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Parabilis (PBLS) director Edward Fitzgerald details preferred stock and option holdings

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

Rhea-AI Filing Summary

Parabilis Medicines, Inc. director Edward M. Fitzgerald filed an initial ownership report showing his existing preferred stock and option positions in the company. The filing lists Series B, C and F Preferred Stock that are each convertible into Common Stock on fixed ratios and will automatically convert into specified numbers of Common shares immediately prior to the closing of the company’s initial public offering, without additional payment. Fitzgerald also holds stock options over Common Stock, including 32,490 shares at an exercise price of $3.14 per share expiring in 2036, 16,245 shares at $4.82 per share expiring in 2031, and 16,245 shares at $1.85 per share expiring in 2027. One option grant is fully vested, while another is scheduled to vest in 48 equal monthly installments starting February 24, 2026, subject to his continued service.

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Insider FITZGERALD EDWARD M
Role null
Type Security Shares Price Value
holding Stock Option (right to buy) -- -- --
holding Stock Option (right to buy) -- -- --
holding Stock Option (right to buy) -- -- --
holding Series B Preferred Stock -- -- --
holding Series C Preferred Stock -- -- --
holding Series F Preferred Stock -- -- --
Holdings After Transaction: Stock Option (right to buy) — 16,245 shares (Direct, null); Series B Preferred Stock — 5,539 shares (Direct, null); Series C Preferred Stock — 3,878 shares (Direct, null); Series F Preferred Stock — 5,271 shares (Direct, null)
Footnotes (1)
  1. The shares subject to this option are fully vested. The shares subject to this option shall vest and become exercisable in forty-eight (48) equal monthly installments commencing from February 24, 2026, subject to the Reporting Person's continued service on each such vesting date. Each share of Series B Preferred Stock is convertible into Common Stock on a 1 to 1.0389 basis at any time at the option of the holder, and will automatically convert into the number of shares shown in Column 3 immediately prior to the closing of the Issuer's initial public offering (the "IPO") and without payment of consideration. The Series B Preferred Stock has no expiration date. Each share of Series C Preferred Stock is convertible into Common Stock on a 1 to 1.0578 basis at any time at the option of the holder, and will automatically convert into the number of shares shown in Column 3 immediately prior to the closing of the IPO and without payment of consideration. The Series C Preferred Stock has no expiration date. Each share of Series F Preferred Stock is convertible into Common Stock on a 1 to 0.6498 basis at any time at the option of the holder, and will automatically convert into the number of shares shown in Column 3 immediately prior to the closing of the IPO and without payment of consideration. The Series F Preferred Stock has no expiration date.
Series B underlying shares 5,539 shares Underlying Common Stock from Series B Preferred
Series C underlying shares 3,878 shares Underlying Common Stock from Series C Preferred
Series F underlying shares 5,271 shares Underlying Common Stock from Series F Preferred
Option at $3.14 32,490 shares at $3.14/share Stock option expiring February 23, 2036
Option at $4.82 16,245 shares at $4.82/share Stock option expiring May 12, 2031
Option at $1.85 16,245 shares at $1.85/share Stock option expiring July 30, 2027
Vesting schedule 48 monthly installments Option vesting from February 24, 2026, with continued service
Series B Preferred Stock financial
"Each share of Series B Preferred Stock is convertible into Common Stock on a 1 to 1.0389 basis"
Series B preferred stock is a type of ownership share issued by a company that offers certain advantages over common stock, such as priority in receiving dividends or assets if the company is sold or liquidated. It is typically issued after an initial round of funding, making it a way for investors to support a company's growth while gaining some protections and benefits. This stock matters to investors because it often provides a more secure investment position with potential for future growth.
Series C Preferred Stock financial
"Each share of Series C Preferred Stock is convertible into Common Stock on a 1 to 1.0578 basis"
A Series C preferred stock is a specific class of ownership issued during a later funding round that gives holders priority over common shareholders for getting paid and receiving dividends, like having a reserved lane in traffic when money is distributed. It often includes agreed rights such as a fixed payout, protection against dilution, and the option to convert into common shares, so investors treat it as a mix of safety and upside potential.
Series F Preferred Stock financial
"Each share of Series F Preferred Stock is convertible into Common Stock on a 1 to 0.6498 basis"
Series F preferred stock is a class of company shares that gives holders priority over common shareholders for dividend payments and for getting money back if the company is sold or liquidated, much like a ticket that moves you to the front of the line. These shares often carry a fixed dividend and special rights—sometimes including conversion into common stock—so investors consider them when weighing income, downside protection and potential ownership dilution.
Stock Option (right to buy) financial
"Stock Option (right to buy) with underlying Common Stock shares and exercise prices"
initial public offering (the "IPO") financial
"will automatically convert into the number of shares shown in Column 3 immediately prior to the closing of the Issuer's initial public offering (the "IPO")"
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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*
FITZGERALD EDWARD M

