Ainos AIMD Insider Ownership

NASDAQ AIMD

$0.90 +0.00 (+0.08%)

As of: Oct 21, 2026 · 2:27 PM EDT

Insider Holdings by Owner

4.71Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

48.87%

■0% pp QoQ

Shares Held by Insiders

3.61Mn

filed for Sep 2026

■0.00% QoQ

Shares Outstanding

7.38Mn

7,384,073 shares

Direct Holdings

3.59Mn

Indirect: 21.95K

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

Over the past year, AIMD insiders bought $21,261 of stock (10.88K shares) and sold $490,033 (245.37K shares) on the open market.

Behind Ainos' open-market trades in the past 12 months were one insider buying and 3 insiders selling.
Among AIMD's insiders, Yao-Chung Chiang (Director) was the top open-market buyer in the past 12 months, with $21,261 of stock purchased (10.88K shares) and the latest purchase on June 5, 2026.
Conversely, Ting-Chuan Lee (Director) was AIMD's largest open-market seller in the past 12 months, with $237,621 of sales (128.29K shares); the latest was on May 26, 2026.
In transactions other than open-market trades, Ainos insiders received 1.35Mn shares in stock awards over the past 12 months.
Per Business Quant data, Ainos insiders hold 3.6Mn shares in total based on their latest Form 4 filings, or 48.72% of the 7.38Mn shares outstanding; that total is down 0.30% from 3.61Mn shares at the end of Q2 2026 and up 62.98% from 2.21Mn shares at the end of Q3 2025.
Direct holdings account for 3.59Mn shares (99.69%) of AIMD's insider total, and indirect holdings through trusts, partnerships and family members for 11.28K shares (0.31%).
Per Business Quant, 10 insiders of AIMD hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
Ainos' three biggest insider holders are Taiwan Carbon Nano Technology Corp (10% owner, 948.92K shares), Ting-Chuan Lee (Director, 807.42K shares) and Chun-Hsien Tsai (CEO, President, Chairman, 710.37K shares), based on their latest Form 4 filings.
Of the shares held by AIMD insiders, 26.37% belong to Taiwan Carbon Nano Technology Corp.
Over the trailing 12 months, 10 insiders reported transactions in AIMD stock across 25 Form 4 filings.
These insider figures for Ainos are based on Form 4 filings through June 9, 2026.

Form 4 Holdings

Insiders Holding AIMD

Insiders 14

Shares held 4.71Mn

Of outstanding 63.75%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Inc Ainos	TenPercentOwner	1,024,307	0	1,024,307	21.8%	21 Apr, 2023
2	Carbon Nano Technology Corp Taiwan	TenPercentOwner	948,925	0	948,925	20.2%	27 May, 2026
3	Chun-Hsien Tsai	Ceo, President, Chairman	829,582	0	829,582	17.6%	17 Apr, 2026
4	Ting-Chuan Lee	Director	826,449	0	826,449	17.6%	27 May, 2026
5	Chun-Jung Tsai	Director	672,660	0	672,660	14.3%	27 May, 2026
6	Wen-Han Chang	Director	101,839	0	101,839	2.2%	26 Nov, 2025
7	Chung-Yi Tsai	Director	91,173	0	91,173	1.9%	26 Nov, 2025
8	Pao-Sheng Wei	Director	91,173	0	91,173	1.9%	26 Nov, 2025
9	Hsin-Liang Christopher Lee	Cfo	75,275	0	75,275	1.6%	26 Nov, 2025
10	Meng Lin Sung	Chief Financial Officer	12,210	0	12,210	0.3%	20 Feb, 2024
11	Test, Inc. Ase	TenPercentOwner	11,777	0	11,777	0.3%	25 Jun, 2025
12	Yao-Chung Chiang	Director	293	11,279	11,572	0.2%	09 Jun, 2026
13	Hui-Lan Wu	Chief Financial Officer	5,991	0	5,991	0.1%	05 Jul, 2023
14	Lawrence K Lin	E.V.P. Of Operations	4,432	0	4,432	0.1%	20 Feb, 2024

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

1,012 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
05 Jun, 2026	Yao-Chung Chiang	Director	Acquired P	3,500	$2.05	$7.17K	11,279	Indirect
03 Jun, 2026	Yao-Chung Chiang	Director	Acquired P	2,000	$2.13	$4.26K	7,779	Indirect
28 May, 2026	Yao-Chung Chiang	Director	Acquired P	250	$2.30	$575	5,779	Indirect
27 May, 2026	Yao-Chung Chiang	Director	Acquired P	2,000	$2.00	$4.00K	5,529	Indirect
26 May, 2026	Carbon Nano Technology Corp Taiwan	TenPercentOwner	Disposed S	41,000	$2.36	$96.76K	948,925	Direct
26 May, 2026	Ting-Chuan Lee	Director	Disposed S	109,988	$1.90	$208.98K	807,417	Direct
22 May, 2026	Chun-Jung Tsai	Director	Disposed S	1,082	$1.55	$1.68K	685,917	Direct
26 May, 2026	Chun-Jung Tsai	Director	Disposed S	27,718	$1.87	$51.83K	658,199	Direct
21 May, 2026	Ting-Chuan Lee	Director	Disposed S	9,000	$1.56	$14.04K	926,707	Direct
22 May, 2026	Ting-Chuan Lee	Director	Disposed S	9,302	$1.57	$14.60K	917,405	Direct
18 May, 2026	Yao-Chung Chiang	Director	Acquired P	500	$1.65	$825	1,329	Indirect
19 May, 2026	Yao-Chung Chiang	Director	Acquired P	2,200	$1.68	$3.70K	3,529	Indirect
05 May, 2026	Yao-Chung Chiang	Director	Acquired P	129	$1.70	$219	829	Indirect
29 Apr, 2026	Yao-Chung Chiang	Director	Acquired P	100	$1.75	$175	500	Indirect
30 Apr, 2026	Yao-Chung Chiang	Director	Acquired P	200	$1.68	$336	700	Indirect
15 Apr, 2026	Ting-Chuan Lee	Director	Acquired A	570,000	$1.61	$917.70K	935,707	Direct
15 Apr, 2026	Chun-Jung Tsai	Director	Acquired A	330,000	$1.61	$531.30K	686,999	Direct
15 Apr, 2026	Chun-Hsien Tsai	Ceo, President, Chairman	Acquired A	300,000	$1.61	$483.00K	710,372	Direct
15 Apr, 2026	Ting-Chuan Lee	Director	Acquired A	570,000	—	—	570,000	Direct
15 Apr, 2026	Chun-Jung Tsai	Director	Acquired A	330,000	—	—	330,000	Direct

Showing 1 to 20 of 1,012 transactions