Amesite AMST Insider Ownership

NASDAQ AMST

$0.79 -0.04 (-5.14%)

At close: Oct 19, 2026 · 4:00 PM EDT

Insider Holdings by Owner

2.03Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

44.62%

■0% pp QoQ

Shares Held by Insiders

2.92Mn

filed for Sep 2026

■0.00% QoQ

Shares Outstanding

6.55Mn

6,549,851 shares

Direct Holdings

1.77Mn

Indirect: 1.16Mn

Net Shares Traded (QoQ)

no net change in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Across the past 12 months, open-market trades by Amesite insiders were all purchases, totaling $599,999 (418.12K shares).

By number of insiders, Amesite saw 2 insiders buy on the open market over the past 12 months and none sell.
Among Amesite insiders, George Parmer (Director) led open-market buying over the past 12 months with $349,999 of purchases (243.9K shares); the latest was on April 28, 2026.
Outside the open market, Amesite insiders acquired 82.64K shares through option exercises and conversions over the past 12 months.
Per Business Quant, AMST insiders together hold 2.91Mn shares based on their latest Form 4 filings, or 44.43% of the 6.55Mn shares outstanding; that total is down 0.44% from 2.92Mn shares at the end of Q2 2026.
Direct holdings account for 1.75Mn shares (60.23%) of AMST's insider total, and indirect holdings through trusts, partnerships and family members for 1.16Mn shares (39.77%).
AMST's insider total is spread across 5 insiders who have filed a Form 4 in the past two years.
Amesite's three largest insider shareholders, based on their latest Form 4 filings, are Ann Marie Sastry (Chief Executive Officer, 1.93Mn shares), George Parmer (Director, 566.96K shares) and Gilbert S. Omenn (Director, 143.7K shares).
Ann Marie Sastry holds 66.16% of the combined insider position in Amesite.
In the last 12 months, 27 Form 4 filings with transactions in AMST stock came from 6 insiders.
These insider figures for Amesite are based on Form 4 filings through October 2, 2026.

Form 4 Holdings

Insiders Holding AMST

Insiders 5

Shares held 2.03Mn

Of outstanding 31.06%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Ann Marie Sastry	Chief Executive Officer	1,049,647	0	1,049,647	51.6%	18 May, 2026
2	George Parmer	Director	566,962	0	566,962	27.9%	18 May, 2026
3	Gilbert S Omenn	Director	0	143,699	143,699	7.1%	10 Mar, 2026
4	J Michael Losh	Director	0	138,200	138,200	6.8%	10 Mar, 2026
5	Barbie Brewer	Director	135,977	0	135,977	6.7%	10 Mar, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

180 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
30 Sep, 2026	George Parmer	Director	Acquired A	12,121	$0.00	$0	89,031	Direct
30 Sep, 2026	Gilbert S Omenn	Director	Acquired A	12,121	$0.00	$0	95,927	Indirect
30 Sep, 2026	Barbie Brewer	Director	Acquired A	14,015	$0.00	$0	54,769	Direct
30 Sep, 2026	J Michael Losh	Director	Acquired A	14,646	$0.00	$0	115,911	Indirect
30 Jun, 2026	Gilbert S Omenn	Director	Acquired A	9,023	$0.00	$0	83,806	Indirect
30 Jun, 2026	J Michael Losh	Director	Acquired A	10,902	$0.00	$0	101,265	Indirect
30 Jun, 2026	George Parmer	Director	Acquired A	9,023	$0.00	$0	76,910	Direct
29 Jun, 2026	Sarah Berman	Chief Financial Officer	Acquired A	10,000	$0.00	$0	10,000	Direct
30 Jun, 2026	Barbie Brewer	Director	Acquired A	10,432	$0.00	$0	40,754	Direct
28 Apr, 2026	Ann Marie Sastry	Chief Executive Officer	Acquired P	174,216	$1.44	$250.00K	1,049,647	Direct
28 Apr, 2026	George Parmer	Director	Acquired P	243,902	$1.44	$350.00K	566,962	Direct
28 Apr, 2026	George Parmer	Director	Acquired P	243,902	$0.00	$0	243,902	Direct
28 Apr, 2026	Ann Marie Sastry	Chief Executive Officer	Acquired P	174,216	$0.00	$0	174,216	Direct
28 Apr, 2026	Ann Marie Sastry	Chief Executive Officer	Acquired P	174,216	$0.00	$0	174,216	Direct
28 Apr, 2026	George Parmer	Director	Acquired P	243,902	$0.00	$0	243,902	Direct
31 Mar, 2026	Gilbert S Omenn	Director	Acquired A	6,522	$0.00	$0	74,783	Indirect
31 Mar, 2026	Barbie Brewer	Director	Acquired A	7,541	$0.00	$0	30,322	Direct
31 Mar, 2026	George Parmer	Director	Acquired A	6,522	$0.00	$0	67,887	Direct
31 Mar, 2026	J Michael Losh	Director	Acquired A	7,880	$0.00	$0	90,363	Indirect
07 Mar, 2026	Gilbert S Omenn	Director	Acquired M	41,322	—	—	143,699	Indirect

Showing 1 to 20 of 180 transactions