Ainos, Inc.: 5%+ holders

As of November 6, 2026, 7 holders' latest Schedule 13D or 13G filings report owning 5% or more of Ainos, Inc. The largest reported stake is ScentAI Inc.'s, at 16.5%. 13 filings are on record since October 9, 2025 (Schedule 13D, January 27, 2026).

Chun-Hsien Tsai also filed stake reports on 1 other company ↓

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Key facts

• Filed 2026-04-17 · Holder: Ainos Inc · Percent: 5.76% · SCHEDULE 13D/A
• Filed 2026-04-17 · Holder: Chun-Jung Tsai · Percent: 8.06% · SCHEDULE 13D/A
• Filed 2026-04-17 · Holder: Ting Chuan Lee · Percent: 10.98% · SCHEDULE 13D/A
• Filed 2026-04-15 · Holder: ASE Technology Holding Co., Ltd. · Percent: 8.4% · SCHEDULE 13D/A
• Filed 2026-01-30 · Holder: Taiwan Carbon Nano Technology Corporation · Percent: 13.62% · SCHEDULE 13D/A

Ainos, Inc. has 13 Schedule 13D or 13G filings on record since 2025-10-09. 7 holders' latest filing reports 5% or more of common stock, par value $0.01 per share. Each figure below is the holder's own, as filed, with the filing linked.

Holders

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More on Ainos, Inc. and the records around it.

Ainos, Inc. elsewhere on the record

• Who owns it

Companies that share a holder

• Chun-Hsien Tsai also filed stake reports on 1 other company: AINOS INC (Apr 2026)

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Purpose of Transaction (Item 4)

Ainos Inc

Ainos KY acquired the Common stock in the Issuer for investment purposes. Except as disclosed herein, each of the parties has no plans which relate to or would result in an event described in subparagraphs (a) through (j) of Item 4 of Schedule 13D. However, each of the Parties may, from time to time, engage in discussions, whether initiated by the Parties or another party, concerning proposals for transactions or other arrangements that may relate to or, if consummated, result in an event described in Item 4 of Schedule 13D. Each of the Parties may review and evaluate their respective investments in the Issuer at any time, whether in light of the discussions described in the immediately preceding sentence or otherwise, which may give rise to plans or proposals that, if consummated, would result in one or more of the events described in Item 4 of Schedule 13D. Any such discussion or actions may consider various factors, including, without limitation, the Issuer's business prospects and other developments concerning the Issuer, alternative investment opportunities, general economic conditions, financial and stock market conditions and any other facts and circumstances that may become known to the Parties regarding or related to the matters described in this Statement.Item 4 of the SCHEDULE 13D/A filed 2026-04-17

Taiwan Carbon Nano Technology Corporation

TCNT sold the shares of the issuer's common stock for general operating purposes.Item 4 of the SCHEDULE 13D/A filed 2026-01-30

Ting Chuan Lee

The Reporting Person acquired the 5700,000 RSUs under the Ainos, Inc. 2023 Stock Incentive Plan. Except as described in this Schedule 13D, the Reporting Person do not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, subject to the agreements described herein, the Reporting Person, at any time, and from time to time, may review, reconsider and change their position and/or change their purpose and/or develop such plans and may seek to influence management of the Issuer or the Board of Directors with respect to the business and affairs of the Issuer and may from time to time consider pursuing or proposing such matters with advisors, the Issuer, or other persons.Item 4 of the SCHEDULE 13D/A filed 2026-04-17

Chun-Hsien Tsai

The Reporting Person acquired the 80,000 shares of Common Stock as special stock awards. Although the Reporting Person is the Chief Executive Officer, President, and Chairman of Board, the Reporting Person does not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, subject to the agreements described herein, the Reporting Person, at any time, and from time to time, may review, reconsider and change their position and/or change their purpose and/or develop such plans and may seek to influence management of the Issuer or the Board of Directors with respect to the business and affairs of the Issuer and may from time to time consider pursuing or proposing such matters with advisors, the Issuer, or other persons.Item 4 of the SCHEDULE 13D/A filed 2025-11-28

Chun-Jung Tsai

The Reporting Person acquired the 330,000 RSUs under the Ainos, Inc. 2023 Stock Incentive Plan. Except as described in this Schedule 13D, the Reporting Person do not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, subject to the agreements described herein, the Reporting Person, at any time, and from time to time, may review, reconsider and change their position and/or change their purpose and/or develop such plans and may seek to influence management of the Issuer or the Board of Directors with respect to the business and affairs of the Issuer and may from time to time consider pursuing or proposing such matters with advisors, the Issuer, or other persons.Item 4 of the SCHEDULE 13D/A filed 2026-04-17

ScentAI Inc.

The Reporting Person acquired 1,160,000 shares of the Issuer's common stock for investment and general corporate purposes. Except as described in this Schedule 13D, the Reporting Person do not have any present plans or proposals that relate to or would result in any of the actions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, although, the Reporting Person, at any time, and from time to time, may review, reconsider and change their position and/or change their purpose and/or develop such plans and may seek to influence management of the Issuer or the Board of Directors with respect to the business and affairs of the Issuer and may from time to time consider pursuing or proposing such matters with advisors, the Issuer, or other persons.Item 4 of the SCHEDULE 13D filed 2026-01-27

Timeline

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Questions about who owns Ainos, Inc.

Who owns Ainos, Inc.?

On this page, 7 holders' latest ownership filings report 5% or more of Ainos, Inc.: ScentAI Inc. (16.5%, Schedule 13D, filed 2026-01-27), Taiwan Carbon Nano Technology Corporation (13.62%, Schedule 13D/A, filed 2026-01-30), Ting Chuan Lee (10.98%, Schedule 13D/A, filed 2026-04-17), ASE Technology Holding Co., Ltd. (8.4%, Schedule 13D/A, filed 2026-04-15) and Chun-Jung Tsai (8.06%, Schedule 13D/A, filed 2026-04-17); 2 more are listed above.

Who are the largest shareholders of Ainos, Inc.?

By the share each holder's latest filing reports, the largest holders of Ainos, Inc. on this page are ScentAI Inc. (16.5%), Taiwan Carbon Nano Technology Corporation (13.62%) and Ting Chuan Lee (10.98%).

When did ScentAI Inc. buy into Ainos, Inc.?

The filings give report dates, not purchase dates. The earliest filing from ScentAI Inc. on this page is the Schedule 13D, filed 2026-01-27, reporting 16.5%.

Is this an audit or a full list?

Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 13 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.

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Where this comes from

Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.

Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.

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