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Emerald Bioventures boosts common stake in Galera Therapeutics (GRTX)

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

Rhea-AI Filing Summary

Galera Therapeutics, Inc. reported a major ownership change as a key holder converted preferred stock into common shares. On May 15, 2026, Emerald Bioventures, LLC converted 20,813.8186 shares of Galera’s Series B Non-Voting Convertible Preferred Stock into 20,813,818 shares of common stock, based on a 1,000:1 Conversion Ratio.

After this derivative conversion, Emerald directly held 61,029,978 shares of Galera common stock. No fractional common shares were issued; instead, Galera will pay Emerald cash equal to the trading value of the fractional share amount on the conversion date. The filing is made jointly by Emerald and Timothy Opler, who is the managing member of Emerald and may be deemed to beneficially own the securities held by Emerald.

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Insider Emerald Bioventures, LLC, Opler Timothy
Role null | null
Type Security Shares Price Value
Conversion Series B Preferred Stock 20,813.819 $0.00 --
Conversion Common Stock 20,813,818 $0.00 --
Holdings After Transaction: Series B Preferred Stock — 0 shares (Direct, null); Common Stock — 61,029,978 shares (Direct, null)
Footnotes (1)
  1. Pursuant to the Certificate of Designation of Preferences, Rights and Limitations of the Series B Non-Voting Convertible Preferred Stock, as amended ("Certificate of Designation"), no fractional shares were issued upon conversion. In lieu of fractional shares, the Issuer will pay Emerald Bioventures, LLC ("Emerald") an amount in cash equal to the trading value of such fractional shares as of the close of business on the date of the conversion in accordance with the Certificate of Designation. This Form 4 is jointly filed by and on behalf of each of Emerald and Timothy Opler. Emerald is the record and direct beneficial owner of the securities reported herein. Mr. Opler is the managing member of Emerald and may be deemed to beneficially own securities owned by Emerald. Represents 20,813.8186192892 shares of the Issuer's Series B Non Voting Convertible Preferred Stock (the "Series B Preferred Stock"). On May 15, 2026, the Issuer converted all outstanding Series B Preferred Stock into a number of shares of the Issuer's Common Stock ("Common Stock") calculated based on the Conversion Ratio (defined as 1,000 shares of Common Stock issuable upon the conversion of each share of Series B Preferred Stock), pursuant to and in accordance with the Certificate of Designation. The shares of Series B Preferred Stock have no expiration date.
Common shares acquired via conversion 20,813,818 shares Common stock issued upon Series B conversion on May 15, 2026
Series B preferred shares converted 20,813.8186 shares Series B Non-Voting Convertible Preferred Stock fully converted
Post-transaction common holdings 61,029,978 shares Common stock held directly by Emerald after conversion
Conversion Ratio 1,000 common shares per preferred share Defined in Certificate of Designation for Series B Preferred
Exercise/Conversion count 1 derivative exercise transactionSummary exerciseCount for the Form 4
Series B Non-Voting Convertible Preferred Stock financial
"Represents 20,813.8186192892 shares of the Issuer's Series B Non Voting Convertible Preferred Stock"
A Series B non-voting convertible preferred stock is a class of company shares that gives holders financial priority—such as fixed dividends and first claim on assets if the company is sold—while not granting voting rights. It can be converted into regular common shares under set conditions, which matters to investors because conversion can increase upside participation but also dilute existing owners; the preference reduces downside risk like a safety buffer.
Certificate of Designation regulatory
"Pursuant to the Certificate of Designation of Preferences, Rights and Limitations of the Series B"
A certificate of designation is a formal document that spells out the specific rights and rules attached to a particular class or series of stock, usually preferred shares. Think of it as a rulebook or menu that lists dividend terms, liquidation priority, conversion or redemption rights and any special voting protections; investors use it to judge how much income, control or downside protection those shares will provide compared with other securities.
Conversion Ratio financial
"calculated based on the Conversion Ratio (defined as 1,000 shares of Common Stock issuable"
The conversion ratio is the number of common shares an investor receives when a convertible security (like a bond or preferred share) or an exchangeable instrument is turned into ordinary stock. It matters because it tells investors how much ownership or dilution will occur — similar to knowing how many slices you get when you trade in a coupon — and directly affects the value you get from the convertible and the company’s future share count.
beneficially own financial
"Mr. Opler is the managing member of Emerald and may be deemed to beneficially own securities owned by Emerald"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
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*
Emerald Bioventures, LLC

