Co-Diagnostics (CODX)
Co-Diagnostics on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as surgical & medical instruments & apparatus.
656K
Short interest
settlement 2026-10-15
1.4
Days to cover
+0.2 days vs prior
52.8%
Short share of volume
2026-11-02
888
Fails to deliver
settlement 2026-10-13
Thu 12 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-11-02.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 15 October 2026, short interest in CODX is 656,373 shares, up 351,403 shares over the last month. Over the last 48 readings it ranged from 6,368 shares (27 February 2026) to 2,410,821 shares (31 October 2025). At the reported average volume of 464K shares a day that is 1.4 days to cover.
Embed this chart.The embed keeps its attribution line.
<iframe src="https://xoomar.com/embed/stocks/codx" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-10-15 | 656,373 | +56.7% | 464,407 | 1.41 |
| 2026-09-30 | 418,934 | +37.4% | 350,758 | 1.19 |
| 2026-09-15 | 304,970 | +42.1% | 130,016 | 2.35 |
| 2026-08-31 | 214,608 | -40.8% | 383,382 | 1.00 |
| 2026-08-14 | 362,631 | +4.0% | 337,609 | 1.07 |
| 2026-07-31 | 348,657 | +1.7% | 411,971 | 1.00 |
| 2026-07-15 | 342,796 | +172.9% | 921,457 | 1.00 |
| 2026-06-30 | 125,605 | +4.9% | 357,079 | 1.00 |
| 2026-06-15 | 119,689 | -65.7% | 1,199,824 | 1.00 |
| 2026-05-29 | 349,389 | +79.9% | 34,775,288 | 1.00 |
| 2026-05-15 | 194,179 | +104.9% | 1,222,985 | 1.00 |
| 2026-04-30 | 94,771 | +107.4% | 127,204 | 1.00 |
| 2026-04-15 | 45,702 | -72.9% | 137,210 | 1.00 |
| 2026-03-31 | 168,619 | +195.7% | 5,178,682 | 1.00 |
| 2026-03-13 | 57,017 | +795.4% | 490,931 | 1.00 |
| 2026-02-27 | 6,368 | -53.2% | 13,014 | 1.00 |
| 2026-02-13 | 13,599 | -19.1% | 17,304 | 1.00 |
| 2026-01-30 | 16,804 | -76.7% | 40,242 | 1.00 |
| 2026-01-15 | 72,076 | -96.8% | 256,149 | 1.00 |
| 2025-12-31 | 2,252,057 | +248.5% | 2,320,782 | 1.00 |
| 2025-12-15 | 646,208 | -43.3% | 1,424,156 | 1.00 |
| 2025-11-28 | 1,138,960 | -33.3% | 1,954,774 | 1.00 |
| 2025-11-14 | 1,708,244 | -29.1% | 3,198,527 | 1.00 |
| 2025-10-31 | 2,410,821 | +2053.5% | 100,961,739 | 1.00 |
| 2025-10-15 | 111,948 | -74.6% | 1,218,553 | 1.00 |
| 2025-09-30 | 440,573 | -44.6% | 25,613,616 | 1.00 |
| 2025-09-15 | 795,088 | -41.6% | 409,923 | 1.94 |
| 2025-08-29 | 1,361,749 | +166.2% | 1,568,691 | 1.00 |
| 2025-08-15 | 511,469 | -14.3% | 8,155,058 | 1.00 |
| 2025-07-31 | 596,954 | -29.3% | 957,341 | 1.00 |
| 2025-07-15 | 844,026 | +197.8% | 1,707,256 | 1.00 |
| 2025-06-30 | 283,384 | +0.5% | 427,622 | 1.00 |
| 2025-06-13 | 282,095 | -27.9% | 413,780 | 1.00 |
| 2025-05-30 | 391,378 | +135.6% | 663,731 | 1.00 |
| 2025-05-15 | 166,099 | +19.5% | 486,593 | 1.00 |
| 2025-04-30 | 139,008 | -4.0% | 97,762 | 1.42 |
| 2025-04-15 | 144,735 | -11.0% | 181,861 | 1.00 |
| 2025-03-31 | 162,551 | -19.7% | 371,872 | 1.00 |
| 2025-03-14 | 202,412 | +4.5% | 138,999 | 1.46 |
| 2025-02-28 | 193,713 | -16.7% | 297,783 | 1.00 |
| 2025-02-14 | 232,642 | -7.1% | 88,578 | 2.63 |
| 2025-01-31 | 250,355 | -4.0% | 86,843 | 2.88 |
| 2025-01-15 | 260,820 | -19.4% | 472,863 | 1.00 |
| 2024-12-31 | 323,460 | +39.0% | 230,730 | 1.40 |
| 2024-12-13 | 232,649 | +1.9% | 121,902 | 1.91 |
