WESTERN DIGITAL CORP
OPTION
CUSIP: 958102905
Institutional Holders10
Total Institutional Value$253,929,015
Total Shares Held2,416,501
Avg Position$25,392,902
Top 5 Holders %100.0%
Alpha-Weighted Score57.7
New Positions+2
Exited Positions-3
Top 15 Institutional Holders by Value
■ New ■ Increased ■ Decreased ■ Unchanged
Institutional Holders — Q4 25
| Manager | Alpha | Flow | Value | Shares | Change |
|---|---|---|---|---|---|
| IMC-CHICAGO, LLC | Moderate Conviction | Significant Flow | $160,779,591 (63.3%) | 933,300 | 74.0% |
| SIMPLEX TRADING, LLC | Moderate Conviction | Market Mover | $44,260,090 (17.4%) | 257,400 | 69,971.7% |
| GROUP ONE TRADING, L.P. | Moderate Conviction | Significant Flow | $40,793,536 (16.1%) | 236,800 | 81.2% |
| JPMORGAN CHASE & CO | High Conviction | Market Mover | $6,529,033 (2.6%) | 37,900 | -45.6% |
| HRT FINANCIAL LP | High Conviction | Low Flow | $11,748 (0.0%) | 68,200 | NEW |
| OSAIC HOLDINGS, INC. | Moderate Conviction | Market Mover | $9,450 (0.0%) | 1 | NEW |
| CMT CAPITAL MARKETS TRADING GMBH | Moderate Conviction | Minimal Flow | $6,959 (0.0%) | 40,400 | 479.4% |
| SG AMERICAS SECURITIES, LLC | High Conviction | Low Flow | $4,358 (0.0%) | 672,500 | -66.3% |
Implied Institutional Price History
Estimated from 13F aggregate market value ÷ shares reported across all institutional filers. Reflects quarter-end snapshot, not actual trade prices.
| Quarter | Filers | Institutional Value | Shares Held | Est. Avg Price |
|---|---|---|---|---|
| Q4 25 | 9 | $0.25B | 2,416,501 | $105.08 |
| Q3 25 | 9 | $0.13B | 2,101,100 | $61.32 |
| Q2 25 | 7 | $0.05B | 1,289,000 | $38.67 |
| Q1 25 | 8 | $0.13B | 4,249,752 | $30.17 |
| Q4 24 | 8 | $0.25B | 5,221,100 | $48.02 |
| Q3 24 | 8 | $0.14B | 3,247,800 | $44.52 |
| Q2 24 | 8 | $0.23B | 4,287,300 | $53.28 |
| Q1 24 | 9 | $0.22B | 4,303,800 | $50.76 |
Source: SEC 13F-HR filings. Implied price = aggregate market value ÷ shares reported. Not investment advice.