STX — SEAGATE TECHNOLOGY PLC SHS

Ownership history in Parallax Volatility Advisers, L.P.  ·  113 quarters on record

AI Ownership Summary

Parallax Volatility Advisers, L.P. reported SEAGATE TECHNOLOGY PLC SHS (STX) in 113 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 0.07% in 2024 Q3. The latest visible filing shows STX at 0.02% 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 STX ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Parallax Volatility Advisers, L.P.'s position in SEAGATE TECHNOLOGY PLC SHS, 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 Q4

STX was reported at 0.02% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.07% in 2024 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 Q4

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.

STX stock page Parallax Volatility Advisers, L.P. fund profile Parallax Volatility Advisers, L.P. full holdings
How Parallax Volatility Advisers, L.P. held STX — position size vs. price
% of Fund (quarterly)    STX price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 15 quarters  ▾
Quarter Action Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 27,658 -2,342 -7.8% 0.02% $7.6M 2026-02-14 (Est.) $425.25
2025 Q4 REDUCED 30,000 -4,900 -14.0% 0.02% $8.3M 2026-02-14 (Est.) $425.25
2025 Q3 REDUCED 34,900 -27,092 -43.7% 0.01% $8.2M 2025-11-14 $257.09
2025 Q3 ADDED 61,992 +49,492 +395.9% 0.02% $14.6M 2025-11-14 $257.09
2025 Q3 ADDED 12,500 +4,200 +50.6% 0.00% $3.0M 2025-11-14 $257.09
2024 Q4 REDUCED 8,300 -251,700 -96.8% 0.00% $716K 2025-02-14 $99.37
2024 Q4 REDUCED 260,000 -89,900 -25.7% 0.04% $22.4M 2025-02-14 $99.37
2024 Q3 ADDED 349,900 +169,900 +94.4% 0.07% $38.3M 2024-11-14 $94.73
2024 Q3 REDUCED 180,000 -14,900 -7.6% 0.04% $19.7M 2024-11-14 $94.73
2024 Q2 ADDED 194,900 +87,100 +80.8% 0.04% $20.1M 2024-08-14 $93.72
2024 Q2 ADDED 107,800 +20,600 +23.6% 0.02% $11.1M 2024-08-14 $93.72
2024 Q1 REDUCED 87,200 -108,000 -55.3% 0.02% $8.1M 2024-05-15 $94.69
2024 Q1 REDUCED 195,200 -137,000 -41.2% 0.04% $18.2M 2024-05-15 $94.69
2023 Q4 ADDED 332,200 +157,200 +89.8% 0.06% $28.4M 2024-02-14 $82.59
2023 Q4 REDUCED 175,000 -139,200 -44.3% 0.03% $14.9M 2024-02-14 $82.59
98 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding STX

As of 2026 Q1 — sorted by position size

Amanah Holdings Trust 12.5% CACTI ASSET MANAGEMENT LLC 3Y 7Y 12.24% Dedeker Financial LLC 3.99% Old Port Advisors 3Y 7Y 2.89% Green Alpha Advisors, LLC 3Y 2.2% AFFINITY WEALTH MANAGEMENT LLC 3Y 7Y 1.9% Abacus FCF Advisors LLC 3Y 7Y 1.81% Steadtrust LLC 1.66% KWMG, LLC 3Y 7Y 1.58% Hanson & Doremus Investment Management 3Y 7Y 1.5%

FAQ About Parallax Volatility Advisers, L.P. and STX

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

How long has Parallax Volatility Advisers, L.P. reported owning STX?

Parallax Volatility Advisers, L.P. reported STX across 15 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported STX position in Parallax Volatility Advisers, L.P.'s portfolio?

The largest reported portfolio weight for STX was 0.07% in 2024 Q3.

What is the latest reported STX position on this page?

The most recent filing on this page is 2025 Q4, when Parallax Volatility Advisers, L.P. reported 27,658 shares, equal to 0.02% of portfolio, with an estimated market value of $7.6M.

What does the chart on this STX ownership page compare?

The chart compares Parallax Volatility Advisers, L.P.'s quarterly STX 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.

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