Richard J Benjamin
Insider
First SEC filing: Aug. 7, 2024 · Latest: Aug. 7, 2024
Insider at
Insider transactions
0 buys (P)
7 sells (S)
Net: $-670,594
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 |
|---|---|---|---|---|---|---|---|---|---|
| March 12, 2026 | CERS | S 10b5-1 | 101,740 | $1.66 | $168,888 | 777,361 Direct | -11.57% | Disposed | 37.3% (price as of 2026-10-02) |
| March 9, 2026 | CERS | S 10b5-1 | 40,426 | $1.88 | $76,001 | 879,101 Direct | -4.40% | Disposed | 21.3% (price as of 2026-10-02) |
| March 9, 2026 | CERS | S 10b5-1 | 40,426 | $1.88 | $76,001 | 879,101 Direct | -4.40% | Disposed | 21.3% (price as of 2026-10-02) |
| March 6, 2026 | CERS | S 10b5-1 | 24,235 | $2.01 | $48,712 | 919,527 Direct | -2.57% | Disposed | 13.4% (price as of 2026-10-02) |
| March 6, 2026 | CERS | S 10b5-1 | 24,235 | $2.01 | $48,712 | 919,527 Direct | -2.57% | Disposed | 13.4% (price as of 2026-10-02) |
| March 5, 2026 | CERS | A | 55,220 | · | · | 1,004,995 Direct | +5.81% | Acquired | (price as of 2026-10-02) |
| March 5, 2026 | CERS | S 10b5-1 | 61,233 | $2.06 | $126,140 | 943,762 Direct | -6.09% | Disposed | 10.7% (price as of 2026-10-02) |
| March 5, 2026 | CERS | A | 55,220 | · | · | 1,004,995 Direct | +5.81% | Acquired | (price as of 2026-10-02) |
| March 5, 2026 | CERS | S 10b5-1 | 61,233 | $2.06 | $126,140 | 943,762 Direct | -6.09% | Disposed | 10.7% (price as of 2026-10-02) |
| March 2, 2026 | CERS | A | 264,000 | · | · | 949,775 Direct | +38.50% | Acquired | (price as of 2026-10-02) |
| March 14, 2025 | CERS | S 10b5-1 | 30,075 | $1.45 | $43,609 | 685,775 Direct | -4.20% | Disposed | 57.2% (price as of 2026-10-02) |
| March 13, 2025 | CERS | S 10b5-1 | 18,949 | $1.45 | $27,476 | 715,850 Direct | -2.58% | Disposed | 57.2% (price as of 2026-10-02) |
| March 7, 2025 | CERS | S 10b5-1 | 26,139 | $1.50 | $39,208 | 734,799 Direct | -3.44% | Disposed | 52.0% (price as of 2026-10-02) |
| March 6, 2025 | CERS | A | 66,565 | · | · | 760,938 Direct | +9.59% | Acquired | (price as of 2026-10-02) |
| March 6, 2025 | CERS | A | 300,000 | · | · | 694,373 Direct | +76.07% | Acquired | (price as of 2026-10-02) |
| March 4, 2025 | CERS | S 10b5-1 | 6,292 | $1.55 | $9,753 | 394,373 Direct | -1.57% | Disposed | 47.1% (price as of 2026-10-02) |
| March 3, 2025 | CERS | M | 13,912 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 3, 2025 | CERS | S 10b5-1 | 51,254 | $1.58 | $80,981 | 400,665 Direct | -11.34% | Disposed | 44.3% (price as of 2026-10-02) |
| March 3, 2025 | CERS | M | 13,912 | · | · | 451,919 Direct | +3.18% | Acquired | (price as of 2026-10-02) |
| Feb. 26, 2025 | CERS | A | 13,912 | · | · | 13,912 Direct | · | Acquired | (price as of 2026-10-02) |
| Aug. 2, 2024 | CERS | S 10b5-1 | 21,605 | $2.50 | $54,012 | 438,007 Direct | -4.70% | Disposed | -8.8% (price as of 2026-10-02) |
| March 14, 2024 | CERS | S 10b5-1 | 17,738 | $1.97 | $34,944 | 459,612 Direct | -3.72% | Disposed | 15.7% (price as of 2026-10-02) |
| March 13, 2024 | CERS | S 10b5-1 | 17,377 | $2.06 | $35,797 | 477,350 Direct | -3.51% | Disposed | 10.7% (price as of 2026-10-02) |
| March 12, 2024 | CERS | M | 16,666 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2024 | CERS | M | 16,666 | · | · | 494,727 Direct | +3.49% | Acquired | (price as of 2026-10-02) |
