Dean Warren Butler

Insider

First SEC filing: May 17, 2024 · Latest: May 17, 2024

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.
Initial holdings The stakes this person held when they first started reporting.
Compensation Executive pay disclosed in company proxy statements.

Insider at

SYNA selling Nov. 20, 2023

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 37 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

37 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Feb. 17, 2024	SYNA	F	1,940	$106.32	$206,261	45,231 Direct	-4.11%	Disposed	-7.2% (price as of 2026-08-21)
Feb. 17, 2024	SYNA	A	1,064	—	—	47,171 Direct	+2.31%	Acquired	(price as of 2026-08-21)
Nov. 20, 2023	SYNA	S	504	$106.51	$53,681	46,107 Direct	-1.08%	Disposed	-7.4% (price as of 2026-08-21)
Nov. 20, 2023	SYNA	S	2,973	$105.71	$314,276	46,611 Direct	-6.00%	Disposed	-6.7% (price as of 2026-08-21)
Nov. 17, 2023	SYNA	F	1,847	$105.68	$195,191	49,584 Direct	-3.59%	Disposed	-6.7% (price as of 2026-08-21)
Nov. 17, 2023	SYNA	A	1,064	—	—	51,431 Direct	+2.11%	Acquired	(price as of 2026-08-21)
Oct. 21, 2023	SYNA	F	2,685	$90.43	$242,805	50,367 Direct	-5.06%	Disposed	9.1% (price as of 2026-08-21)
Aug. 17, 2023	SYNA	F	7,524	$88.71	$667,454	52,865 Direct	-12.46%	Disposed	11.2% (price as of 2026-08-21)
Aug. 17, 2023	SYNA	A	8,026	—	—	60,389 Direct	+15.33%	Acquired	(price as of 2026-08-21)
Aug. 17, 2023	SYNA	A	27,770	—	—	52,363 Direct	+112.92%	Acquired	(price as of 2026-08-21)
Aug. 8, 2023	SYNA	S	10,144	$91.17	$924,828	24,593 Direct	-29.20%	Disposed	8.2% (price as of 2026-08-21)
May 17, 2023	SYNA	F	804	$81.02	$65,140	34,737 Direct	-2.26%	Disposed	21.7% (price as of 2026-08-21)
May 17, 2023	SYNA	A	1,066	—	—	35,541 Direct	+3.09%	Acquired	(price as of 2026-08-21)
Feb. 21, 2023	SYNA	S 10b5-1	1,350	$119.36	$161,136	34,396 Direct	-3.78%	Disposed	-17.4% (price as of 2026-08-21)
Feb. 17, 2023	SYNA	F	855	$122.04	$104,344	35,746 Direct	-2.34%	Disposed	-19.2% (price as of 2026-08-21)
Feb. 17, 2023	SYNA	A	1,066	—	—	36,601 Direct	+3.00%	Acquired	(price as of 2026-08-21)
Nov. 18, 2022	SYNA	S 10b5-1	11,866	$102.52	$1,216,502	35,535 Direct	-25.03%	Disposed	-3.8% (price as of 2026-08-21)
Nov. 17, 2022	SYNA	F	836	$100.27	$83,826	47,401 Direct	-1.73%	Disposed	-1.6% (price as of 2026-08-21)
Nov. 17, 2022	SYNA	A	1,066	—	—	48,237 Direct	+2.26%	Acquired	(price as of 2026-08-21)
Oct. 31, 2022	SYNA	F	7,136	$88.60	$632,250	47,171 Direct	-13.14%	Disposed	11.3% (price as of 2026-08-21)
Oct. 31, 2022	SYNA	A	13,632	—	—	54,307 Direct	+33.51%	Acquired	(price as of 2026-08-21)