| 2024-11-29 | 228,278 | -0.3% | 196,298 | 1.16 |
| 2024-11-15 | 229,088 | +9.8% | 92,780 | 2.47 |
| 2024-10-31 | 208,704 | -7.8% | 68,542 | 3.04 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 2 November 2026, the short share of CODX volume is 52.8%, down 14.8 points over the last five sessions. Over the last 30 readings it ranged from 34.1% (21 October 2026) to 72.9% (9 October 2026). The latest reading is in line with the 30-session average of 53.7%, on 330K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-11-02 | 174K | 330K | 52.8% | 0 |
| 2026-10-30 | 89K | 137K | 64.9% | 8,302 |
| 2026-10-29 | 126K | 220K | 57.5% | 4,536 |
| 2026-10-28 | 71K | 152K | 46.4% | 12,261 |
| 2026-10-27 | 202K | 379K | 53.3% | 18,008 |
| 2026-10-26 | 51K | 76K | 67.6% | 0 |
| 2026-10-23 | 110K | 173K | 63.5% | 3,013 |
| 2026-10-22 | 156K | 344K | 45.2% | 11,177 |
| 2026-10-21 | 182K | 533K | 34.1% | 0 |
| 2026-10-20 | 140K | 228K | 61.4% | 2,402 |
| 2026-10-19 | 19K | 41K | 46.5% | 874 |
| 2026-10-16 | 113K | 202K | 55.9% | 1,183 |
| 2026-10-15 | 83K | 153K | 54.4% | 18,285 |
| 2026-10-14 | 455K | 680K | 66.8% | 97,534 |
| 2026-10-13 | 206K | 343K | 60.0% | 5,843 |
| 2026-10-12 | 258K | 485K | 53.3% | 232 |
| 2026-10-09 | 59K | 81K | 72.9% | 0 |
| 2026-10-08 | 42K | 93K | 44.8% | 4,765 |
| 2026-10-07 | 60K | 104K | 57.6% | 0 |
| 2026-10-06 | 276K | 560K | 49.2% | 675 |
| 2026-10-05 | 328K | 710K | 46.1% | 1,181 |
| 2026-10-02 | 26K | 59K | 43.5% | 503 |
| 2026-10-01 | 48K | 95K | 50.5% | 0 |
| 2026-09-30 | 14K | 35K | 39.5% | 120 |
| 2026-09-29 | 43K | 61K | 71.6% | 0 |
| 2026-09-28 | 38K | 112K | 34.3% | 2,652 |
| 2026-09-25 | 55K | 107K | 51.7% | 15 |
| 2026-09-24 | 152K | 255K | 59.8% | 1,597 |
| 2026-09-23 | 22K | 49K | 44.0% | 763 |
| 2026-09-22 | 128K | 206K | 62.3% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 13 October 2026, the fails-to-deliver balance in CODX is 888 shares, up 563 shares over the last settlement date. Over the last 30 readings it ranged from 9 shares (17 July 2026) to 354,491 shares (2 July 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-10-13 | 888 | $1.25 | $1K |
| 2026-10-06 | 325 | $1.10 | $358 |
| 2026-10-02 | 3,326 | $1.08 | $4K |
| 2026-09-18 | 44,485 | $0.94 | $42K |
| 2026-09-17 | 14,347 | $0.94 | $13K |
| 2026-09-16 | 19,301 | $1.14 | $22K |
| 2026-09-14 | 301 | $1.12 | $337 |
| 2026-08-19 | 3,831 | $1.26 | $5K |
| 2026-08-17 | 14,534 | $1.40 | $20K |
| 2026-08-14 | 34,357 | $1.49 | $51K |
| 2026-08-12 | 90 | $1.49 | $134 |
| 2026-07-29 | 46,052 | $1.41 | $65K |
| 2026-07-28 | 1,047 | $2.04 | $2K |
| 2026-07-27 | 3,738 | $2.10 | $8K |
| 2026-07-23 | 23,043 | $2.28 | $53K |
| 2026-07-17 | 9 | $2.49 | $22 |
| 2026-07-13 | 3,448 | $2.61 | $9K |
| 2026-07-10 | 1,674 | $2.64 | $4K |
| 2026-07-09 | 3,107 | $2.64 | $8K |
| 2026-07-07 | 1,788 | $2.73 | $5K |
| 2026-07-06 | 61,990 | $2.99 | $185K |
| 2026-07-02 | 354,491 | $3.08 | $1.1M |
| 2026-07-01 | 3,193 | $3.10 | $10K |
| 2026-06-30 | 3,753 | $2.98 | $11K |
| 2026-06-26 | 82 | $3.05 | $250 |
| 2026-06-24 | 23,934 | $3.23 | $77K |
| 2026-06-23 | 22,781 | $3.12 | $71K |
| 2026-06-22 | 37,170 | $3.37 | $125K |
| 2026-06-18 | 65,600 | $3.33 | $218K |
