Rye Brook Capital LLC — 13F Holdings & Portfolio
CIK 1844147 · latest 13F-HR filed 2026-10-07
Rye Brook Capital LLC manages $154.5M in 13F-reported U.S. long-equity assets across 40 reported positions as of its 2026-09-30 13F-HR filing. Its largest disclosed positions are QQQ (13.69%), SPROTT PHYSICAL URANIUM TR (9.66%), SMH (8.44%). Quarter over quarter (versus its 2026-06-30 filing) the fund opened 4 new positions and exited 4; 17 existing positions rose in reported value and 10 fell.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
Long-equity book
Distinct positions
Filed 2026-10-07
vs 2026-06-30
Portfolio charts
Latest quarter's book, what changed, and how the portfolio has evolved across filings.
Portfolio map
Q3 26Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.
Sector mix
% of 13F valueSectors from each company's SIC code; funds and ETFs grouped separately.
Biggest buys and sells
Q2 26 → Q3 26Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.
13F assets and positions
4 quartersTotal reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.
Top positions over time
reported valueThe eight largest current positions, valued at each quarter end.
Concentration
top 10 = 63.2%Cumulative share of the portfolio held in the largest N positions.
As of the firm’s regulatory filing dated Feb 3, 2026.
SUITE 300
GREENWICH, CT 06830
| Name | Title / Status | Ownership | Type |
|---|---|---|---|
| Ribeiro Fernandes, Carlos Gustavo Control | CHIEF COMPLIANCE OFFICER, MANAGING MEMBER since Mar 2017 | 75% or more | Individual |
Ownership & leadership changes · 1 filing with changes since May 11, 2017
From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.
- ChangedRibeiro Fernandes, Carlos Gustavo · title CEO → CHIEF COMPLIANCE OFFICER, MANAGING MEMBER
- ListedRibeiro Fernandes, Carlos Gustavo · CEO · 75% or more · control person
Quarter-over-quarter changes
Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.
Top Adds (vs prior quarter)
- GRAYSCALE ETHEREUM STAKING M$2.1M +71.1%
- SPDR GOLD SHARES$1.3M +28.2%
- ROUNDHILL MAGNIFICENT SEVEN$1.2M +64.9%
- ISHARES BITCOIN TRUST ETF$872.0K +48.3%
- AMAZON.COM INC$635.0K +16.9%
Top Trims
- INVESCO QQQ TRUST SERIES 1-$1.1M -5.1%
- VANECK SEMICONDUCTOR ETF-$802.0K -5.8%
- ST SR UTL SL SE SPDR ETF-USD-$586.0K -8.2%
- SS INDUSTRIAL SELECT SECTOR-$546.0K -6.4%
- ECHOSTAR CORP-A-$338.0K -16.2%
New Positions
- ROUNDHILL MEMORY ETF$2.5M
- CORGI LITHO & SEMICOND PHOTO$2.3M
- SPACE EXPLORATION TECHN-CL A$1.9M
- SPDR S&P BIOTECH ETF$205.0K
Exited Positions
- NOVO-NORDISK A/S-SPONS ADR$312.0K
- VANGUARD SHORT-TERM TREASURY$297.0K
- META PLATFORMS INC-CLASS A$239.0K
- MICROSOFT CORP$226.0K
Rye Brook Capital LLC Holdings (2026-09-30)
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | INVESCO QQQ TRUST SERIES 1 | QQQ | 46090E103 | $21.1M | 13.69% | 28,586 | SH |
| 2 | SPROTT PHYSICAL URANIUM TR | — | 85210A104 | $14.9M | 9.66% | 797,330 | SH |
| 3 | VANECK SEMICONDUCTOR ETF | SMH | 92189F676 | $13.0M | 8.44% | 21,419 | SH |
| 4 | SS INDUSTRIAL SELECT SECTOR | XLI | 81369Y704 | $7.9M | 5.14% | 47,500 | SH |
| 5 | VANECK PHARMACEUTICAL ETF | PPH | 92189F692 | $7.7M | 4.98% | 70,255 | SH |
