Goeckeler David

Insider

Chairman and CEO

Trades at: SNDK· ADP· WDC

30D 90D 1Y

No open-market buys or sells in this period. The transactions below are grants, option exercises and gifts, which carry no market price.

Trading track record · all companies

Running net of open-market buys − sells across every company. Tap the line or a marker for details. ▲ buy · ▼ sell.

Transactions · 365d

Open-market Buys Sells All types

No open-market buys or sells in this period — showing all activity (grants, exercises & gifts).

SNDK Other·F
May 25, 26

Chairman and CEO

$2.3M

1.6K sh · $1,478.69

Own -0%
SNDK Other·F
May 21, 26

Chairman and CEO

$3.4M

2.3K sh · $1,458.83 avg · 2 lots

Own -0%
SNDK Other·F
Feb 25, 26

Chairman & CEO

$992.2K

1.6K sh · $632.38

Own -0%
SNDK Other·F
Feb 21, 26

Chairman & CEO

$1.5M

2.3K sh · $649.97 avg · 2 lots

Own -0%
SNDK Other·F
Nov 25, 25

Chief Executive Officer

$346.0K

1.6K sh · $220.50

Own -0%
SNDK Other·F
Nov 21, 25

Chief Executive Officer

$461.2K

2.3K sh · $197.87 avg · 2 lots

Own -0%
ADP Grant·A
Nov 12, 25

Director

$0

1.5K sh

Own +28%
SNDK Grant·A
Sep 3, 25

Chairman and CEO

$0

85.0K sh

Own +19%
SNDK Other·F
Aug 27, 25

Chairman and CEO

$120.9K

2.5K sh · $47.42 avg · 2 lots

Own -1%
SNDK Other·F
Aug 21, 25

Chairman and CEO

$1.7M

39.1K sh · $44.52 avg · 2 lots

Own -8%

Date▾	Ticker	Role	Type	Shares	Own Δ	Price	Value
May 25, 2026	SNDK	Chairman and CEO	Other F	1.6K	-0%	$1,478.69	$2.3M
May 21, 2026	SNDK	Chairman and CEO	Other F	2.3K2 lots	-0%	$1,458.83 avg	$3.4M
Feb 25, 2026	SNDK	Chairman & CEO	Other F	1.6K	-0%	$632.38	$992.2K
Feb 21, 2026	SNDK	Chairman & CEO	Other F	2.3K2 lots	-0%	$649.97 avg	$1.5M
Nov 25, 2025	SNDK	Chief Executive Officer	Other F	1.6K	-0%	$220.50	$346.0K
Nov 21, 2025	SNDK	Chief Executive Officer	Other F	2.3K2 lots	-0%	$197.87 avg	$461.2K
Nov 12, 2025	ADP	Director	Grant A	1.5K	+28%	—	$0
Sep 3, 2025	SNDK	Chairman and CEO	Grant A	85.0K	+19%	—	$0
Aug 27, 2025	SNDK	Chairman and CEO	Other F	2.5K2 lots	-1%	$47.42 avg	$120.9K
Aug 21, 2025	SNDK	Chairman and CEO	Other F	39.1K2 lots	-8%	$44.52 avg	$1.7M

Buy Sell Non-market (grant · exercise · gift)

About Goeckeler David

This profile aggregates every SEC Form 4 insider transaction reported by Goeckeler David across all companies they trade. Open-market purchases (code P) and sales (code S) are the highest-signal, discretionary trades; grants (A), option exercises (M) and gifts (G) reflect compensation rather than conviction and carry no market price. Figures cover the selected period and update as new filings are ingested.