Celcuity director exercises options, sells 9,000 shares
Celcuity Inc. director Richard E Buller reported an exercise-and-sale on May 4, 2026.
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Form Type
4
Rhea-AI Filing Summary
Celcuity Inc. director Richard E Buller reported an exercise-and-sale on May 4, 2026. He exercised stock options for 9,000 shares at $5.10 per share, then a trust sold 9,000 Celcuity shares in multiple trades at weighted-average prices between $137.00 and $143.2378, pursuant to a Rule 10b5-1 plan adopted December 8, 2025. After these transactions, the trust holds 6,760 shares, and he also directly owns 1,029 shares.
Insider Trade Summary 10b5-1
Exercise and Sale: 9,000 shares ($1.22M approx. pre-tax spread)
Exercise and Sale
9 txns
Insider
Buller Richard E
Role
Director
Sold
9,000 shs ($1.26M)
Approx. gross sale proceeds
$1.26M
Approx. exercise cost
$46K
Approx. pre-tax spread
$1.22M
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (right to buy) | 9,000 | $0.00 | $0.00 |
| Exercise | Common Stock | 9,000 | $5.10 | $46K |
| Sale | Common Stock | 1,289 | $137.00 | $177K |
| Sale | Common Stock | 550 | $138.9955 | $76K |
| Sale | Common Stock | 1,670 | $139.5832 | $233K |
| Sale | Common Stock | 2,301 | $141.0271 | $325K |
| Sale | Common Stock | 2,825 | $142.0358 | $401K |
| Sale | Common Stock | 365 | $143.2378 | $52K |
| holding | Common Stock | -- | -- | -- |
Holdings After Transaction:
Stock Option (right to buy) — 654 contracts (Indirect, By Trust);
Common Stock — 6,760 shares (Indirect, By Trust);
Common Stock — 1,029 shares (Direct)
Footnotes (8)
- 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 $138.255 to $139.16, 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 $139.40 to $140.20, 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. 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 $140.50 to $141.33, 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.
- F6. 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 $141.59 to $142.50, 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.
- F7. 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 $143.20 to $143.46, 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.
- F8. 100% vested.
Key Figures
Options exercised: 9,000 shares
Exercise price: $5.10 per share
Shares sold: 9,000 shares
+4 more
7 metrics
Options exercised
9,000 shares
Stock options exercised into common stock on May 4, 2026
Exercise price
$5.10 per share
Conversion/exercise price for the 9,000-share stock option
Shares sold
9,000 shares
Total Celcuity common shares sold in multiple transactions on May 4, 2026
Sale price range
$137.00–$143.2378 per share
Weighted-average prices across the reported common stock sales
Indirect holdings post-transaction
6,760 shares
Common stock held indirectly by trust after the May 4, 2026 transactions
Direct holdings post-transaction
1,029 shares
Common stock held directly by Richard E Buller after the transactions
10b5-1 plan adoption date
December 8, 2025
Date Buller adopted the Rule 10b5-1 trading plan governing these trades
Key Terms
Rule 10b5-1 trading plan, weighted average price, beneficially own, Stock Option (right to buy)
4 terms
Rule 10b5-1 trading plan regulatory
"The sales and option exercise reported were effected pursuant to a Rule 10b5-1 trading plan adopted"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
beneficially own financial
"The Reporting Person continues to beneficially own these securities held by the trust."
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
Stock Option (right to buy) financial
"Stock Option (right to buy) was exercised into 9,000 shares of Common Stock."
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What transactions did Celcuity (CELC) director Richard E Buller report on May 4, 2026?
Richard E Buller exercised stock options for 9,000 Celcuity shares at $5.10 per share and a trust then sold 9,000 common shares in multiple trades at weighted-average prices between $137.00 and $143.2378, all on May 4, 2026.
Were Buller’s CELC trades made under a Rule 10b5-1 trading plan?
Yes. The sales and option exercise were effected under a Rule 10b5-1 trading plan that Buller adopted on December 8, 2025, and the Form 4 affirms the 10b5-1 checkbox, indicating these were pre-arranged, plan-based transactions rather than discretionary trades.
What stock option exercise did Buller report for CELC common stock?
Buller exercised a Stock Option (right to buy) for 9,000 shares of Celcuity common stock at an exercise price of $5.10 per share. The option was noted as 100% vested and carried an expiration date of May 14, 2030.
AI-generated analysis. How Rhea-AI works. Not financial advice.
