Buller Richard E
Director · CELC
As of 2026-09-16, Buller Richard E has 35 Form 4 transactions on record across 1 company — 29 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
- Direct $0
- Indirect $1.0M
| CELC | indirect | 12,503 sh | $1.0M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-05-04 | CELC | Sale | 2,825 @ $142.04 | $401K | −28.4% of holding | 7,125 | Form 4 |
| 2026-05-04 | CELC | Sale | 2,301 @ $141.03 | $325K | −18.8% of holding | 9,950 | Form 4 |
| 2026-05-04 | CELC | Sale | 1,670 @ $139.58 | $233K | −12.0% of holding | 12,251 | Form 4 |
| 2026-05-04 | CELC | Sale | 1,289 @ $137.00 | $177K | −8.2% of holding | 14,471 | Form 4 |
| 2026-05-04 | CELC | Sale | 550 @ $139.00 | $76K | −3.8% of holding | 13,921 | Form 4 |
| 2026-05-04 | CELC | Sale | 365 @ $143.24 | $52K | −5.1% of holding | 6,760 | Form 4 |
| 2026-03-31 | CELC | Sale | 2,325 @ $110.11 | $256K | −23.8% of holding | 7,435 | Form 4 |
| 2026-03-31 | CELC | Sale | 675 @ $110.83 | $75K | −9.1% of holding | 6,760 | Form 4 |
| 2025-12-05 | CELC | Sale | 1,510 @ $106.04 | $160K | −18.3% of holding | 6,760 | Form 4 |
| 2025-12-05 | CELC | Sale | 1,490 @ $105.34 | $157K | −15.3% of holding | 8,270 | Form 4 |
| 2025-12-01 | CELC | Sale | 1,100 @ $98.13 | $108K | −13.2% of holding | 7,260 | Form 4 |
| 2025-11-20 | CELC | Sale | 3,900 @ $96.73 | $377K | −34.9% of holding | 7,260 | Form 4 |
23 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-06-10 | CELC | Gift | 12,503 | 0 | Form 4 |
| 2026-06-10 | CELC | Gift | 12,503 | 12,503 | Form 4 |
| 2026-06-05 | CELC | Award / grant | 1,530 | 1,530 | Form 4 |
| 2026-05-19 | CELC | Gift | 1,029 | 7,789 | Form 4 |
| 2026-05-19 | CELC | Gift | 1,029 | 0 | Form 4 |
| 2026-05-04 | CELC | Option exercise | 9,000 | 15,760 | Form 4 |
| 2026-05-04 | CELC | Option exercise | 9,000 | 654 | Form 4 |
| 2026-03-31 | CELC | Option exercise | 3,000 | 9,760 | Form 4 |
| 2026-03-31 | CELC | Option exercise | 3,000 | 9,654 | Form 4 |
| 2025-12-05 | CELC | Option exercise | 3,000 | 9,760 | Form 4 |
| 2025-12-05 | CELC | Option exercise | 3,000 | 1,555 | Form 4 |
| 2025-12-02 | CELC | Gift | 500 | 6,760 | Form 4 |
| 2025-12-01 | CELC | Option exercise | 1,100 | 8,360 | Form 4 |
| 2025-12-01 | CELC | Option exercise | 1,100 | 1,522 | Form 4 |
| 2025-11-20 | CELC | Option exercise | 3,900 | 11,160 | Form 4 |
| 2025-11-20 | CELC | Option exercise | 3,900 | 2,622 | Form 4 |
| 2025-11-19 | CELC | Gift | 500 | 7,260 | Form 4 |
| 2025-05-28 | CELC | Gift | 6,522 | 6,522 | Form 4 |
| 2025-05-28 | CELC | Gift | 6,522 | 0 | Form 4 |
| 2025-05-27 | CELC | Gift | 1,079 | 7,760 | Form 4 |
| 2025-05-27 | CELC | Gift | 1,079 | 1,029 | Form 4 |
| 2025-05-19 | CELC | Award / grant | 12,503 | 12,503 | Form 4 |
| 2025-05-19 | CELC | Award / grant | 1,029 | 2,108 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.