Richard E. Buller sold Celcuity Inc. ($CELC) shares on the open market four times in the last year, totaling about $802 thousand. His most recent sale occurred on December 5, 2025. These sales rank 5,412th among nearly 12,000 individual insiders, well below the average of $8.6 million per seller and 6.4 transactions. Buller made no open market purchases during this period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 31, 2026 | Celcuity Inc. | $CELC | Buller Richard E | Not found | M | Stock Option (right to buy) | 3000 | $0.00 | 9,654.0000 | 47,589,731 | 23.71% | 0.01% |
| March 31, 2026 | Celcuity Inc. | $CELC | Buller Richard E | Not found | M | Common Stock | 3000 | $5.10 | 10,789.0000 | 47,589,731 | 38.52% | 0.01% |
| March 31, 2026 | Celcuity Inc. | $CELC | Buller Richard E | Not found | S | Common Stock | 2325 | $110.11 | 8,464.0000 | 47,589,731 | 21.55% | 0.00% |
| March 31, 2026 | Celcuity Inc. | $CELC | Buller Richard E | Not found | S | Common Stock | 675 | $110.83 | 7,789.0000 | 47,589,731 | 7.97% | 0.00% |
| Dec. 5, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | M | Stock Option (right to buy) | 3000 | $0.00 | 1,555.0000 | 47,589,731 | 65.86% | 0.01% |
| Dec. 5, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | M | Common Stock | 3000 | $5.50 | 10,789.0000 | 47,589,731 | 38.52% | 0.01% |
| Dec. 5, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | S | Common Stock | 1490 | $105.34 | 9,299.0000 | 47,589,731 | 13.81% | 0.00% |
| Dec. 5, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | S | Common Stock | 1510 | $106.04 | 7,789.0000 | 47,589,731 | 16.24% | 0.00% |
| Dec. 2, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | G | Common Stock | 500 | $0.00 | 7,789.0000 | 47,589,731 | 6.03% | 0.00% |
| Dec. 1, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | S | Common Stock | 1100 | $98.13 | 8,289.0000 | 47,589,731 | 11.72% | 0.00% |
| Dec. 1, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | M | Common Stock | 1100 | $14.83 | 9,389.0000 | 47,589,731 | 13.27% | 0.00% |
| Dec. 1, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | M | Stock Option (right to buy) | 1100 | $0.00 | 1,522.0000 | 47,589,731 | 41.95% | 0.00% |
| Nov. 20, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | M | Common Stock | 3900 | $14.83 | 12,189.0000 | 47,589,731 | 47.05% | 0.01% |
| Nov. 20, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | M | Stock Option (right to buy) | 3900 | $0.00 | 2,622.0000 | 47,589,731 | 59.80% | 0.01% |
| Nov. 20, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | S | Common Stock | 3900 | $96.73 | 8,289.0000 | 47,589,731 | 32.00% | 0.01% |
| Nov. 19, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | G | Common Stock | 500 | $0.00 | 8,289.0000 | 47,589,731 | 5.69% | 0.00% |
| May 28, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | G | Stock Option (right to buy) | 6522 | $0.00 | 6,522.0000 | 39,449,393 | 9999.99% | 0.02% |
| May 28, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | G | Stock Option (right to buy) | 6522 | $0.00 | 6,522.0000 | 39,449,393 | 50.00% | 0.02% |
| May 27, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | G | Common Stock | 1079 | $0.00 | 8,789.0000 | 39,449,393 | 13.99% | 0.00% |
| May 27, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | G | Common Stock | 1079 | $0.00 | 8,789.0000 | 39,449,393 | 10.93% | 0.00% |
| May 19, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | A | Stock Option (right to buy) | 12503 | $0.00 | 12,503.0000 | 39,449,393 | 9999.99% | 0.03% |
| May 19, 2025 | Celcuity Inc. | $CELC | Buller Richard E | Not found | A | Common Stock | 1029 | $0.00 | 8,789.0000 | 39,449,393 | 13.26% | 0.00% |
| Oct. 23, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 350 | $16.25 | 7,760.0000 | 42,793,047 | 4.32% | 0.00% |
