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Parabilis Medicines (PBLS) director converts preferred stock into common around IPO

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Parabilis Medicines director Edward M. Fitzgerald reported a series of non-cash conversions of preferred stock into common shares. On June 11, 2026, he converted Series B, C and F Preferred Stock into Common Stock, acquiring 5,539, 3,878 and 5,271 common shares, respectively, at $0.00 per share.

These preferred shares automatically converted into common immediately prior to the closing of the company’s initial public offering on June 9, 2026, as described in the footnotes. No shares were sold; all Form 4 transactions are coded as conversions of derivative securities. Following these transactions, Fitzgerald directly holds 14,688 shares of Common Stock.

Positive

  • None.

Negative

  • None.
Insider FITZGERALD EDWARD M
Role null
Type Security Shares Price Value
Conversion Series B Preferred Stock 5,332 $0.00 --
Conversion Series C Preferred Stock 3,666 $0.00 --
Conversion Series F Preferred Stock 8,111 $0.00 --
Conversion Common Stock 5,539 $0.00 --
Conversion Common Stock 3,878 $0.00 --
Conversion Common Stock 5,271 $0.00 --
Holdings After Transaction: Series B Preferred Stock — 0 shares (Direct, null); Series C Preferred Stock — 0 shares (Direct, null); Series F Preferred Stock — 0 shares (Direct, null); Common Stock — 5,539 shares (Direct, null)
Footnotes (1)
  1. Each share of Series B Preferred Stock was convertible into Common Stock on a 1 to 1.0389 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 immediately prior to the closing of the Issuer's initial public offering on June 9, 2026 (the "IPO"). The Series B Preferred Stock had no expiration date. Each share of Series C Preferred Stock was convertible into Common Stock on a 1 to 1.0578 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 immediately prior to the closing of the Issuer's initial public offering on June 9, 2026 (the "IPO"). The Series C Preferred Stock had no expiration date. Each share of Series F Preferred Stock was convertible into Common Stock on a 1 to 0.6498 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 immediately prior to the closing of the Issuer's initial public offering on June 9, 2026 (the "IPO"). The Series F Preferred Stock had no expiration date.
Common shares from Series B conversion 5,539 shares Non-derivative acquisition on June 11, 2026 via conversion
Common shares from Series C conversion 3,878 shares Non-derivative acquisition on June 11, 2026 via conversion
Common shares from Series F conversion 5,271 shares Non-derivative acquisition on June 11, 2026 via conversion
Common shares held after transactions 14,688 shares Direct common stock ownership following June 11, 2026 conversions
Preferred conversion activity 3 derivative conversions, 17,109 shares ExerciseShares in transactionSummary for June 11, 2026
Conversion of derivative security financial
"Each transaction is coded as a C with description "Conversion of derivative security"."
Series B Preferred Stock financial
"Each share of Series B Preferred Stock was 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 was 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 was 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.
initial public offering financial
"Preferred shares automatically converted immediately prior to the closing of the Issuer's initial public offering on June 9, 2026."
An initial public offering (IPO) is when a private company first sells its shares to the public and becomes a stock-listed company. It matters because it allows the company to raise money from a wide range of investors, helping it grow, while giving early shareholders a way to sell some of their ownership.
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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
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. Issuer Name and Ticker or Trading Symbol
Parabilis Medicines, Inc. [ PBLS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/09/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock06/11/2026C5,539A(1)5,539D
Common Stock06/11/2026C3,878A(2)9,417D
Common Stock06/11/2026C5,271A(3)14,688D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Series B Preferred Stock(1)06/11/2026C5,332 (1) (1)Common Stock5,539(1)0D
Series C Preferred Stock(2)06/11/2026C3,666 (2) (2)Common Stock3,878(2)0D
Series F Preferred Stock(3)06/11/2026C8,111 (3) (3)Common Stock5,271(3)0D
Explanation of Responses:
1. Each share of Series B Preferred Stock was convertible into Common Stock on a 1 to 1.0389 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 immediately prior to the closing of the Issuer's initial public offering on June 9, 2026 (the "IPO"). The Series B Preferred Stock had no expiration date.
2. Each share of Series C Preferred Stock was convertible into Common Stock on a 1 to 1.0578 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 immediately prior to the closing of the Issuer's initial public offering on June 9, 2026 (the "IPO"). The Series C Preferred Stock had no expiration date.
3. Each share of Series F Preferred Stock was convertible into Common Stock on a 1 to 0.6498 basis at any time at the option of the holder, and automatically converted into the number of shares shown in Column 7 immediately prior to the closing of the Issuer's initial public offering on June 9, 2026 (the "IPO"). The Series F Preferred Stock had no expiration date.
/s/ Teresa Jurgensen, Attorney-in-Fact06/15/2026
** 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 4 (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 4: SEC 1474 (03-26)

FAQ

What did Parabilis Medicines (PBLS) director Edward M. Fitzgerald report on this Form 4?

He reported non-cash conversions of preferred stock into common shares. On June 11, 2026, several series of preferred stock automatically converted into common in connection with Parabilis Medicines’ IPO, increasing his direct common stock holdings without any open-market purchases or sales.

Did Edward M. Fitzgerald buy or sell Parabilis Medicines (PBLS) stock in the market?

No, he neither bought nor sold shares in the open market. All reported transactions are coded as conversions of derivative securities, meaning preferred stock automatically converted into common stock, with no transaction price and no reported cash proceeds changing hands.

How many Parabilis Medicines (PBLS) common shares did Fitzgerald acquire through conversions?

He acquired multiple common share blocks via conversion: 5,539 shares, 3,878 shares, and 5,271 shares. Each block reflects automatic conversion of a different preferred stock series into common stock, as specified in the Form 4 transaction table and related footnotes.

What is Edward M. Fitzgerald’s Parabilis Medicines (PBLS) common stock position after these transactions?

After the reported conversions, his direct ownership stands at 14,688 common shares. This figure comes from the post-transaction “amount of securities beneficially owned” column, which reflects his direct common stock holdings following the automatic preferred-to-common conversions.

How are Parabilis Medicines (PBLS) preferred shares converted according to the Form 4 footnotes?

The footnotes state each preferred series had a fixed conversion ratio into common stock and converted automatically before the IPO closing on June 9, 2026. Series B, C and F Preferred Stock each converted into the specific common share amounts disclosed in the non-derivative transaction rows.