Celcuity director sells 3,000 shares in plan trade
Celcuity Inc. director Richard E. Buller reported an option exercise and related stock sales by a family trust.
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Form Type
4
Rhea-AI Filing Summary
Celcuity Inc. director Richard E. Buller reported an option exercise and related stock sales by a family trust. On March 31, 2026, a trust for which he and his spouse are trustees exercised 3,000 stock options at $5.10 per share into common stock.
The trust then sold 2,325 Celcuity common shares at a weighted average price of $110.1057 and 675 shares at a weighted average price of $110.8268 in open-market transactions, totaling 3,000 shares sold. These trades and the option exercise were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on December 8, 2025. After the transactions, the trust held 6,760 shares of common stock, and Buller also held 1,029 shares directly.
Insider Trade Summary 10b5-1
Exercise and Sale: 3,000 shares ($316K approx. pre-tax spread)
Exercise and Sale
5 txns
Insider
Buller Richard E
Role
Director
Sold
3,000 shs ($331K)
Approx. gross sale proceeds
$331K
Approx. exercise cost
$15K
Approx. pre-tax spread
$316K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (right to buy) | 3,000 | $0.00 | $0.00 |
| Exercise | Common Stock | 3,000 | $5.10 | $15K |
| Sale | Common Stock | 2,325 | $110.1057 | $256K |
| Sale | Common Stock | 675 | $110.8268 | $75K |
| holding | Common Stock | -- | -- | -- |
Holdings After Transaction:
Stock Option (right to buy) — 9,654 contracts (Indirect, By Trust);
Common Stock — 6,760 shares (Indirect, By Trust);
Common Stock — 1,029 shares (Direct)
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.
Key Figures
Options exercised: 3,000 shares
Option exercise price: $5.10/share
First sale tranche: 2,325 shares at $110.1057
+4 more
7 metrics
Options exercised
3,000 shares
Stock options exercised at $5.10 on March 31, 2026
Option exercise price
$5.10/share
Exercise price for 3,000 stock options
First sale tranche
2,325 shares at $110.1057
Open-market sale by trust on March 31, 2026
Second sale tranche
675 shares at $110.8268
Open-market sale by trust on March 31, 2026
Total shares sold
3,000 shares
Net open-market sales reported in Form 4
Indirect holdings after trades
6,760 shares
Celcuity common stock held by trust after March 31, 2026
Direct holdings after trades
1,029 shares
Celcuity common stock held directly after reported transactions
Key Terms
Rule 10b5-1 trading plan, Stock Option (right to buy, weighted average price, beneficially own, +1 more
5 terms
Rule 10b5-1 trading plan financial
"The sales and option exercise reported ... were effected pursuant to a Rule 10b5-1 trading plan..."
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.
Stock Option (right to buy financial
"security_title": "Stock Option (right to buy)"
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.
open-market sale financial
"transaction_action": "open-market sale""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What did Celcuity (CELC) director Richard Buller report in this Form 4?
Richard E. Buller reported exercising 3,000 stock options and selling 3,000 Celcuity common shares on March 31, 2026. The transactions were conducted through a trust where he and his spouse serve as trustees and beneficiaries, and he continues to beneficially own the trust’s holdings.
Were Richard Buller’s Celcuity (CELC) trades made under a Rule 10b5-1 plan?
Yes. The Form 4 notes that the sales and option exercise were effected under a Rule 10b5-1 trading plan adopted by the reporting person on December 8, 2025. Such plans are pre-arranged, which typically indicates the timing was set in advance.
What option exercise did Richard Buller report for Celcuity (CELC)?
A trust associated with Richard Buller exercised 3,000 stock options with an exercise price of $5.10 per share into Celcuity common stock on March 31, 2026. A footnote states the option was 100% vested at the time of exercise, and no remaining derivative position is shown.
Are Richard Buller’s Celcuity (CELC) holdings direct or through a trust?
The filing shows both. 6,760 Celcuity shares are held indirectly “By Trust,” where he and his spouse are trustees and beneficiaries, and he continues to beneficially own them. An additional 1,029 shares are listed as held directly in his own name.
AI-generated analysis. How Rhea-AI works. Not financial advice.
