Buller Richard E 4

4 · Celcuity Inc. · Filed Apr 2, 2026

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Updated Apr 2, 2026

Celcuity (CELC) Director Richard Buller Exercises Options, Sells Shares

What Happened

Richard E. Buller, a director of Celcuity, exercised 3,000 option-derived shares on March 31, 2026 (exercise price $5.10), acquiring those shares for $15,300. On the same day he sold a total of 3,000 shares in two open-market transactions for combined gross proceeds of $330,804 (2,325 shares at a weighted avg $110.11 and 675 shares at a weighted avg $110.83). The filing also reports a derivative conversion/disposition of 3,000 shares at $0.00 (M code).

Key Details

Transaction date: March 31, 2026; Form 4 filed April 2, 2026.
Exercise (Acquired): 3,000 shares at $5.10 = $15,300.
Sales (Disposed): 2,325 shares at weighted avg $110.11 (range $109.505–$110.48) = $255,996; 675 shares at weighted avg $110.83 (range $110.50–$111.36) = $74,808. Total sales proceeds = $330,804.
Derivative entry: 3,000 shares reported disposed at $0.00 (M = exercise/conversion); filing notes 100% vested (F5).
Plan/notes: Sales and option exercise were made pursuant to a Rule 10b5-1 trading plan adopted Dec 8, 2025 (F1). Reporting person and spouse act as trustees/beneficiaries of a trust holding securities; he continues to beneficially own those trust-held securities (F2).
Shares owned after transaction: Not specified in the provided excerpt of the filing.
Timeliness: Form filed April 2, 2026 (appears within the standard two-business-day filing window for Form 4).

Context

This filing shows an option exercise followed by immediate open-market sales (reported under a pre-established 10b5-1 plan). Exercise cost reported ($15,300) is small relative to the sale proceeds ($330,804). The 10b5-1 designation indicates the sales were pre-planned and routine; it does not, by itself, indicate insider sentiment.

Form 4

Period: 2026-03-31

Director

Transactions

Exercise/Conversion
Common Stock
[F1][F2]
2026-03-31$5.10/sh+3,000$15,300→ 9,760 total(indirect: By Trust)
Sale
Common Stock
[F1][F3][F2]
2026-03-31$110.11/sh−2,325$255,996→ 7,435 total(indirect: By Trust)
Sale
Common Stock
[F1][F4][F2]
2026-03-31$110.83/sh−675$74,808→ 6,760 total(indirect: By Trust)
Exercise/Conversion
Stock Option (right to buy)
[F1][F5][F2]
2026-03-31−3,000→ 9,654 total(indirect: By Trust)
Exercise: $5.10Exp: 2030-05-14→ Common Stock (3,000 underlying)

Holdings

Footnotes (5)

[F1]The sales and option exercise reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 8, 2025.
[F2]The Reporting Person and his spouse are the trustees and beneficiaries. The Reporting Person continues to beneficially own these securities held by the trust.
[F3]The price reported in Column 4 is a weighted average price. These shares of common stock of the issuer were traded in multiple transactions at prices ranging from $109.505 to $110.48, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares traded at each separate price within the range set forth in this footnote.
[F4]The price reported in Column 4 is a weighted average price. These shares of common stock of the issuer were traded in multiple transactions at prices ranging from $110.50 to $111.36, inclusive. The Reporting Person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares traded at each separate price within the range set forth in this footnote.
[F5]100% vested.

Signature

/s/ Griffin D. Foster as Attorney-in-Fact for Richard E. Buller pursuant to Power of Attorney previously filed|2026-04-02

1 file