(Last)(First)(Middle)
555 MADISON AVENUE, SUITE 11D

(Street)
NEW YORK NEW YORK 10022

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Galera Therapeutics, Inc. [ GRTX ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
DirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
XForm 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 Stock05/15/2026C20,813,818(1)A(3)61,029,978D(2)
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(3)05/15/2026C20,813.8186(1) (3) (3)Common Stock20,813,818(3)0D(2)
1. Name and Address of Reporting Person*
Emerald Bioventures, LLC

(Last)(First)(Middle)
555 MADISON AVENUE, SUITE 11D

(Street)
NEW YORK NEW YORK 10022

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Opler Timothy

(Last)(First)(Middle)
555 MADISON AVENUE, SUITE 11D

(Street)
NEW YORK NEW YORK 10022

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
Explanation of Responses:
1. Pursuant to the Certificate of Designation of Preferences, Rights and Limitations of the Series B Non-Voting Convertible Preferred Stock, as amended ("Certificate of Designation"), no fractional shares were issued upon conversion. In lieu of fractional shares, the Issuer will pay Emerald Bioventures, LLC ("Emerald") an amount in cash equal to the trading value of such fractional shares as of the close of business on the date of the conversion in accordance with the Certificate of Designation.
2. This Form 4 is jointly filed by and on behalf of each of Emerald and Timothy Opler. Emerald is the record and direct beneficial owner of the securities reported herein. Mr. Opler is the managing member of Emerald and may be deemed to beneficially own securities owned by Emerald.
3. Represents 20,813.8186192892 shares of the Issuer's Series B Non Voting Convertible Preferred Stock (the "Series B Preferred Stock"). On May 15, 2026, the Issuer converted all outstanding Series B Preferred Stock into a number of shares of the Issuer's Common Stock ("Common Stock") calculated based on the Conversion Ratio (defined as 1,000 shares of Common Stock issuable upon the conversion of each share of Series B Preferred Stock), pursuant to and in accordance with the Certificate of Designation. The shares of Series B Preferred Stock have no expiration date.
/s/ Timothy Opler, Managing Member05/29/2026
/s/ Timothy Opler05/29/2026
** 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 insider transaction did Galera Therapeutics (GRTX) disclose in this Form 4?

Galera Therapeutics disclosed that Emerald Bioventures, LLC converted Series B Non-Voting Convertible Preferred Stock into common stock. The transaction reflects a derivative conversion rather than an open-market buy or sell, changing the form of Emerald’s stake while maintaining its economic exposure.

How many Galera Therapeutics (GRTX) common shares were issued in the conversion?

The conversion resulted in 20,813,818 shares of Galera Therapeutics common stock being issued to Emerald Bioventures, LLC. This was based on a 1,000:1 Conversion Ratio applied to 20,813.8186 shares of Series B Non-Voting Convertible Preferred Stock outstanding on the conversion date.

What is Emerald Bioventures’ ownership in Galera Therapeutics (GRTX) after the transaction?

After the conversion, Emerald Bioventures directly held 61,029,978 shares of Galera Therapeutics common stock. This makes Emerald a significant ten percent owner, with the Form 4 reflecting its updated position following the full conversion of its Series B preferred shares.

What Conversion Ratio applied to Galera Therapeutics (GRTX) Series B Preferred Stock?

Each share of Galera’s Series B Non-Voting Convertible Preferred Stock was convertible into 1,000 shares of common stock. The issuer converted all outstanding Series B Preferred Stock using this 1,000:1 Conversion Ratio, as specified in the Certificate of Designation governing these preferred shares.

How were fractional shares handled in the Galera Therapeutics (GRTX) conversion?

No fractional common shares were issued in the conversion. Instead, Galera will pay Emerald Bioventures cash equal to the trading value of any fractional shares as of the close of business on the conversion date, consistent with the Certificate of Designation terms.

What is Timothy Opler’s relationship to Emerald Bioventures and Galera Therapeutics (GRTX) shares?

The Form 4 states it is jointly filed by Emerald Bioventures and Timothy Opler. Emerald is the record and direct beneficial owner of the Galera shares, while Opler, as Emerald’s managing member, may be deemed to beneficially own the securities held by Emerald.