Who owns Co-Diagnostics (CODX)
Which tracked institutional funds hold CODX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See CODX company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on CODX is one-sided between 2026-Q1 and 2026-Q2: 1 added or opened and 0 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
CODX’s largest tracked holder by dollar value, ARMISTICE CAPITAL, LLC, sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in CODX divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 23 tracked filers holding CODX, 16 increased or opened the position and 5 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in CODX between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 1
- ARMISTICE CAPITAL, LLC$732K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| ARMISTICE CAPITAL, LLC new | 236,000 | $732K | 30.2% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 89,240 | $277K | 11.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 58,275 | $181K | 7.5% | 2026-Q2 |
| Private Advisory Group LLC trimmed | 39,387 | $122K | 5.0% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC new | 31,995 | $99K | 4.1% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP trimmed | 31,239 | $97K | 4.0% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 25,575 | $79K | 3.3% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 19,776 | $61K | 2.5% | 2026-Q2 |
| UBS Group AG added | 16,091 | $50K | 2.1% | 2026-Q2 |
| STATE STREET CORP trimmed | 14,800 | $46K | 1.9% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 12,500 | $39K | 1.6% | 2026-Q2 |
| MORGAN STANLEY added | 2,877 | $9K | 0.4% | 2026-Q2 |
| Smartleaf Asset Management LLC | 133 | $396 | 0.0% | 2026-Q2 |
| Global Retirement Partners, LLC trimmed | 100 | $310 | 0.0% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN | 81 | $251 | 0.0% | 2026-Q2 |
| SBI Securities Co., Ltd. added | 81 | $251 | 0.0% | 2026-Q2 |
| Heritage Wealth Advisors | 17 | $53 | 0.0% | 2026-Q2 |
| OSAIC HOLDINGS, INC. | 10 | $31 | 0.0% | 2026-Q2 |
| FMR LLC trimmed | 7 | $21 | 0.0% | 2026-Q2 |
| NewEdge Advisors, LLC trimmed | 6 | $19 | 0.0% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 3 | $9 | 0.0% | 2026-Q2 |
| HARBOUR INVESTMENTS, INC. | 2 | $6 | 0.0% | 2026-Q2 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO trimmed | 1 | $3 | 0.0% | 2026-Q2 |
| VANGUARD GROUP INC added | 1,909,122 | $323K | 13.3% | 2025-Q4 stale (2 quarters behind) |
| BlackRock, Inc. | 427,440 | $72K | 3.0% | 2025-Q4 stale (2 quarters behind) |
| HRT FINANCIAL LP added | 149,291 | $51K | 2.1% | 2025-Q3 stale (3 quarters behind) |
| Virtu Financial LLC added | 126,524 | $44K | 1.8% | 2025-Q3 stale (3 quarters behind) |
| Bank of New York Mellon Corp | 137,068 | $23K | 1.0% | 2025-Q4 stale (2 quarters behind) |
| GROUP ONE TRADING LLC added | 54,298 | $19K | 0.8% | 2025-Q3 stale (3 quarters behind) |
| Kestra Advisory Services, LLC trimmed | 88,199 | $15K | 0.6% | 2025-Q4 stale (2 quarters behind) |
| SMI Advisory Services, LLC | 28,000 | $11K | 0.4% | 2025-Q3 stale (3 quarters behind) |
| ENVESTNET ASSET MANAGEMENT INC added | 30,840 | $11K | 0.4% | 2025-Q3 stale (3 quarters behind) |
| NORTHERN TRUST CORP | 54,977 | $9K | 0.4% | 2025-Q4 stale (2 quarters behind) |
| Physician Wealth Advisors, Inc. | 28,375 | $8K | 0.3% | 2025-Q2 stale (4 quarters behind) |
| Rathbones Group PLC | 25,000 | $7K | 0.3% | 2025-Q2 stale (4 quarters behind) |
| Summit Financial Wealth Advisors, LLC new | 40,000 | $7K | 0.3% | 2025-Q4 stale (2 quarters behind) |
| TWO SIGMA SECURITIES, LLC added | 30,784 | $5K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| Regal Investment Advisors LLC added | 25,000 | $4K | 0.2% | 2025-Q4 stale (2 quarters behind) |
| Ground Swell Capital, LLC new | 11,517 | $4K | 0.2% | 2025-Q3 stale (3 quarters behind) |
| CITADEL ADVISORS LLC trimmed | 10,589 | $4K | 0.2% | 2025-Q3 stale (3 quarters behind) |
| Triton Wealth Management, PLLC new | 11,111 | $3K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| Tower Research Capital LLC (TRC) added | 13,038 | $2K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| RAYMOND JAMES FINANCIAL INC new | 7,500 | $2K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| SIMPLEX TRADING, LLC trimmed | 9,745 | $2K | 0.1% | 2025-Q4 stale (2 quarters behind) |
| Baader Bank Aktiengesellschaft new | 10,285 | $1K | 0.0% | 2025-Q4 stale (2 quarters behind) |
| CIBC Private Wealth Group LLC | 1,000 | $280 | 0.0% | 2025-Q2 stale (4 quarters behind) |
| BANK OF AMERICA CORP /DE/ added | 504 | $85 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Western Wealth Management, LLC new | 17 | $32 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Advocate Investing Services LLC new | 78 | $13 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| DANSKE BANK A/S new | 7 | $13 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| BNP PARIBAS FINANCIAL MARKETS | 60 | $10 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| CITIGROUP INC trimmed | 1 | $2 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.