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Emerald backs Galera–Obsidian deal with 26.5% Galera (GRTX) stake

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13D

Rhea-AI Filing Summary

Emerald Bioventures, LLC and Timothy Opler report beneficial ownership of 40,216,160 shares of Galera Therapeutics common stock, representing approximately 26.5% of the class. This stake reflects Nova Pharmaceuticals merger consideration, a December 2024 private placement, and a partial mandatory conversion of Series B preferred stock.

Emerald bought 3,057,973 Galera common shares for about $199,991 in the December 2024 private placement and received Series B Non-Voting Convertible Preferred Stock in the Nova merger. On April 7, 2026, 37,158.1873807108 Series B shares converted into 37,158,187 common shares, leaving 20,813.8186192892 Series B shares, which are not yet convertible without shareholder approval.

Emerald and other insiders entered stockholder support agreements covering about 51.1% of Galera’s outstanding capital stock to vote in favor of Galera’s planned merger with Obsidian Therapeutics and related transactions. The filing states the position is held for investment, while preserving flexibility to buy or sell Galera securities over time.

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Insights

Emerald’s 26.5% Galera stake and support pact strengthen merger alignment.

Emerald Bioventures and Timothy Opler disclose beneficial ownership of 40,216,160 Galera common shares, or 26.5% of outstanding stock. This position arises from the Nova Pharmaceuticals merger, a December 2024 private placement, and a partial mandatory conversion of Series B preferred stock into common.

The filing notes stockholder support agreements, including Emerald, covering approximately 51.1% of Galera’s outstanding capital stock in favor of the planned mergers with Obsidian Therapeutics. This level of locked-up support increases visibility into shareholder alignment around the Obsidian transaction as described in the Obsidian Merger Agreement and related documents.

Emerald retains 20,813.8186192892 Series B preferred shares that are not currently convertible without shareholder approval under the Certificate of Designation. Future company filings may clarify how remaining preferred shares are treated as the Obsidian transaction and related corporate actions progress.

Beneficial ownership 40,216,160 shares Galera common stock beneficially owned as of filing
Ownership percentage 26.5% Portion of Galera common stock class represented by Emerald and Opler
Shares outstanding baseline 151,941,554 shares Assumed Galera common shares outstanding for percentage calculation
Private placement purchase 3,057,973 shares for ~$199,991 Common shares bought at $0.0654 per share in December 2024
Private placement total size 44,111,260 shares and pre-funded warrants for $2,885,000 Aggregate securities sold to investors in December 2024 private placement
Mandatory conversion amount 37,158.1873807108 Series B shares into 37,158,187 common shares Partial mandatory conversion effective April 7, 2026
Remaining Series B Preferred 20,813.8186192892 shares Series B Preferred Stock still held by Emerald after partial conversion
Support agreement coverage 51.1% of capital stock Outstanding Galera capital stock subject to stockholder support agreements
Series B Non-Voting Convertible Preferred Stock financial
"At the Closing, Emerald acquired 127,000 shares of 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.
Pre-Funded Warrants financial
"the Issuer agreed to sell to the Investors an aggregate of 44,111,260 shares of Common Stock and pre-funded warrants"
Pre-funded warrants are financial instruments that give investors the right to purchase a company's stock at a set price, but with most or all of the purchase price paid upfront. They function like a coupon or gift card for stock, allowing investors to buy shares later at a fixed price, which can be beneficial if they want to avoid future price increases. This makes them important for investors seeking flexibility and certainty in their investment plans.
Mandatory Conversion financial
"the Issuer may elect to convert, in whole or in part, outstanding shares of Series B Preferred Stock into a number of shares of Common Stock"
Mandatory conversion is a rule that forces certain convertible securities—like bonds or preferred shares—to be turned into common stock when specific conditions are met (for example, a date arrives or a price target is hit). For investors this matters because it increases the number of shares outstanding and can dilute existing ownership, shifting value from fixed-income holders into equity holders and changing a company’s risk and return profile, much like an automatic trade that swaps a guaranteed payment for an ownership stake.
Registration Rights Agreement regulatory
"the Issuer entered into a Registration Rights Agreement with the Investors"
A registration rights agreement is a contract that gives investors the option to have their ownership stakes officially registered with the government, making it easier to sell their shares later. This agreement matters because it provides investors with a clearer path to cash out their investments if they choose, offering more liquidity and confidence in their ability to sell their holdings when desired.
Stockholder Support Agreements financial
"stockholders of the Issuer, including Emerald, holding an aggregate of approximately 51.1% of the Issuer's outstanding capital stock entered into support agreements"
beneficially own financial
"the Reporting Persons may be deemed to beneficially own 40,216,160 shares of Common Stock"
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.
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36338D108

(CUSIP Number)
Timothy Opler
c/o Emerald Bioventures, LLC, 555 Madison Avenue, Suite 11D
New York, NY, 10022
650-862-3029

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
04/07/2026

(Date of Event Which Requires Filing of This Statement)


If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).




schemaVersion:


SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D


Emerald Bioventures, LLC
Signature:/s/ Timothy Opler
Name/Title:Timothy Opler, Managing Member
Date:04/27/2026
Timothy Opler
Signature:/s/ Timothy Opler
Name/Title:Timothy Opler
Date:04/27/2026

FAQ

How much of Galera Therapeutics (GRTX) stock do Emerald Bioventures and Timothy Opler beneficially own?

Emerald Bioventures and Timothy Opler beneficially own 40,216,160 shares of Galera Therapeutics common stock, representing approximately 26.5% of the outstanding common shares. This ownership combines shares received in the Nova merger, the December 2024 private placement, and a partial mandatory conversion of Series B preferred stock.

How did Emerald Bioventures build its 26.5% stake in Galera Therapeutics (GRTX)?

Emerald’s stake comes from multiple steps: Series B Non-Voting Convertible Preferred Stock issued in the Nova Pharmaceuticals merger, 3,057,973 Galera common shares purchased for about $199,991 in a December 2024 private placement, and an April 7, 2026 mandatory conversion of 37,158.1873807108 Series B shares into 37,158,187 common shares.

What is the significance of the remaining Series B preferred stock held by Emerald in GRTX?

After the partial mandatory conversion, Emerald holds 20,813.8186192892 shares of Series B Preferred Stock. The filing notes these are excluded from beneficial ownership calculations because Emerald cannot acquire the underlying common shares without shareholder approval under the Certificate of Designation, limiting immediate further conversion.

How many Galera Therapeutics (GRTX) shares are assumed outstanding in Emerald’s 26.5% calculation?

The 26.5% figure assumes 151,941,554 Galera common shares outstanding. This total reflects 75,462,390 shares reported as outstanding as of March 16, 2026, plus 76,479,164 shares issued from conversion of 76,479.175 Series B Preferred shares on April 7, 2026, as described in referenced SEC reports.

What role does Emerald Bioventures play in Galera’s planned merger with Obsidian Therapeutics (GRTX)?

Emerald is a party to stockholder support agreements related to Galera’s Obsidian merger. Along with executive officers, directors and other stockholders, Emerald is part of a group holding about 51.1% of Galera’s outstanding capital stock that agreed to vote in favor of the mergers and related actions.

Did Emerald Bioventures receive registration rights for its Galera (GRTX) shares?

In connection with the December 2024 private placement, Emerald and other investors received registration rights. Galera agreed in a Registration Rights Agreement to file and seek effectiveness of a registration statement covering resale of the purchased common shares and common shares underlying pre-funded warrants, subject to defined deadlines and conditions.