RENAISSANCE TECHNOLOGIES LLC WDC — WESTERN DIGITAL CORP

Ownership history in RENAISSANCE TECHNOLOGIES LLC  ·  83 quarters on record

AI Ownership Summary

RENAISSANCE TECHNOLOGIES LLC reported WESTERN DIGITAL CORP (WDC) in 83 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.48% in 2026 Q1. The latest visible filing shows WDC at 0.48% 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 WDC ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was RENAISSANCE TECHNOLOGIES LLC's position in WESTERN DIGITAL CORP, 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 Q1

WDC was reported at 0.48% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.48% in 2026 Q1

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 2026 Q1

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.

WDC stock page RENAISSANCE TECHNOLOGIES LLC fund profile RENAISSANCE TECHNOLOGIES LLC full holdings
How RENAISSANCE TECHNOLOGIES LLC held WDC — position size vs. price
% of Fund (quarterly)    WDC price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 1,146,133 +153,600 +15.5% 0.48% $310.0M 2026-05-14 $489.15
2025 Q4 REDUCED 13.6% +57.1% ❌ 992,533 -156,229 -13.6% 0.27% $171.0M 2026-02-12 $283.96
2025 Q3 ADDED — — — 1,148,762 +946,929 +469.2% 0.18% $137.9M 2025-11-14 (Est.) $157.63
2025 Q2 ADDED — — — 201,833 +131,900 +188.6% 0.02% $12.9M 2025-08-13 $75.88
2025 Q1 REDUCED 92.3% +58.5% ❌ 69,933 -842,200 -92.3% 0.00% $2.8M 2025-05-14 $48.99
2024 Q4 REDUCED 25.1% -10.3% ✅ 912,133 -306,100 -25.1% 0.08% $54.4M 2025-02-13 $50.85
2024 Q3 ADDED — — — 1,218,233 +878,100 +258.2% 0.13% $83.2M 2024-11-13 $47.21
2024 Q1 REDUCED 30.2% +11.9% ❌ 340,133 -147,000 -30.2% 0.04% $23.2M 2024-05-13 $53.41
2023 Q4 ADDED — — — 487,133 +16,300 +3.5% 0.04% $25.5M 2024-02-13 $41.65
74 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding WDC

As of 2026 Q1 — sorted by position size

Central Asset Investments & Management Holdings (HK) Ltd 3Y 7Y 18.5% PINNBROOK CAPITAL MANAGEMENT LP 3Y 10.54% Amanah Holdings Trust 9.38% Up Capital Management, Inc. 8.61% Talos Eurisko Asset Management LP 8.03% Trivest Advisors Ltd 3Y 6.72% Rivermont Capital Management LP 3Y 6.59% S&T BANK/PA 3Y 7Y 4.9% WT Asset Management Ltd 3Y 4.63% Williamson Legacy Group, LLC 4.05%

FAQ About RENAISSANCE TECHNOLOGIES LLC and WDC

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

How long has RENAISSANCE TECHNOLOGIES LLC reported owning WDC?

RENAISSANCE TECHNOLOGIES LLC reported WDC across 9 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported WDC position in RENAISSANCE TECHNOLOGIES LLC's portfolio?

The largest reported portfolio weight for WDC was 0.48% in 2026 Q1.

What is the latest reported WDC position on this page?

The most recent filing on this page is 2026 Q1, when RENAISSANCE TECHNOLOGIES LLC reported 1,146,133 shares, equal to 0.48% of portfolio, with an estimated market value of $310.0M.

What does the chart on this WDC ownership page compare?

The chart compares RENAISSANCE TECHNOLOGIES LLC's quarterly WDC 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 RENAISSANCE TECHNOLOGIES LLC time their WDC position?

Based on 13F filing dates vs. subsequent WDC price moves, RENAISSANCE TECHNOLOGIES LLC correctly timed 39 out of 75 reported position changes (52%). The annualised alpha on WDC relative to SPY over the holding period was +10.6%.

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