| 2026-06-17 | 40,009 | $3.84 | $154K |
Insider trades
SEC Form 4, newest first. JSONNo open-market insider trades were reported for CODX in the last 90 days. The most recent filings are listed below. Latest filing: Durenard Eugene (Director) on 2026-05-23.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-05-23 | Durenard Eugene | Director | Grant | 2K | $0.00 | $0 | 11K |
| 2026-05-23 | Murphy Edward L. | Director | Grant | 2K | $0.00 | $0 | 11K |
| 2026-05-23 | Egan Dwight H | Chief Executive Officer | Returned to company | 2K | $5.07 | $8K | 28K |
| 2026-05-23 | Egan Dwight H | Chief Executive Officer | Grant | 5K | $0.00 | $0 | 30K |
| 2026-05-23 | NELSON JAMES B | Director | Grant | 2K | $0.00 | $0 | 11K |
| 2026-05-23 | SERBIN RICHARD S | Director | Grant | 2K | $0.00 | $0 | 11K |
| 2026-05-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 1K | $5.07 | $7K | 22K |
| 2026-05-23 | Brown Brian Lee | Chief Financial Officer | Grant | 4K | $0.00 | $0 | 24K |
| 2026-05-23 | Abbott Richard David | President | Returned to company | 680 | $5.07 | $3K | 3K |
| 2026-05-23 | Abbott Richard David | President | Grant | 2K | $0.00 | $0 | 4K |
| 2025-11-23 | Durenard Eugene | Director | Grant | 57K | $0.00 | $0 | 269K |
| 2025-11-23 | Murphy Edward L. | Director | Grant | 57K | $0.00 | $0 | 282K |
| 2025-11-23 | Egan Dwight H | Chief Executive Officer | Returned to company | 50K | $0.35 | $17K | 748K |
| 2025-11-23 | Egan Dwight H | Chief Executive Officer | Grant | 163K | $0.00 | $0 | 798K |
| 2025-11-23 | NELSON JAMES B | Director | Grant | 57K | $0.00 | $0 | 269K |
| 2025-11-23 | SERBIN RICHARD S | Director | Grant | 57K | $0.00 | $0 | 272K |
| 2025-11-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 41K | $0.35 | $14K | 599K |
| 2025-11-23 | Brown Brian Lee | Chief Financial Officer | Grant | 134K | $0.00 | $0 | 640K |
| 2025-11-23 | Abbott Richard David | President | Returned to company | 17K | $0.35 | $6K | 66K |
| 2025-11-23 | Abbott Richard David | President | Grant | 57K | $0.00 | $0 | 83K |
| 2025-05-23 | NELSON JAMES B | Director | Grant | 48K | $0.00 | $0 | 212K |
| 2025-05-23 | Durenard Eugene | Director | Grant | 48K | $0.00 | $0 | 212K |
| 2025-05-23 | MURPHY TED | Director | Grant | 48K | $0.00 | $0 | 224K |
| 2025-05-23 | SERBIN RICHARD S | Director | Grant | 48K | $0.00 | $0 | 214K |
| 2025-05-23 | Abbott Richard David | President | Grant | 20K | $0.00 | $0 | 34K |
| 2025-05-23 | Abbott Richard David | President | Returned to company | 7K | $0.24 | $2K | 27K |
| 2025-05-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 48K | $0.24 | $12K | 506K |
| 2025-05-23 | Brown Brian Lee | Chief Financial Officer | Grant | 134K | $0.00 | $0 | 554K |
| 2025-05-23 | Egan Dwight H | Chief Executive Officer | Returned to company | 52K | $0.24 | $12K | 634K |
| 2025-05-23 | Egan Dwight H | Chief Executive Officer | Grant | 163K | $0.00 | $0 | 686K |
| 2024-11-23 | SERBIN RICHARD S | Director | Grant | 48K | $0.00 | $0 | 166K |
| 2024-11-23 | NELSON JAMES B | Director | Grant | 48K | $0.00 | $0 | 163K |
| 2024-11-23 | Durenard Eugene | Director | Grant | 48K | $0.00 | $0 | 163K |
| 2024-11-23 | MURPHY TED | Director | Grant | 48K | $0.00 | $0 | 176K |
