Heirloom

Brisbane, CA · Founded 2020 · Privately Held (backing)

Developer of a carbon capture and utilization technology designed to enhance the natural process of carbon dioxide absorption from the atmosphere. Heirloom is based in Brisbane, CA and was founded in 2020. Its last reported valuation was $253 million in Jan 2022. It has raised $57.6 million.

Last reported valuation
$253.0M
Oct 2026
Priced at
—
Total raised
$57.6M
Last round
—
No prints on record

No secondary trades in Heirloom shares have been recorded yet. When market activity lands it appears here as monthly aggregates and, for platform-recorded trades, dated prints.

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Where Heirloom prices come from

Secondary marks are indicative month-end price levels observed across secondary-market trading venues — a level, not a trade — and are the market input to the PrivateMarketView mark. Private share prices aren’t published anywhere. Aggregate figures combine multiple reporting channels — direct participant reports, platform transactions, third-party market intelligence — at monthly granularity. Individually dated prints are a Pro feature and are shown only for transactions recorded on our own platform. Third-party-reported trades are never republished individually, at any tier. Verified prints (✓) have been confirmed against a second source. Prints marked SPV or Forward reflect the structure’s pricing, which can differ from direct share transfers of Heirloom stock.