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Codon Valuation

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Indicative US 409A and UK EMI share value estimates from cap table and financial inputs. Read-only.

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Last Tested
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Streamable HTTP · MCP 2025-11-25
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Available Tools

3 tools
estimate_409a_valueEstimate 409A common stock value
Read-onlyIdempotent
Inspect

Gives an indicative range for the fair market value per share of a US private company's common stock, as a planning estimate before a formal 409A valuation (for example, to anticipate an option strike price). Uses an option pricing model backsolve when there is a priced round in the last 12 months; otherwise a rolled-forward round, a sector revenue multiple, or an asset-based approach, depending on the inputs. Applies Finnerty and Chaffe marketability discounts. Inputs are numbers from the cap table and financials; no company or personal names are needed. Limitations: treats all preferred as non-participating and pari passu with 1:1 conversion, and does not model SAFEs or convertible notes. The result is not a 409A valuation.

ParametersJSON Schema
NameRequiredDescriptionDefault
cashNoCash on hand, in US dollars.
debtNoInterest-bearing debt, in US dollars.
sectorNoCompany sector. Sets the default volatility and revenue multiple. Use 'other' if unsure.
years_to_exitNoExpected years until a sale or IPO. Defaults to 3.
volatility_pctNoOptional override for equity volatility, as a percentage.
gross_margin_pctNoGross margin, as a percentage.
preferred_seriesNoEach priced preferred share round. Leave empty or omit if the company has never raised a priced round.
revenue_growth_pctNoYear-over-year revenue growth, as a percentage (for example 40 for 40%).
risk_free_rate_pctNoOptional current government bond yield matching years_to_exit, as a percentage.
options_outstandingNoNumber of share options granted and outstanding.
revenue_last_12_monthsNoRevenue for the last 12 months, in US dollars.
total_capital_investedNoTotal equity capital invested to date, in US dollars. Used when there is no priced round and no revenue.
common_shares_outstandingYesNumber of common shares issued and outstanding (excluding options and preferred).
has_participating_preferredNoTrue if any preferred series is participating.
performance_since_last_roundNoHow the company has performed against plan since its last priced round. Used when that round is more than 12 months old.
has_unconverted_safes_or_notesNoTrue if the company has SAFEs or convertible notes that have not yet converted.
options_weighted_average_strikeNoWeighted average exercise price of outstanding options, in US dollars.
estimate_emi_share_valueEstimate UK EMI ordinary share value
Read-onlyIdempotent
Inspect

Gives an indicative range for the market value per ordinary share of a UK private company, as a planning estimate before agreeing an EMI valuation with HMRC (for example, to anticipate an EMI option exercise price). Uses the same methods as the 409A estimate, in pounds sterling: an option pricing model backsolve for a priced round in the last 12 months, otherwise a rolled-forward round, a sector revenue multiple, or an asset-based approach. Inputs are numbers from the shareholder register and accounts; no company or personal names are needed. Limitations: treats all preference shares as non-participating and pari passu, and does not model convertible instruments. The result is not an HMRC-agreed valuation.

ParametersJSON Schema
NameRequiredDescriptionDefault
cashNoCash on hand, in pounds sterling.
debtNoInterest-bearing debt, in pounds sterling.
sectorNoCompany sector. Sets the default volatility and revenue multiple. Use 'other' if unsure.
years_to_exitNoExpected years until a sale or IPO. Defaults to 3.
volatility_pctNoOptional override for equity volatility, as a percentage.
gross_margin_pctNoGross margin, as a percentage.
preferred_seriesNoEach priced preferred share round. Leave empty or omit if the company has never raised a priced round.
revenue_growth_pctNoYear-over-year revenue growth, as a percentage (for example 40 for 40%).
risk_free_rate_pctNoOptional current government bond yield matching years_to_exit, as a percentage.
options_outstandingNoNumber of share options granted and outstanding.
revenue_last_12_monthsNoRevenue for the last 12 months, in pounds sterling.
total_capital_investedNoTotal equity capital invested to date, in pounds sterling. Used when there is no priced round and no revenue.
common_shares_outstandingYesNumber of ordinary shares issued and outstanding (excluding options and preferred).
has_participating_preferredNoTrue if any preferred series is participating.
performance_since_last_roundNoHow the company has performed against plan since its last priced round. Used when that round is more than 12 months old.
has_unconverted_safes_or_notesNoTrue if the company has SAFEs or convertible notes that have not yet converted.
options_weighted_average_strikeNoWeighted average exercise price of outstanding options, in pounds sterling.
get_formal_valuation_infoGet formal valuation requirements
Read-onlyIdempotent
Inspect

Lists the documents and typical steps for a formal US 409A valuation or UK EMI valuation, with contact details for Codon Valuation Advisors, the firm that provides this connector. Use when the user asks what a formal valuation requires or how to obtain one.

ParametersJSON Schema
NameRequiredDescriptionDefault
valuation_typeYesWhich formal valuation the user is asking about. Use 'both' for a company with US and UK option holders.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 3 tool updates
    • First observedestimate_409a_value
    • First observedestimate_emi_share_value
    • First observedget_formal_valuation_info

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