Reporting owner · CIK 0002057088
Tregillis Cynthia L
Visual SEC Form 4 history across 1 companies, 46 transactions and 10 filings.
CLO, CSChief Legal Officer & Corp SecWESTERN DIGITAL CORP
Open-market mix
0%buys
Open-market buy performance
90-day forward return on this insider's open-market purchases
Forward return is not available yet
We compute this from each buy's stock performance 90 days after the transaction. The price history is still being populated for this insider's their open-market buys, so the average and median will appear here once the daily price refresh has covered the relevant trading days.
Monthly open-market activity
Reported purchase and sale transaction counts
Buys Sells
Net value flow
Buys minus sells
Mar 25
$0
Jan 26
−$102.4K
Feb 26
−$2M
Mar 26
−$2.5M
May 26
−$266K
Jun 26
−$235.7K
Aug 26
−$1.1M
Transaction texture
Ownership and ticket size
Average P/S size$475.1K
Median P/S size$200.4K
Direct46
Indirect0
Aug 27, 2026sale
Filing-only signals
Deterministic matches in this insider's history
Latest Form 4 facts
Quick context from source filings
Latest buy
No open-market insider purchase is available.
Associated companies
Visual map of known reporting history
| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| WDC | Tregillis Cynthia L | CLOCS | withholding10b5-1 | 2.79k | -$70.1M | F | +129.4% | 03/05 | 03/03 | |
| WDC | Tregillis Cynthia L | CLOCS | exercise10b5-1 | 23 | $0 | M | +129.4% | 03/05 | 03/03 | |
| WDC | Tregillis Cynthia L | CLOCS | exercise10b5-1 | 9 | $0 | M | +79.0% | 02/24 | 02/21 | |
| WDC | Tregillis Cynthia L | CLOCS | exercise10b5-1 | 3 | $0 | M | +79.0% | 02/24 | 02/20 | |
| WDC | Tregillis Cynthia L | CLOCS | sale10b5-1 | 308 | -$8.67M | S | +79.0% | 02/24 | 02/24 | |
| WDC | Tregillis Cynthia L | CLOCS | sale10b5-1 | 130 | -$3.68M | S | +79.0% | 02/24 | 02/23 | |
| WDC | Tregillis Cynthia L | CLOCS | withholding10b5-1 | 1.10k | -$31.6M | F | +79.0% | 02/24 | 02/21 | |
| WDC | Tregillis Cynthia L | CLOCS | exercise10b5-1 | 9 | $0 | M | +79.0% | 02/24 | 02/21 | |
| WDC | Tregillis Cynthia L | CLOCS | withholding10b5-1 | 244 | -$6.96M | F | +79.0% | 02/24 | 02/20 | |
| WDC | Tregillis Cynthia L | CLOCS | exercise10b5-1 | 3 | $0 | M | +79.0% | 02/24 | 02/20 |
Tregillis Cynthia L Insider Activity FAQ
SEC Form 4 context
Who is Tregillis Cynthia L?
Tregillis Cynthia L is a reporting owner in SEC Form 4 filings with reporting owner CIK 0002057088.
Which companies has Tregillis Cynthia L reported transactions for?
WESTERN DIGITAL CORP
When was Tregillis Cynthia L's latest insider buy?
No open-market insider purchase is available for this period.
When was Tregillis Cynthia L's latest insider sale?
sale at WESTERN DIGITAL CORP on Aug 27, 2026 valued at $481,709.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
This version does not calculate win rates, forward returns, benchmark-adjusted returns, or high-conviction scores.