Richard E Buller
CIK 1688319 · View on SEC EDGAR ↗
Insider
First SEC filing: June 12, 2026 · Latest: June 12, 2026
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 22 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
22 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Oct. 23, 2024 | CELC | S 10b5-1 | 350 | $16.25 | $5,688 | 6,681 Indirect | -4.98% | Disposed | 466.0% (price as of 2026-08-20) |
| Aug. 23, 2024 | CELC | S 10b5-1 | 350 | $16.95 | $5,932 | 7,031 Indirect | -4.74% | Disposed | 442.6% (price as of 2026-08-20) |
| June 21, 2024 | CELC | S 10b5-1 | 350 | $15.68 | $5,488 | 7,381 Indirect | -4.53% | Disposed | 486.5% (price as of 2026-08-20) |
| April 24, 2024 | CELC | S 10b5-1 | 350 | $17.06 | $5,971 | 7,731 Direct | -4.33% | Disposed | 439.1% (price as of 2026-08-20) |
| Feb. 21, 2024 | CELC | S 10b5-1 | 350 | $14.15 | $4,952 | 8,081 Direct | -4.15% | Disposed | 550.0% (price as of 2026-08-20) |
| Dec. 20, 2023 | CELC | S 10b5-1 | 350 | $14.37 | $5,030 | 8,431 Direct | -3.99% | Disposed | 540.0% (price as of 2026-08-20) |
| Oct. 25, 2023 | CELC | S 10b5-1 | 350 | $10.23 | $3,580 | 8,781 Direct | -3.83% | Disposed | 799.0% (price as of 2026-08-20) |
| Aug. 30, 2023 | CELC | S 10b5-1 | 350 | $9.28 | $3,248 | 9,131 Direct | -3.69% | Disposed | 891.1% (price as of 2026-08-20) |
| Aug. 23, 2023 | CELC | S 10b5-1 | 300 | $9.82 | $2,946 | 9,481 Direct | -3.07% | Disposed | 836.6% (price as of 2026-08-20) |
| June 23, 2023 | CELC | S 10b5-1 | 300 | $11.79 | $3,537 | 9,781 Direct | -2.98% | Disposed | 680.1% (price as of 2026-08-20) |
| May 23, 2023 | CELC | S | 75 | $11.10 | $832 | 10,081 Direct | -0.74% | Disposed | 728.6% (price as of 2026-08-20) |
| May 22, 2023 | CELC | S | 100 | $10.50 | $1,050 | 10,156 Direct | -0.98% | Disposed | 775.9% (price as of 2026-08-20) |
| May 19, 2023 | CELC | S | 250 | $9.85 | $2,462 | 10,256 Direct | -2.38% | Disposed | 833.7% (price as of 2026-08-20) |
| April 21, 2023 | CELC | S 10b5-1 | 300 | $9.70 | $2,910 | 8,548 Direct | -3.39% | Disposed | 848.1% (price as of 2026-08-20) |
| Feb. 21, 2023 | CELC | S 10b5-1 | 300 | $11.40 | $3,420 | 8,848 Direct | -3.28% | Disposed | 706.8% (price as of 2026-08-20) |
| Dec. 19, 2022 | CELC | S 10b5-1 | 300 | $11.11 | $3,333 | 9,148 Direct | -3.18% | Disposed | 727.8% (price as of 2026-08-20) |
| Oct. 20, 2022 | CELC | S 10b5-1 | 300 | $9.97 | $2,991 | 9,448 Direct | -3.08% | Disposed | 822.5% (price as of 2026-08-20) |
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 |
|---|---|---|---|---|---|---|---|
| June 10, 2026 | CELC | Stock Option (right to buy) | Common Stock (12,503) | $10.69 | May 19, 2035 | 12,503 | Acquired |
| June 10, 2026 | CELC | Stock Option (right to buy) | Common Stock (12,503) | $10.69 | May 19, 2035 | 12,503 | Disposed |
| June 4, 2024 | CELC | Stock Option (right to buy) | Common Stock (6,522) | $14.83 | June 4, 2034 | 6,522 | Acquired |
| April 8, 2024 | CELC | Stock Option (right to buy) | Common Stock (19,558) | $5.50 | May 17, 2032 | 19,558 | Acquired |
| April 8, 2024 | CELC | Stock Option (right to buy) | Common Stock (19,558) | $5.50 | May 17, 2032 | 19,558 | Disposed |
| April 8, 2024 | CELC | Stock Option (right to buy) | Common Stock (2,310) | $5.50 | May 12, 2031 | 2,310 | Acquired |
| April 8, 2024 | CELC | Stock Option (right to buy) | Common Stock (2,310) | $5.50 | May 12, 2031 | 2,310 | Disposed |
| April 8, 2024 | CELC | Stock Option (right to buy) | Common Stock (12,654) | $5.10 | May 14, 2030 | 12,654 | Acquired |
| April 8, 2024 | CELC | Stock Option (right to buy) | Common Stock (12,654) | $5.10 | May 14, 2030 | 12,654 | Disposed |
| April 8, 2024 | CELC | Stock Option (right to buy) | Common Stock (4,555) | $5.50 | Dec. 3, 2029 | 4,555 | Acquired |
| April 8, 2024 | CELC | Stock Option (right to buy) | Common Stock (4,555) | $5.50 | Dec. 3, 2029 | 4,555 | Disposed |
| May 15, 2023 | CELC | Stock Option (right to buy) | Common Stock (8,733) | $9.58 | May 15, 2033 | 8,733 | Acquired |
| May 12, 2021 | CELC | Stock Option (right to buy) | Common Stock (2,310) | $26.99 | May 12, 2031 | 2,310 | Acquired |
| May 14, 2020 | CELC | Stock Option (right to buy) | Common Stock (12,654) | $5.10 | May 14, 2030 | 12,654 | Acquired |
| Dec. 3, 2019 | CELC | Stock Option (right to buy) | Common Stock (4,555) | $10.68 | Dec. 3, 2029 | 4,555 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).