This is a routine initial ownership filing with no trading activity. Monitor for the issuer's IPO pricing and subsequent insider trading filings (Form 4) for any material changes in ownership.
How the stock moved after the report
⚠ Clustered NEUTRAL VIEWSTOCK BELOW ENTRY AT T+1- T+0 · Oct 29 $14.89entry
- T+1 · 6d ago −12.42%α −11.95% · $13.04
- T+5 · due 11h ago Pending
- T+5 · todayOpen
- T+20 · in 22d Pending
- T+60 · in 3mo Pending
Price Chart
How similar events traded
Executive Summary
Form 3 initial beneficial ownership filings for Aspen Neuroscience, Inc. (ASPE) by ARCH Venture affiliates and four individual directors/officers. The filings disclose pre-IPO holdings of convertible preferred stock that automatically convert to common stock on a 1-for-9.8821 basis upon IPO completion. No shares were bought or sold; this is a routine initial statement of ownership.
Key Facts
- Filed by ARCH Venture Fund X, L.P., ARCH Venture Fund X Overage, L.P., ARCH Venture Partners X, L.P., ARCH Venture Partners X Overage, L.P., ARCH Venture Partners X, LLC, and individuals Keith Crandell, Robert Nelsen, Steven Gillis, and Kristina Burow.
- Holdings consist of Series Seed, Series A-1, Series A-2, Series B, and Series C Convertible Preferred Stock.
- Each share of preferred stock automatically converts on a 1-for-9.8821 basis into common stock upon completion of the issuer's IPO.
- No securities were bought or sold; this is an initial statement of beneficial ownership (Form 3).
- The filing is dated October 29, 2026, and the issuer's SEC file number is 001-43526.
Financial Impact
No financial impact; the filing discloses pre-existing ownership positions with no transaction.
Risk Factors
- No material risks identified from this filing alone.
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 3 Filing (Primary) | 0001193125-26-439136 |
| Document: 0001193125-26-439136-index.html | 0001193125-26-439136 |
| Document: 0001193125-26-439136.txt | 0001193125-26-439136 |
Track record builds as more directional reports settle.
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Nov 3, 2026 2d ago | SC 13G | $12.29 $12.76 | ▲ +3.82% | ▲ +2.17% | $11.76 (−4.31%) |
Nov 2, 2026 2d ago | Insider Cluster | $12.29 $12.76 | ▲ +3.82% | ▲ +2.17% | $11.76 (−4.31%) |
Nov 2, 2026 2d ago | Insider Cluster | $12.29 $12.76 | ▲ +3.82% | ▲ +2.17% | $11.76 (−4.31%) |
Nov 2, 2026 3d ago | 8-K | $12.29 $12.76 | ▲ +3.82% | ▲ +2.17% | $11.76 (−4.31%) |
Oct 30, 2026 6d ago | 424B4 | $13.04 $12.29 | ▼ −5.75% | ▼ −6.05% | $11.76 (−9.82%) |
Oct 30, 2026 6d ago | EFFECT | $14.89 $13.04 | ▼ −12.42% | ▼ −11.95% | $11.76 (−21.02%) |
Oct 29, 2026 6d ago | Press Release | $14.89 $13.04 | ▼ −12.42% | ▼ −11.95% | $11.76 (−21.02%) |
Oct 29, 2026 6d ago | 3 | $14.89 $13.04 | ▼ −12.42% | ▼ −11.95% | $11.76 (−21.02%) |
Oct 29, 2026 6d ago | 3 | $14.89 $13.04 | ▼ −12.42% | ▼ −11.95% | $11.76 (−21.02%) |
Oct 29, 2026 6d ago | 3 | $14.89 $13.04 | ▼ −12.42% | ▼ −11.95% | $11.76 (−21.02%) |
US Market Status
Subscribe to SecBot
Get Real-Time SEC Filing Intelligence
Comprehensive SEC filing analysis delivered the moment filings hit EDGAR. Sentiment scoring, impact analysis, and actionable insights for every material event.
Create a free account Live analysis, Telegram alerts, watchlists and the MCP server for subscribers