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Parabilis Medicines (PBLS) CMO reports 601,078-share stock option grants

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
3

Rhea-AI Filing Summary

Parabilis Medicines, Inc. Chief Medical Officer Mohammed Fawzi Benzaghou reported his initial beneficial ownership on Form 3, showing two stock option awards for common stock. One option covers 243,680 underlying shares at an exercise price of $3.14 per share, expiring on February 17, 2036.

The second option covers 357,398 underlying shares at an exercise price of $2.42 per share, expiring on September 10, 2035. Vesting is time-based: one grant vests 25% on September 2, 2026 with the rest monthly over 36 months, and the other vests in 48 equal monthly installments starting February 9, 2026, subject to continued service.

Positive

  • None.

Negative

  • None.
Insider Benzaghou Mohammed Fawzi
Role Chief Medical Officer
Type Security Shares Price Value
holding Stock Option (right to buy) -- -- --
holding Stock Option (right to buy) -- -- --
Holdings After Transaction: Stock Option (right to buy) — 357,398 shares (Direct, null)
Footnotes (1)
  1. 25% of the shares subject to this option shall vest and become exercisable on September 2, 2026 with the remainder vesting in thirty-six (36) equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date. The shares subject to this option shall vest and become exercisable in forty-eight (48) equal monthly installments commencing from February 9, 2026, subject to the Reporting Person's continued service on each such vesting date.
Underlying shares (grant 1) 243,680 shares Stock option on common stock, exercise price $3.14
Exercise price (grant 1) $3.14/share Stock option, expires February 17, 2036
Underlying shares (grant 2) 357,398 shares Stock option on common stock, exercise price $2.42
Exercise price (grant 2) $2.42/share Stock option, expires September 10, 2035
Total underlying shares 601,078 shares Combined underlying common shares from two option grants
Vesting start (grant 1) September 2, 2026 25% cliff vest, remainder monthly over 36 months
Vesting start (grant 2) February 9, 2026 Vests in 48 equal monthly installments
Stock Option (right to buy) financial
"security_title: Stock Option (right to buy)"
underlying security financial
"underlying_security_title: Common Stock; underlying_security_shares listed"
exercise price financial
"conversion_or_exercise_price: 3.1400 and 2.4200"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
vesting financial
"shares subject to this option shall vest and become exercisable"
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
Form 3 regulatory
"INSIDER FILING DATA (Form 3)"
Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.
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Learn about SEC filing dates
SEC Form 3
FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0104
Estimated average burden
hours per response:0.5
1. Name and Address of Reporting Person*
Benzaghou Mohammed Fawzi

(Last)(First)(Middle)
C/O PARABILIS MEDICINES, INC.
30 ACORN PARK DRIVE, 6TH FLOOR

(Street)
CAMBRIDGE MASSACHUSETTS 02140

(City)(State)(Zip)

UNITED STATES

(Country)
2. Date of Event Requiring Statement (Month/Day/Year)
06/09/2026
3. Issuer Name and Ticker or Trading Symbol
Parabilis Medicines, Inc. [ PBLS ]
3a. Foreign Trading Symbol
5. If Amendment, Date of Original Filed (Month/Day/Year)
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Medical Officer
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year)3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (right to buy) (1)09/10/2035Common Stock357,398$2.42D
Stock Option (right to buy) (2)02/17/2036Common Stock243,680$3.14D
Explanation of Responses:
1. 25% of the shares subject to this option shall vest and become exercisable on September 2, 2026 with the remainder vesting in thirty-six (36) equal monthly installments thereafter, subject to the Reporting Person's continued service on each such vesting date.
2. The shares subject to this option shall vest and become exercisable in forty-eight (48) equal monthly installments commencing from February 9, 2026, subject to the Reporting Person's continued service on each such vesting date.
Remarks:
Exhibit 24 - Power of Attorney
/s/ Teresa Jurgensen, Attorney-in-Fact06/09/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does Parabilis Medicines (PBLS) disclose in this Form 3 filing?

Parabilis Medicines (PBLS) discloses Chief Medical Officer Mohammed Fawzi Benzaghou’s initial beneficial ownership of two stock option awards. The filing details option sizes, exercise prices, expiration dates, and time-based vesting schedules tied to his continued service with the company.

How many Parabilis Medicines (PBLS) shares are covered by the CMO’s stock options?

The CMO’s reported stock options cover a total of 601,078 underlying PBLS common shares. One grant relates to 243,680 shares and a second to 357,398 shares, providing equity-based incentives aligned with his ongoing service at Parabilis Medicines.

What are the exercise prices of the Parabilis Medicines (PBLS) stock options?

The reported Parabilis Medicines (PBLS) stock options have exercise prices of $3.14 and $2.42 per share. These prices represent the cost per share to acquire PBLS common stock once the respective options have vested and are exercisable, subject to continued service conditions.

When do the Parabilis Medicines (PBLS) CMO’s stock options expire?

The CMO’s PBLS stock options expire on February 17, 2036 and September 10, 2035. These expiration dates define the last days on which vested options can be exercised to purchase Parabilis Medicines common stock before they lapse.

How do the Parabilis Medicines (PBLS) stock options vest for the CMO?

One PBLS option vests 25% on September 2, 2026, with the remaining 75% vesting in 36 equal monthly installments. The other vests in 48 equal monthly installments starting February 9, 2026. Vesting is contingent on the CMO’s continued service on each vesting date.

Does this Parabilis Medicines (PBLS) Form 3 show any stock purchases or sales?

This PBLS Form 3 does not show stock purchases or sales; it reports existing derivative holdings. It lists the Chief Medical Officer’s stock option positions, including share amounts, exercise prices, expiration dates, and vesting schedules, rather than recording open-market trading activity.