Janus Henderson Castor Master Fund Ltd.
Hedge FundFund ID 805-9847300806Cayman Islands
Gross assets
$655.6M
Min. investment
$100K
Beneficial owners
7
Size rank
Top 11%
Audited
Yes
Structure
Master
About this fund
Janus Henderson Castor Master Fund Ltd. is a hedge fund managed by Janus Henderson Investors US LLC. The fund reports $655.6 million in gross assets, placing it among the top 11% of private funds by size. The stated minimum investment is $100,000. Its financial statements are audited annually. Private funds are not required to publicly disclose returns; Form ADV reports assets, structure, and service providers, shown above.
Fund details
| Fund ID | 805-9847300806 |
| Fund type | Hedge Fund |
| 3(c)(1) exclusion | No |
| 3(c)(7) exclusion | Yes |
| Master fund | Yes |
| Feeder fund | No |
| Fund of funds | No |
| Relies on exemption from registration | No |
| Annual audit | Yes |
| Prepared per GAAP | Yes |
| Sub-advised | No |
| % of assets independently valued | 100% |
Other funds from this manager
| Fund | Type | Gross assets |
|---|---|---|
| Janus Henderson Biotech Innovation Master Fund Ltd. | Hedge | $6.06B |
| Janus Henderson Cash Liquidity Fund LLC | Liquidity | $2.74B |
| Janus Henderson Biotech Innovation Master Fund II Ltd. | Hedge | $1.2B |
See all 15 funds from this manager — unlock the full record.
Join to unlock · $37/moFrequently asked questions
How large is Janus Henderson Castor Master Fund Ltd.?
Janus Henderson Castor Master Fund Ltd. reports $655.6 million in gross assets, among the top 11% of private funds by size.
What is the minimum investment for Janus Henderson Castor Master Fund Ltd.?
The stated minimum investment is $100,000.
Who manages Janus Henderson Castor Master Fund Ltd.?
Janus Henderson Castor Master Fund Ltd. is managed by Janus Henderson Investors US LLC.
Does Janus Henderson Castor Master Fund Ltd. disclose returns?
No. Private funds are not required to publicly disclose performance. Form ADV reports assets, structure, and service providers.
Manager
J
Denver, CO
Service providers
Prime broker
Custodian
Administrator
Auditor
Marketer
Reported gross assets
$655.6M▲ 150%
Mar '25Form ADV, monthlyJun '26
How this fund compares
Gross assetsTop 11%
Larger than 89% of 67,041 private funds
Gross assets vs Hedge FundsTop 21%
Larger than 79% of 12,442 hedge funds
Minimum investmentTop 71%
Higher than 29% of funds reporting a minimum
Investor base
Adviser & related persons%
Funds of funds%
Non-U.S. persons1%
Share of the fund's beneficial ownership reported on Form ADV. Categories can overlap.