Walleye Trading LLC WDC — WESTERN DIGITAL CORP COM

Ownership history in Walleye Trading LLC  ·  168 quarters on record

AI Ownership Summary

Walleye Trading LLC reported WESTERN DIGITAL CORP COM (WDC) in 168 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 0.4% in 2025 Q4. The latest visible filing shows WDC 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 WDC ownership page tells you

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

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

High-water mark
Peak Conviction
0.4% in 2025 Q4

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.

WDC stock page Walleye Trading LLC fund profile Walleye Trading LLC full holdings
How Walleye Trading 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 25 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 94.4% +57.1% ❌ 91,508 -1,547,992 -94.4% 0.02% $15.8M 2026-02-14 (Est.) $281.45
2025 Q4 ADDED — — — 1,639,500 +228,100 +16.2% 0.40% $282.4M 2026-02-14 (Est.) $281.45
2025 Q4 ADDED — — — 1,411,400 +46,800 +3.4% 0.22% $157.0M 2026-02-14 (Est.) $281.45
2025 Q3 REDUCED 9.3% +49.8% ❌ 1,364,600 -139,500 -9.3% 0.16% $103.8M 2025-11-14 $157.63
2025 Q3 ADDED — — — 1,504,100 +1,457,808 +3149.2% 0.27% $180.6M 2025-11-14 $157.63
2025 Q3 REDUCED 96.5% +49.8% ❌ 46,292 -1,279,508 -96.5% 0.01% $5.6M 2025-11-14 $157.63
2025 Q2 ADDED — — — 1,325,800 +1,254,802 +1767.4% 0.10% $52.8M 2025-08-13 $75.88
2025 Q2 REDUCED 94.0% +82.7% ❌ 70,998 -1,119,502 -94.0% 0.01% $4.5M 2025-08-13 $75.88
2025 Q2 REDUCED — — — 1,190,500 -22,200 -1.8% 0.14% $76.2M 2025-08-13 $75.88
2025 Q1 REDUCED 26.7% +58.5% ❌ 1,212,700 -441,100 -26.7% 0.11% $49.0M 2025-05-14 $48.99
2025 Q1 ADDED — — — 1,653,800 +1,094,889 +195.9% 0.11% $46.6M 2025-05-14 $48.99
2025 Q1 ADDED — — — 558,911 +143,087 +34.4% 0.05% $22.6M 2025-05-14 $48.99
2024 Q4 REDUCED 57.7% -10.3% ✅ 415,824 -568,276 -57.7% 0.05% $24.8M 2025-02-13 $50.85
2024 Q4 REDUCED 20.8% -10.3% ✅ 984,100 -259,200 -20.8% 0.12% $58.7M 2025-02-13 $50.85
2024 Q4 ADDED — — — 1,243,300 +192,900 +18.4% 0.16% $74.1M 2025-02-13 $50.85
2024 Q3 REDUCED 10.5% -12.7% ✅ 1,050,400 -123,300 -10.5% 0.15% $71.7M 2024-11-14 $47.58
2024 Q3 ADDED — — — 1,173,700 +876,286 +294.6% 0.17% $80.2M 2024-11-14 $47.58
2024 Q3 REDUCED 76.5% -12.7% ✅ 297,414 -966,586 -76.5% 0.04% $20.3M 2024-11-14 $47.58
2024 Q2 REDUCED 12.5% -9.9% ✅ 1,264,000 -179,800 -12.5% 0.23% $95.8M 2024-08-14 $46.29
2024 Q2 ADDED — — — 1,443,800 +463,000 +47.2% 0.26% $109.4M 2024-08-14 $46.29
2024 Q1 ADDED — — — 980,800 +58,600 +6.4% 0.14% $66.9M 2024-05-15 $56.96
2024 Q1 ADDED — — — 922,200 +572,300 +163.6% 0.13% $62.9M 2024-05-15 $56.96
2023 Q4 ADDED — — — 349,900 +252,840 +260.5% 0.04% $18.3M 2024-02-14 $42.21
2023 Q4 REDUCED 88.6% +35.3% ❌ 97,060 -751,540 -88.6% 0.01% $5.1M 2024-02-14 $42.21
2023 Q4 ADDED — — — 848,600 +401,100 +89.6% 0.10% $44.4M 2024-02-14 $42.21
143 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

Amanah Holdings Trust 9.38% Up Capital Management, Inc. 8.61% Trivest Advisors Ltd 3Y 6.72% WT Asset Management Ltd 3Y 4.63% Attestor Capital Ltd 3.77% WCM INVESTMENT MANAGEMENT, LLC 3Y 7Y 3.77% CHAPIN DAVIS, INC. 3Y 3.68% Dilation Capital Management LP 3.54% Retireful, LLC 3Y 3.05% Spartan Wealth Advisory Services LLC 3.03%

FAQ About Walleye Trading 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 Walleye Trading LLC reported owning WDC?

Walleye Trading LLC reported WDC across 25 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported WDC position in Walleye Trading LLC's portfolio?

The largest reported portfolio weight for WDC was 0.40% in 2025 Q4.

What is the latest reported WDC position on this page?

The most recent filing on this page is 2025 Q4, when Walleye Trading LLC reported 91,508 shares, equal to 0.02% of portfolio, with an estimated market value of $15.8M.

What does the chart on this WDC ownership page compare?

The chart compares Walleye Trading 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 Walleye Trading LLC time their WDC position?

Based on 13F filing dates vs. subsequent WDC price moves, Walleye Trading LLC correctly timed 85 out of 167 reported position changes (51%). The annualised alpha on WDC relative to SPY over the holding period was +5.5%.

← Back to Walleye Trading LLC Holdings