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Metallobio

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Creating broad-spectrum antibiotics to reduce infections and address $3.03 billion markets

166%
 - 
Funded 26 May 2026
£240,001 target
£402,964 from 421 investors
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Business overview

Location Sheffield, United Kingdom
Social media
Website www.metallobio.com/
Sectors Healthcare Non-Digital B2B
Company number 13295116
Incorporation date 26 Mar 2021
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Investment summary

Type Equity
Valuation (pre-money) £4.6M
Equity offered 8.00%
Share price £3.94
UK tax relief

EIS

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Business highlights

  • Raised £1.269M in grants; £705k equity investment
  • Efficacy against THE 7 major bacterial pathogens
  • Patents in 24 countries, protecting the business
  • Antibacterial coatings licensing campaign started
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Key features

  • Secondary Market
  • Nominee investment min. £23.64 +
  • Pitch
  • Key Information
  • Team
  • Updates
  • Investors 421
  • Discussion
  • Documents

Pitch

About the Campaign

Infectious bacteria are resistant to existing antibiotics based on historically limited designs, affecting the safety of cancer treatment, routine surgery, and general health. Our science creates antibiotics that appear not to trigger bacterial resistance readily, addressing a key gap in the market.

Market Opportunity

The complicated urinary tract infections market will be worth $3 billion by 2035; the antimicrobial catheter coatings market, $2.56 billion by 2033. Active (UK, Italy) and planned (US, EU, Japan, Australia) guaranteed minimum revenue schemes promise income consolidation for new antibiotics.

Traction & Key Accomplishments

We have received 5 prestigious UK government grants (Innovate UK), created over 45 new antibacterial compounds, been awarded patents in 24 countries, and synthesised antibacterial materials that are up to 80,000 times more effective than marketed products. Underlying chemistry is industrial scale-up ready and protected with trade secrets, strengthening our commercial position. In 2023, MetalloBio won the Federation of Small Businesses Small Company of the Year award.

Use of Funds

Funds will allow us to establish safe dose levels for clinical studies; complete of key toxicology testing; develop clinical trial strategy with our regulatory experts; execute our coatings/materials licensing campaign; and submit new patent applications - all adding to the value of the company.

Key Information

Key information investment sheet

Key Investment Information Sheet is available by downloading the following documents:

  • Key Investment Information Sheet [Danish]
  • Key Investment Information Sheet [German]
  • Key Investment Information Sheet [English]
  • Key Investment Information Sheet [Spanish]
  • Key Investment Information Sheet [French]
  • Key Investment Information Sheet [Italian]
  • Key Investment Information Sheet [Dutch]
  • Key Investment Information Sheet [Portuguese]
  • Key Investment Information Sheet [Swedish]

IP Agreement

The company has entered into an exclusive IP licence agreement with the University of Sheffield relating to novel ruthenium-based compounds, including the Patents, the Know-how and the Data.

MetalloBio shares 10% of all sublicense income after it has received a cumulative total of £1,750,000 Sub-Licensing Income and is due to pay royalties of 1.5%, 3% or 4% of the Net Sales Value of all Licensed Therapeutic and Non-Therapeutic Products depending on patent status at the time of sales. The company also must pay a series of one-off payments Development Milestone Payments:
• £85,000 on Recruitment of the first patient to the first “first in man” (Phase I) trial for the first Licensed Therapeutic Product
• £150,000 on the recruitment of the first patient to the first randomised Phase II trial for the first Licensed Therapeutic Product
• £500,000 per event on the recruitment of the first patient to a Phase III trial for each Licensed Therapeutic Product and each indication thereof.
• £500,000 per event on grant of marketing approval for each Licensed Therapeutic Product and each indication thereof in each of the major markets
• £500,000 per event on the first sale of each Licensed Therapeutic Product and each indication thereof in each of the major markets.

The University of Sheffield may terminate the Agreement if the company or any sub-licensee materially breach the conditions of the Agreement. The university also has the termination right if an independent expert determines that the company has failed to comply with its obligations of using diligent efforts to develop, commercialise and maximise sales of the Licensed Products.

The IP can be assigned to MetalloBio once the company secures cumulatively £5 million in dilutive and non-dilutive funding and commercial income.

Outstanding Debt

The company has the following outstanding loans:

University of Sheffield IP Loan:
The original loan amount is £56,400.00 at an interest rate of 0.0% per annum. This debt relates to the reimbursement of historic patent costs and is not being repaid out of the funds raised on Republic Europe. The balance is fully repayable only upon the formal assignment of the Licensed IP to the company. While there is no standalone written loan document, the governing terms are covered by the IP Licence Agreement signed 27/05/2022 and a subsequent restatement agreement signed 14/08/2025.

