David Goeckeler

Insider

First SEC filing: Aug. 9, 2017 · Latest: March 10, 2022

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 83 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

83 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 25, 2026	SNDK	F	1,569	$1478.69	$2,320,065	509,903 Direct	-0.31%	Disposed	6.3% (price as of 2026-08-20)
May 21, 2026	SNDK	F	1,032	$1542.24	$1,591,592	511,472 Direct	-0.20%	Disposed	1.9% (price as of 2026-08-20)
May 20, 2026	SNDK	F	1,299	$1392.56	$1,808,935	512,504 Direct	-0.25%	Disposed	12.8% (price as of 2026-08-20)
Feb. 25, 2026	SNDK	F	1,569	$632.38	$992,204	513,803 Direct	-0.30%	Disposed	148.5% (price as of 2026-08-20)
Feb. 21, 2026	SNDK	F	1,032	$649.97	$670,769	515,372 Direct	-0.20%	Disposed	141.7% (price as of 2026-08-20)
Feb. 20, 2026	SNDK	F	1,300	$649.97	$844,961	516,404 Direct	-0.25%	Disposed	141.7% (price as of 2026-08-20)
Nov. 25, 2025	SNDK	F	1,569	$220.50	$345,964	517,704 Direct	-0.30%	Disposed	612.6% (price as of 2026-08-20)
Nov. 21, 2025	SNDK	F	1,032	$200.27	$206,679	519,273 Direct	-0.20%	Disposed	684.5% (price as of 2026-08-20)
Nov. 20, 2025	SNDK	F	1,299	$195.96	$254,552	520,305 Direct	-0.25%	Disposed	701.8% (price as of 2026-08-20)
Nov. 12, 2025	ADP	A	1,453	—	—	6,662 Direct	+27.89%	Acquired	(price as of 2026-08-20)
Sept. 3, 2025	SNDK	A	85,025	—	—	521,604 Direct	+19.48%	Acquired	(price as of 2026-08-20)
Aug. 27, 2025	SNDK	F	980	$48.44	$47,471	436,579 Direct	-0.22%	Disposed	3143.6% (price as of 2026-08-20)
Aug. 25, 2025	SNDK	F	1,569	$46.78	$73,398	437,559 Direct	-0.36%	Disposed	3258.7% (price as of 2026-08-20)
Aug. 21, 2025	SNDK	F	4,129	$45.50	$187,870	439,128 Direct	-0.93%	Disposed	3353.2% (price as of 2026-08-20)
Aug. 20, 2025	SNDK	F	34,995	$44.40	$1,553,778	443,257 Direct	-7.32%	Disposed	3438.7% (price as of 2026-08-20)
May 27, 2025	SNDK	F	979	$38.18	$37,378	478,252 Direct	-0.20%	Disposed	4015.2% (price as of 2026-08-20)
May 25, 2025	SNDK	F	1,569	$37.28	$58,492	479,231 Direct	-0.33%	Disposed	4114.6% (price as of 2026-08-20)
May 20, 2025	SNDK	F	1,299	$40.18	$52,194	480,800 Direct	-0.27%	Disposed	3810.4% (price as of 2026-08-20)
May 9, 2025	SNDK	A	953,895	—	—	953,895 Direct	—	Acquired	(price as of 2026-08-20)
March 12, 2025	SNDK	F	3,847	$50.44	$194,043	482,099 Direct	-0.79%	Disposed	3015.0% (price as of 2026-08-20)
Feb. 21, 2025	SNDK	A	92,417	—	—	270,765 Direct	+51.82%	Acquired	(price as of 2026-08-20)
Feb. 21, 2025	SNDK	A	215,181	—	—	485,946 Direct	+79.47%	Acquired	(price as of 2026-08-20)
Nov. 27, 2024	WDC	F	2,939	$71.50	$210,138	812,303 Direct	-0.36%	Disposed	747.7% (price as of 2026-08-20)
Nov. 25, 2024	WDC	F	3,632	$69.42	$252,133	815,242 Direct	-0.44%	Disposed	773.1% (price as of 2026-08-20)
Nov. 20, 2024	WDC	F	2,756	$63.84	$175,943	818,874 Direct	-0.34%	Disposed	849.4% (price as of 2026-08-20)
Nov. 6, 2024	ADP	A	1,179	—	—	5,209 Direct	+29.26%	Acquired	(price as of 2026-08-20)
Oct. 25, 2024	WDC	S 10b5-1	75,000	$72.58	$5,443,500	821,630 Direct	-8.36%	Disposed	735.1% (price as of 2026-08-20)
Sept. 26, 2024	WDC	S 10b5-1	75,000	$70.32	$5,274,000	896,630 Direct	-7.72%	Disposed	761.9% (price as of 2026-08-20)
Sept. 6, 2024	WDC	G	2,000	—	—	971,630 Direct	-0.21%	Disposed	(price as of 2026-08-20)