| 2024-11-23 | Egan Dwight H | Chief Executive Officer | Returned to company | 50K | $1.01 | $50K | 523K |
| 2024-11-23 | Egan Dwight H | Chief Executive Officer | Grant | 163K | $0.00 | $0 | 573K |
| 2024-11-23 | Abbott Richard David | President | Grant | 20K | $0.00 | $0 | 20K |
| 2024-11-23 | Abbott Richard David | President | Returned to company | 6K | $1.01 | $6K | 14K |
| 2024-11-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 41K | $1.01 | $41K | 420K |
| 2024-11-23 | Brown Brian Lee | Chief Financial Officer | Grant | 134K | $0.00 | $0 | 461K |
| 2024-05-23 | Durenard Eugene | Director | Grant | 30K | $0.00 | $0 | 115K |
| 2024-05-23 | SERBIN RICHARD S | Director | Grant | 30K | $0.00 | $0 | 118K |
| 2024-05-23 | NELSON JAMES B | Director | Grant | 30K | $0.00 | $0 | 115K |
| 2024-05-23 | MURPHY TED | Director | Grant | 30K | $0.00 | $0 | 128K |
| 2024-05-23 | Egan Dwight H | Chief Executive Officer | Returned to company | 42K | $1.09 | $46K | 367K |
| 2024-05-23 | Egan Dwight H | Chief Executive Officer | Grant | 138K | $0.00 | $0 | 409K |
| 2024-05-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 36K | $1.09 | $39K | 291K |
| 2024-05-23 | Brown Brian Lee | Chief Financial Officer | Grant | 113K | $0.00 | $0 | 327K |
| 2023-11-23 | Egan Dwight H | Chief Executive Officer | Returned to company | 46K | $1.26 | $58K | 271K |
| 2023-11-23 | Egan Dwight H | Chief Executive Officer | Grant | 151K | $0.00 | $0 | 317K |
| 2023-11-23 | Brown Brian Lee | Chief Financial Officer | Grant | 118K | $0.00 | $0 | 249K |
| 2023-11-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 36K | $1.26 | $46K | 213K |
| 2023-11-23 | MURPHY TED | Director | Grant | 30K | $0.00 | $0 | 98K |
| 2023-11-23 | NELSON JAMES B | Director | Grant | 30K | $0.00 | $0 | 85K |
| 2023-11-23 | SERBIN RICHARD S | Director | Grant | 30K | $0.00 | $0 | 88K |
| 2023-11-23 | Durenard Eugene | Director | Grant | 30K | $0.00 | $0 | 85K |
| 2023-05-23 | NELSON JAMES B | Director | Grant | 18K | $0.00 | $0 | 55K |
| 2023-05-23 | SERBIN RICHARD S | Director | Grant | 18K | $0.00 | $0 | 58K |
| 2023-05-23 | MURPHY TED | Director | Grant | 18K | $0.00 | $0 | 68K |
| 2023-05-23 | Durenard Eugene | Director | Grant | 18K | $0.00 | $0 | 55K |
| 2023-05-23 | Egan Dwight H | Chief Executive Officer | Returned to company | 32K | $1.32 | $42K | 166K |
| 2023-05-23 | Egan Dwight H | Chief Executive Officer | Grant | 105K | $0.00 | $0 | 198K |
| 2023-05-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 26K | $1.32 | $34K | 131K |
| 2023-05-23 | Brown Brian Lee | Chief Financial Officer | Grant | 81K | $0.00 | $0 | 157K |
| 2023-03-20 | Brown Brian Lee | Chief Financial Officer | Buy | 3K | $1.90 | $6K | 76K |
| 2023-01-08 | MURPHY TED | Director | Grant | 13K | $0.00 | $0 | 49K |
| 2023-01-08 | SERBIN RICHARD S | Director | Grant | 13K | $0.00 | $0 | 39K |
| 2023-01-08 | NELSON JAMES B | Director | Grant | 13K | $0.00 | $0 | 37K |
| 2023-01-08 | Durenard Eugene | Director | Grant | 13K | $0.00 | $0 | 37K |
| 2022-11-23 | Egan Dwight H | Chief Executive Officer | Returned to company | 32K | $3.47 | $111K | 93K |
