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Insider · CIK 0001713941

David Goeckeler

directorceoofficerchair

Files at ADP (AUTOMATIC DATA PROCESSING INC), WDC (WESTERN DIGITAL CORP), SNDK (Sandisk Corp). First filing Oct 28, 2024, latest Sep 21, 2026.

Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 3
$0 bought, $110M sold

Where the trades landed

Last year at the 2 companies this insider has traded most, with each buy and sell on the bar it happened.

SNDK: Sandisk Corp

SNDKOct 9, 2026 · close 1,582

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

WDC: WESTERN DIGITAL CORP

WDCOct 9, 2026 · close 397.28

Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™

Signals

This insider’s open-market buys and sells, scored.

ScoreCompanyValueHoldingsPrice contextFiled
45Moderate
SNDKsell 410b5-1
Sandisk Corp
$53M
33,841 shares
-8%+1618% from low-31% from high
45Moderate
SNDKsell 410b5-1
Sandisk Corp
$52M
33,838 shares
-8%+1623% from low-34% from high
45Moderate
WDCsell 310b5-1
WESTERN DIGITAL CORP
$5.4M
75,000 shares
-8%-

Transactions

Every row this insider has filed, newest first.

DateCompanyTransactionSharesPriceValueHoldings afterFiled
Sep 17, 2026SNDK
Sandisk Corp
AGrant or award
Common Stock10b5-1
+3,296$0.00$0416,70621 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-40$1,567.26$63k416,66621 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-9,604$1,569.00$15M407,06221 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-910$1,570.04$1.4M406,15221 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-4,558$1,571.21$7.2M401,59421 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-1,157$1,572.60$1.8M400,43721 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-306$1,573.15$481k400,13121 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-2,588$1,574.57$4.1M397,54321 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-2,778$1,575.58$4.4M394,76521 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-4,139$1,576.82$6.5M390,62621 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-2,876$1,578.34$4.5M387,75021 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-640$1,579.41$1.0M387,11021 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-1,480$1,580.25$2.3M385,63021 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-1,080$1,583.80$1.7M384,55021 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-1,520$1,585.85$2.4M383,03021 d ago
Sep 17, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-165$1,587.00$262k382,86521 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-14,364$1,522.59$22M432,88426 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-181$1,522.87$276k432,70326 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-3,075$1,524.27$4.7M429,62826 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-2,280$1,526.45$3.5M427,34826 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-4,080$1,528.45$6.2M423,26826 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-359$1,529.36$549k422,90926 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-1,200$1,532.17$1.8M421,70926 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-700$1,535.12$1.1M421,00926 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-1,695$1,535.96$2.6M419,31426 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-3,200$1,537.68$4.9M416,11426 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-1,480$1,539.19$2.3M414,63426 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-864$1,540.78$1.3M413,77026 d ago
Sep 14, 2026SNDK
Sandisk Corp
SOpen-market sale
Common Stock10b5-1
-360$1,541.88$555k413,41026 d ago
Sep 3, 2026SNDK
Sandisk Corp
FTax withholding
Common Stock
-10,540$1,554.99$16M447,24834 d ago
Mar 12, 2025SNDK
Sandisk Corp
FTax withholding
Common Stock
-3,847$50.44$194k482,099Mar 14, 2025
Feb 21, 2025SNDK
Sandisk Corp
AGrant or award
Common Stock
+92,417$0.00$0270,765Feb 25, 2025
Feb 21, 2025SNDK
Sandisk Corp
AGrant or award
Common Stock
+215,181$0.00$0485,946Feb 25, 2025
Nov 27, 2024WDC
WESTERN DIGITAL CORP
FTax withholding
Common Stock
-2,939$71.50$210k812,303Dec 2, 2024
Nov 25, 2024WDC
WESTERN DIGITAL CORP
FTax withholding
Common Stock
-3,632$69.43$252k815,242Nov 26, 2024
Nov 20, 2024WDC
WESTERN DIGITAL CORP
FTax withholding
Common Stock
-2,756$63.84$176k818,874Nov 22, 2024
Nov 6, 2024ADP
AUTOMATIC DATA PROCESSING INC
AGrant or award
Common Stock
+1,179$0.00$05,209Nov 7, 2024
Oct 25, 2024WDC
WESTERN DIGITAL CORP
SOpen-market sale
Common Stock10b5-1
-75,000$72.59$5.4M821,630Oct 28, 2024

Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.

David Goeckeler: insider trades and track record | InsiderTell