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  4. [Form 4] Ainos, Inc. Insider Trading Activity

Ainos (AIMD) director buys 2,000 shares in indirect open-market trade

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

Rhea-AI Filing Summary

Ainos, Inc. director Chiang Yao-Chung reported an open-market purchase of 2,000 shares of the company’s common stock at $2.13 per share. The shares are held indirectly through the director’s spouse, bringing indirect holdings to 7,779 shares. In addition, the director directly owns 90,880 shares of Ainos common stock as previously disclosed.

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Insider chiang yao-chung
Role null
Bought 2,000 shs ($4K)
Type Security Shares Price Value
Purchase Common Stock 2,000 $2.13 $4K
Holdings After Transaction: Common Stock — 7,779 shares (Indirect, By Spouse)
Footnotes (1)
  1. [object Object]
Open-market purchase 2,000 shares Common Stock bought on 2026-06-03
Purchase price $2.13/share Open-market purchase of Ainos common stock
Indirect holdings after trade 7,779 shares Common Stock held indirectly by spouse after purchase
Direct holdings (previously disclosed) 90,880 shares Common Stock directly owned by the director
open-market purchase financial
"transaction_action: "open-market purchase""
An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.
indirect ownership financial
"ownership_type: "indirect" and nature_of_ownership: "By Spouse""
Common Stock financial
"security_title: "Common Stock""
Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.
transaction code "P" financial
"transaction_code_description: "Purchase in open market or private transaction""
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Form 4 Insider Transactions: What Each Field Means →
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*
chiang yao-chung
(Last)(First)(Middle)
10F-2 NO. 66, SHENGYI 5TH RD.
(Street)
ZHUBEI CITY302
(City)(State)(Zip)
TAIWAN
(Country)		2. Issuer Name and Ticker or Trading Symbol
Ainos, Inc. [ AIMD ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/03/2026		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 Stock06/03/2026P2,000A$2.137,779(1)IBy Spouse
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
Explanation of Responses:
1. In addition to the shares indirectly held, the Reporting Person directly owns 90,880 shares of the Issuer's common stock as previously disclosed.
/s/ Chun-Hsien Tsai by POA for Yao-Chung Chiang06/05/2026
** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Ainos (AIMD) disclose in this Form 4?

Ainos director Chiang Yao-Chung reported buying 2,000 shares of common stock at $2.13 per share. The transaction was an open-market purchase, increasing indirect ownership through the director’s spouse to 7,779 shares, alongside 90,880 shares held directly.

At what price did the Ainos (AIMD) director buy shares in this Form 4?

The Ainos director purchased 2,000 shares at $2.13 per share in an open-market transaction. This filing shows the exact purchase price and confirms the buy was made in the market, not through a stock option exercise or grant.

How many Ainos (AIMD) shares does the director own after this transaction?

After this transaction, the director indirectly owns 7,779 Ainos common shares through a spouse. A footnote states the director also directly holds 90,880 shares, previously disclosed, giving a clearer picture of the overall reported share position.

Is the Ainos (AIMD) director’s Form 4 transaction direct or indirect ownership?

The reported 2,000-share purchase is classified as indirect ownership, held "By Spouse." The filing separately notes that, in addition to these indirectly held shares, the director directly owns 90,880 Ainos common shares from earlier disclosed holdings.

What does the transaction code 'P' mean in the Ainos (AIMD) Form 4?

The transaction code "P" indicates an open-market or private purchase of common stock. In this Ainos filing, it reflects a 2,000-share buy at $2.13 per share, distinguishing it from option exercises, gifts, or tax-withholding dispositions.