Quick Takeaways
- JANE STREET GROUP, LLC filed SCHEDULE 13G/A for ALT5 Sigma Corp Common Stock, $0.001 par value per share (ALTS).
- Disclosed ownership: 2.8%.
- Date of event: 31 Dec 2025.
JANE STREET GROUP, LLC - 31 Dec 2025 SCHEDULE 13G/A Report for ALT5 Sigma Corp Common Stock, $0.001 par value per share (ALTS)
- Filing Manager
- JANE STREET GROUP, LLC
- Reporting Manager
- JANE STREET GROUP, LLC
- Symbol
- ALTS
- Shares outstanding
- 108,989,179 shares
- Disclosed Ownership
- 3,051,697 shares
- Ownership
- 2.8%
- Form type
- SCHEDULE 13G/A
- Filing time
- 02 Feb 2026, 16:14:59 UTC
- Date of event
- 31 Dec 2025
- Previous filing
- 13 Nov 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"JANE STREET GROUP, LLC disclosed 2.8% ownership in ALT5 Sigma Corp Common Stock, $0.001 par value per share (ALTS) on 31 Dec 2025."
What Changed
- Previous schedule filing date: 13 Nov 2025.
- Current filing was accepted on 02 Feb 2026, 16:14.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (4)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| JANE STREET GROUP, LLC | 2.8% | 3,051,697 | 0 | 3,051,697 | /s/ Jeremy Kahn | Jeremy Kahn (Authorized Signatory) | |
| Jane Street Capital, LLC | 0.8% | 880,187 | 0 | 880,187 | /s/ Jeremy Kahn | Jeremy Kahn (Authorized Signatory) | |
| Jane Street Options, LLC | 0.7% | 710,296 | 0 | 710,296 | /s/ Jeremy Kahn | Jeremy Kahn (Authorized Signatory) | |
| Jane Street Global Trading, LLC | 1.3% | 1,461,214 | 0 | 1,461,214 | /s/ Jeremy Kahn | Jeremy Kahn (Authorized Signatory) |