Zung Jonathan B. 4

What Happened

• Jonathan B. Zung, Chief Development Officer of Curis, converted Series B Convertible Non-Redeemable Preferred Stock into common stock. The filing shows an acquisition of 66,667 common shares resulting from the automatic conversion of the Series B preferred securities on March 20, 2026. The conversion was made at no additional consideration under the Certificate of Designations.
• The footnote indicates each Series B preferred share converted into 1,333.33 common shares and that the Securities (one Series B preferred share plus associated Series A, B and C warrants) were originally sold to the reporting person at $1,000 per Security. The conversion reflects roughly 50 Securities (50 × $1,000 = $50,000 original purchase price).

Key Details

• Transaction date: March 20, 2026; reported on Form 4 filed March 23, 2026 (timely).
• Conversion ratio: 1,333.33 common shares per Series B preferred share; filing reports 66,667 common shares acquired (reflecting conversion of ~50 Series B preferred shares).
• Consideration: conversion was automatic and for no additional consideration; original Securities were purchased at $1,000 per Security (per footnote).
• Related entries: the Form 4 also lists a disposition entry for 50 derivative shares (this corresponds to the Series B preferred securities that were converted).
• Shares owned after the transaction: not specified in the provided excerpt of the filing.
• Not marked as a gift, sale, or 10b5-1 plan; coded as conversion of a derivative security (code C).

Context

• This is a conversion of preferred stock into common stock (a non-cash corporate action), not an open-market buy or sale; such conversions change share count but do not necessarily signal a personal purchase or sale decision.
• The Securities included warrants (per the footnote); this filing documents the preferred-to-common conversion specifically.