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 Fortress Value Acquis V-CL A became 13F-reportable for the first time (one of 2 new listings in the book), a listing rather than a purchase; 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.
Top-heavy: concentrated book
Excluding Nextnav Inc (58% of the book), the rest is a 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
+2 sectors below the cut, 2% together
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 (an exit at the prior quarter-end), no cost basis
Other tracked managers holding the same core names as Fortress Investment Group LLC
| Manager / fund | Shared names | Their $ in those |
|---|---|---|
| Slotnik Capital, LLC | 14 / 32 | $258.5M |
| Twin Securities, Inc. | 7 / 32 | $153.2M |
| Beryl Capital Management LLC | 3 / 32 | $69.0M |
| Kryger Capital LLC | 7 / 32 | $948.7M |
| Birnam Oak Advisors, LP | 6 / 32 | $290.3M |
| Alpine Associates Management Inc. | 20 / 32 | $767.5M |
| Pentwater Capital Management LP | 13 / 32 | $7.8B |
| Decagon Asset Management LLP | 4 / 32 | $155.2M |
Ranked by the share of each fund's own book sitting in the names it shares with Fortress Investment Group LLC: only funds sharing at least a tenth of the book qualify. Index giants, bank custody books and market makers are excluded. They hold everything, so their overlap says nothing.
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% | →Listed Newly reportable | |
| 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% | →Listed Newly reportable | |
| 29 | Mara Holdings Inc COM | $115K | 14.1K | <0.1% | —Held | |
| 30 | Supercom Ltd New ORD SHS | $4K | 534 | <0.1% | —Held | |
| 31 | Servicetitan Inc SHS CL A | $2K | 28 | <0.1% | —Held | |
| 32 | Smartrent Inc COM CL A | $1K | 932 | <0.1% | —Held |
This fund page is the Follow view. The Build view lets your agent pull holdings, quarter changes, overlap, and source filings through API or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/1380393/holdings"
Use Arkolith to show Fortress Investment Group LLC's latest holdings, largest changes, and filing provenance.
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
Reported 13F total per quarter. Raw filing totals can include option notional.
Holdings from SEC EDGAR 13F-HR filings, updated quarterly, filed up to 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.