Fortress Investment Group LLC holds a concentrated book of 32 stocks worth $391.8M as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). This quarter they opened Masimo Corp. Their largest long position is Nextnav Inc at 58% of the equity book. They also disclosed $1.4M in put options (a bearish bet) and $591K in call options (bullish), shown separately below and excluded from the equity book.
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Use Arkolith to show Fortress Investment Group LLC's latest holdings, largest changes, and filing provenance.
Top-heavy: concentrated book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
90% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Nextnav Inc COMMON STOCK | $227.1M | 14.18M | 58.0% | —Held | |
| 2 | Ishares Bitcoin Trust ETF SHS BEN INT | $50.9M | 1.32M | 13.0% | —Held | |
| 3 | Playboy Inc COM | $25.2M | 16.59M | 6.4% | —Held | |
| 4 | First FNDTN Inc COM | $23.8M | 4.04M | 6.1% | —Held | |
| 5 | New Fortress Energy Inc COM CL A | $7.9M | 13.40M | 2.0% | —Held | |
| 6 | Masimo Corp COM | $6.4M | 35.9K | 1.6% | ▲New New position | |
| 7 | Chart Inds Inc COM | $4.9M | 23.7K | 1.3% | ▲+107% Added · +12K sh | |
| 8 | Penumbra Inc COM | $4.8M | 14.7K | 1.2% | ▲New New position | |
| 9 | Liberty Broadband Corp COM SER C | $4.2M | 84.1K | 1.1% | ▲+106% Added · +43K sh | |
| 10 | Amicus Therapeutic COM | $3.6M | 245.9K | 0.9% | ▲+124% Added · +136K sh | |
| 11 | Stellar Bancorp Inc COM | $3.3M | 89.2K | 0.8% | ▲New New position | |
| 12 | Warner Bros Discovery Inc COM SER A | $2.8M | 103.3K | 0.7% | ▲+182% Added · +67K sh | |
| 13 | Kenvue Inc COM | $2.8M | 163.0K | 0.7% | ▲New New position | |
| 14 | National Storage Affiliates COM SHS BEN IN | $2.6M | 68.8K | 0.7% | ▲New New position | |
| 15 | Electronic Arts Inc COM | $2.1M | 10.5K | 0.5% | ▲+86% Added · +5K sh | |
| 16 | Arcellx Inc COMMON STOCK | $2.1M | 18.2K | 0.5% | ▲New New position | |
| 17 | Webster Finl Corp COM | $2.0M | 29.5K | 0.5% | ▲New New position | |
| 18 | Fortress Value Acqu Corp V ORD SHS CL A | $2.0M | 200.0K | 0.5% | ▲New New position | |
| 19 | Tri Pointe Homes Inc COM | $1.9M | 39.9K | 0.5% | ▲New New position | |
| 20 | Norfolk Southn Corp COM | $1.8M | 6.2K | 0.5% | —Held | |
| 21 | CSG Sys Intl Inc COM | $1.8M | 22.3K | 0.5% | ▲New New position | |
| 22 | Apellis Pharmaceuticals Inc COM | $1.6M | 40.0K | 0.4% | ▲New New position | |
| 23 | Terns Pharmaceuticals Inc COM | $1.6M | 30.0K | 0.4% | ▲New New position | |
| 24 | Coterra Energy Inc COM | $1.4M | 40.0K | 0.4% | ▲New New position | |
| 25 | Silicon Laboratories Inc COM | $1.2M | 5.6K | 0.3% | ▲New New position | |
| 26 | Centessa Pharmaceuticals PLC SPONSORED ADS | $794K | 20.0K | 0.2% | ▲New New position | |
| 27 | Olaplex Hldgs Inc COM | $757K | 373.1K | 0.2% | ▲New New position | |
| 28 | Atrium Therapeutics Inc COM | $295K | 22.0K | 0.1% | ▲New New position | |
| 29 | Mara Holdings Inc COM | $115K | 14.1K | 0.0% | —Held | |
| 30 | Supercom Ltd New ORD SHS | $4K | 534 | 0.0% | —Held | |
| 31 | Servicetitan Inc SHS CL A | $2K | 28 | 0.0% | —Held | |
| 32 | Smartrent Inc COM CL A | $1K | 932 | 0.0% | —Held |
Put / call positions from the 13F — totals include every disclosed option leg
| Type | Underlying | Notional value | Underlying shares |
|---|---|---|---|
| PUT · bearish | WARNER BROS DISCOVERY INCWBD | $1.4M | 50K |
| CALL · bullish | CLEARWATER ANALYTICS HDS-ACWAN | $591K | 25K |
13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the equity book, weighting, concentration and sector figures above.
As-of date vs the date the SEC received each filing
Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.