October Effect Ltd
- SEC CIK
- 0002078353
- Latest filing
- Oct 20, 2026
The latest 13F from October Effect Ltd covers Q3 2026 (filed Oct 20, 2026): 62 long positions worth $98.3M. The top 10 holdings make up 46.8% of the portfolio, and the largest is NVIDIA Corp (NVDA) at 8.5%. Livermore has 6 filings on Form 13F from this institution, going back to Q2 2025.
What changed in Q3 2026
Full comparisonShare counts compared with Q2 2026: how many positions were new, added to, reduced or sold out, and the biggest buys and sells. Dollar amounts are estimated at the quarter-end prices implied by the filing.
- New
- 4
- Est. +$1.56M
- Added
- 20
- Est. +$6.59M
- Reduced
- 28
- Est. −$4.59M
- Sold out
- 6
- Est. −$4.36M
Top 5 holdings
Share of this quarter's portfolio value
Biggest buys
New and added positions, by estimated amount bought
- Neos ETF Trust78433H675+$2.79MAdded
- Direxion Shs ETF Tr25459W458+$977.9KAdded
- Calamos ETF Tr12811T571+$831.3KNew
- State Street SPDR Bloomberg 1-3 Month T-Bill ETF78468R663+$701.8KAdded
- GOOGLAlphabet Inc.
Largest weight increases
New and added positions, by percentage points of the portfolio gained
Biggest sells
Reduced and sold-out positions, by estimated amount sold
Largest weight decreases
Reduced and sold-out positions, by percentage points of the portfolio lost
Metrics
13F metrics for Q3 2026, computed only from the numbers in the filings. Definitions below.
- Portfolio value
- $98.3M
- −$8.04M (−7.6%) vs. prior quarter
- Positions
- 62
- −2 vs. prior quarter
- Top 10 concentration
- 46.8%
- Top 10 as share of value
- Turnover
- 8.0%
- Q3 2026, one quarter
- Average holding period
- 4.8 quarters
- Weighted by value
How these are calculated
- Portfolio value: the market value of all long positions in the 13F, as reported at quarter end, excluding options.
- Top 10 concentration: the combined value of the 10 largest positions as a share of portfolio value.
- Turnover: the smaller of this quarter's estimated purchases and estimated sales, divided by the average of this and last quarter's portfolio value. Estimates multiply the change in shares by the quarter-end price implied by the filing (market value divided by shares); new positions use this quarter's value and sold-out positions last quarter's. Only positions reported in shares count, and it is not calculated when the previous quarter was not filed.
- Average holding period: how many consecutive quarters each current position has been held (including this one; a quarter without the position or without a filing starts the count over), weighted by this quarter's value. Counting starts with the first 13F in Livermore (Q2 2025), so positions held before then are understated.
13F filings by quarter
6 quarters, going back to Q2 2025. Bars show each quarter's 13F portfolio value; quarters without a filing are left blank.
Peak $106.3M (Q2 2026)
| Quarter | Filed | Positions | Value | Top 3 holdings | Changes | Filing |
|---|---|---|---|---|---|---|
| Q3 2026 | Oct 20, 2026 | 62 | $98.3M | NVDAWDCMETA | vs. Q2 2026 | SEC |
| Q2 2026 | Jul 21, 2026 | 64 | $106.3M | WDCNVDAINTC | vs. Q1 2026 | SEC |
| Q1 2026 | Apr 21, 2026 | 64 | $86.8M | NVDAPSLVState Street SPDR Bloomberg 1-3 Month T-Bill ETF | vs. Q4 2025 | SEC |
| Q4 2025 | Jan 20, 2026 | 61 | $90.8M | NVDAMETAState Street SPDR Bloomberg 1-3 Month T-Bill ETF | vs. Q3 2025 | SEC |
| Q3 2025 | Oct 31, 2025 | 55 | $90.7M | State Street SPDR Bloomberg 1-3 Month T-Bill ETFNVDAMETA | vs. Q2 2025 | SEC |
| Q2 2025 | Aug 11, 2025 | 52 | $82.9M | NVDAMETAState Street SPDR Bloomberg 1-3 Month T-Bill ETF | – | SEC |