| March 8, 2024 | CERS | S 10b5-1 | 29,378 | $2.40 | $70,507 | 478,061 Direct | -5.79% | Disposed | -5.0% (price as of 2026-10-02) |
| March 1, 2024 | CERS | A | 160,000 | · | · | 507,439 Direct | +46.05% | Acquired | (price as of 2026-10-02) |
| March 13, 2023 | CERS | S 10b5-1 | 10,000 | $2.78 | $27,800 | 347,439 Direct | -2.80% | Disposed | -18.0% (price as of 2026-10-02) |
| March 13, 2023 | CERS | S 10b5-1 | 5,747 | $2.80 | $16,092 | 357,439 Direct | -1.58% | Disposed | -18.6% (price as of 2026-10-02) |
| March 13, 2023 | CERS | S 10b5-1 | 9,606 | $2.80 | $26,897 | 346,519 Direct | -2.70% | Disposed | -18.6% (price as of 2026-10-02) |
| March 12, 2023 | CERS | M | 16,667 | · | · | 16,666 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2023 | CERS | M | 23,460 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2023 | CERS | M | 16,667 | · | · | 363,186 Direct | +4.81% | Acquired | (price as of 2026-10-02) |
| March 12, 2023 | CERS | M | 23,460 | · | · | 356,125 Direct | +7.05% | Acquired | (price as of 2026-10-02) |
| March 1, 2023 | CERS | A | 160,000 | · | · | 332,665 Direct | +92.66% | Acquired | (price as of 2026-10-02) |
| Aug. 9, 2022 | CERS | S 10b5-1 | 10,000 | $5.12 | $51,200 | 172,665 Direct | -5.47% | Disposed | -55.5% (price as of 2026-10-02) |
| March 14, 2022 | CERS | S 10b5-1 | 5,982 | $5.04 | $30,149 | 182,665 Direct | -3.17% | Disposed | -54.8% (price as of 2026-10-02) |
| March 14, 2022 | CERS | S 10b5-1 | 8,173 | $5.04 | $41,192 | 171,980 Direct | -4.54% | Disposed | -54.8% (price as of 2026-10-02) |
| March 14, 2022 | CERS | S 10b5-1 | 16,152 | $5.04 | $81,406 | 157,383 Direct | -9.31% | Disposed | -54.8% (price as of 2026-10-02) |
| March 12, 2022 | CERS | M | 16,667 | · | · | 33,333 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| March 12, 2022 | CERS | M | 22,770 | · | · | 23,460 Direct | -49.25% | Disposed | (price as of 2026-10-02) |
| March 12, 2022 | CERS | M | 45,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2022 | CERS | M | 16,667 | · | · | 188,647 Direct | +9.69% | Acquired | (price as of 2026-10-02) |
| March 12, 2022 | CERS | M | 22,770 | · | · | 180,153 Direct | +14.47% | Acquired | (price as of 2026-10-02) |
| March 12, 2022 | CERS | M | 45,000 | · | · | 173,535 Direct | +35.01% | Acquired | (price as of 2026-10-02) |
| March 1, 2022 | CERS | A | 105,000 | · | · | 105,000 Direct | · | Acquired | (price as of 2026-10-02) |
| March 1, 2022 | CERS | A | 52,500 | · | · | 128,535 Direct | +69.05% | Acquired | (price as of 2026-10-02) |
| Nov. 3, 2021 | CERS | M | 31,667 | · | · | 31,667 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Nov. 3, 2021 | CERS | M | 33,333 | · | · | 8,334 Direct | -80.00% | Disposed | (price as of 2026-10-02) |
| Nov. 3, 2021 | CERS | M | 100,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Nov. 3, 2021 | CERS | S 10b5-1 | 31,667 | $7.35 | $232,752 | 76,035 Direct | -29.40% | Disposed | -69.0% (price as of 2026-10-02) |
| Nov. 3, 2021 | CERS | M | 31,667 | $4.32 | $136,801 | 107,702 Direct | +41.65% | Acquired | -47.2% (price as of 2026-10-02) |
| Nov. 3, 2021 | CERS | S 10b5-1 | 33,333 | $7.35 | $244,998 | 76,035 Direct | -30.48% | Disposed | -69.0% (price as of 2026-10-02) |
| Nov. 3, 2021 | CERS | M | 33,333 | $4.33 | $144,332 | 109,368 Direct | +43.84% | Acquired | -47.3% (price as of 2026-10-02) |
