Richard S Serbin
Insider
First SEC filing: Aug. 16, 2017 · Latest: Aug. 16, 2017
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 23, 2025 | CODX | A | 57,499 | · | · | 271,666 Direct | +26.85% | Acquired | (price as of 2026-10-05) |
| Nov. 23, 2025 | CODX | M | 57,499 | · | · | 170,834 Direct | -25.18% | Disposed | (price as of 2026-10-05) |
| Aug. 13, 2025 | CODX | A | 125,000 | · | · | 228,333 Direct | +120.97% | Acquired | (price as of 2026-10-05) |
| May 23, 2025 | CODX | A | 48,334 | · | · | 214,167 Direct | +29.15% | Acquired | (price as of 2026-10-05) |
| May 23, 2025 | CODX | M | 48,334 | · | · | 103,333 Direct | -31.87% | Disposed | (price as of 2026-10-05) |
| Nov. 23, 2024 | CODX | A | 48,333 | · | · | 165,833 Direct | +41.13% | Acquired | (price as of 2026-10-05) |
| Nov. 23, 2024 | CODX | M | 48,333 | · | · | 151,667 Direct | -24.17% | Disposed | (price as of 2026-10-05) |
| May 23, 2024 | CODX | A | 30,000 | · | · | 117,500 Direct | +34.29% | Acquired | (price as of 2026-10-05) |
| May 23, 2024 | CODX | M | 30,000 | · | · | 200,000 Direct | -13.04% | Disposed | (price as of 2026-10-05) |
| April 26, 2024 | CODX | A | 110,000 | · | · | 230,000 Direct | +91.67% | Acquired | (price as of 2026-10-05) |
| Nov. 23, 2023 | CODX | A | 30,000 | · | · | 87,500 Direct | +52.17% | Acquired | (price as of 2026-10-05) |
| Nov. 23, 2023 | CODX | M | 30,000 | · | · | 120,000 Direct | -20.00% | Disposed | (price as of 2026-10-05) |
| June 12, 2023 | CODX | A | 70,000 | · | · | 150,000 Direct | +87.50% | Acquired | (price as of 2026-10-05) |
| May 23, 2023 | CODX | A | 18,333 | · | · | 57,500 Direct | +46.81% | Acquired | (price as of 2026-10-05) |
| May 23, 2023 | CODX | M | 18,333 | · | · | 80,000 Direct | -18.64% | Disposed | (price as of 2026-10-05) |
| Jan. 17, 2023 | CODX | A | 40,000 | · | · | 98,333 Direct | +68.57% | Acquired | (price as of 2026-10-05) |
| Jan. 8, 2023 | CODX | A | 12,500 | · | · | 39,167 Direct | +46.87% | Acquired | (price as of 2026-10-05) |
| Jan. 8, 2023 | CODX | M | 12,500 | · | · | 58,333 Direct | -17.65% | Disposed | (price as of 2026-10-05) |
| Nov. 23, 2022 | CODX | A | 11,667 | · | · | 26,667 Direct | +77.78% | Acquired | (price as of 2026-10-05) |
| Nov. 23, 2022 | CODX | M | 11,667 | · | · | 70,833 Direct | -14.14% | Disposed | (price as of 2026-10-05) |
| July 11, 2022 | CODX | A | 70,000 | · | · | 82,500 Direct | +560.00% | Acquired | (price as of 2026-10-05) |
| Jan. 8, 2022 | CODX | A | 12,500 | · | · | 15,000 Direct | +500.00% | Acquired | (price as of 2026-10-05) |
| Jan. 8, 2022 | CODX | M | 12,500 | · | · | 12,500 Direct | -50.00% | Disposed | (price as of 2026-10-05) |
| Jan. 14, 2021 | CODX | S | 10,000 | $10.29 | $102,900 | 2,500 Direct | -80.00% | Disposed | -99.6% (price as of 2026-10-05) |
| Jan. 7, 2021 | CODX | A | 37,500 | · | · | 37,500 Direct | · | Acquired | (price as of 2026-10-05) |
| Dec. 14, 2020 | CODX | S | 17,000 | $10.10 | $171,700 | 0 Direct | -100.00% | Disposed | -99.6% (price as of 2026-10-05) |
| Nov. 23, 2020 | CODX | M | 17,000 | · | · | 17,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 23, 2020 | CODX | A | 17,000 | · | · | 17,000 Direct | · | Acquired | (price as of 2026-10-05) |