| 2022-11-23 | Egan Dwight H | Chief Executive Officer | Grant | 79K | $0.00 | $0 | 125K |
| 2022-11-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 18K | $3.47 | $63K | 73K |
| 2022-11-23 | Brown Brian Lee | Chief Financial Officer | Grant | 59K | $0.00 | $0 | 91K |
| 2022-11-23 | Durenard Eugene | Director | Grant | 12K | $0.00 | $0 | 24K |
| 2022-11-23 | NELSON JAMES B | Director | Grant | 12K | $0.00 | $0 | 24K |
| 2022-11-23 | MURPHY TED | Director | Grant | 12K | $0.00 | $0 | 37K |
| 2022-11-23 | SERBIN RICHARD S | Director | Grant | 12K | $0.00 | $0 | 27K |
| 2022-05-23 | Egan Dwight H | Chief Executive Officer | Grant | 33K | $0.00 | $0 | 58K |
| 2022-05-23 | Egan Dwight H | Chief Executive Officer | Returned to company | 12K | $4.99 | $59K | 46K |
| 2022-05-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 8K | $4.99 | $39K | 32K |
| 2022-05-23 | Brown Brian Lee | Chief Financial Officer | Grant | 22K | $0.00 | $0 | 40K |
| 2022-01-08 | Durenard Eugene | Director | Grant | 13K | $0.00 | $0 | 13K |
| 2022-01-08 | MURPHY TED | Director | Grant | 13K | $0.00 | $0 | 25K |
| 2022-01-08 | NELSON JAMES B | Director | Grant | 13K | $0.00 | $0 | 13K |
| 2022-01-08 | SERBIN RICHARD S | Director | Grant | 13K | $0.00 | $0 | 15K |
| 2021-11-23 | Brown Brian Lee | Chief Financial Officer | Returned to company | 7K | $8.44 | $56K | 18K |
| 2021-11-23 | Brown Brian Lee | Chief Financial Officer | Grant | 22K | $0.00 | $0 | 25K |
| 2021-11-23 | Egan Dwight H | Chief Executive Officer | Tax withholding | 16K | $8.44 | $131K | 25K |
| 2021-11-23 | Egan Dwight H | Chief Executive Officer | Grant | 33K | $0.00 | $0 | 40K |
| 2021-09-08 | Durenard Eugene | Director | Sell | 2K | $10.46 | $21K | 0 |
| 2021-05-24 | BENSON REED L | General Counsel | Grant | 5K | $0.00 | $0 | 5K |
| 2021-05-24 | BENSON REED L | General Counsel | Tax withholding | 1K | $7.90 | $11K | 3K |
| 2021-05-24 | Egan Dwight H | Chief Executive Officer | Tax withholding | 6K | $7.90 | $44K | 7K |
| 2021-05-24 | Egan Dwight H | Chief Executive Officer | Grant | 13K | $0.00 | $0 | 13K |
| 2021-05-24 | Brown Brian Lee | Chief Financial Officer | Grant | 5K | $0.00 | $0 | 5K |
| 2021-05-24 | Brown Brian Lee | Chief Financial Officer | Tax withholding | 2K | $7.90 | $12K | 3K |
| 2021-05-19 | BENSON REED L | General Counsel | Sell | 1 | $8.53 | $9 | 0 |
| 2021-05-19 | BENSON REED L | General Counsel | Exercise or conversion | 1 | $1.10 | $1 | 1 |
| 2021-05-19 | BENSON REED L | General Counsel | Sell | 11K | $8.54 | $93K | 97K |
| 2021-05-19 | BENSON REED L | General Counsel | Exercise or conversion | 97K | $2.63 | $256K | 108K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON2 holders report 5% or more of CODX in their latest filing, all on Schedule 13G (passive). The largest reported stake is Steven Boyd at 10.0% of the class (559,706 shares), filed 2026-08-14 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-14 | 13G | Steven Boydparent holding company, individual | 560K | 10.0% | 2026-06-30 |
| 2026-08-14 | 13G | Armistice Capital, LLCinvestment adviser, other entity | 560K | 10.0% | 2026-06-30 |
| 2026-08-10 | 13G/Ano. 1 | JANE STREET GROUP, LLCparent holding company | 89K | 1.7% | 2026-06-30 |