| Aug. 23, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 350 | $16.95 | 8,110.0000 | 23,679,472 | 4.14% | 0.00% |
| June 21, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 350 | $15.68 | 8,460.0000 | 23,679,472 | 3.97% | 0.00% |
| June 4, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | A | Common Stock | 1079 | $0.00 | 8,810.0000 | 23,679,472 | 13.96% | 0.00% |
| June 4, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | A | Stock Option (right to buy) | 6522 | $0.00 | 54,332.0000 | 23,679,472 | 13.64% | 0.03% |
| May 22, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Common Stock | 1958 | $0.00 | 7,731.0000 | 23,679,472 | 33.92% | 0.01% |
| May 22, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Common Stock | 1958 | $0.00 | 7,731.0000 | 23,679,472 | 20.21% | 0.01% |
| April 24, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 350 | $17.06 | 7,731.0000 | 23,679,472 | 4.33% | 0.00% |
| April 8, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Stock Option (right to buy) | 2310 | $0.00 | 28,291.0000 | 23,679,472 | 7.55% | 0.01% |
| April 8, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Stock Option (right to buy) | 12654 | $0.00 | 21,387.0000 | 23,679,472 | 144.90% | 0.05% |
| April 8, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Stock Option (right to buy) | 19558 | $0.00 | 28,291.0000 | 23,679,472 | 223.96% | 0.08% |
| April 8, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Stock Option (right to buy) | 19558 | $0.00 | 28,291.0000 | 23,679,472 | 40.87% | 0.08% |
| April 8, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Stock Option (right to buy) | 2310 | $0.00 | 11,043.0000 | 23,679,472 | 26.45% | 0.01% |
| April 8, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Stock Option (right to buy) | 4555 | $0.00 | 28,291.0000 | 23,679,472 | 13.87% | 0.02% |
| April 8, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Stock Option (right to buy) | 4555 | $0.00 | 13,288.0000 | 23,679,472 | 52.16% | 0.02% |
| April 8, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | G | Stock Option (right to buy) | 12654 | $0.00 | 28,291.0000 | 23,679,472 | 30.90% | 0.05% |
| Feb. 21, 2024 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 350 | $14.15 | 8,081.0000 | 23,679,472 | 4.15% | 0.00% |
| Dec. 20, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 350 | $14.37 | 8,431.0000 | 0 | 3.99% | 0.00% |
| Oct. 25, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 350 | $10.23 | 8,781.0000 | 0 | 3.83% | 0.00% |
| Aug. 30, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 350 | $9.28 | 9,131.0000 | 0 | 3.69% | 0.00% |
| Aug. 23, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 300 | $9.82 | 9,481.0000 | 0 | 3.07% | 0.00% |
| June 23, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 300 | $11.79 | 9,781.0000 | 0 | 2.98% | 0.00% |
| May 23, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 75 | $11.10 | 10,081.0000 | 0 | 0.74% | 0.00% |
| May 19, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 250 | $9.85 | 10,256.0000 | 0 | 2.38% | 0.00% |
| May 22, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 100 | $10.50 | 10,156.0000 | 0 | 0.98% | 0.00% |
| May 15, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | A | Common Stock | 1958 | $0.00 | 10,506.0000 | 0 | 22.91% | 0.00% |
| May 15, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | A | Stock Option (right to buy) | 8733 | $0.00 | 47,810.0000 | 0 | 22.35% | 0.00% |
| April 21, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 300 | $9.70 | 8,548.0000 | 0 | 3.39% | 0.00% |
| Feb. 21, 2023 | Celcuity Inc. | $CELC | Buller Richard E | Director | S | Common Stock | 300 | $11.40 | 8,848.0000 | 0 | 3.28% | 0.00% |