Mar 26, 26

Director, 10% Owner

—

10 sh
GTHP Other·J
Mar 26, 26

Director, 10% Owner

—

2.2K sh
GTHP Grant·A
Mar 10, 26

Director, 10% Owner

$0

110.0K sh

Own New
GTHP Exercise·C
Feb 27, 26

Director,TenPercentOwner

$10.9K

156.1K sh · $0.07

Own New
GTHP Other·J
Feb 27, 26

Director,TenPercentOwner

—

100 sh
GTHP Other·J
Feb 27, 26

Director,TenPercentOwner

—

400.0K sh
GTHP Exercise·C
Feb 27, 26

Director,TenPercentOwner

$10.9K

156.1K sh · $0.07

Own +1%
GTHP Other·J
Feb 25, 26

Director,TenPercentOwner

—

500.0K sh
GTHP Other·J
Feb 25, 26

Director,TenPercentOwner

—

500.0K sh
GTHP Other·J
Feb 25, 26

Director,TenPercentOwner

—

500.0K sh
GTHP Other·J
Feb 25, 26

Director,TenPercentOwner

—

500.0K sh
GTHP Exercise·X
Feb 25, 26

Director,TenPercentOwner

—

500.0K sh

Own New
GTHP Exercise·X
Feb 25, 26

Director,TenPercentOwner

—

500.0K sh

Own +3%
GTHP Exercise·C
Feb 2, 26

Director,TenPercentOwner

—

312.7K sh

Own New
GTHP Exercise·C
Feb 2, 26

Director,TenPercentOwner

$21.9K

312.7K sh · $0.07

Own +2%
GTHP Other·J
Jan 5, 26

Director,TenPercentOwner

—

25.3K sh
GTHP Exercise·C
Dec 18, 25

Director,TenPercentOwner

—

195.5K sh

Own New
GTHP Exercise·C
Dec 18, 25

Director,TenPercentOwner

$13.7K

195.5K sh · $0.07

Own +1%
GTHP Buy·P
Aug 29, 25

Director,TenPercentOwner

—

166.7K sh

Own +667%
GTHP Buy·P
Aug 29, 25

Director,TenPercentOwner

$30.0K

166.7K sh · $0.18

Own +1%
GTHP Other·J
Aug 21, 25

Director,TenPercentOwner

—

300 sh
GTHP Other·J
Aug 21, 25

Director,TenPercentOwner

—

104.4K sh
GTHP Other·J
Aug 21, 25

Director,TenPercentOwner

—

1.2M sh

Date▾	Ticker	Role	Type	Shares	Own Δ	Price	Value
Mar 31, 2026	GTHP	Director, 10% Owner	Exercise C	157.4K	New	$0.07	$11.0K
Mar 31, 2026	GTHP	Director, 10% Owner	Exercise C	157.4K	+1%	$0.07	$11.0K
Mar 26, 2026	GTHP	Director, 10% Owner	Other J	40.0K	—	—	—
Mar 26, 2026	GTHP	Director, 10% Owner	Other J	10	—	—	—
Mar 26, 2026	GTHP	Director, 10% Owner	Other J	2.2K	—	—	—
Mar 10, 2026	GTHP	Director, 10% Owner	Grant A	110.0K	New	—	$0
Feb 27, 2026	GTHP	Director,TenPercentOwner	Exercise C	156.1K	New	$0.07	$10.9K
Feb 27, 2026	GTHP	Director,TenPercentOwner	Other J	100	—	—	—
Feb 27, 2026	GTHP	Director,TenPercentOwner	Other J	400.0K	—	—	—
Feb 27, 2026	GTHP	Director,TenPercentOwner	Exercise C	156.1K	+1%	$0.07	$10.9K
Feb 25, 2026	GTHP	Director,TenPercentOwner	Other J	500.0K	—	—	—
Feb 25, 2026	GTHP	Director,TenPercentOwner	Other J	500.0K	—	—	—
Feb 25, 2026	GTHP	Director,TenPercentOwner	Other J	500.0K	—	—	—
Feb 25, 2026	GTHP	Director,TenPercentOwner	Other J	500.0K	—	—	—
Feb 25, 2026	GTHP	Director,TenPercentOwner	Exercise X	500.0K	New	—	—
Feb 25, 2026	GTHP	Director,TenPercentOwner	Exercise X	500.0K	+3%	—	—
Feb 2, 2026	GTHP	Director,TenPercentOwner	Exercise C	312.7K	New	—	—
Feb 2, 2026	GTHP	Director,TenPercentOwner	Exercise C	312.7K	+2%	$0.07	$21.9K
Jan 5, 2026	GTHP	Director,TenPercentOwner	Other J	25.3K	—	—	—
Dec 18, 2025	GTHP	Director,TenPercentOwner	Exercise C	195.5K	New	—	—
Dec 18, 2025	GTHP	Director,TenPercentOwner	Exercise C	195.5K	+1%	$0.07	$13.7K
Aug 29, 2025	GTHP	Director,TenPercentOwner	Buy P	166.7K	+667%	—	—
Aug 29, 2025	GTHP	Director,TenPercentOwner	Buy P	166.7K	+1%	$0.18	$30.0K
Aug 21, 2025	GTHP	Director,TenPercentOwner	Other J	300	—	—	—
Aug 21, 2025	GTHP	Director,TenPercentOwner	Other J	104.4K	—	—	—
Aug 21, 2025	GTHP	Director,TenPercentOwner	Other J	1.2M	—	—	—

About Imhoff John E

This profile aggregates every SEC Form 4 insider transaction reported by Imhoff John E across all companies they trade. Open-market purchases (code P) and sales (code S) are the highest-signal, discretionary trades; grants (A), option exercises (M) and gifts (G) reflect compensation rather than conviction and carry no market price. Figures cover the selected period and update as new filings are ingested.