| 6 | KRANESHARES CSI CHINA INTERN | KWEB | 500767306 | $7.6M | 4.90% | 308,635 | SH |
| 7 | NEXGEN ENERGY LTD | NXE | 65340P106 | $7.3M | 4.75% | 804,650 | SH |
| 8 | ST SR UTL SL SE SPDR ETF-USD | XLU | 81369Y886 | $6.5M | 4.23% | 165,720 | SH |
| 9 | SPDR GOLD SHARES | GLD | 78463V107 | $5.8M | 3.77% | 15,306 | SH |
| 10 | SS MATERIALS SELECT SECTOR | XLB | 81369Y100 | $5.7M | 3.67% | 116,485 | SH |
| 11 | GRAYSCALE ETHEREUM STAKING M | ETH | 38964R203 | $5.2M | 3.33% | 202,050 | SH |
| 12 | SS FINANCIAL SELECT SECTOR | XLF | 81369Y605 | $5.0M | 3.21% | 92,975 | SH |
| 13 | BLOOM ENERGY CORP- A | BE | 093712107 | $4.7M | 3.01% | 16,812 | SH |
| 14 | ST JOE CO/THE | JOE | 790148100 | $4.6M | 2.95% | 69,195 | SH |
| 15 | AMAZON.COM INC | AMZN | 023135106 | $4.4M | 2.85% | 17,669 | SH |
| 16 | FOUR CORNERS PROPERTY TRUST | FCPT | 35086T109 | $3.7M | 2.37% | 168,105 | SH |
| 17 | ROUNDHILL MAGNIFICENT SEVEN | MAGS | 53656G498 | $2.9M | 1.90% | 41,020 | SH |
| 18 | ISHARES BITCOIN TRUST ETF | IBIT | 46438F101 | $2.7M | 1.73% | 56,550 | SH |
| 19 | ROUNDHILL MEMORY ETF | DRAM | 77926X320 | $2.5M | 1.61% | 41,185 | SH |
| 20 | SOFTBANK GROUP CORP-UNSP ADR | SFTBF | 83404D109 | $2.5M | 1.60% | 123,220 | SH |
| 21 | SK TELECOM CO LTD-SPON ADR | SKM | 78440P306 | $2.4M | 1.58% | 69,700 | SH |
| 22 | CORGI LITHO & SEMICOND PHOTO | EUV | 218946663 | $2.3M | 1.49% | 91,255 | SH |
| 23 | SPACE EXPLORATION TECHN-CL A | SPCX | 84615Q103 | $1.9M | 1.21% | 12,400 | SH |
| 24 | ECHOSTAR CORP-A | ECHO | 278768106 | $1.7M | 1.13% | 19,516 | SH |
| 25 | SPROTT PHYSICAL COPPER TRUST | SCOP | 85210C100 | $1.6M | 1.01% | 127,645 | SH |
| 26 | ISHARES SILVER TRUST | SLV | 46428Q109 | $1.2M | 0.81% | 22,823 | SH |
| 27 | CEREBRAS SYSTEMS INC - A | CBRS | 15675D103 | $1.1M | 0.72% | 6,289 | SH |
| 28 | FIRST TRUST NASDAQ CYBERSECU | CIBR | 33734X846 | $979.0K | 0.63% | 9,500 | SH |
| 29 | AURA MINERALS INC | AUGO | G06973112 | $944.0K | 0.61% | 12,000 | SH |
| 30 | ERO COPPER CORP | ERO | 296006109 | $871.0K | 0.56% | 23,745 | SH |
| 31 | LYNAS RARE EARTHS LTD-SP ADR | LYSDY | 551073307 | $696.0K | 0.45% | 72,570 | SH |
| 32 | MP MATERIALS CORP | MP | 553368101 | $648.0K | 0.42% | 13,698 | SH |
| 33 | ENERGY FUELS INC | UUUU | 292671708 | $475.0K | 0.31% | 43,058 | SH |
| 34 | VANGUARD ULTRA SHRT TREASURY | VGUS | 922040852 | $368.0K | 0.24% | 4,860 | SH |
| 35 | ALPHABET INC-CL A | GOOGL | 02079K305 | $344.0K | 0.22% | 1,000 | SH |
| 36 | NVIDIA CORP | NVDA | 67066G104 | $320.0K | 0.21% | 1,400 | SH |
| 37 | GRAYSCALE SOLANA STAKING ETF | GSOL | 38965D104 | $254.0K | 0.16% | 28,650 | SH |
| 38 | SS SPDR S&P 500 ETF TRUST-US | SPY | 78462F103 | $240.0K | 0.16% | 315 | SH |
| 39 | SOLANA ETF | SOLZ | 92864M822 | $214.0K | 0.14% | 18,400 | SH |
| 40 | SPDR S&P BIOTECH ETF | XBI | 78464A870 | $205.0K | 0.13% | 1,300 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-09-30 | 2026-10-07 | $154.5M | 40 | 0001844147-26-000004 |
| 2026-06-30 | 2026-07-20 | $142.6M | 40 | 0001844147-26-000003 |
| 2026-03-31 | 2026-04-29 | $108.4M | 28 | 0001844147-26-000002 |
| 2025-12-31 | 2026-01-27 | $107.0M | 27 | 0001844147-26-000001 |
GREENWICH, CT 06830