# Route One Offshore Master Fund, L.P. — Form D/A

Route One Offshore Master Fund, L.P. of GRAND CAYMAN, E9, a pooled investment fund, filed a Form D amendment with the SEC on 2025-08-01. $387.7M was reported sold. Industry: Investing.

## Offering

- Filed: 2025-08-01
- Form: D/A
- Accession: 0000935836-25-000479
- Industry: Investing
- Exemptions: 06b, 3C, 3C.7
- Amount sold: $387.7M
- Minimum investment: $1K
- Investors: 10
- Date of first sale: 2011-02-01
- Security types: equity, fund interests
- Revenue range: Decline to Disclose
- SEC file number: 021-148769

## Issuer

- Name: Route One Offshore Master Fund, L.P.
- CIK: 0001502996
- Entity type: Limited Partnership
- Jurisdiction: CAYMAN ISLANDS
- Incorporated: 2010
- Address: C/O CITCO FUND SERVICES, 89 NEXUS WAY CAMANA BAY, GRAND CAYMAN, E9, KY1-1205
- Phone: (345) 949-3977

## Officers, directors & promoters (18)

| Name | Role | Location |
| --- | --- | --- |
| William F Duhamel | Executive Officer | San Francisco, CA |
| Weiyi (Kathy) H Huang | Executive Officer | San Francisco, CA |
| Zaeed H Kalsheker | Executive Officer | San Francisco, CA |
| Jason E Moment | Executive Officer | San Francisco, CA |
| Ashish H Pant | Executive Officer | New York, NY |
| N/A Route One Investment Company, LLC | Executive Officer | San Francisco, CA |
| Richard H Voon | Executive Officer | San Francisco, CA |
| N/A Route One Investment Company, LLC | Promoter | San Francisco, CA |
| William F Duhamel | Promoter | San Francisco, CA |
| Jason E Moment | Promoter | San Francisco, CA |
| Ashish H Pant | Promoter | New York, NY |
| Richard H Voon | Promoter | San Francisco, CA |
| Saskia H Mallach | Executive Officer | San Francisco, CA |
| Sean H Barron | Executive Officer | San Francisco, CA |
| Zaeed Kalsheker | Related Person | San Francisco, CA |
| William F. Duhamel | Related Person | San Francisco, CA |
| Jason E. Moment | Related Person | San Francisco, CA |
| Weiyi (Kathy) Huang | Related Person | San Francisco, CA |

## Other filings by this issuer (15)

| Filed | Form | Offering | Sold |
| --- | --- | --- | --- |
| [2026-07-21](https://search.stillhousedata.com/formd/0000935836-26-000362) | D/A | — | $1.0B |
| [2024-06-14](https://search.stillhousedata.com/formd/0000935836-24-000435) | D/A | — | $315.0M |
| [2023-07-06](https://search.stillhousedata.com/formd/0000935836-23-000500) | D/A | — | $215.2M |
| [2022-07-07](https://search.stillhousedata.com/formd/0000935836-22-000425) | D/A | — | $205.1M |
| [2021-07-21](https://search.stillhousedata.com/formd/0000935836-21-000434) | D/A | — | $205.1M |
| [2020-07-31](https://search.stillhousedata.com/formd/0000935836-20-000416) | D/A | — | $100.7M |
| [2019-08-07](https://search.stillhousedata.com/formd/0000935836-19-000419) | D/A | — | $99.8M |
| [2018-01-12](https://search.stillhousedata.com/formd/0000935836-18-000031) | D/A | — | $99.8M |
| [2017-01-11](https://search.stillhousedata.com/formd/0000935836-17-000028) | D/A | — | $99.8M |
| [2016-01-12](https://search.stillhousedata.com/formd/0000935836-16-000649) | D/A | — | $99.8M |
| [2015-01-13](https://search.stillhousedata.com/formd/0000935836-15-000037) | D/A | — | $99.8M |
| [2014-02-03](https://search.stillhousedata.com/formd/0000935836-14-000064) | D/A | — | $99.8M |
| [2013-01-11](https://search.stillhousedata.com/formd/0000935836-13-000041) | D/A | — | $97.8M |
| [2012-01-13](https://search.stillhousedata.com/formd/0001140361-12-002387) | D/A | — | $97.8M |
| [2010-10-08](https://search.stillhousedata.com/formd/0001140361-10-040566) | D | — | — |

## More

- [CIK 1502996 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1502996&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/formd/0000935836-25-000479.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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