Septerna CPO sells 5,935 shares, exercises options
Septerna, Inc.’s Chief People Officer Samira Shaikhly reported an exercise-and-sell sequence in company stock.
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Form Type
4
Rhea-AI Filing Summary
Septerna, Inc.’s Chief People Officer Samira Shaikhly reported an exercise-and-sell sequence in company stock. She exercised options to acquire 5,935 shares of common stock at exercise prices of $1.55 and $2.76 per share, then sold 5,935 shares in open-market transactions at weighted average prices of $27.78, $28.79 and $29.66 per share, within ranges from $27.24 to $30.08. The sales were carried out under a pre-arranged Rule 10b5-1 sales plan adopted on October 31, 2025.
Insider Trade Summary 10b5-1
Exercise and Sale: 5,935 shares ($161K approx. pre-tax spread)
Exercise and Sale
9 txns
Insider
Shaikhly Samira
Role
Chief People Officer
Sold
5,935 shs ($172K)
Approx. gross sale proceeds
$172K
Approx. exercise cost
$11K
Approx. pre-tax spread
$161K
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Stock Option (Right to Buy) | 4,355 | $0.00 | $0.00 |
| Exercise | Stock Option (Right to Buy) | 943 | $0.00 | $0.00 |
| Exercise | Stock Option (Right to Buy) | 637 | $0.00 | $0.00 |
| Exercise | Common Stock | 4,355 | $1.55 | $7K |
| Exercise | Common Stock | 943 | $2.76 | $3K |
| Exercise | Common Stock | 637 | $2.76 | $2K |
| Sale | Common Stock | 1,700 | $27.7831 | $47K |
| Sale | Common Stock | 1,346 | $28.7928 | $39K |
| Sale | Common Stock | 2,889 | $29.6629 | $86K |
Holdings After Transaction:
Stock Option (Right to Buy) — 18,595 contracts (Direct);
Common Stock — 793 shares (Direct)
Footnotes (6)
- F1. This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on October 31, 2025.
- F2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $27.24 to $28.23. 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 sold at each separate price within the range.
- F3. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $28.25 to $29.15. 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 sold at each separate price within the range.
- F4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $29.29 to $30.08. 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 sold at each separate price within the range.
- F5. 25% of the shares underlying this option vested on February 1, 2024, with the remainder vesting in thirty-six substantially equal monthly installments thereafter, subject to the Reporting Person's continuous service the Issuer on each such date.
- F6. 1/48th of the shares subject to such option vest and become exercisable in substantially equal monthly installments on each monthly anniversary of March 1, 2024, subject to the Reporting Person's continuous service to the Issuer on each such date.
Key Figures
Shares sold: 5,935 shares
Sale price tranche 1: $27.7831/share
Sale price tranche 2: $28.7928/share
+4 more
7 metrics
Shares sold
5,935 shares
Net common stock sold by insider on June 1, 2026
Sale price tranche 1
$27.7831/share
Weighted average price for 1,700 common shares sold
Sale price tranche 2
$28.7928/share
Weighted average price for 1,346 common shares sold
Sale price tranche 3
$29.6629/share
Weighted average price for 2,889 common shares sold
Exercise price 1
$1.55/share
Stock options exercised into 4,355 common shares
Exercise price 2
$2.76/share
Stock options exercised into 1,580 common shares (637 + 943)
Sale price range
$27.24–$30.08/share
Intraday ranges across reported sale transactions
Key Terms
Rule 10b5-1 sales plan, weighted average price, Stock Option (Right to Buy), derivative security, +1 more
5 terms
Rule 10b5-1 sales plan financial
"This transaction was effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on October 31, 2025."
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.
Stock Option (Right to Buy) financial
"security_title: Stock Option (Right to Buy)"
derivative security financial
"transaction_code_description: Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
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 insider transactions did Septerna (SEPN) report for Samira Shaikhly?
Septerna’s Chief People Officer Samira Shaikhly exercised options for 5,935 shares of common stock and sold 5,935 shares in open-market transactions. These trades occurred on June 1, 2026 and were disclosed in a Form 4 insider filing.
Were Septerna (SEPN) insider sales by Samira Shaikhly made under a Rule 10b5-1 plan?
Yes. The filing states the sales were effected under a Rule 10b5-1 sales plan adopted on October 31, 2025. Such pre-arranged plans schedule trades in advance, making transaction timing more routine rather than discretionary.
What options did Septerna (SEPN) insider Samira Shaikhly exercise?
Samira Shaikhly exercised stock options covering 5,935 shares of Septerna common stock at exercise prices of $1.55 and $2.76 per share. These exercises converted derivative securities into common shares as part of the reported activity.
AI-generated analysis. How Rhea-AI works. Not financial advice.
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