S&T BANK/PA WDC — WESTERN DIGITAL CORP

Ownership history in S&T BANK/PA  ·  83 quarters on record

AI Ownership Summary

S&T BANK/PA reported WESTERN DIGITAL CORP (WDC) in 83 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 4.9% in 2026 Q1. The latest visible filing shows WDC at 4.90% 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 S&T BANK/PA'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 4.90% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
4.9% 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 S&T BANK/PA fund profile S&T BANK/PA full holdings
How S&T BANK/PA 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 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 48,501 -18,091 -27.2% 4.90% $13.1M 2026-05-13 $493.96
2025 Q4 REDUCED 16.9% +57.1% ❌ 66,592 -13,527 -16.9% 3.63% $11.5M 2026-02-13 $281.37
2025 Q3 REDUCED 18.1% +49.8% ❌ 80,119 -17,744 -18.1% 2.70% $9.6M 2025-11-14 $157.59
2025 Q2 REDUCED — — — 97,863 -5,144 -5.0% 1.90% $6.3M 2025-08-06 $73.58
2025 Q1 REDUCED — — — 103,007 -1,010 -1.0% 1.36% $4.2M 2025-05-15 $49.52
2024 Q4 REDUCED 11.6% -10.3% ✅ 104,017 -13,650 -11.6% 1.98% $6.2M 2025-02-14 $51.46
2024 Q3 REDUCED 8.1% -12.7% ✅ 117,667 -10,381 -8.1% 2.11% $8.0M 2024-11-13 $47.20
2024 Q2 REDUCED 28.8% -9.9% ✅ 128,048 -51,881 -28.8% 2.47% $9.7M 2024-08-14 $46.28
2024 Q1 REDUCED 7.8% +11.9% ❌ 179,929 -15,305 -7.8% 2.35% $12.3M 2024-05-15 $56.95
2023 Q4 REDUCED 6.0% +35.3% ❌ 195,234 -12,493 -6.0% 1.89% $10.2M 2024-02-14 $42.20
73 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% Maple Rock Capital Partners Inc. 3Y 7Y 12.32% PINNBROOK CAPITAL MANAGEMENT LP 3Y 10.54% 53 HOUSE LLP 3Y 7Y 10.0% 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% Grand Alliance Asset Management Ltd 5.9%

FAQ About S&T BANK/PA and WDC

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

How long has S&T BANK/PA reported owning WDC?

S&T BANK/PA reported WDC across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported WDC position in S&T BANK/PA's portfolio?

The largest reported portfolio weight for WDC was 4.90% in 2026 Q1.

What is the latest reported WDC position on this page?

The most recent filing on this page is 2026 Q1, when S&T BANK/PA reported 48,501 shares, equal to 4.90% of portfolio, with an estimated market value of $13.1M.

What does the chart on this WDC ownership page compare?

The chart compares S&T BANK/PA'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 S&T BANK/PA time their WDC position?

Based on 13F filing dates vs. subsequent WDC price moves, S&T BANK/PA correctly timed 36 out of 80 reported position changes (45%). The annualised alpha on WDC relative to SPY over the holding period was +10.9%.

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