(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
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)07/30/2027Common Stock16,245$1.85D
Stock Option (right to buy) (1)05/12/2031Common Stock16,245$4.82D
Stock Option (right to buy) (2)02/23/2036Common Stock32,490$3.14D
Series B Preferred Stock (3) (3)Common Stock5,539(3)D
Series C Preferred Stock (4) (4)Common Stock3,878(4)D
Series F Preferred Stock (5) (5)Common Stock5,271(5)D
Explanation of Responses:
1. The shares subject to this option are fully vested.
2. The shares subject to this option shall vest and become exercisable in forty-eight (48) equal monthly installments commencing from February 24, 2026, subject to the Reporting Person's continued service on each such vesting date.
3. Each share of Series B Preferred Stock is convertible into Common Stock on a 1 to 1.0389 basis at any time at the option of the holder, and will automatically convert into the number of shares shown in Column 3 immediately prior to the closing of the Issuer's initial public offering (the "IPO") and without payment of consideration. The Series B Preferred Stock has no expiration date.
4. Each share of Series C Preferred Stock is convertible into Common Stock on a 1 to 1.0578 basis at any time at the option of the holder, and will automatically convert into the number of shares shown in Column 3 immediately prior to the closing of the IPO and without payment of consideration. The Series C Preferred Stock has no expiration date.
5. Each share of Series F Preferred Stock is convertible into Common Stock on a 1 to 0.6498 basis at any time at the option of the holder, and will automatically convert into the number of shares shown in Column 3 immediately prior to the closing of the IPO and without payment of consideration. The Series F Preferred Stock has no expiration 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 the Parabilis Medicines (PBLS) Form 3 filing show for Edward M. Fitzgerald?

The Form 3 shows director Edward M. Fitzgerald’s existing holdings in Parabilis Medicines, including convertible Series B, C and F Preferred Stock into Common Stock and several stock option grants over Common shares, with detailed exercise prices, share amounts and expirations.

How many Parabilis Medicines (PBLS) Common shares underlie Edward Fitzgerald’s preferred stock?

The filing lists underlying Common Stock of 5,539 shares for Series B Preferred, 3,878 shares for Series C Preferred, and 5,271 shares for Series F Preferred, each convertible at fixed ratios and automatically converting into these amounts immediately before the company’s initial public offering closes.

What stock options in Parabilis Medicines (PBLS) does Edward Fitzgerald hold?

Edward Fitzgerald holds options over 32,490 Common shares at $3.14 per share expiring February 23, 2036, 16,245 shares at $4.82 per share expiring May 12, 2031, and 16,245 shares at $1.85 per share expiring July 30, 2027, all reported as directly owned.

How do Edward Fitzgerald’s Parabilis (PBLS) preferred shares convert into Common Stock?

Each preferred series converts into Common Stock at a fixed ratio and, according to the filing, will automatically convert into the stated number of underlying Common shares immediately prior to the closing of Parabilis’s initial public offering, without additional consideration or an expiration date for the preferred shares.

What are the vesting terms of Edward Fitzgerald’s Parabilis Medicines (PBLS) stock options?

One option grant is fully vested, meaning all related shares are currently exercisable. Another grant vests in 48 equal monthly installments beginning February 24, 2026, contingent on Fitzgerald’s continued service with Parabilis Medicines on each scheduled vesting date.