Parabilis director Jake Simson files Form 3

Parabilis Medicines, Inc. director Jake Simson has filed an initial Form 3 ownership report.

Accepted by SEC EDGAR 06/09/2026 - 09:06 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Parabilis Medicines, Inc. director Jake Simson has filed an initial Form 3 ownership report. This filing identifies him as a director of the company but, in the provided data, shows no reported transactions or specific equity holdings. It serves as a baseline disclosure of his insider status.

Key Terms

Form 3, reporting person, director

3 terms

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.

reporting person regulatory

""reportingPersons": [ { "name": "Simson Jake""

director financial

""is_director": 1"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does the Parabilis Medicines (PBLS) Form 3 filing by Jake Simson show?

The Form 3 filing lists Jake Simson as a director of Parabilis Medicines, Inc. It is an initial ownership report and, in the provided data, does not list any specific share holdings or transactions for him.

Did Jake Simson report any stock transactions in Parabilis Medicines (PBLS) on this Form 3?

No transactions are shown for Jake Simson in the provided Form 3 data. The transaction summary reports zero buys, zero sells, and zero derivative exercises, indicating only his insider status is being disclosed here.

Does the Parabilis Medicines (PBLS) Form 3 disclose how many shares Jake Simson owns?

The provided Form 3 data does not list any specific share holdings for Jake Simson. Holding entries and derivative positions are both shown as zero, so no detailed ownership amounts appear in this excerpt.

What is the significance of a Form 3 filing for Parabilis Medicines (PBLS) investors?

A Form 3 identifies a new insider, such as a director or officer, at the time they become subject to reporting. It establishes a starting point for future Forms 4 and 5, which will report any subsequent trades or changes in their holdings.

Is Jake Simson reported as a ten percent owner of Parabilis Medicines (PBLS) on this Form 3?

No, the Form 3 data flags Jake Simson as a director but not as a ten percent owner. The is_ten_percent_owner field is set to zero, indicating he is not reported as holding at least ten percent of the company’s shares here.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 3

FORM 3

UNITED 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^*

Simson Jake

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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 Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit 24 - Power of Attorney

No securities are beneficially owned.

	/s/ Teresa Jurgensen, Attorney-in-Fact	06/09/2026
	** Signature of Reporting Person	Date
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)