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Omega Fund (IMA) discloses 8.4% ImageneBio ownership built via PIPE deals

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

Rhea-AI Filing Summary

Omega Fund VI and related reporting persons have disclosed a significant ownership position in ImageneBio, Inc. common stock. They report beneficial ownership of 936,222 shares, including 480,861 shares underlying pre-funded warrants held by Omega Fund, representing 8.4% of the company’s common stock.

The stake was built through ImageneBio’s (formerly Ikena Oncology) IPO, a 2025 PIPE financing and a 2026 PIPE financing. In 2026, Omega Fund bought pre-funded warrants for 480,861 shares at $5.199 per warrant share for total consideration of $2,499,996, as part of a broader $30 million pre-funded warrant issuance.

The warrants have a $0.001 exercise price, are exercisable at any time and do not expire, but contain a beneficial ownership limitation capped at 19.99%. The reporting persons describe the holding as an investment and indicate they may discuss strategic, governance, or transactional matters with ImageneBio’s board and other stockholders while reserving flexibility to increase or reduce their position.

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Insights

Omega Fund discloses an 8.4% ImageneBio stake built via IPO and PIPE deals.

The filing shows Omega Fund VI and affiliates owning 936,222 ImageneBio shares, or 8.4% of the common stock. This includes 480,861 shares underlying pre-funded warrants acquired for $2,499,996 in the 2026 PIPE, plus earlier IPO and 2025 PIPE shares.

The 2026 PIPE issued pre-funded warrants for up to 5,770,335 shares at $5.199 per share, raising about $30 million. The warrants carry a nominal $0.001 exercise price and a 19.99% beneficial ownership cap, shaping how quickly large holders can exercise without crossing that threshold.

The reporting persons describe the position as an investment but outline a wide range of possible future actions, from additional share purchases or sales to potential involvement in strategic or governance changes. Actual impact depends on future decisions and market conditions, which are not specified in this disclosure.

Beneficial ownership 936,222 shares Total shares beneficially owned by reporting persons
Ownership percentage 8.4% Portion of ImageneBio common stock beneficially owned
Shares outstanding baseline 10,654,281 shares Common shares outstanding as of March 2, 2026
Pre-funded warrant shares (Omega Fund) 480,861 shares Warrant shares counted in Omega Fund’s beneficial ownership
Omega Fund 2026 PIPE investment $2,499,996 Consideration for 480,861 pre-funded warrant shares
2026 PIPE gross proceeds $30 million Company proceeds from issuing pre-funded warrants for 5,770,335 shares
2026 PIPE warrant price $5.199 per warrant share Purchase price for pre-funded warrants
Warrant exercise price $0.001 per share Exercise price of pre-funded warrants
Schedule 13D regulatory
"If the filing person has previously filed a statement on Schedule 13G to report the acquisition"
A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.
pre-funded warrants financial
"the Issuer agreed to sell and issue pre-funded warrants to purchase shares of Common Stock"
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.
PIPE Financing financial
"the 2025 PIPE Financing and the 2026 PIPE Financing"
Pipe financing is a way for companies to raise money quickly by selling new shares or bonds directly to investors, often before their stock is publicly traded or in the early stages of a project. It’s similar to a company securing a loan from investors, providing quick capital needed for growth or operations. For investors, it can offer opportunities for early involvement and potentially higher returns, but it may also carry increased risk due to the immediate nature of the deal.
Registration Rights Agreement regulatory
"the Issuer entered into a registration rights agreement (the "2025 Registration Rights Agreement")"
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.
reverse stock split financial
"the Issuer effected a 1-for-12 reverse stock split of its common stock"
A reverse stock split is when a company reduces the number of its shares outstanding, making each share more valuable. For example, if you own 100 shares worth $1 each, a 1-for-10 reverse split would turn your 100 shares into 10 shares worth $10 each. Companies often do this to boost their stock price and appear more stable to investors.
beneficial ownership limitation financial
"would exceed a specified beneficial ownership limitation, not to exceed 19.99%"
A beneficial ownership limitation is a rule that caps the percentage of a company’s shares an investor can be treated as owning or controlling for voting, regulatory or tax purposes. It matters to investors because it can restrict how many shares a person or group can buy or vote, affect takeover chances, and influence share liquidity and value — like a speed limit that prevents any single driver from taking over the whole road.





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).




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Omega Fund VI, L.P.
Signature:/s/ Otello Stampacchia
Name/Title:Otello Stampacchia, Director of General Partner of General Partner
Date:04/21/2026
Omega Fund VI GP, L.P.
Signature:/s/ Otello Stampacchia
Name/Title:Otello Stampacchia, Director of General Partner
Date:04/21/2026
Omega Fund VI GP Manager, Ltd.
Signature:/s/ Otello Stampacchia
Name/Title:Otello Stampacchia, Director
Date:04/21/2026
Claudio Nessi
Signature:/s/ Otello Stampacchia
Name/Title:Otello Stampacchia, Attorney-in-Fact
Date:04/21/2026
Otello Stampacchia
Signature:/s/ Otello Stampacchia
Name/Title:Otello Stampacchia
Date:04/21/2026

FAQ

What ownership stake in ImageneBio (IMA) does Omega Fund report?

Omega Fund and related reporting persons report beneficial ownership of 936,222 ImageneBio common shares, representing 8.4% of the company. This percentage is calculated using 10,654,281 shares outstanding as of March 2, 2026, plus 480,861 warrant shares treated as converted under Rule 13d-3.

How did Omega Fund build its ImageneBio (IMA) position over time?

Omega Fund’s position originated from Ikena’s IPO, when preferred shares converted into common and additional IPO shares were purchased. It later added 267,556 shares in a 2025 PIPE financing and 480,861 warrant shares in a 2026 PIPE, creating today’s 8.4% beneficial ownership stake.

What are the key terms of the 2026 PIPE financing for ImageneBio (IMA)?

In the 2026 PIPE, ImageneBio agreed to sell pre-funded warrants for up to 5,770,335 shares at $5.199 per warrant share, for about $30 million gross proceeds. The warrants have a $0.001 exercise price, are exercisable any time, and can be exercised on a cashless basis.

How many pre-funded warrants did Omega Fund buy in ImageneBio (IMA)?

Omega Fund acquired pre-funded warrants to purchase up to 480,861 ImageneBio common shares in the 2026 PIPE. It paid aggregate consideration of $2,499,996, funded from working capital, and these warrant shares are included in the 8.4% beneficial ownership disclosed in the filing.

Is there a beneficial ownership limit on Omega Fund’s ImageneBio (IMA) warrants?

Yes. The pre-funded warrants include a beneficial ownership limitation that prevents exercise if the holder’s post-exercise ownership would exceed a specified cap, not to exceed 19.99%. This limits how many warrant shares Omega Fund and other investors can convert at one time.

What future actions do Omega Fund and affiliates contemplate regarding ImageneBio (IMA)?

The reporting persons say they acquired ImageneBio shares as an investment but may buy or sell additional securities and discuss strategy, governance, or transactions with management, the board, or stockholders. They outline possible corporate actions but state they currently have no specific plans beyond those described.