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 Mar 31, 2025
Ownership Breakdown
39
Institutional Holders
▼ 4 vs Q4
$1.81M
Total Inst. Value
▼ $2.48M vs Q4
1.12M
Shares Outstanding
freeFloat 93.27%
5.84M
13F Shares Held
▲ 120,287 vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC surgical & medical instruments & apparatus | 1.78M | 5.55% | 5.55% | $551.24M | May 9, 2025 | — held |
PRIVATE ADVISORY GROUP LLC surgical & medical instruments & apparatus | 1.18M | 3.69% | 3.69% | $365.83M | May 8, 2025 | — held |
RENAISSANCE TECHNOLOGIES LLC surgical & medical instruments & apparatus | 550.3K | 1.72% | 1.72% | $170.38M | May 14, 2025 | ▼ 5.3K |
BLACKROCK, INC. surgical & medical instruments & apparatus | 502.8K | 1.57% | 1.57% | $155.66M | May 2, 2025 | ▼ 1.4K |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 342.2K | 1.07% | 1.07% | $105.97M | May 13, 2025 | ▼ 3.3K |
BRIDGEWAY CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 272.9K | 85.15% | 85.15% | $84.49M | May 15, 2025 | — held |
SUSQUEHANNA INTERNATIONAL GROUP, LLP surgical & medical instruments & apparatus | 213.3K | 66.56% | 66.56% | $66.04M | May 14, 2025 | ▼ 45.8K |
CITADEL ADVISORS LLC surgical & medical instruments & apparatus | 189.1K | 59.01% | 59.01% | $58.55M | May 15, 2025 | ▲ 172.7K |
BANK OF NEW YORK MELLON CORP surgical & medical instruments & apparatus | 137.1K | 42.77% | 42.77% | $42.44M | Apr 29, 2025 | — held |
KESTRA ADVISORY SERVICES, LLC surgical & medical instruments & apparatus | 124.5K | 38.86% | 38.86% | $38.55M | May 14, 2025 | ▲ 1.7K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
10
Increased
+309.1K shares6
New Positions
first time holders10
Decreased
−129.2K shares8
Sold Out
fully exitedNet shares change (top 50)
+180.0K
+309.1K / −129.2K
Net new holders
-2
6 new / 8 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 1.78 million shares — equal to 5.55% of outstanding shares — as of March 31, 2025.
A total of 39 institutional investors currently hold CODX stock, with a combined institutional value of approximately $1,809,752 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 5.55% stake. Company insiders hold 6.73%. Data sourced from SEC Form 13F as of March 31, 2025.