| Nov. 3, 2021 | CERS | S 10b5-1 | 100,000 | $7.90 | $790,000 | 76,035 Direct | -56.81% | Disposed | -71.1% (price as of 2026-10-02) |
| Nov. 3, 2021 | CERS | M | 100,000 | $4.72 | $472,000 | 176,035 Direct | +131.52% | Acquired | -51.7% (price as of 2026-10-02) |
| March 15, 2021 | CERS | S 10b5-1 | 20,000 | $6.34 | $126,800 | 76,035 Direct | -20.83% | Disposed | -64.0% (price as of 2026-10-02) |
| March 15, 2021 | CERS | S 10b5-1 | 7,989 | $6.38 | $50,970 | 96,035 Direct | -7.68% | Disposed | -64.3% (price as of 2026-10-02) |
| March 15, 2021 | CERS | S 10b5-1 | 15,786 | $6.38 | $100,715 | 81,254 Direct | -16.27% | Disposed | -64.3% (price as of 2026-10-02) |
| March 15, 2021 | CERS | S 10b5-1 | 5,556 | $6.38 | $35,447 | 52,040 Direct | -9.65% | Disposed | -64.3% (price as of 2026-10-02) |
| March 12, 2021 | CERS | M | 22,770 | · | · | 46,230 Direct | -33.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2021 | CERS | M | 45,000 | · | · | 45,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2021 | CERS | M | 15,833 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2021 | CERS | M | 22,770 | · | · | 104,024 Direct | +28.02% | Acquired | (price as of 2026-10-02) |
| March 12, 2021 | CERS | M | 45,000 | · | · | 97,040 Direct | +86.47% | Acquired | (price as of 2026-10-02) |
| March 12, 2021 | CERS | M | 15,833 | · | · | 57,596 Direct | +37.91% | Acquired | (price as of 2026-10-02) |
| March 1, 2021 | CERS | A | 50,000 | · | · | 50,000 Direct | · | Acquired | (price as of 2026-10-02) |
| March 1, 2021 | CERS | A | 100,000 | · | · | 100,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Aug. 24, 2020 | CERS | M | 100,000 | · | · | 100,000 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| Aug. 24, 2020 | CERS | S 10b5-1 | 100,000 | $7.90 | $790,000 | 41,763 Direct | -70.54% | Disposed | -71.1% (price as of 2026-10-02) |
| Aug. 24, 2020 | CERS | M | 100,000 | $4.72 | $472,000 | 141,763 Direct | +239.45% | Acquired | -51.7% (price as of 2026-10-02) |
| July 7, 2020 | CERS | M | 31,666 | · | · | 23,750 Direct | -57.14% | Disposed | (price as of 2026-10-02) |
| July 7, 2020 | CERS | M | 22,917 | · | · | 25,000 Direct | -47.83% | Disposed | (price as of 2026-10-02) |
| July 7, 2020 | CERS | M | 100,000 | · | · | 200,000 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| July 7, 2020 | CERS | S 10b5-1 | 31,666 | $7.20 | $227,995 | 41,763 Direct | -43.12% | Disposed | -68.3% (price as of 2026-10-02) |
| July 7, 2020 | CERS | M | 31,666 | $4.32 | $136,797 | 73,429 Direct | +75.82% | Acquired | -47.2% (price as of 2026-10-02) |
| July 7, 2020 | CERS | S 10b5-1 | 22,917 | $7.20 | $165,002 | 41,763 Direct | -35.43% | Disposed | -68.3% (price as of 2026-10-02) |
| July 7, 2020 | CERS | M | 22,917 | $4.33 | $99,231 | 64,680 Direct | +54.87% | Acquired | -47.3% (price as of 2026-10-02) |
| July 7, 2020 | CERS | S 10b5-1 | 100,000 | $7.20 | $720,000 | 41,763 Direct | -70.54% | Disposed | -68.3% (price as of 2026-10-02) |
| July 7, 2020 | CERS | M | 100,000 | $4.72 | $472,000 | 141,763 Direct | +239.45% | Acquired | -51.7% (price as of 2026-10-02) |
| March 17, 2020 | CERS | S 10b5-1 | 17,497 | $3.59 | $62,814 | 41,763 Direct | -29.53% | Disposed | -36.5% (price as of 2026-10-02) |