Outstanding Convertible Loans

The company has the following outstanding convertible loans, which may convert to equity after this round and dilute existing shareholders:

1 - £40,713.00 loan from The University of Sheffield, with the following key terms:
• Interest rate: 6%
• Conversion trigger: Fundraising in aggregate in excess of £1,000,000, upon written request from the company,
• Conversion price: the lowest price per share paid by investors for the most senior class of shares issued in a Fundraising, less a discount of 20%,
• Valuation Cap: N/A
• Share class: Ordinary or the most senior share class if this carry greater rights
• Repayment date: July 2026

2 - £74,129.00 loan from The University of Sheffield, with the following key terms:
•Interest rate: 6%
• Conversion trigger: Fundraising in aggregate in excess of £1,000,000, upon written request from the company,
• Conversion price: the lowest price per share paid by investors for the most senior class of shares issued in a Fundraising less a discount of 20%,
• Valuation Cap: N/A
• Share class: Ordinary or the most senior share class if this carry greater rights
• Repayment date: August 2026.

3 - £137,702.00 loan from The University of Sheffield, with the following key terms:
• Interest rate: 6%
• Conversion trigger: Fundraising in aggregate in excess of £1,000,000, upon written request from the company,
• Conversion price: the lowest price per share paid by investors for the most senior class of shares issued in a Fundraising less a discount of 20%,
• Valuation Cap: N/A
• Share class: Ordinary or the most senior share class if this carry greater rights
•Repayment date: August 2026

Share Classes

Share classes
The company currently has 4 classes of shares: Ordinary, A Ordinary and B Ordinary and Deferred Shares. All investors in this round, including Republic Europe investors, will receive A Ordinary shares.

The rights attached to the share classes are as follows:

1 - Ordinary shares:
• Full dividend rights
• Voting rights
• In the event that the Sale Proceeds divided by the number of Equity Shares is the same or less than £3.477 per Equity Share: 0.1% of the Sale Proceeds to the Ordinary Shareholders pro rata to their respective holdings. Once the Ordinary A Shareholders have received their Priority Amount, any remainder of the Sale Proceeds will be distributed to the Ordinary Shareholders and the Ordinary B Shareholders on a pro rata basis.
• In the event that the Sale Proceeds divided by the number of Equity Shares exceeds £3.477 per Equity Share: pro rata

2 - A ordinary shares:
• Full dividend rights
• Voting rights
• In the event that the Sale Proceeds divided by the number of Equity Shares is the same or less than £3.477 per Equity Share: the Ordinary A Shareholders 99.9% of the Sale Proceeds pro rata to their respective holdings.
• In the event that the Sale Proceeds divided by the number of Equity Shares exceeds £3.477 per Equity Share: pro rata

3 - B ordinary shares
• Full dividend rights
• No voting rights
• On a winding-up event, receive one penny in aggregate for the entire class.
• In the event that the Sale Proceeds divided by the number of Equity Shares is the same or less than £3.477 per Equity Share: once the Ordinary A Shareholders have received their Priority Amount, any remainder of the Sale Proceeds will be distributed to the Ordinary Shareholders and the Ordinary B Shareholders on a pro rata basis.
• In the event that the Sale Proceeds divided by the number of Equity Shares exceeds £3.477 per Equity Share: pro rata capped at £1,095,255, which is the total B shares value at the current round share price (£3.477).

4 - Deferred shares
• No dividend rights
• No voting rights;
• On a winding up or Share Sale event, receive one penny in aggregate for the entire class.

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If you successfully purchase a share lot of this business, you will be granted access.

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If you successfully purchase a share lot of this business, you will be granted access.

Buy shares

Only shareholders can access this page

If you successfully purchase a share lot of this business, you will be granted access.

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Investing involves risks, including loss of capital, illiquidity, lack of dividends and dilution, and should be done only as part of a diversified portfolio. Please read the Risk Warnings before investing. Investments should only be made by investors who understand these risks. Tax treatment depends on individual circumstances and is subject to change in future.

This campaign for Metallobio has been approved by Seedrs Limited (trading as Republic Europe) ("Republic Europe", "us" or "we"), as of 9 March 2026 as a financial promotion. Republic Europe is authorised and regulated by the Financial Conduct Authority with firm reference number 550317. In approving this campaign, Republic Europe has concluded that the information, taken as a whole, is "fair, clear and not misleading." This means that for factual statements we have reviewed evidence of their accuracy, and that for aspirational statements we believe they are phrased appropriately in light of their speculative nature. You should note that in the case of factual statements, the evidence we review is provided by the business, and we do not audit it, which means that we may not be able to identify forged or altered evidence. You should further note that in the case of aspirational statements, the nature of the type of businesses presented on the Republic Europe platform is such that they are likely to have high ambitions, and we may approve statements that convey those ambitions even where we do not believe, or we do not have a view on whether it is likely, that they will be fully realised. The pre-money valuation and investment sought in the campaign are those set by the business: they are not reviewed or established by us, and the valuation is not an independent view of what the business is worth. Given the nature and type of businesses presented on the Republic Europe platform, it is possible that the business has very little cash remaining prior to receiving this investment, and the investment sought may be necessary for the business's on-going existence.