Oct. 21, 2022	SYNA	F	2,685	$88.55	$237,757	40,675 Direct	-6.19%	Disposed	11.4% (price as of 2026-08-21)
Sept. 30, 2022	SYNA	F	14,273	$99.01	$1,413,170	43,360 Direct	-24.77%	Disposed	-0.4% (price as of 2026-08-21)
Sept. 30, 2022	SYNA	A	27,265	—	—	57,633 Direct	+89.78%	Acquired	(price as of 2026-08-21)
Aug. 18, 2022	SYNA	S	12,000	$143.40	$1,720,800	30,209 Direct	-28.43%	Disposed	-31.2% (price as of 2026-08-21)
Aug. 17, 2022	SYNA	F	11,452	$138.12	$1,581,750	42,209 Direct	-21.34%	Disposed	-28.6% (price as of 2026-08-21)
Aug. 17, 2022	SYNA	A	17,306	—	—	53,661 Direct	+47.60%	Acquired	(price as of 2026-08-21)
Aug. 17, 2022	SYNA	A	9,704	—	—	36,355 Direct	+36.41%	Acquired	(price as of 2026-08-21)
May 9, 2022	SYNA	S 10b5-1	1,126	$155.61	$175,217	26,651 Direct	-4.05%	Disposed	-36.6% (price as of 2026-08-21)
Feb. 7, 2022	SYNA	S 10b5-1	1,448	$209.69	$303,631	27,735 Direct	-4.96%	Disposed	-53.0% (price as of 2026-08-21)
Nov. 8, 2021	SYNA	S 10b5-1	341	$250.00	$85,250	29,183 Direct	-1.15%	Disposed	-60.6% (price as of 2026-08-21)
Nov. 8, 2021	SYNA	S 10b5-1	871	$249.02	$216,896	29,524 Direct	-2.87%	Disposed	-60.4% (price as of 2026-08-21)
Nov. 8, 2021	SYNA	S 10b5-1	1,811	$246.80	$446,955	30,395 Direct	-5.62%	Disposed	-60.0% (price as of 2026-08-21)
Nov. 8, 2021	SYNA	S 10b5-1	3,983	$245.86	$979,260	32,206 Direct	-11.01%	Disposed	-59.9% (price as of 2026-08-21)
Nov. 8, 2021	SYNA	S 10b5-1	1,614	$244.43	$394,510	36,189 Direct	-4.27%	Disposed	-59.7% (price as of 2026-08-21)
Nov. 8, 2021	SYNA	S 10b5-1	400	$243.86	$97,544	37,803 Direct	-1.05%	Disposed	-59.6% (price as of 2026-08-21)
Nov. 8, 2021	SYNA	S 10b5-1	500	$242.50	$121,250	38,203 Direct	-1.29%	Disposed	-59.3% (price as of 2026-08-21)
Nov. 8, 2021	SYNA	S 10b5-1	310	$241.40	$74,834	38,703 Direct	-0.79%	Disposed	-59.1% (price as of 2026-08-21)
Oct. 31, 2021	SYNA	F	7,136	$194.57	$1,388,452	39,013 Direct	-15.46%	Disposed	-49.3% (price as of 2026-08-21)
Oct. 31, 2021	SYNA	A	13,632	—	—	46,149 Direct	+41.92%	Acquired	(price as of 2026-08-21)
Oct. 21, 2021	SYNA	F	2,685	$178.94	$480,454	32,517 Direct	-7.63%	Disposed	-44.9% (price as of 2026-08-21)
Sept. 30, 2021	SYNA	F	3,568	$179.73	$641,277	35,202 Direct	-9.20%	Disposed	-45.1% (price as of 2026-08-21)
Sept. 30, 2021	SYNA	A	6,816	—	—	38,770 Direct	+21.33%	Acquired	(price as of 2026-08-21)
Aug. 18, 2021	SYNA	S 10b5-1	853	$166.57	$142,084	31,749 Direct	-2.62%	Disposed	-40.8% (price as of 2026-08-21)
Aug. 18, 2021	SYNA	S 10b5-1	1,950	$165.38	$322,491	32,602 Direct	-5.64%	Disposed	-40.4% (price as of 2026-08-21)
Aug. 18, 2021	SYNA	S 10b5-1	450	$164.42	$73,989	34,522 Direct	-1.29%	Disposed	-40.0% (price as of 2026-08-21)
