Skip to content
Net flow Fri 30 Oct:−$815.8MCumulative:+$73.7BNAV:$116.6BCEFI:25 · FearBTC holders vs entry Sun 1 Nov:−2.8%Funds:58Assets:16
data for Fri 30 Oct · published Sat 31 Oct 05:48 UTC · T+1
Net flow Fri 30 Oct−$815.8MCumulative+$73.7BCEFI25Fear
App

Mad River Investors

Other managers our classification, preliminary

Generated from SEC records

Investment manager in Boston, filing as MAD RIVER INVESTORS. Its 13F lists 30 positions; crypto ETFs make up 8.2% of the reported value.

Legal name (SEC)
MAD RIVER INVESTORS
Headquarters
84 State Street, Suite 1060, Boston, MA 02109
Incorporated
Delaware
Former names
MRM-Horizon Advisors LLC
SEC filer ID (CIK)
1384484

Sources: SEC EDGAR (company record and the Q2 2026 13F). No Wikidata entry.

Crypto ETF holdings

Only US spot crypto ETFs from this 13F, not the whole portfolio.

13F filings for the quarter ended Jun 30, 2026 · next update after Nov 14, 2026 · What is a 13F?

Crypto ETF value$22.1MJun 30, 2026
Funds held3BTC
Change in shares, q/q0unchanged
Holding sinceQ1 2410 quarters in a row

Value across crypto ETFs by quarter

US$, at each quarter-end price; it moves with the coin, shares tell the buying.

Q1 24: $30.5MQ1 24Q2 24: $20.7MQ2 24Q3 24: $26.4MQ3 24Q4 24: $38.1MQ4 24Q1 25: $32.5MQ1 25Q2 25: $42.2MQ2 25Q3 25: $43.7M$43.7MQ3 25Q4 25: $33.0MQ4 25Q1 26: $25.6MQ1 26Q2 26: $22.1M$22.1MQ2 26
Q1 24: $30.5MQ1 24Q2 24: $20.7MQ3 24: $26.4MQ4 24: $38.1MQ4 24Q1 25: $32.5MQ2 25: $42.2MQ3 25: $43.7M$43.7MQ3 25Q4 25: $33.0MQ1 26: $25.6MQ2 26: $22.1M$22.1MQ2 26

Positions on Jun 30, 2026

3 funds · “largest holder” = biggest position among all 13F filers in that fund

FundAssetValueOf its crypto ETFsOf the fund's 13F valueChange in shares, q/q
GBTCBitcoin$16.4M74.2%1.3%unchanged
FBTCBitcoin$3.6M16.3%0.2%unchanged
BTCBitcoin$2.1M9.5%0.2%unchanged

Timeline

  1. Q1 24First crypto ETF position on record: $30.5M, GBTC, FBTC.
  2. Q3 24Entered BTC.
  3. Q3 25Peak value: $43.7M across crypto ETFs.
  4. Q2 26Holds 3 funds worth $22.1M.

This page shows only crypto ETFs from this manager's 13F, not its whole portfolio. Open this 13F filing on sec.gov