| March 17, 2020 | CERS | M | 45,000 | · | · | 59,260 Direct | +315.57% | Acquired | (price as of 2026-10-02) |
| March 17, 2020 | CERS | S 10b5-1 | 6,051 | $3.59 | $21,723 | 14,260 Direct | -29.79% | Disposed | -36.5% (price as of 2026-10-02) |
| March 17, 2020 | CERS | M | 15,833 | · | · | 20,311 Direct | +353.57% | Acquired | (price as of 2026-10-02) |
| March 17, 2020 | CERS | S 10b5-1 | 3,022 | $3.59 | $10,849 | 4,478 Direct | -40.29% | Disposed | -36.5% (price as of 2026-10-02) |
| March 17, 2020 | CERS | M | 7,500 | · | · | 7,500 Direct | · | Acquired | (price as of 2026-10-02) |
| March 12, 2020 | CERS | M | 45,000 | · | · | 90,000 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| March 12, 2020 | CERS | M | 15,833 | · | · | 15,833 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2020 | CERS | M | 7,500 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| March 2, 2020 | CERS | A | 69,000 | · | · | 69,000 Direct | · | Acquired | (price as of 2026-10-02) |
| March 2, 2020 | CERS | A | 138,000 | · | · | 138,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Aug. 7, 2019 | CERS | S | 16,444 | $5.01 | $82,384 | 0 Direct | -100.00% | Disposed | -54.5% (price as of 2026-10-02) |
| June 6, 2019 | CERS | A | 135,000 | · | · | 135,000 Direct | · | Acquired | (price as of 2026-10-02) |
| March 13, 2019 | CERS | S | 5,979 | $5.90 | $35,276 | 16,444 Direct | -26.66% | Disposed | -61.4% (price as of 2026-10-02) |
| March 13, 2019 | CERS | S | 2,832 | $5.90 | $16,709 | 6,589 Direct | -30.06% | Disposed | -61.4% (price as of 2026-10-02) |
| March 12, 2019 | CERS | M | 15,834 | · | · | 31,666 Direct | -33.33% | Disposed | (price as of 2026-10-02) |
| March 12, 2019 | CERS | M | 7,500 | · | · | 7,500 Direct | -50.00% | Disposed | (price as of 2026-10-02) |
| March 12, 2019 | CERS | M | 15,834 | · | · | 22,423 Direct | +240.31% | Acquired | (price as of 2026-10-02) |
| March 12, 2019 | CERS | M | 7,500 | · | · | 9,421 Direct | +390.42% | Acquired | (price as of 2026-10-02) |
| March 10, 2019 | CERS | M | 3,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
Showing latest 100 of 125 transactions
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 |
|---|---|---|---|---|---|---|---|
| March 3, 2025 | CERS | Restricted Stock Unit | Common Stock | · | · | 13,912 | Disposed |
| Feb. 26, 2025 | CERS | Restricted Stock Unit | Common Stock | · | · | 13,912 | Acquired |
| March 12, 2024 | CERS | Restricted Stock Unit | Common Stock | · | · | 16,666 | Disposed |
| March 12, 2023 | CERS | Restricted Stock Unit | Common Stock | · | · | 16,667 | Disposed |
| March 12, 2023 | CERS | Restricted Stock Unit | Common Stock | · | · | 23,460 | Disposed |
| March 12, 2022 | CERS | Restricted Stock Unit | Common Stock | · | · | 16,667 | Disposed |
| March 12, 2022 | CERS | Restricted Stock Unit | Common Stock | · | · | 22,770 | Disposed |
| March 12, 2022 | CERS | Restricted Stock Unit | Common Stock | · | · | 45,000 | Disposed |
| March 1, 2022 | CERS | Option (Right to Buy) | Common Stock | $5.76 | Feb. 28, 2032 | 105,000 | Acquired |
| Nov. 3, 2021 | CERS | Option (Right to Buy) | Common Stock | $4.32 | Feb. 28, 2028 | 31,667 | Disposed |
| Nov. 3, 2021 | CERS | Option (Right to Buy) | Common Stock | $4.33 | Feb. 28, 2027 | 33,333 | Disposed |
| Nov. 3, 2021 | CERS | Option (Right to Buy) | Common Stock | $4.72 | Aug. 31, 2025 | 100,000 | Disposed |