Aug. 17, 2021	SYNA	F	5,953	$167.74	$998,556	35,002 Direct	-14.54%	Disposed	-41.2% (price as of 2026-08-21)
Aug. 17, 2021	SYNA	A	8,786	—	—	40,955 Direct	+27.31%	Acquired	(price as of 2026-08-21)
Aug. 17, 2021	SYNA	A	6,392	—	—	32,169 Direct	+24.80%	Acquired	(price as of 2026-08-21)
Aug. 9, 2021	SYNA	S 10b5-1	750	$170.50	$127,875	25,777 Direct	-2.83%	Disposed	-42.2% (price as of 2026-08-21)
May 10, 2021	SYNA	S 10b5-1	1,050	$130.13	$136,636	26,527 Direct	-3.81%	Disposed	-24.2% (price as of 2026-08-21)
Feb. 8, 2021	SYNA	S 10b5-1	1,050	$119.92	$125,916	27,484 Direct	-3.68%	Disposed	-17.8% (price as of 2026-08-21)
Nov. 9, 2020	SYNA	S 10b5-1	200	$84.49	$16,898	28,534 Direct	-0.70%	Disposed	16.7% (price as of 2026-08-21)
Nov. 9, 2020	SYNA	S 10b5-1	2,233	$83.43	$186,299	28,734 Direct	-7.21%	Disposed	18.2% (price as of 2026-08-21)
Nov. 9, 2020	SYNA	S 10b5-1	1,942	$82.61	$160,429	30,967 Direct	-5.90%	Disposed	19.4% (price as of 2026-08-21)
Nov. 9, 2020	SYNA	S 10b5-1	2,939	$81.66	$239,999	32,909 Direct	-8.20%	Disposed	20.8% (price as of 2026-08-21)
Oct. 31, 2020	SYNA	F	7,137	$76.67	$547,194	35,848 Direct	-16.60%	Disposed	28.6% (price as of 2026-08-21)
Oct. 31, 2020	SYNA	A	13,634	—	—	42,985 Direct	+46.45%	Acquired	(price as of 2026-08-21)
Oct. 21, 2020	SYNA	F	2,685	$78.98	$212,061	29,351 Direct	-8.38%	Disposed	24.9% (price as of 2026-08-21)
Oct. 7, 2020	SYNA	F	3,568	$81.66	$291,363	32,036 Direct	-10.02%	Disposed	20.8% (price as of 2026-08-21)
Oct. 7, 2020	SYNA	A	6,817	—	—	35,604 Direct	+23.68%	Acquired	(price as of 2026-08-21)
Aug. 17, 2020	SYNA	A	7,764	—	—	28,487 Direct	+37.47%	Acquired	(price as of 2026-08-21)
Oct. 21, 2019	SYNA	A	20,517	—	—	20,517 Direct	—	Acquired	(price as of 2026-08-21)

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.

Initial ownership (Form 3) 3 holdings

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

Date	Ticker	Security	Shares	Ownership
May 17, 2024	SLAB	Common Stock, $0.0001 par value	0	Direct
May 13, 2022	PXLW	Common Stock	30,000	Direct
Oct. 22, 2019	SYNA	No securities are beneficially owned.	0	Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

SYNA

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2024	$344,773	—	$6,603,695	—	—	—	$5,175	$6,953,643
2023	$435,000	—	$5,654,284	—	$174,218	—	$6,311	$6,269,813
2022	$400,000	—	$4,093,109	—	$480,000	—	$5,388	$4,978,497

SLAB

CFO

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2025	$475,000	$500,000	—	—	$489,250	—	$11,328	$5,079,105
2024	$297,789	$500,000	—	—	—	—	$91,426	$6,142,410

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.