Valued at $5.0B at its Series C, Sep 2026. Nothing has traded since.
- ·Every dated print: 3 trades with prices and structures
- ·7 investment vehicles formed around Positron: sponsors, sizes, dates
- ·Direct lines for 5 people on the team
Membership and data by Private Market View
Valuation timeline
3 priced rounds · 32 daily marks since · Jul 2025 – Oct 2026Membership and data by Private Market View
Positron 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 | ▮ | ▮ |
Membership and data by Private Market View
Positron valuation
Positron was valued at $5 billion at its Series C in Sep 2026. That is the last priced event on record: no secondary trade or institutional fund mark has moved the figure since.
Recent activity
In the last 90 days, Positron's record added 1 funding round.
How much has Positron raised?
Positron has raised $514 million across 5 recorded rounds since 2023. The largest was an $875 million Series C in Sep 2026. 3 of the rounds disclosed a post-money valuation.
Positron has filed 2 Form Ds with the SEC since 2025, most recently in May 2026 ($234 million sold to 55 investors).
Positron secondary market activity
3 secondary trades in Positron shares are on record, between Feb 2026 and Jul 2026. 1 print landed in the last three months. Exact dates, prices and structures are available to Pro members.
Institutional holders and vehicles
In the last 12 months, 7 investment vehicles were formed to buy Positron shares, reporting $20.7 million sold to 214 investors across 7 sponsors, per SEC Form D filings (most recent Jun 2026).
Comparable companies
Comparable application specific semiconductors names by valuation on PrivateMarketView: Lightmatter ($4.6 billion), SiFive ($3.6 billion) and Tenstorrent ($3.2 billion).
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, the most current credible signal sets the number and the older ones confirm it: a live secondary-market price first, then three or more recent prints, then institutional fund marks, and otherwise the last priced round, which never decays. The valuation is the last round’s post-money moved by the price change since that round, so no share count is assumed. Today it is set by its last priced round. Question about this number? Full methodology →
Frequently asked about Positron
- What is Positron worth?
- Positron is valued at $5.0B as of Oct 2026. Valued at $5.0B at its Series C, Sep 2026. Nothing has traded since.
- 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.