| 2026-08-10 | 13G/Ano. 1 | Jane Street Global Trading, LLCother entity | 59K | 1.1% | 2026-06-30 |
| 2026-08-10 | 13G/Ano. 1 | Jane Street Capital, LLCbroker-dealer | 31K | 0.6% | 2026-06-30 |
| 2026-02-11 | 13G/Ano. 1 | Alto Opportunity Master Fund, SPC - Segregated Master Portfolio Bcorporation | 0 | 0.0% | 2025-12-31 |
| 2026-02-11 | 13G/Ano. 1 | Ayrton Capital LLCinvestment adviser, corporation | 0 | 0.0% | 2025-12-31 |
| 2026-02-11 | 13G/Ano. 1 | Waqas Khatriindividual | 0 | 0.0% | 2025-12-31 |
| 2025-10-30 | 13G/Ano. 3 | Orca Capital AGcorporation | 2.2M | 3.7% | 2025-10-28 |
| 2025-10-30 | 13G/Ano. 4 | The Vanguard Groupinvestment adviser | 1.7M | 3.5% | 2025-09-30 |
13F holders
Tracked managers holding CODX at their latest 13F. JSON2 of the 30 tracked managers held CODX at their latest 13F, $138K in total at quarter-end prices. Millennium Management is the largest at $99K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 0 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Millennium Management | 2026-06-30 | 32K | $99K | 0.00% | new |
| Renaissance Technologies | 2026-06-30 | 13K | $39K | 0.00% | new |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Co-Diagnostics in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Co-Diagnostics (CODX), SEC CIK 1692415, listed on Nasdaq, classified by the SEC as surgical & medical instruments & apparatus. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-10-15.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-10-13.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-14.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-13.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-05-23.JSON and CSV
- Company record
- EDGAR filing index for CIK 1692415Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
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Datasets
Frequently Asked Questions
How much of CODX is sold short?
656,373 shares were held short at the 2026-10-15 settlement, 1.4 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is CODX's daily short volume?
On 2026-11-02, 174,159 of the 329,898 CODX shares reported to FINRA were sold short, 52.8% of the day's reported volume. Short volume is a flow for one day, not a position.
Does CODX have fails to deliver?
The SEC's latest file shows 888 CODX shares failed to deliver at settlement 2026-10-13. Fails are reported per settlement date and published twice a month with a lag.
Are CODX insiders buying or selling?
No open-market insider trades were reported for CODX in the last 90 days. The most recent filings are listed below. Latest filing: Durenard Eugene (Director) on 2026-05-23.
Who owns 5% or more of CODX?
2 holders report 5% or more of CODX in their latest filing, all on Schedule 13G (passive). The largest reported stake is Steven Boyd at 10.0% of the class (559,706 shares), filed 2026-08-14 for an event on 2026-06-30.
Which tracked 13F managers own CODX?
2 of the 30 tracked 13F managers held CODX shares at their latest filing, $138K in all. The largest: Izzy Englander's Millennium Management (32K shares, $99K), Renaissance Technologies (13K shares, $39K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.