October Effect Ltd holds a diversified book of 64 stocks worth $106.3M as of Q2 2026 (disclosed Jul 21, 2026, a ~45-day 13F lag). This quarter they opened Intel Corp and trimmed Nvidia Corp. Their largest long position is Western Digital Corp at 8% of the equity book. Cloning the disclosed picks since 2025 would be +17% (+18.5%/yr). That is a simulation of the disclosed long book, not audited returns.
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curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/funds/2078353/holdings"
Use Arkolith to show October Effect Ltd's latest holdings, largest changes, and filing provenance.
Following at the filing date actually beat the quarter-end book by 3.8 points over this window.
Growth of $10,000 cloning October Effect Ltd's disclosed long 13F book, rebalanced on each filing date (so it reflects the ~45-day reporting lag, no look-ahead), total-return basis (dividends reinvested), derived from end-of-day prices. “Their reported book” values the same picks from quarter-end, before they were public. S&P 500 is SPY total return over the same window. Excludes shorts, cash, options and non-13F holdings. Not investment advice.
Top-heavy: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
64% 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 | Western Digital Corp COM | $8.0M | 12.6K | 7.6% | ▲+277% Added · +9K sh | |
| 2 | Nvidia Corporation COM | $7.4M | 36.8K | 6.9% | ▼−34% Reduced · −19K sh | |
| 3 | Intel Corp COM | $5.2M | 36.9K | 4.9% | ▲New New position | |
| 4 | Reddit Inc CL A | $4.9M | 28.0K | 4.6% | ▲New New position | |
| 5 | Advanced Micro Devices Inc COM | $4.2M | 7.2K | 3.9% | —Held | |
| 6 | Ge Aerospace COM NEW | $4.1M | 11.1K | 3.9% | ▲+12% Added · +1K sh | |
| 7 | SPDR Series Trust ST STR BLO 1 ETF | $3.9M | 43.1K | 3.7% | ▼−6.4% Reduced · −3K sh | |
| 8 | Meta Platforms Inc CL A | $3.9M | 6.9K | 3.7% | ▼−0.6% Reduced · −40 sh | |
| 9 | Applied Optoelectronics Inc COM | $3.7M | 25.2K | 3.5% | ▲New New position | |
| 10 | Applied Matls Inc COM | $3.4M | 4.8K | 3.2% | ▲New New position | |
| 11 | Oracle Corp COM | $3.2M | 21.7K | 3.0% | ▲New New position | |
| 12 | Direxion Shares ETF Trust DAI SEM BUL ETF | $3.1M | 11.6K | 2.9% | ▼−81% Reduced · −49K sh | |
| 13 | State STR SPDR S&P 500 ETF T TR UNIT | $3.1M | 4.1K | 2.9% | ▲+11% Added · +400 sh | |
| 14 | Alphabet Inc CAP STK CL A | $2.9M | 8.1K | 2.7% | ▲+53% Added · +3K sh | |
| 15 | SPDR Series Trust ST STR P500ETF | $2.5M | 28.1K | 2.3% | ▼−4.0% Reduced · −1K sh | |
| 16 | Sprott Asset Management LP PHYSICAL SILVER | $2.5M | 130.0K | 2.3% | ▼−28% Reduced · −51K sh | |
| 17 | Innovator Etfs Trust NASDAQ 100 MANA | $2.4M | 66.3K | 2.3% | ▼−0.9% Reduced · −600 sh | |
| 18 | Lumen Technologies Inc COM | $2.1M | 276.3K | 2.0% | ▲+68% Added · +112K sh | |
