MBX CEO sells 607 shares to cover tax obligations
MBX Biosciences President & CEO P. Kent Hawryluk reported a small share sale primarily to cover taxes.
Rhea-AI Filing Summary
MBX Biosciences President & CEO P. Kent Hawryluk reported a small share sale primarily to cover taxes. On May 6, he sold 607 shares of common stock at a weighted average price of $29.54 per share to satisfy tax obligations tied to vesting restricted stock units under a mandatory sell-to-cover arrangement.
After this transaction, he directly holds 727,667 common shares and also has 486,777 shares held indirectly through the P. Kent Hawryluk Revocable Trust dated January 25, 2011. The filing notes that he disclaims beneficial ownership of the trust shares except to the extent of any pecuniary interest.
Positive
- None.
Negative
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Insider Trade Summary
Net Seller: 607 shares
Net Sell
2 txns
Insider
Hawryluk P. Kent
Role
President & CEO
Sold
607 shs ($18K)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Common Stock | 607 | $29.54 | $18K |
| holding | Common Stock | -- | -- | -- |
Holdings After Transaction:
Common Stock — 727,667 shares (Direct);
Common Stock — 486,777 shares (Indirect, By Trust)
Footnotes (3)
- F1. The sales reported on this Form 4 represent shares of common stock sold by the Reporting Person to cover tax obligations in connection with the vesting of restricted stock units, pursuant to a mandatory sell-to-cover agreement between the Reporting Person and the Company.
- F2. The price reported in Column 4 is a weighted average price. These shares were sold on an aggregrate basis for all Company participants, at prices ranging from $29.23 to $29.88, 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 aggregrate number of shares sold at each separate price within the range set forth in this footnote.
- F3. Shares held by the P. Kent Hawryluk Revocable Trust dated January 25, 2011, of which the Reporting Person serves as trustee. The Reporting Person disclaims beneficial ownership except to the extent of any pecuniary interest therein, and this report shall not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose.
Key Figures
Shares sold: 607 shares
Weighted average sale price: $29.54 per share
Post-transaction direct holdings: 727,667 shares
+2 more
5 metrics
Shares sold
607 shares
Common stock sold May 6, 2026 to cover tax obligations
Weighted average sale price
$29.54 per share
Price for 607 shares sold in tax-related transaction
Post-transaction direct holdings
727,667 shares
Common stock directly held by CEO after sale
Indirect trust holdings
486,777 shares
Shares held by P. Kent Hawryluk Revocable Trust
Sale price range
$29.23–$29.88 per share
Range of market prices for aggregated participant sales
Key Terms
sell-to-cover, restricted stock units, weighted average price, Revocable Trust, +2 more
6 terms
sell-to-cover financial
"pursuant to a mandatory sell-to-cover agreement between the Reporting Person and the Company"
Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.
restricted stock units financial
"to cover tax obligations in connection with the vesting of restricted stock units"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
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.
Revocable Trust financial
"Shares held by the P. Kent Hawryluk Revocable Trust dated January 25, 2011"
A revocable trust is a legal arrangement where the person who creates it keeps control and can change or cancel the trust at any time, while naming who will manage and receive the assets later. Think of it like a flexible folder for your investments and property that can be relabeled or reworked as circumstances change; it matters to investors because it determines how ownership is recorded, how easily assets transfer on incapacity or death, and whether holdings bypass public probate proceedings.
beneficial ownership financial
"The Reporting Person disclaims beneficial ownership except to the extent of any pecuniary interest therein"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Section 16 regulatory
"not be deemed an admission that such shares are beneficially owned by him for Section 16 or any other purpose."
Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transaction did MBX (MBX) report for CEO P. Kent Hawryluk?
MBX reported that CEO P. Kent Hawryluk sold 607 shares of common stock at a weighted average price of $29.54 per share. The sale was made to cover tax obligations related to vesting restricted stock units under a mandatory sell-to-cover arrangement.
AI-generated analysis. How Rhea-AI works. Not financial advice.
