Parabilis officer reports 519,851 stock options

Parabilis Medicines, Inc. officer Helen Huei-in Ho reported an initial holding of stock options on a Form 3.

Accepted by SEC EDGAR 06/09/2026 - 09:11 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Parabilis Medicines, Inc. officer Helen Huei-in Ho reported an initial holding of stock options on a Form 3. These options cover 519,851 shares of common stock at an exercise price of $4.09 per share and expire on April 20, 2036.

According to the vesting terms, 25% of the shares subject to the option will vest and become exercisable on April 13, 2027, with the remaining 75% vesting in 36 equal monthly installments, subject to her continued service. This filing discloses her equity-based compensation position rather than any buy or sell transaction.

Insider Trade Summary

Holdings reported, no transactions

Holdings

Insider Ho Helen Huei-in

Role See Remarks

Type	Security	Shares	Price	Value
Holding	Stock Option (right to buy)	--	--	--

Holdings: Stock Option (right to buy) — 519,851 contracts (Direct)

Footnotes (1)

1. F1. 25% of the shares subject to this option shall vest and become exercisable on April 13, 2027 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.

Key Figures

Underlying option shares: 519,851 shares Exercise price: $4.09 per share Option expiration: April 20, 2036 +2 more

5 metrics

Underlying option shares 519,851 shares Common stock underlying reported stock option holding

Exercise price $4.09 per share Stock option exercise price for common stock

Option expiration April 20, 2036 Expiration date of stock option

Initial vesting tranche 25% on April 13, 2027 First vesting date for option shares

Remaining vesting schedule 36 monthly installments Remaining 75% vests monthly after April 13, 2027

Key Terms

Stock Option (right to buy), exercise price, expiration date, vesting

4 terms

Stock Option (right to buy) financial

"security_title: Stock Option (right to buy)"

exercise price financial

"exercisePrice: 4.0900 is the option exercise price"

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.

expiration date financial

"expirationDate: 2036-04-20T00:00:00.000Z is the expiration date"

The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.

vesting financial

"25% of the 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.

FAQ

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

What does the Parabilis Medicines (PBLS) Form 3 for Helen Huei-in Ho disclose?

The Form 3 shows officer Helen Huei-in Ho holds stock options over 519,851 Parabilis Medicines common shares. These options have a $4.09 exercise price and expire on April 20, 2036, disclosing her existing equity-based compensation position rather than any recent trade.

How many Parabilis Medicines (PBLS) shares are subject to Helen Ho’s stock options?

Helen Ho’s reported stock option covers 519,851 underlying shares of Parabilis Medicines common stock. This reflects the number of shares she may purchase upon exercise, subject to vesting and continued service conditions described in the Form 3 footnote.

What is the exercise price and expiration date of Helen Ho’s PBLS stock options?

The options reported by Helen Ho have a $4.09 per share exercise price and expire on April 20, 2036. This means she can buy PBLS shares at $4.09, once vested, any time before the April 2036 expiration date if she chooses to exercise.

How do Helen Ho’s Parabilis Medicines stock options vest over time?

Twenty-five percent of the option shares vest on April 13, 2027, with the remaining 75% vesting in 36 equal monthly installments. Vesting is conditioned on Helen Ho’s continued service with Parabilis Medicines on each monthly vesting date, aligning compensation with ongoing employment.

Does the PBLS Form 3 for Helen Ho show any recent stock purchases or sales?

The Form 3 does not report any recent stock purchases or sales by Helen Ho. Instead, it discloses her existing stock option position and its vesting schedule, serving as an initial ownership statement for her derivative equity holdings in Parabilis Medicines.

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

Understanding Insider Trading Forms →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

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^*

Ho Helen Huei-in

(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)

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

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
Stock Option (right to buy)	(1)	04/20/2036	Common Stock	519,851	$4.09	D

Explanation of Responses:

1. 25% of the shares subject to this option shall vest and become exercisable on April 13, 2027 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.

Remarks:

Exhibit 24 - Power of Attorney; Title: Chief Business and Strategy Officer

	/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)