As of November 10, 2026, one holder's latest Schedule 13D or 13G filing report owning 5% or more of Newbury Street II Acquisition Corp. The largest reported stake is The K2 Principal Fund, L.P.'s, at 7.74%. 6 filings are on record since July 21, 2025 (Schedule 13G, November 9, 2026).
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Key facts
- · Reporting person: The K2 Principal Fund, L.P. · Sole voting: 0 · Shared voting: 241,100 · Sole dispositive: 0 · Shared dispositive: 241,100 · SCHEDULE 13G, 2026-11-09
- · Reporting person: Wolverine Asset Management, LLC · Sole voting: 0 · Shared voting: 15,023 · Sole dispositive: 0 · Shared dispositive: 15,023 · SCHEDULE 13G/A, 2026-10-06
- · Reporting person: The Goldman Sachs Group, Inc. · Sole voting: 0 · Shared voting: 736,806 · Sole dispositive: 0 · Shared dispositive: 736,806 · SCHEDULE 13G/A, 2026-08-13
- · Holder: The Goldman Sachs Group, Inc. · Percent: 5.2% · SCHEDULE 13G
- · Reporting person: Healthcare of Ontario Pension Plan Trust Fund · Sole voting: 200,000 · Shared voting: 0 · Sole dispositive: 200,000 · Shared dispositive: 0 · SCHEDULE 13G/A, 2025-08-13
Newbury Street II Acquisition Corp has 6 Schedule 13D or 13G filings on record since 2025-07-21. 1 holder's latest filing reports 5% or more of class a ordinary shares, par value $0.0001 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| The K2 Principal Fund, L.P. | 7.74% | 241,100 | SCHEDULE 13G, 2026-11-09 | 2026-11-04 |
| The Goldman Sachs Group, Inc. | 4.1% | 736,806 | SCHEDULE 13G/A, 2026-08-13 | 2026-06-30 |
| Healthcare of Ontario Pension Plan Trust Fund | 1.1% | 200,000 | SCHEDULE 13G/A, 2025-08-13 | 2025-06-30 |
| Wolverine Asset Management, LLC | 0.08% | 15,023 | SCHEDULE 13G/A, 2026-10-06 | 2026-09-30 |
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More on Newbury Street II Acquisition Corp and the records around it.
Newbury Street II Acquisition Corp elsewhere on the record
Companies that share a holder
- The K2 Principal Fund, L.P. also filed stake reports on 6 other companies: Quantum Leap Acquisition Corp (May 2026), Apogee Acquisition Corp (Apr 2026), Hennessy Capital Investment Corp. VII (Feb 2026)
- Healthcare of Ontario Pension Plan Trust Fund also filed stake reports on 27 other companies: Cambridge Acquisition Corp. (Aug 2026), General Purpose Acquisition Corp. (May 2026), Artius II Acquisition Inc. (Feb 2026)
- WOLVERINE ASSET MANAGEMENT LLC also filed stake reports on 75 other companies: Black Hawk Acquisition Corp (Nov 2026), AmperCap Acquisition Company (Oct 2026), BTC Development Corp. (Oct 2026)
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What the Full Report on Newbury Street II Acquisition Corp covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
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Warning Bells
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| The K2 Principal Fund, L.P. | 0 | 241,100 | 0 | 241,100 | SCHEDULE 13G, 2026-11-09 |
| K2 Genpar 2017 Inc. | 0 | 241,100 | 0 | 241,100 | SCHEDULE 13G, 2026-11-09 |
| Shawn Kimel Investments, Inc. | 0 | 241,100 | 0 | 241,100 | SCHEDULE 13G, 2026-11-09 |
| K2 & Associates Investment Management Inc. | 0 | 241,100 | 0 | 241,100 | SCHEDULE 13G, 2026-11-09 |
| The Goldman Sachs Group, Inc. | 0 | 736,806 | 0 | 736,806 | SCHEDULE 13G/A, 2026-08-13 |
| Goldman Sachs & Co. LLC | 0 | 736,806 | 0 | 736,806 | SCHEDULE 13G/A, 2026-08-13 |
| Healthcare of Ontario Pension Plan Trust Fund | 200,000 | 0 | 200,000 | 0 | SCHEDULE 13G/A, 2025-08-13 |
| Wolverine Asset Management, LLC | 0 | 15,023 | 0 | 15,023 | SCHEDULE 13G/A, 2026-10-06 |
| Wolverine Holdings, LLC | 0 | 15,023 | 0 | 15,023 | SCHEDULE 13G/A, 2026-10-06 |
| Christopher L. Gust | 0 | 15,023 | 0 | 15,023 | SCHEDULE 13G/A, 2026-10-06 |
| Robert R. Bellick | 0 | 15,023 | 0 | 15,023 | SCHEDULE 13G/A, 2026-10-06 |
The latest filing identifies Newbury Street II Acquisition Corp by CUSIP G6439S109 and gives its principal executive office as 121 High Street, Floor 3, Boston, MA 02110 (SCHEDULE 13G, 2026-11-09).
What the percentages are based on
WAM may be deemed the beneficial owner of 0.08% of the Issuer's outstanding Class A Ordinary Shares and each of Wolverine Holdings, Mr. Bellick, and Mr. Gust may be deemed the beneficial owner of 0.08% of the Issuer's outstanding Class A Ordinary Shares.Wolverine Asset Management, LLC, SCHEDULE 13G/A, 2026-10-06
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-21 | Wolverine Asset Management LLC | 5.02% | SCHEDULE 13G |
| 2025-08-13 | Healthcare of Ontario Pension Plan Trust Fund | 1.1% | SCHEDULE 13G/A |
| 2026-05-12 | The Goldman Sachs Group, Inc. | 5.2% | SCHEDULE 13G |
| 2026-08-13 | The Goldman Sachs Group, Inc. | 4.1% | SCHEDULE 13G/A |
| 2026-10-06 | Wolverine Asset Management, LLC | 0.08% | SCHEDULE 13G/A |
| 2026-11-09 | The K2 Principal Fund, L.P. | 7.74% | SCHEDULE 13G |
Questions about who owns Newbury Street II Acquisition Corp
Who owns Newbury Street II Acquisition Corp?
On this page, one holder's latest ownership filing reports 5% or more of Newbury Street II Acquisition Corp: The K2 Principal Fund, L.P. (7.74%, Schedule 13G, filed 2026-11-09).
When did The K2 Principal Fund, L.P. buy into Newbury Street II Acquisition Corp?
The filings give report dates, not purchase dates. The earliest filing from The K2 Principal Fund, L.P. on this page is the Schedule 13G, filed 2026-11-09, reporting 7.74%.
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 Newbury Street II Acquisition Corp
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| September 30, 2026 | Leadership change: William Z. Wyatt departs, Director | — | Leadership changes | Source |
| October 24, 2024 | IPO filing, Form S-1/A | — | IPO filings | Source |
| October 8, 2024 | IPO filing, Form S-1/A | — | IPO filings | Source |
| September 19, 2024 | IPO filing, Form S-1/A | — | IPO filings | Source |
| August 9, 2024 | 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.