Form
SCHEDULE 13D/A
Active or control-oriented beneficial ownership filing.
Norbert W. Bischofberger - 20 Jun 2025 SCHEDULE 13D/A Report for Kronos Bio, Inc. Common Stock (KRON)
- Filing manager
- Norbert W. Bischofberger
- Reporting owner
- BISCHOFBERGER NORBERT W
- Security
- Kronos Bio, Inc. Common Stock
- Beneficially owned shares
- 0 shares
- Large-stake signal
-
Ownership
0%Beneficial ownership of this reported class.
Shares
0 sharesShares beneficially owned as disclosed.
Event date
20 Jun 2025Date tied to the ownership event or amendment.
Accepted by SEC
20 Jun 2025EDGAR acceptance date.
How to read this large-stake filing
- Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
- Compare this filing with the holder history and issuer page before treating the percentage as a current position.
- Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
- Class ownership
- 0%
- Symbol
- KRON
- SEC form
- SCHEDULE 13D/A
- Accepted by SEC
- 20 Jun 2025, 16:15:20 UTC
- Event date
- 20 Jun 2025
- Source filing
- View source filing
Ownership signal
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Subject security
Names, identifiers, and filing context for this profile.
1 source field
Source evidence
Original filing metadata and source links for verification.
4 source fields
Key filing fact
Norbert W. Bischofberger disclosed 0% ownership in Kronos Bio, Inc. Common Stock (KRON) on 20 Jun 2025.
Key facts
- Norbert W. Bischofberger filed SCHEDULE 13D/A for Kronos Bio, Inc. Common Stock (KRON).
- Disclosed ownership: 0%.
- Date of event: 20 Jun 2025.
Change
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 20 Jun 2025, 16:15.
Research use
- This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
- Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.
Evidence
Backed by Schedule 13D/13G
View source filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting persons
Disclosed reporting parties (6)
Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.
| Name | Ownership | Shares owned | Sole voting power | Shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| BISCHOFBERGER NORBERT W | 0% | 0 | 0 | 0 | /s/ Norbert Bischofberger, Ph.D. | Norbert Bischofberger, Ph.D. | 0001190273 |
| Norbert W. & Inger A. Bischofberger Revocable Inter Vivos Trust, dtd August 29, 1994 | 0% | 0 | 0 | 0 | /s/ Norbert Bischofberger, Ph.D. | Norbert Bischofberger, Ph.D., Trustee | |
| Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Exempt Trust dated April 29, 2020 | 0% | 0 | 0 | 0 | /s/ Norbert Bischofberger, Ph.D. | Norbert Bischofberger, Ph.D., Trustee | |
| Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the David Michael Anthony Dynasty GST Non-Exempt Trust dated April 29, 2020 | 0% | 0 | 0 | 0 | /s/ Norbert Bischofberger, Ph.D. | Norbert Bischofberger, Ph.D., Trustee | |
| Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Exempt Trust dated April 29, 2020 | 0% | 0 | 0 | 0 | /s/ Norbert Bischofberger, Ph.D. | Norbert Bischofberger, Ph.D., Trustee | |
| Norbert W. Bischofberger and Inger A. Bischofberger, Trustees of the Irene Alisha Bischofberger Dynasty GST Non-Exempt Trust dated April 29, 2020 | 0% | 0 | 0 | 0 | /s/ Norbert Bischofberger, Ph.D. | Norbert Bischofberger, Ph.D., Trustee |
CIK / CUSIP context first