Co-Diagnostics, Inc.
Co-Diagnostics, Inc. (CODX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CODX · as of Sep 30, 2025
Ownership Breakdown
36
Institutional Holders
$1.93M
Total Inst. Value
▲ $492,335 vs Q2
1.12M
Shares Outstanding
freeFloat 93.27%
5.62M
13F Shares Held
▲ 466,900 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
CODX largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC surgical & medical instruments & apparatus | 1.71M | 4.50% | 4.50% | $586.85M | Nov 7, 2025 | ▼ 27.3K |
PRIVATE ADVISORY GROUP LLC surgical & medical instruments & apparatus | 1.18M | 3.12% | 3.12% | $406.48M | Nov 10, 2025 | — held |
RENAISSANCE TECHNOLOGIES LLC surgical & medical instruments & apparatus | 867.5K | 2.29% | 2.29% | $298.43M | Nov 13, 2025 | ▲ 306.5K |
BLACKROCK, INC. surgical & medical instruments & apparatus | 427.4K | 1.13% | 1.13% | $147.04M | Nov 12, 2025 | — held |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 320.0K | 84.45% | 84.45% | $110.11M | Nov 12, 2025 | — held |
HRT FINANCIAL LP surgical & medical instruments & apparatus | 149.3K | 39.40% | 39.40% | $51.00M | Nov 14, 2025 | ▲ 136.0K |
BANK OF NEW YORK MELLON CORP surgical & medical instruments & apparatus | 137.1K | 36.17% | 36.17% | $47.15M | Nov 3, 2025 | — held |
KESTRA ADVISORY SERVICES, LLC surgical & medical instruments & apparatus | 134.7K | 35.55% | 35.55% | $46.34M | Nov 14, 2025 | ▲ 6.0K |
VIRTU FINANCIAL LLC surgical & medical instruments & apparatus | 126.5K | 33.39% | 33.39% | $44.00M | Nov 14, 2025 | ▲ 100.9K |
UBS GROUP AG surgical & medical instruments & apparatus | 118.2K | 31.21% | 31.21% | $40.68M | Nov 13, 2025 | ▲ 117.0K |
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
11
Increased
+760.3K shares3
New Positions
first time holders9
Decreased
−256.2K shares5
Sold Out
fully exitedNet shares change (top 50)
+504.1K
+760.3K / −256.2K
Net new holders
+0
3 new / 5 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CODX insider trading · insider activity
Source: SEC Form 4
7
Buy transactions
10
Sell transactions
0.70
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 |
|---|---|---|---|---|---|---|---|
Egan Dwight H Chief Executive Officer | May 23, 2026 | Award | 4,584 | — | — | 29.5K | Form 4 ↗ |
Egan Dwight H Chief Executive Officer | May 23, 2026 | D-Return | 1,633 | $5.07 | $8.3K | 27.9K | Form 4 ↗ |
Brown Brian Lee Chief Financial Officer | May 23, 2026 | Award | 3,750 | — | — | 23.7K | Form 4 ↗ |
Brown Brian Lee Chief Financial Officer | May 23, 2026 | D-Return | 1,350 | $5.07 | $6.8K | 22.4K | Form 4 ↗ |
Abbott Richard David President | May 23, 2026 | Award | 1,890 | — | — | 4.1K | Form 4 ↗ |
Abbott Richard David President | May 23, 2026 | D-Return | 680 | $5.07 | $3.4K | 3.4K | Form 4 ↗ |
Murphy Edward L. director | May 23, 2026 | Award | 1,695 | — | — | 11.1K | Form 4 ↗ |
SERBIN RICHARD S director | May 23, 2026 | Award | 1,695 | — | — | 10.8K | Form 4 ↗ |
Durenard Eugene director | May 23, 2026 | Award | 1,695 | — | — | 10.7K | Form 4 ↗ |
NELSON JAMES B director | May 23, 2026 | Award | 1,695 | — | — | 10.7K | 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
Co-Diagnostics, Inc. (CODX) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 6.73%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Co-Diagnostics, Inc. is VANGUARD GROUP INC, holding approximately 1.71 million shares — equal to 4.50% of outstanding shares — as of September 30, 2025.
A total of 36 institutional investors currently hold CODX stock, with a combined institutional value of approximately $1,933,651 as of the most recent 13F filing period.
Frequently asked questions
CODX ownershipCo-Diagnostics, Inc. (CODX) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is VANGUARD GROUP INC with a 4.50% stake. Company insiders hold 6.73%. Data sourced from SEC Form 13F as of September 30, 2025.