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

Ainos (AIMD) director adds shares in small open-market spouse purchase

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 the company’s common stock through an indirect holding. On May 5, 2026, a spouse-related account bought 129 shares at $1.70 per share, bringing this indirect position to 829 shares.

In addition to these indirectly held shares, the reporting person also directly owns 90,880 shares of Ainos common stock as previously disclosed, indicating that the newly reported transaction is small compared with the existing direct holdings.

Positive

  • None.

Negative

  • None.
Insider chiang yao-chung
Role null
Bought 129 shs ($219.30)
Type Security Shares Price Value
Purchase Common Stock 129 $1.70 $219.30
Holdings After Transaction: Common Stock — 829 shares (Indirect, By Spouse)
Footnotes (1)
  1. [object Object]
Shares purchased 129 shares Open-market purchase on May 5, 2026
Purchase price $1.70 per share Open-market transaction
Indirect holdings after trade 829 shares Spouse-related account following transaction
Direct holdings 90,880 shares Direct ownership noted in footnote
Net buy shares 129 shares Net effect of reported Form 4 transactions
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" for the spouse-held shares"
By Spouse financial
"nature_of_ownership: "By Spouse""
Form 4 regulatory
"INSIDER FILING DATA (Form 4)"
Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.
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 CITYF5302
(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)
05/05/2026		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 Stock05/05/2026P129A$1.7829(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 Chiang05/07/2026
** 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 reported that director Chiang Yao-Chung’s spouse-related account bought 129 shares of common stock in an open-market purchase at $1.70 per share on May 5, 2026, increasing that indirect holding to 829 shares following the transaction.

Was the Ainos (AIMD) Form 4 transaction a buy or a sell?

The Form 4 shows a buy transaction. An account classified as “By Spouse” executed an open-market purchase of 129 Ainos common shares at $1.70 each, raising the indirectly held balance associated with the reporting person to 829 shares after the trade.

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

After the reported trade, the spouse-related indirect account holds 829 Ainos common shares. A footnote states the reporting person also directly owns 90,880 Ainos common shares, previously disclosed, highlighting that most of the director’s exposure is through direct ownership.

How is ownership characterized in this Ainos (AIMD) insider filing?

The purchased 129 shares are reported as indirect ownership with the nature of ownership described as “By Spouse.” The Form 4 also notes that, separate from these indirect holdings, the reporting person directly owns 90,880 Ainos common shares, as disclosed in prior filings.

Does this Ainos (AIMD) Form 4 include any derivative securities activity?

The Form 4 data indicate no derivative securities transactions. The filing lists only a non-derivative open-market purchase of Ainos common stock and shows an empty derivative summary, meaning no options, warrants, or other derivative positions are reported in this particular filing.