ARCH Venture Partners X, LLC
Ten-percent owner · NMRA, PRME
As of 2026-09-16, ARCH Venture Partners X, LLC has 2 Form 4 transactions on record across 2 companies — 1 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2025-10-27 | NMRA | Purchase | 1,915,700 @ $2.61 | $5.0M | +46.4% of holding | 6,046,907 | Form 4 |
| 2025-08-01 | PRME | Purchase | 3,030,300 @ $3.30 | $10.0M | +94.7% of holding | 6,230,300 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.