| March 12, 2021 | CERS | Restricted Stock Unit | Common Stock | · | · | 22,770 | Disposed |
| March 12, 2021 | CERS | Restricted Stock Unit | Common Stock | · | · | 45,000 | Disposed |
| March 12, 2021 | CERS | Restricted Stock Unit | Common Stock | · | · | 15,833 | Disposed |
| March 1, 2021 | CERS | Restricted Stock Unit | Common Stock | · | · | 50,000 | Acquired |
| March 1, 2021 | CERS | Option (Right to Buy) | Common Stock | $6.52 | Feb. 28, 2031 | 100,000 | Acquired |
| Aug. 24, 2020 | CERS | Option (Right to Buy) | Common Stock | $4.72 | Aug. 31, 2025 | 100,000 | Disposed |
| July 7, 2020 | CERS | Option (Right to Buy) | Common Stock | $4.32 | Feb. 28, 2028 | 31,666 | Disposed |
| July 7, 2020 | CERS | Option (Right to Buy) | Common Stock | $4.33 | Feb. 28, 2027 | 22,917 | Disposed |
| July 7, 2020 | CERS | Option (Right to Buy) | Common Stock | $4.72 | Aug. 31, 2025 | 100,000 | Disposed |
| March 12, 2020 | CERS | Restricted Stock Unit | Common Stock | · | · | 45,000 | Disposed |
| March 12, 2020 | CERS | Restricted Stock Unit | Common Stock | · | · | 15,833 | Disposed |
| March 12, 2020 | CERS | Restricted Stock Unit | Common Stock | · | · | 7,500 | Disposed |
| March 2, 2020 | CERS | Restricted Stock Unit | Common Stock | · | · | 69,000 | Acquired |
| March 2, 2020 | CERS | Option (Right to Buy) | Common Stock | $5.11 | March 1, 2030 | 138,000 | Acquired |
| June 6, 2019 | CERS | Restricted Stock Unit | Common Stock | · | · | 135,000 | Acquired |
| March 12, 2019 | CERS | Restricted Stock Unit | Common Stock | · | · | 15,834 | Disposed |
| March 12, 2019 | CERS | Restricted Stock Unit | Common Stock | · | · | 7,500 | Disposed |
| March 10, 2019 | CERS | Restricted Stock Unit | Common Stock | · | · | 3,000 | Disposed |
| Aug. 28, 2018 | CERS | Option (Right to Buy) | Common Stock | $4.72 | Aug. 31, 2025 | 50,000 | Disposed |
| Aug. 14, 2018 | CERS | Option (Right to BUy) | Common Stock | $4.33 | Feb. 27, 2027 | 35,416 | Disposed |
| March 12, 2018 | CERS | Restricted Stock Unit | Common Stock | · | · | 7,500 | Disposed |
| March 10, 2018 | CERS | Restricted Stock Unit | Common Stock | · | · | 3,000 | Disposed |
| March 1, 2018 | CERS | Restricted Stock Unit | Common Stock | · | · | 47,500 | Acquired |
| March 1, 2018 | CERS | Option (Right to Buy) | Common Stock | $4.32 | Feb. 28, 2028 | 95,000 | Acquired |
| March 10, 2017 | CERS | Restricted Stock Unit | Common Stock | · | · | 3,000 | Disposed |
| March 1, 2017 | CERS | Restricted Stock Unit | Common Stock | · | · | 22,500 | Acquired |
| March 1, 2017 | CERS | Option (Right to Buy) | Common Stock | $4.33 | Feb. 28, 2027 | 100,000 | Acquired |
| March 1, 2016 | CERS | Option (Right to Buy) | Common Stock | $5.06 | Feb. 28, 2026 | 45,000 | Acquired |
| March 1, 2016 | CERS | Restricted Stock Unit | Common Stock | · | · | 9,000 | Acquired |
| Sept. 1, 2015 | CERS | Option (Right to Buy) | Common Stock | $4.72 | Aug. 31, 2025 | 350,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2025 | $508,690 | · | $713,844 | · | $276,911 | · | $7,108 | $1,506,553 |
| 2024 | $493,077 | $44,377 | $588,600 | · | · | · | $3,564 | $1,129,618 |
| 2023 | $489,126 | · | $738,600 | · | $110,942 | · | $3,614 | $1,342,282 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.