| 19 | Ssga Active TR STATE STREET US | $2.0M | 31.0K | 1.9% | ▲+17% Added · +5K sh | |
| 20 | SPDR Series Trust ST INTER ETF | $1.9M | 67.7K | 1.8% | ▼−3.4% Reduced · −2K sh | |
| 21 | Ishares TR RUS 1000 GRW ETF | $1.9M | 15.5K | 1.8% | ▲+281% Added · +11K sh | |
| 22 | Micron Technology Inc COM | $1.8M | 1.5K | 1.7% | ▲New New position | |
| 23 | Fidelity Covington Trust BLUE CHIP GRWTH | $1.8M | 28.2K | 1.6% | ▲+3.3% Added · +910 sh | |
| 24 | Ishares TR CORE US AGGBD ET | $1.6M | 16.2K | 1.5% | ▼−4.8% Reduced · −816 sh | |
| 25 | SPDR Index SHS FDS ST STR PO EX ETF | $1.5M | 29.3K | 1.4% | ▲+14% Added · +4K sh | |
| 26 | SPDR Index SHS FDS ST PORT MARK ETF | $1.5M | 28.3K | 1.4% | ▲+18% Added · +4K sh | |
| 27 | Amazon Com Inc COM | $1.4M | 5.9K | 1.3% | ▼−52% Reduced · −6K sh | |
| 28 | Proshares TR ULTRAPRO QQQ | $1.3M | 15.9K | 1.2% | ▼−71% Reduced · −39K sh | |
| 29 | Space Exploration Techn Corp CLASS A COM STK | $1.1M | 6.5K | 1.0% | ▲New New position | |
| 30 | Nebius Group N.V. SHS CLASS A | $1.1M | 3.9K | 1.0% | ▲New New position | |
| 31 | Vanguard World FD INF TECH ETF | $951K | 8.0K | 0.9% | ▲+678% Added · +7K sh | |
| 32 | Tesla Inc COM | $946K | 2.2K | 0.9% | ▼−32% Reduced · −1K sh | |
| 33 | NEOS ETF Trust NASDAQ 100 HIGH | $881K | 15.5K | 0.8% | ▲+11% Added · +2K sh | |
| 34 | Gilead Sciences Inc COM | $870K | 6.9K | 0.8% | ▼−1.4% Reduced · −100 sh | |
| 35 | Ishares TR MSCI ACWI EX US | $745K | 9.8K | 0.7% | ▼−2.4% Reduced · −240 sh | |
| 36 | SPDR Series Trust ST STR SP600 SML | $712K | 12.3K | 0.7% | ▲+14% Added · +1K sh | |
| 37 | Ishares TR RUS MD CP GR ETF | $709K | 4.8K | 0.7% | ▼−4.3% Reduced · −220 sh | |
| 38 | Fifth Third Bancorp COM | $704K | 12.5K | 0.7% | ▼−13% Reduced · −2K sh | |
| 39 | SPDR Series Trust ST STR SP AERO | $694K | 2.4K | 0.7% | —Held | |
| 40 | Magnolia Oil & Gas Corp CL A | $665K | 26.0K | 0.6% | ▼−56% Reduced · −33K sh | |
| 41 | Altria Group Inc COM | $660K | 9.2K | 0.6% | ▼−1.1% Reduced · −100 sh | |
| 42 | Lockheed Martin Corp COM | $616K | 1.2K | 0.6% | ▼−0.2% Reduced · −2 sh | |
| 43 | Netflix Inc. COM | $596K | 8.3K | 0.6% | —Held | |
| 44 | Sprouts FMRS MKT Inc COM | $575K | 6.8K | 0.5% | ▼−36% Reduced · −4K sh | |
| 45 | Innovator Etfs Trust U S EQ 10 BUFFER | $563K | 16.6K | 0.5% | ▼−38% Reduced · −10K sh | |
| 46 | Rackspace Technology Inc COM | $527K | 80.8K | 0.5% | ▲New New position | |
| 47 | Pepsico Inc COM | $516K | 3.8K | 0.5% | —Held | |
| 48 | Apple Inc COM | $508K | 1.8K | 0.5% | —Held | |
| 49 | SPDR Series Trust ST STR P400MID | $472K | 7.0K | 0.4% | ▲+18% Added · +1K sh | |
| 50 | SPDR Series Trust ST BLOO HIGH ETF | $425K | 4.4K | 0.4% | ▲+34% Added · +1K sh |
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. The performance line is a simulation of the disclosed long book, not an audited return.