Form
SCHEDULE 13D/A
Active or control-oriented beneficial ownership filing.
Topsoe Holding A/S - 14 Aug 2025 SCHEDULE 13D/A Report for IGM Biosciences, Inc. Common Stock, par value $0.01 per share (IGMS)
- Filing manager
- Topsoe Holding A/S
- Reporting owner
- Topsoe Holding A/S
- 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
14 Aug 2025Date tied to the ownership event or amendment.
Accepted by SEC
18 Aug 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
- IGMS
- SEC form
- SCHEDULE 13D/A
- Accepted by SEC
- 18 Aug 2025, 16:31:41 UTC
- Event date
- 14 Aug 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
Topsoe Holding A/S disclosed 0% ownership in IGM Biosciences, Inc. Common Stock, par value $0.01 per share (IGMS) on 14 Aug 2025.
Key facts
- Topsoe Holding A/S filed SCHEDULE 13D/A for IGM Biosciences, Inc. Common Stock, par value $0.01 per share (IGMS).
- Disclosed ownership: 0%.
- Date of event: 14 Aug 2025.
Change
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 18 Aug 2025, 16:31.
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 (7)
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 |
|---|---|---|---|---|---|---|---|
| Topsoe Holding A/S | 0% | 0 | 0 | 0 | By: /s/ Henrik Gaarn Bak | Henrik Gaarn Bak, Managing Director | 0001788357 |
| Jakob Haldor Topsoe | 0% | 0 | 0 | 0 | /s/ Jakob Haldor Topsoe | Jakob Haldor Topsoe | |
| Christina Teng Topsoe | 0% | 0 | 0 | 0 | /s/ Christina Teng Topsoe | Christina Teng Topsoe | |
| Anne Haugwitz-Hardenberg-Reventlow | 0% | 0 | 0 | 0 | /s/ Anne Haugwitz-Hardenberg-Reventlow | Anne Haugwitz-Hardenberg-Reventlow | |
| Emil Oigaard | 0% | 0 | 0 | 0 | /s/ Emil Oigaard | Emil Oigaard | |
| Thomas Schleicher | 0% | 0 | 0 | 0 | /s/ Thomas Schleicher | Thomas Schleicher | |
| Birgitte Nielsen | 0% | 0 | 0 | 0 | /s/ Birgitte Nielsen | Birgitte Nielsen |
CIK / CUSIP context first