Sept. 3, 2024	WDC	F	15,776	$63.06	$994,835	973,630 Direct	-1.59%	Disposed	861.2% (price as of 2026-08-20)
Aug. 27, 2024	WDC	F	86,904	$62.85	$5,461,916	989,406 Direct	-8.07%	Disposed	864.4% (price as of 2026-08-20)
Aug. 25, 2024	WDC	F	18,832	$64.35	$1,211,839	1,076,310 Direct	-1.72%	Disposed	841.9% (price as of 2026-08-20)
Aug. 21, 2024	WDC	A	99,953	—	—	925,789 Direct	+12.10%	Acquired	(price as of 2026-08-20)
Aug. 21, 2024	WDC	A	169,353	—	—	1,095,142 Direct	+18.29%	Acquired	(price as of 2026-08-20)
Aug. 20, 2024	WDC	F	3,900	$64.42	$251,238	825,836 Direct	-0.47%	Disposed	840.9% (price as of 2026-08-20)
June 15, 2024	WDC	F	34,740	$78.12	$2,713,889	829,736 Direct	-4.02%	Disposed	675.9% (price as of 2026-08-20)
May 27, 2024	WDC	F	2,940	$74.81	$219,941	864,476 Direct	-0.34%	Disposed	710.2% (price as of 2026-08-20)
May 20, 2024	WDC	F	3,421	$73.05	$249,904	867,416 Direct	-0.39%	Disposed	729.7% (price as of 2026-08-20)
Feb. 27, 2024	WDC	F	2,050	$57.48	$117,834	870,837 Direct	-0.23%	Disposed	954.5% (price as of 2026-08-20)
Feb. 20, 2024	WDC	F	2,722	$54.13	$147,342	872,887 Direct	-0.31%	Disposed	1019.7% (price as of 2026-08-20)
Nov. 27, 2023	WDC	F	2,940	$47.21	$138,797	875,609 Direct	-0.33%	Disposed	1183.9% (price as of 2026-08-20)
Nov. 20, 2023	WDC	F	3,900	$47.35	$184,665	878,549 Direct	-0.44%	Disposed	1180.1% (price as of 2026-08-20)
Nov. 8, 2023	ADP	A	1,574	—	—	4,030 Direct	+64.09%	Acquired	(price as of 2026-08-20)
Sept. 3, 2023	WDC	F	61,215	$45.96	$2,813,441	882,449 Direct	-6.49%	Disposed	1218.8% (price as of 2026-08-20)
Aug. 27, 2023	WDC	F	2,940	$39.49	$116,101	943,664 Direct	-0.31%	Disposed	1434.9% (price as of 2026-08-20)
Aug. 25, 2023	WDC	F	15,601	$39.49	$616,083	794,667 Direct	-1.93%	Disposed	1434.9% (price as of 2026-08-20)
Aug. 25, 2023	WDC	A	151,937	—	—	946,604 Direct	+19.12%	Acquired	(price as of 2026-08-20)
Aug. 22, 2023	WDC	A	91,646	—	—	810,268 Direct	+12.75%	Acquired	(price as of 2026-08-20)
June 15, 2023	WDC	F	14,888	$41.08	$611,599	719,512 Direct	-2.03%	Disposed	1375.5% (price as of 2026-08-20)
May 27, 2023	WDC	F	2,940	$39.71	$116,747	733,510 Direct	-0.40%	Disposed	1426.4% (price as of 2026-08-20)
May 27, 2023	WDC	F	2,050	$39.71	$81,406	734,400 Direct	-0.28%	Disposed	1426.4% (price as of 2026-08-20)
March 8, 2023	WDC	M	5,109	—	—	950,356 Direct	+0.54%	Acquired	(price as of 2026-08-20)
March 8, 2023	WDC	F	213,906	$37.90	$8,107,037	736,450 Direct	-22.51%	Disposed	1499.3% (price as of 2026-08-20)
March 8, 2023	WDC	M	5,110	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 27, 2023	WDC	F	2,048	$38.51	$78,868	945,247 Direct	-0.22%	Disposed	1473.9% (price as of 2026-08-20)
Nov. 27, 2022	WDC	F	2,940	$37.34	$109,780	947,295 Direct	-0.31%	Disposed	1523.2% (price as of 2026-08-20)
Nov. 9, 2022	ADP	A	1,435	—	—	2,456 Direct	+140.55%	Acquired	(price as of 2026-08-20)
Sept. 3, 2022	WDC	F	15,777	$41.65	$657,112	950,235 Direct	-1.63%	Disposed	1355.3% (price as of 2026-08-20)
Aug. 27, 2022	WDC	F	11,760	$45.49	$534,962	966,012 Direct	-1.20%	Disposed	1232.4% (price as of 2026-08-20)
Aug. 25, 2022	WDC	A	125,865	—	—	977,772 Direct	+14.77%	Acquired	(price as of 2026-08-20)
June 15, 2022	WDC	A	432,489	—	—	751,807 Direct	+135.44%	Acquired	(price as of 2026-08-20)
June 15, 2022	WDC	A	100,100	—	—	851,907 Direct	+13.31%	Acquired	(price as of 2026-08-20)
