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$AMST

$1.32 -$0.07 (5.04%)

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Insider Transactions

Insider Transaction Summary

Mark N. Tompkins

2,043,103 shares

Net: 0 B/S: -

Ann Marie Sastry

875,431 shares

Net: 0 B/S: -

J MICHAEL LOSH

90,363 shares

Net: +116,769 B/S: ∞

GILBERT S OMENN

74,783 shares

Net: +112,339 B/S: ∞

George Parmer

67,887 shares

Net: +112,339 B/S: ∞

Anthony M. Barkett

46,032 shares

Net: 0 B/S: -

Richard Ogawa

46,032 shares

Net: 0 B/S: -

Matthew Kern

40,000 shares

Net: 0 B/S: -

Barbie Brewer

30,322 shares

Net: +115,662 B/S: ∞

Insider Name	Current Shares	Net Change (1yr)	Buy/Sell Ratio
Mark N. Tompkins	2,043,103	0	-
Ann Marie Sastry	875,431	0	-
J MICHAEL LOSH	90,363	+116,769	∞
GILBERT S OMENN	74,783	+112,339	∞
George Parmer	67,887	+112,339	∞
Anthony M. Barkett	46,032	0	-
Richard Ogawa	46,032	0	-
Matthew Kern	40,000	0	-
Barbie Brewer	30,322	+115,662	∞

Individual Transactions

March 31, 2026

GILBERT S OMENN

Grant/Award Acquisition

Change: +6,522

Price: $0.00

Shares: 74,783

Value: +$0

J MICHAEL LOSH

Grant/Award Acquisition

Change: +7,880

Price: $0.00

Shares: 90,363

Value: +$0

George Parmer

Grant/Award Acquisition

Change: +6,522

Price: $0.00

Shares: 67,887

Value: +$0

Barbie Brewer

Grant/Award Acquisition

Change: +7,541

Price: $0.00

Shares: 30,322

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
GILBERT S OMENN	Apr 01	Grant/Award Acquisition (A) Compensation/Award	74,783	+6,522	$0.00	+$0
J MICHAEL LOSH	Apr 01	Grant/Award Acquisition (A) Compensation/Award	90,363	+7,880	$0.00	+$0
George Parmer	Apr 01	Grant/Award Acquisition (A) Compensation/Award	67,887	+6,522	$0.00	+$0
Barbie Brewer	Apr 01	Grant/Award Acquisition (A) Compensation/Award	30,322	+7,541	$0.00	+$0

March 07, 2026

Barbie Brewer

Option Exercise/Conversion

Change: +41,322

Price: $0.00

Shares: 135,977

Value: +$0

George Parmer

Option Exercise/Conversion

Change: +41,322

Price: $0.00

Shares: 323,060

Value: +$0

J MICHAEL LOSH

Option Exercise/Conversion

Change: +41,322

Price: $0.00

Shares: 138,200

Value: +$0

GILBERT S OMENN

Option Exercise/Conversion

Change: +41,322

Price: $0.00

Shares: 143,699

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Barbie Brewer	Mar 10	Option Exercise/Conversion (M) Compensation/Award	135,977	+41,322	$0.00	+$0
George Parmer	Mar 10	Option Exercise/Conversion (M) Compensation/Award	323,060	+41,322	$0.00	+$0
J MICHAEL LOSH	Mar 10	Option Exercise/Conversion (M) Compensation/Award	138,200	+41,322	$0.00	+$0
GILBERT S OMENN	Mar 10	Option Exercise/Conversion (M) Compensation/Award	143,699	+41,322	$0.00	+$0

February 06, 2026

Barbie Brewer

Grant/Award Acquisition

Change: +49,751

Price: $0.00

Shares: 49,751

Value: +$0

George Parmer

Grant/Award Acquisition

Change: +49,751

Price: $0.00

Shares: 49,751

Value: +$0

J MICHAEL LOSH

Grant/Award Acquisition

Change: +49,751

Price: $0.00

Shares: 49,751

Value: +$0

GILBERT S OMENN

Grant/Award Acquisition

Change: +49,751

Price: $0.00

Shares: 49,751

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Barbie Brewer	Feb 10	Grant/Award Acquisition (A) Compensation/Award	49,751	+49,751	$0.00	+$0
George Parmer	Feb 10	Grant/Award Acquisition (A) Compensation/Award	49,751	+49,751	$0.00	+$0
J MICHAEL LOSH	Feb 10	Grant/Award Acquisition (A) Compensation/Award	49,751	+49,751	$0.00	+$0
GILBERT S OMENN	Feb 10	Grant/Award Acquisition (A) Compensation/Award	49,751	+49,751	$0.00	+$0

December 31, 2025

Barbie Brewer

Grant/Award Acquisition

Change: +7,341

Price: $0.00

Shares: 22,781

Value: +$0

George Parmer

Grant/Award Acquisition

Change: +6,349

Price: $0.00

Shares: 61,365

Value: +$0

J MICHAEL LOSH

Grant/Award Acquisition

Change: +7,672

Price: $0.00

Shares: 82,483

Value: +$0

GILBERT S OMENN

Grant/Award Acquisition

Change: +6,349

Price: $0.00

Shares: 68,261

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Barbie Brewer	Jan 05	Grant/Award Acquisition (A) Compensation/Award	22,781	+7,341	$0.00	+$0
George Parmer	Jan 05	Grant/Award Acquisition (A) Compensation/Award	61,365	+6,349	$0.00	+$0
J MICHAEL LOSH	Jan 05	Grant/Award Acquisition (A) Compensation/Award	82,483	+7,672	$0.00	+$0
GILBERT S OMENN	Jan 05	Grant/Award Acquisition (A) Compensation/Award	68,261	+6,349	$0.00	+$0

September 30, 2025

Barbie Brewer

Grant/Award Acquisition

Change: +4,549

Price: $0.00

Shares: 15,440

Value: +$0

George Parmer

Grant/Award Acquisition

Change: +3,934

Price: $0.00

Shares: 55,016

Value: +$0

J MICHAEL LOSH

Grant/Award Acquisition

Change: +4,754

Price: $0.00

Shares: 74,811

Value: +$0

GILBERT S OMENN

Grant/Award Acquisition

Change: +3,934

Price: $0.00

Shares: 61,912

Value: +$0

Insider	Filing Date	Transaction	Shares	Change	Price	Value
Barbie Brewer	Oct 02	Grant/Award Acquisition (A) Compensation/Award	15,440	+4,549	$0.00	+$0
George Parmer	Oct 02	Grant/Award Acquisition (A) Compensation/Award	55,016	+3,934	$0.00	+$0
J MICHAEL LOSH	Oct 02	Grant/Award Acquisition (A) Compensation/Award	74,811	+4,754	$0.00	+$0
GILBERT S OMENN	Oct 02	Grant/Award Acquisition (A) Compensation/Award	61,912	+3,934	$0.00	+$0