Republic Europe does not make investment recommendations to you. No communications from Republic Europe, through this website or any other medium, should be construed as an investment recommendation. Further, nothing on this website shall be considered an offer to sell, or a solicitation of an offer to buy, any security to any person in any jurisdiction to whom or in which such offer, solicitation or sale is unlawful. Republic Europe does not provide legal, financial or tax advice of any kind. If you have any questions with respect to legal, financial or tax matters relevant to your interactions with Republic Europe, you should consult a professional adviser.

Tax Relief (SEIS)

This business is eligible for SEIS relief - providing qualifying investors with income tax relief of 50% of their investment and certain other tax reliefs. Tax treatment depends on individual circumstances and is subject to change in future. Click to learn more.

Tax Relief (EIS)

This business is eligible for EIS relief - providing qualifying investors with income tax relief of 30% of their investment and certain other tax reliefs. Tax treatment depends on individual circumstances and is subject to change in future. Click to learn more.

Valuation (pre-money)

Valuation rounded from £4,588,996

This is the fully-diluted pre-money valuation of the business (i.e. before the new investment comes in and including issued options and other equity interests). In contrast, the post-money valuation is based on inclusion of the new investment in the value.

It is calculated as the pre-money valuation plus the amount of new investment. e.g. If Company A is ascribed a pre-money valuation of £1,200,000 by prospective investors investing £300,000, its post-money valuation is £1,500,000.

The investee business is responsible for setting its own valuation, it has not been prescribed by Republic Europe.

Pitch type

Investing in a regular equity campaign is the simplest and most common way to invest in a startup. You decide which business you want to invest in, and if the campaign hits its funding target then you will become one of their shareholders. As the company becomes more valuable, so do your shares; allowing you the opportunity to share in the future success of the business.

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Equity Offered

The equity offered is the percentage of the company’s shares being issued in return for the amount of investment raised.

When the amount raised is less than 100%, the equity offered is based on the target raise. Once the company has raised over 100% it is based on the total raised.

In some scenarios, entrepreneurs may accept additional direct investment after closing their Republic Europe campaign. Provided this is within 6 months of the closing and on the same terms, we do not typically offer pre-emption rights on that extra investment (where you have the opportunity to invest again to maintain your percentage shareholding).

Learn more about investing and pre-emption rights.

Nominee investment

This shows if you are able to choose, when making an investment, that you be represented by, and your shareholding be managed by, the Nominee investment.

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Custodian

If you invest in this Campaign, Republic Europe will act as Custodian rather than provide our standard nominee service. This is due to the fact that the business is not directly involved in the share sale and Republic Europe will not benefit from any rights under a shareholder agreement. As a result, Republic Europe will handle administrative tasks as we do normally, but you will not have information or voting rights, updates from the business, preemption on future fundraising, or ongoing support about business trading activity.

Learn more about Custodian here

Secondary market

This shows if the business has opted-in or opted-out of allowing its shares to be bought and sold on the secondary market.

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Direct investment

If available, this is an option to invest and hold shares 'directly' in the company (rather than via the Nominee investment). This option is only available to those investing over the threshold amount, which is determined by the fundraising company.

If you choose to hold your shares directly, you will be responsible for any contractual or administrative arrangements with the company you are investing in.

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Payment options

We are not able to accept card payments for investments into this sector. You can pay for your investment by creating a bank transfer, using funds in your investment account or create a Pay by Bank payment. Your investment will only be completed once the funds have reached our account.

Business Involvement

This Campaign offers shares for sale in business that is not directly involved in this Campaign or the sale. As a result, the Campaign and post-investment experience, including investor rights, will differ from a business-led campaign on Republic Europe. Most notably, the business will not engage with investors in the discussion forums both during and after the sale or provide any updates to investors.

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Payment options

We are not able to accept Pay by Bank payments for investments into this sector. You can pay for your investment with a card payment, by creating a bank transfer or by using funds in your investment account. Your investment will only be completed once the funds have reached our account.

Drawdowns

This campaign offers the ability to pay for an investment by drawdowns.

Security Token

A security token is a digital asset that represents ownership or other rights. It is a digital form of traditional investments. In the future, you may be able to trade your investment through compatible exchanges.

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