Mad River Investors
Asset Manager SEC-registered adviser
Legal name: Mrm-Horizon Advisors, LLC
Boston, MA Website
AUM
$403.5M
Regulatory AUM
Private funds
2
Hedge Fund 2
Private fund assets
$69.7M
Gross asset value
Employees
6
Last Form D raise
—
From SEC Form ADV filing (filed Jul 7, 2026). View on SEC
People(3)
Owners and executive officers named on the firm's SEC Form ADV.
R
S
S
Funds(2)
Private funds reported on Form ADV, with amounts raised from the funds' SEC Form D filings.
| Fund | Type | Gross assets | Raised (Form D) | Investors | Last Form D | Recency |
|---|---|---|---|---|---|---|
| Long Point Investors - Mad River Managed Series | Hedge Fund | $68.1M | — | — | — | |
| Long Point Investors Series C | Hedge Fund | $1.6M | — | — | — |
Board seats
Companies whose SEC Form D filings name one of this firm's people as a director, matched by name and office ZIP code.
No board seats matched from SEC filings yet.
Regulatory identifiers
- CRD number
- 130585
- SEC file number
- 801-62991
Sources
- SEC Form ADV Oct 14, 2026