June 15, 2022	WDC	A	5,110	—	—	5,110 Direct	—	Acquired	(price as of 2026-08-20)
April 6, 2022	ADP	A	1,021	—	—	1,021 Direct	—	Acquired	(price as of 2026-08-20)
March 9, 2022	WDC	M	1,246	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 9, 2022	WDC	F	49,777	$47.77	$2,377,847	319,318 Direct	-13.49%	Disposed	1168.8% (price as of 2026-08-20)
March 9, 2022	WDC	M	1,246	—	—	369,095 Direct	+0.34%	Acquired	(price as of 2026-08-20)
Sept. 3, 2021	WDC	F	15,777	$61.41	$968,866	367,849 Direct	-4.11%	Disposed	887.0% (price as of 2026-08-20)
Aug. 27, 2021	WDC	A	94,876	—	—	383,626 Direct	+32.86%	Acquired	(price as of 2026-08-20)
March 9, 2021	WDC	M	1,246	—	—	339,503 Direct	+0.37%	Acquired	(price as of 2026-08-20)
March 9, 2021	WDC	F	50,753	$69.33	$3,518,705	288,750 Direct	-14.95%	Disposed	774.3% (price as of 2026-08-20)
March 9, 2021	WDC	M	1,246	—	—	1,246 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Sept. 3, 2020	WDC	A	127,287	—	—	338,257 Direct	+60.33%	Acquired	(price as of 2026-08-20)
April 17, 2020	WDC	A	2,493	—	—	2,493 Direct	—	Acquired	(price as of 2026-08-20)
March 9, 2020	WDC	A	210,970	—	—	210,970 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 19, 2020	CSCO	F	14,738	$46.59	$686,643	315,312 Direct	-4.47%	Disposed	136.4% (price as of 2026-08-20)
Feb. 18, 2020	CSCO	S 10b5-1	40,000	$46.70	$1,868,000	330,050 Direct	-10.81%	Disposed	135.9% (price as of 2026-08-20)
Feb. 10, 2020	CSCO	F	2,966	$47.97	$142,279	370,050 Direct	-0.80%	Disposed	129.6% (price as of 2026-08-20)
July 25, 2018	CSCO	A	14,000	—	—	505,101 Direct	+2.85%	Acquired	(price as of 2026-08-20)
June 22, 2018	CSCO	S	35,000	$43.27	$1,514,450	490,458 Direct	-6.66%	Disposed	154.6% (price as of 2026-08-20)
June 11, 2018	CSCO	F	18,594	$43.48	$808,467	525,458 Direct	-3.42%	Disposed	153.3% (price as of 2026-08-20)
March 15, 2018	CSCO	S	20,671	$45.50	$940,530	544,052 Direct	-3.66%	Disposed	142.1% (price as of 2026-08-20)
March 11, 2018	CSCO	F	1,240	$45.37	$56,259	564,723 Direct	-0.22%	Disposed	142.8% (price as of 2026-08-20)
Feb. 19, 2018	CSCO	F	18,232	$44.33	$808,225	565,963 Direct	-3.12%	Disposed	148.5% (price as of 2026-08-20)
Nov. 20, 2017	CSCO	F	6,314	$35.90	$226,673	584,195 Direct	-1.07%	Disposed	206.8% (price as of 2026-08-20)
Sept. 20, 2017	CSCO	A	64,200	—	—	590,509 Direct	+12.20%	Acquired	(price as of 2026-08-20)
Sept. 11, 2017	CSCO	F	35,484	$31.48	$1,117,036	526,309 Direct	-6.32%	Disposed	249.9% (price as of 2026-08-20)
Sept. 11, 2017	CSCO	A	6,250	—	—	561,793 Direct	+1.13%	Acquired	(price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II)

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
May 9, 2025	SNDK	Performance Shares	Common Stock (953,895)	—	—	953,895	Acquired
March 8, 2023	WDC	Dividend Equivalent Rights	Common Stock (5,110)	—	—	5,110	Disposed
June 15, 2022	WDC	Dividend Equivalent Rights	Common Stock (5,110)	—	—	5,110	Acquired
March 9, 2022	WDC	Dividend Equivalent Rights	Common Stock (1,246)	—	—	1,246	Disposed
March 9, 2021	WDC	Dividend Equivalent Rights	Common Stock (1,246)	—	—	1,246	Disposed
April 17, 2020	WDC	Dividend Equivalent Rights	Common Stock (2,493)	—	—	2,493	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Aug. 9, 2017	CSCO	Common Stock	—	Direct