Cubist Systematic Strategies, LLC NET — CLOUDFLARE INC

Ownership history in Cubist Systematic Strategies, LLC  ·  40 quarters on record

AI Ownership Summary

Cubist Systematic Strategies, LLC reported CLOUDFLARE INC (NET) in 40 quarterly 13F filings from 2023 Q4 through 2025 Q3. Peak portfolio weight reached 0.27% in 2025 Q3. The latest visible filing shows NET at 0.27% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this NET ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Cubist Systematic Strategies, LLC's position in CLOUDFLARE INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q3

NET was reported at 0.27% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.27% in 2025 Q3

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2025 Q3

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

NET stock page Cubist Systematic Strategies, LLC fund profile Cubist Systematic Strategies, LLC full holdings
How Cubist Systematic Strategies, LLC held NET — position size vs. price
% of Fund (quarterly)    NET price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 19 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q3 ADDED — — — 265,100 +22,600 +9.3% 0.27% $56.9M 2025-11-14 (Est.) $210.60
2025 Q3 REDUCED 9.4% -6.5% ✅ 242,500 -25,100 -9.4% 0.25% $52.0M 2025-11-14 (Est.) $210.60
2025 Q2 ADDED — — — 267,600 +148,500 +124.7% 0.24% $52.4M 2025-08-14 $195.38
2025 Q2 REDUCED 36.3% +11.6% ❌ 119,100 -68,000 -36.3% 0.11% $23.3M 2025-08-14 $195.38
2025 Q1 REDUCED — — — 187,100 -2,200 -1.2% 0.13% $21.1M 2025-05-15 $152.80
2025 Q1 ADDED — — — 189,300 +108,456 +134.2% 0.13% $21.3M 2025-05-15 $152.80
2025 Q1 REDUCED 35.6% +73.8% ❌ 80,844 -44,656 -35.6% 0.06% $9.1M 2025-05-15 $152.80
2024 Q4 REDUCED — — — 125,500 -3,200 -2.5% 0.08% $13.5M 2025-02-14 $171.16
2024 Q4 REDUCED 42.6% +4.7% ❌ 128,700 -95,500 -42.6% 0.09% $13.9M 2025-02-14 $171.16
2024 Q3 ADDED — — — 224,200 +74,600 +49.9% 0.11% $18.1M 2024-11-14 $91.93
2024 Q3 REDUCED 14.6% +34.8% ❌ 149,600 -25,600 -14.6% 0.07% $12.1M 2024-11-14 $91.93
2024 Q2 ADDED — — — 175,200 +73,900 +73.0% 0.10% $14.5M 2024-08-14 $81.46
2024 Q2 REDUCED 40.6% -2.3% ✅ 101,300 -69,171 -40.6% 0.06% $8.4M 2024-08-14 $81.46
2024 Q1 ADDED — — — 170,471 +89,171 +109.7% 0.09% $16.5M 2024-05-15 $74.25
2024 Q1 ADDED — — — 81,300 +12,400 +18.0% 0.04% $7.9M 2024-05-15 $74.25
2024 Q1 REDUCED 13.9% -13.3% ✅ 68,900 -11,100 -13.9% 0.04% $6.7M 2024-05-15 $74.25
2023 Q4 REDUCED 51.0% +14.9% ❌ 80,000 -83,384 -51.0% 0.04% $6.7M 2024-02-14 $104.37
2023 Q4 ADDED — — — 163,384 +139,184 +575.1% 0.09% $13.6M 2024-02-14 $104.37
2023 Q4 REDUCED 69.8% +14.9% ❌ 24,200 -55,800 -69.8% 0.01% $2.0M 2024-02-14 $104.37
21 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding NET

As of 2026 Q1 — sorted by position size

Whetstone Capital Advisors, LLC 3Y 7Y 20.97% Strategy Capital LLC 3Y 7Y 19.21% WIM INVESTMENT MANAGEMENT Ltd 13.93% Flight Deck Capital, LP 3Y 9.7% Whetstone Capital Advisors, LLC 3Y 7Y 7.16% Capelight Capital Asset Management LP 6.16% Science & Technology Partners, L.P. 5.75% Broad Bay Capital Management, LP 3Y 7Y 5.34% Arrow Capital Pty Ltd 4.87% GILDER GAGNON HOWE & CO LLC 3Y 7Y 4.4%

FAQ About Cubist Systematic Strategies, LLC and NET

These are the practical questions this page is built to answer before you even open the full history table.

How long has Cubist Systematic Strategies, LLC reported owning NET?

Cubist Systematic Strategies, LLC reported NET across 19 quarterly 13F filings, from 2023 Q4 through 2025 Q3.

What was the largest reported NET position in Cubist Systematic Strategies, LLC's portfolio?

The largest reported portfolio weight for NET was 0.27% in 2025 Q3.

What is the latest reported NET position on this page?

The most recent filing on this page is 2025 Q3, when Cubist Systematic Strategies, LLC reported 265,100 shares, equal to 0.27% of portfolio, with an estimated market value of $56.9M.

What does the chart on this NET ownership page compare?

The chart compares Cubist Systematic Strategies, LLC's quarterly NET portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did Cubist Systematic Strategies, LLC time their NET position?

Based on 13F filing dates vs. subsequent NET price moves, Cubist Systematic Strategies, LLC correctly timed 26 out of 39 reported position changes (67%). The annualised alpha on NET relative to SPY over the holding period was +20.7%.

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