As of November 6, 2026, 2 holders' latest Schedule 13D or 13G filings report owning 5% or more of Indigo Acquisition Corp. The largest reported stake is Indigo Sponsor Group LLC's, at 15%. 6 filings are on record since July 8, 2025 (Schedule 13D, August 5, 2025).
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Key facts
- · Holder: Bank of Montreal · Percent: 0% · SCHEDULE 13G/A
- · Holder: Bank of Montreal · Percent: 6.52% · SCHEDULE 13G/A
- · Holder: Harraden Circle Investments, LLC · Percent: 0% · SCHEDULE 13G/A
- · Holder: Wealthspring Capital LLC · Percent: 5.39% · SCHEDULE 13G
- · Holder: Indigo Sponsor Group LLC · Percent: 15% · SCHEDULE 13D
Indigo Acquisition Corp. has 6 Schedule 13D or 13G filings on record since 2025-07-08. 2 holders' latest filing reports 5% or more of ordinary shares. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| Indigo Sponsor Group LLC | 15% | 2,214,286 | SCHEDULE 13D, 2025-08-05 | 2025-06-30 |
| Wealthspring Capital LLC | 5.39% | 795,400 | SCHEDULE 13G, 2025-10-14 | 2025-09-30 |
| Harraden Circle Investments, LLC | 0% | 0 | SCHEDULE 13G/A, 2025-11-14 | 2025-09-30 |
| Bank of Montreal | 0% | 0 | SCHEDULE 13G/A, 2026-02-12 | 2025-12-31 |
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More on Indigo Acquisition Corp. and the records around it.
Companies that share a holder
- Wealthspring Capital LLC also filed stake reports on 17 other companies: Lionheart Holdings (Oct 2026), AmperCap Acquisition Company (Jul 2026), CENTURION ACQUISITION CORP (Jul 2026)
- Bank of Montreal also filed stake reports on 49 other companies: Akari Therapeutics Plc (Aug 2026), Alarm.com Holdings, Inc. (Aug 2026), North American Construction Group Ltd. (Aug 2026)
- Harraden Circle Investments, LLC also filed stake reports on 95 other companies: Calisa Acquisition Corp (Nov 2026), Texas Ventures Acquisition III Corp (Nov 2026), Columbus Acquisition Corp (Oct 2026)
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Purpose of Transaction (Item 4)
Indigo Sponsor Group LLC
On March 7, 2025, Sponsor, as sponsor of the Issuer, acquired an aggregate of 2,165,000 ordinary shares for an aggregate purchase price of $3,765, or approximately $0.002 per share. On July 2, 2025, the Issuer consummated its initial public offering (?IPO?) and in connection with the consummation, the Sponsor purchased an aggregate of 244,286 units for an aggregate purchase price of $2,442,860. Each unit purchased was comprised of one ordinary share of the Issuer and one right to receive one-tenth of one ordinary share of the Issuer upon consummation of an initial business combination. The reporting persons made the acquisitions reported in this Schedule 13D as sponsor and officers and directors of the Issuer and in support of the Issuer?s business plan. The reporting persons may acquire or dispose of additional securities or sell securities of the Issuer from time to time in the market or in private transactions, including as a result of ownership of the rights referred to above. However, reporting persons do not have any other agreements to acquire additional ordinary shares at this time. As officers and directors of the Issuer, Cassel and Salpeter are involved in making material business decisions regarding the Issuer?s policies and practices and may be involved in the consideration of various proposals considered by the Issuer?s board of directors. Additionally, as the Issuer?s business plan is to enter into a business combination, Cassel and Salpeter, as officers …The first part of Item 4 of the SCHEDULE 13D filed 2025-08-05; the filing has the rest
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-08 | Harraden Circle Investments, LLC | 7% | SCHEDULE 13G |
| 2025-08-05 | Indigo Sponsor Group LLC | 15% | SCHEDULE 13D |
| 2025-10-14 | Wealthspring Capital LLC | 5.39% | SCHEDULE 13G |
| 2025-11-14 | Harraden Circle Investments, LLC | 0% | SCHEDULE 13G/A |
| 2025-11-17 | Bank of Montreal | 6.52% | SCHEDULE 13G/A |
| 2026-02-12 | Bank of Montreal | 0% | SCHEDULE 13G/A |
Questions about who owns Indigo Acquisition Corp.
Who owns Indigo Acquisition Corp.?
On this page, 2 holders' latest ownership filings report 5% or more of Indigo Acquisition Corp.: Indigo Sponsor Group LLC (15%, Schedule 13D, filed 2025-08-05) and Wealthspring Capital LLC (5.39%, Schedule 13G, filed 2025-10-14).
Who are the largest shareholders of Indigo Acquisition Corp.?
By the share each holder's latest filing reports, the largest holders of Indigo Acquisition Corp. on this page are Indigo Sponsor Group LLC (15%) and Wealthspring Capital LLC (5.39%).
When did Indigo Sponsor Group LLC buy into Indigo Acquisition Corp.?
The filings give report dates, not purchase dates. The earliest filing from Indigo Sponsor Group LLC on this page is the Schedule 13D, filed 2025-08-05, reporting 15%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 6 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Indigo Acquisition Corp.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| July 1, 2025 | IPO filing, Form 424B4 | $10 a share | IPO filings | Source |
| June 23, 2025 | IPO filing, Form S-1/A | — | IPO filings | Source |
| June 12, 2025 | IPO filing, Form S-1 | — | IPO filings | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.