Ainos, Inc.
Ainos, Inc. (AIMD) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · AIMD · as of Sep 30, 2025
Ownership Breakdown
11
Institutional Holders
▲ 4 vs Q2
$457,623
Total Inst. Value
▲ $441,379 vs Q2
4.53M
Shares Outstanding
freeFloat 46.84%
132,070
13F Shares Held
▲ 126,330 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
AIMD largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
RENAISSANCE TECHNOLOGIES LLC pharmaceutical preparations | 58.6K | 1.29% | 1.29% | $203.05M | Nov 13, 2025 | NEW |
VANGUARD GROUP INC pharmaceutical preparations | 24.8K | 54.34% | 54.34% | $85.76M | Nov 7, 2025 | NEW |
TWO SIGMA INVESTMENTS, LP pharmaceutical preparations | 23.0K | 50.52% | 50.52% | $79.72M | Nov 14, 2025 | NEW |
DRW SECURITIES, LLC pharmaceutical preparations | 17.8K | 39.02% | 39.02% | $61.58M | Nov 14, 2025 | NEW |
BLACKROCK, INC. pharmaceutical preparations | 3.1K | 6.73% | 6.73% | $10.62M | Nov 12, 2025 | — held |
TOWER RESEARCH CAPITAL LLC (TRC) pharmaceutical preparations | 1.8K | 3.97% | 3.97% | $6.27M | Nov 14, 2025 | ▲ 754 |
SENESCHAL ADVISORS, LLC pharmaceutical preparations | 1.8K | 3.95% | 3.95% | $6.24M | Nov 14, 2025 | NEW |
STEWARD PARTNERS INVESTMENT ADVISORY, LLC pharmaceutical preparations | 1.2K | 2.65% | 2.65% | $4.19M | Nov 12, 2025 | — held |
CITIGROUP INC pharmaceutical preparations | 38 | 0.08% | 0.08% | $132,000 | Nov 10, 2025 | NEW |
BANK OF AMERICA CORP /DE/ pharmaceutical preparations | 17 | 0.04% | 0.04% | $59,000 | Feb 3, 2026 | ▲ 9 |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
2
Increased
+763 shares6
New Positions
first time holders0
Decreased
−0 shares2
Sold Out
fully exitedNet shares change (top 50)
+763
+763 / −0
Net new holders
+6
6 new / 2 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
AIMD insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
15
Buy transactions
9
Sell transactions
1.67
Buy/Sell ratio
$1M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
chiang yao-chung director | Jun 3, 2026 | Purchase | 2,000 | $2.13 | $4.3K | 7.8K | Form 4 ↗ |
chiang yao-chung director | May 28, 2026 | Purchase | 250 | $2.30 | $575 | 5.8K | Form 4 ↗ |
chiang yao-chung director | May 27, 2026 | Purchase | 2,000 | $2.00 | $4.0K | 5.5K | Form 4 ↗ |
lee ting-chuan director | May 26, 2026 | Sale | 109,988 | $1.90 | $209.0K | 807.4K | Form 4 ↗ |
Taiwan Carbon Nano Technology Corp 10 percent owner | May 26, 2026 | Sale | 41,000 | $2.36 | $96.8K | 948.9K | Form 4 ↗ |
TSAI CHUN-JUNG director | May 22, 2026 | Sale | 1,082 | $1.55 | $1.7K | 685.9K | Form 4 ↗ |
TSAI CHUN-JUNG director | May 26, 2026 | Sale | 27,718 | $1.87 | $51.8K | 658.2K | Form 4 ↗ |
lee ting-chuan director | May 21, 2026 | Sale | 9,000 | $1.56 | $14.0K | 926.7K | Form 4 ↗ |
lee ting-chuan director | May 22, 2026 | Sale | 9,302 | $1.57 | $14.6K | 917.4K | Form 4 ↗ |
chiang yao-chung director | May 19, 2026 | Purchase | 2,200 | $1.68 | $3.7K | 3.5K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Ainos, Inc. (AIMD) is primarily owned by institutional investors, who hold approximately 2.9% of total shares outstanding. Company insiders own approximately 53.16%, while retail and public investors account for the remaining 43.92%.
The largest institutional shareholder of Ainos, Inc. is RENAISSANCE TECHNOLOGIES LLC, holding approximately 58,600 shares — equal to 1.29% of outstanding shares — as of September 30, 2025.
A total of 11 institutional investors currently hold AIMD stock, with a combined institutional value of approximately $457,623 as of the most recent 13F filing period.
Frequently asked questions
AIMD ownershipAinos, Inc. (AIMD) is primarily owned by institutional investors, who hold approximately 2.9% of shares. The largest shareholder is RENAISSANCE TECHNOLOGIES LLC with a 1.29% stake. Company insiders hold 53.16%. Data sourced from SEC Form 13F as of September 30, 2025.