M&G Plc STX — SEAGATE TECHNOLOGY HLDNGS PL

Ownership history in M&G Plc  ·  14 quarters on record

AI Ownership Summary

M&G Plc reported SEAGATE TECHNOLOGY HLDNGS PL (STX) in 14 quarterly 13F filings from 2024 Q1 through 2026 Q2. Peak portfolio weight reached 0.67% in 2026 Q2. The latest visible filing shows STX at 0.06% 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.

What this STX ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was M&G Plc's position in SEAGATE TECHNOLOGY HLDNGS PL, 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
2026 Q2

STX was reported at 0.06% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.67% in 2026 Q2

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

Time in book
Holding Window
2024 Q1 to 2026 Q2

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 M&G Plc fund profile M&G Plc full holdings
How M&G Plc 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 14 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q2 REDUCED — — — 12,000 -127,501 -91.4% 0.06% $11.6M 2026-08-06 $865.04
2026 Q2 ADDED — — — 139,501 +112,701 +420.5% 0.67% $134.6M 2026-08-06 $865.04
2026 Q1 REDUCED 87.9% +147.4% ❌ 26,800 -195,109 -87.9% 0.05% $10.5M 2026-05-13 $816.77
2026 Q1 REDUCED 29.4% +147.4% ❌ 221,909 -92,479 -29.4% 0.45% $87.0M 2026-05-13 $816.77
2025 Q4 ADDED — — — 314,388 +283,488 +917.4% 0.44% $86.5M 2026-02-12 $430.11
2025 Q4 REDUCED 92.3% +42.5% ❌ 30,900 -368,564 -92.3% 0.04% $8.5M 2026-02-12 $430.11
2025 Q3 ADDED — — — 399,464 +368,564 +1192.8% 0.50% $94.3M 2025-11-07 $277.94
2025 Q3 REDUCED 93.6% +19.5% ❌ 30,900 -452,258 -93.6% 0.04% $7.3M 2025-11-07 $277.94
2025 Q2 ADDED — — — 483,158 +18,063 +3.9% 0.38% $69.6M 2025-08-08 $149.22
2025 Q1 ADDED — — — 465,095 +137,877 +42.1% 0.19% $39.5M 2025-05-13 $104.05
2024 Q4 ADDED — — — 327,218 +178,848 +120.5% 0.17% $28.1M 2025-02-11 $95.73
2024 Q3 ADDED — — — 148,370 +3,943 +2.7% 0.06% $16.3M 2024-10-31 $97.49
2024 Q2 ADDED — — — 144,427 +10,813 +8.1% 0.06% $14.9M 2024-07-16 $104.89
2024 Q1 INITIATED — — — 133,614 — — 0.05% $12.4M 2024-05-10 $90.11

🏢 Other funds also holding STX

As of 2026 Q2 — sorted by position size

Amanah Holdings Trust 16.42% CACTI ASSET MANAGEMENT LLC 3Y 7Y 15.87% Ariose Capital Management Ltd 3Y 7Y 11.38% Pinpoint Asset Management (Singapore) Pte. Ltd. 9.78% New Paradigm Capital Management, LLC 8.66% Old Port Advisors 3Y 7Y 5.77% VMS Asset Management Limited 5.48% MWA Asset Management 5.1% EXCHANGE TRADED CONCEPTS, LLC 3Y 5.08% Catherine Avery Investment Management LLC 4.89%

FAQ About M&G Plc and STX

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

How long has M&G Plc reported owning STX?

M&G Plc reported STX across 14 quarterly 13F filings, from 2024 Q1 through 2026 Q2.

What was the largest reported STX position in M&G Plc's portfolio?

The largest reported portfolio weight for STX was 0.67% in 2026 Q2.

What is the latest reported STX position on this page?

The most recent filing on this page is 2026 Q2, when M&G Plc reported 12,000 shares, equal to 0.06% of portfolio, with an estimated market value of $11.6M.

What does the chart on this STX ownership page compare?

The chart compares M&G Plc'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.

How well did M&G Plc time their STX position?

Based on 13F filing dates vs. subsequent STX price moves, M&G Plc correctly timed 9 out of 13 reported position changes (69%). The annualised alpha on STX relative to SPY over the holding period was +127.9%.

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