Tucson, AZ · Founded 1989 · Privately Held (backing)
Developer of energy storage systems designed to address the future needs of the electric vehicle and aerospace markets today. Sion Power is based in Tucson, AZ and was founded in 1989. It was valued at $435 million at its later-stage round in Jan 2024, the last priced event on record. It has raised $145 million across 2 recorded rounds; the latest was a $240 million later-stage round in Nov 2021.
PMV mark · valuation
$435.0M
Oct 2026
Priced at
its later-stage round
Jan 2024
Total raised
$144.5M
Last round
Later Stage VC
Nov 2021
No prints on record
No secondary trades in Sion Power shares have been recorded yet. When market activity lands it appears here as monthly aggregates and, for platform-recorded trades, dated prints.
Pro members can request priority coverage with a 48-hour turnaround.
Free account
More of Sion Power with a free account
·The complete investor list: 11 names
·Watch Sion Power: the Monday email on marks, rounds and moves
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 Sion Power stock.