| Nov. 23, 2020 | CODX | M | 17,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| May 28, 2020 | CODX | S | 17,500 | $18.03 | $315,525 | 0 Direct | -100.00% | Disposed | -99.8% (price as of 2026-10-05) |
| May 28, 2020 | CODX | S | 7,500 | $18.00 | $135,000 | 0 Direct | -100.00% | Disposed | -99.8% (price as of 2026-10-05) |
| May 28, 2020 | CODX | M | 25,000 | $3.96 | $99,000 | 25,000 Direct | · | Acquired | -99.1% (price as of 2026-10-05) |
| May 28, 2020 | CODX | M | 25,000 | · | · | 0 Direct | · | Acquired | (price as of 2026-10-05) |
| May 19, 2020 | CODX | S | 25,000 | $18.50 | $462,500 | 0 Direct | -100.00% | Disposed | -99.8% (price as of 2026-10-05) |
| May 19, 2020 | CODX | M | 25,000 | $0.71 | $17,750 | 25,000 Direct | · | Acquired | -94.8% (price as of 2026-10-05) |
| May 19, 2020 | CODX | M | 25,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-05) |
| Feb. 10, 2020 | CODX | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-05) |
| April 24, 2019 | CODX | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-05) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Nov. 23, 2025 | CODX | Restricted Stock Unit | Common Stock | $0.00 | · | 57,499 | Disposed |
| Aug. 13, 2025 | CODX | Restricted Stock Units | Common Stock | · | · | 125,000 | Acquired |
| May 23, 2025 | CODX | Restricted Stock Unit | Common Stock | $0.00 | · | 48,334 | Disposed |
| Nov. 23, 2024 | CODX | Restricted Stock Unit | Common Stock | $0.00 | · | 48,333 | Disposed |
| May 23, 2024 | CODX | Restricted Stock Unit | Common Stock | $0.00 | · | 30,000 | Disposed |
| April 26, 2024 | CODX | Restricted Stock Units | Common Stock | · | · | 110,000 | Acquired |
| Nov. 23, 2023 | CODX | Restricted Stock Unit | Common Stock | $0.00 | · | 30,000 | Disposed |
| June 12, 2023 | CODX | Restricted Stock Units | Common Stock | · | · | 70,000 | Acquired |
| May 23, 2023 | CODX | Restricted Stock Units | Common Stock | $0.00 | · | 18,333 | Disposed |
| Jan. 17, 2023 | CODX | Restricted Stock Units | Common Stock | · | · | 40,000 | Acquired |
| Jan. 8, 2023 | CODX | Restricted Stock Units | Common Stock | $0.00 | · | 12,500 | Disposed |
| Nov. 23, 2022 | CODX | Restricted Stock Units | Common Stock | $0.00 | · | 11,667 | Disposed |
| July 11, 2022 | CODX | Restricted Stock Units | Common Stock | · | · | 70,000 | Acquired |
| Jan. 8, 2022 | CODX | Restricted Stock Units | Common Stock | $0.00 | · | 12,500 | Disposed |
| Jan. 7, 2021 | CODX | Restricted Stock Units | Common Stock | · | · | 37,500 | Acquired |
| Nov. 23, 2020 | CODX | Restricted Stock Units | Common Stock | · | · | 17,000 | Acquired |
| Nov. 23, 2020 | CODX | Restricted Stock Units | Common Stock | · | · | 17,000 | Disposed |
| May 28, 2020 | CODX | Non-Qualified Stock Option (right to buy) | Common Stock | $3.96 | Feb. 10, 2030 | 25,000 | Acquired |
| May 19, 2020 | CODX | Non-Qualified Stock Option (right to buy) | Common Stock | $0.71 | April 23, 2029 | 25,000 | Disposed |
| Feb. 10, 2020 | CODX | Non-Qualified Stock Option (right to buy) | Common Stock | $3.96 | Feb. 10, 2030 | 25,000 | Acquired |
| April 24, 2019 | CODX | Non-Qualified Stock Option (right to buy) | Common Stock | $0.71 | April 23, 2029 | 25,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Aug. 16, 2017 | CODX | Stock Options | 36,250 | Direct |