What is Positron worth?
$4.4Bimplied by the PA Mark · Sep 2026
Positron last raised $875.0M in its Series C (Sep 2026).
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- ·Post-money valuations for all 5 rounds
- ·The complete investor list — 31 names
- ·Watchlist + deal alerts for Positron
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Valuation timeline
4 marks · Jul 2025 – Sep 2026▮▮
Early Stage VC (Series A1)2 roundsPA Mark
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Funding history
5 rounds| Date | Round | Raised | Post-money | $/share |
|---|---|---|---|---|
| Sep 2026 | Series C | $875.0M | ▮ | ▮ |
| May 2026 | Early Stage VC (Series B) | $233.9M | ▮ | ▮ |
| Jul 2025 | Early Stage VC (Series A1) | $75.1M | ▮ | ▮ |
| Feb 2025 | Venture Round | $23.5M | ▮ | ▮ |
| Oct 2023 | Seed Round | $5.0M | ▮ | ▮ |
How Positron's valuation is determined
Private company valuations aren’t quoted on an exchange — they’re established in moments: a priced funding round sets a post-money valuation, secondary trades print at a price per share, and SEC-registered funds holding the stock report fair-value marks in their N-PORT filings.
For Positron, we compose those signals into the PA Mark — a weighted composite of 4 recent pricing inputs, decayed by age and reset on new rounds. The implied valuation multiplies the mark by shares outstanding. Full methodology →
Frequently asked
- What is Positron worth?
- Positron's implied valuation is $4.4B, based on the PA Mark composite price of about $80 per share as of Sep 2026.
- How much has Positron raised?
- Positron has raised $514.0M in total funding across 5 recorded rounds.
- When did Positron last raise?
- Positron last raised in Sep 2026 (Series C), raising $875.0M.