William P Noglows

CIK 1201094 · View on SEC EDGAR ↗

Insider

First SEC filing: June 8, 2026 · Latest: June 8, 2026

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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 + 96 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

96 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 23, 2026	ASPN	M	14,799	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
June 23, 2026	ASPN	M	14,799	$4.75	$70,295	114,156 Direct	+14.89%	Acquired	13.7% (price as of 2026-08-20)
June 4, 2026	LFUS	A	3	$480.24	$1,441	22,182 Direct	+0.01%	Acquired	-14.9% (price as of 2026-08-20)
June 4, 2026	LFUS	A	3	$480.24	$1,441	22,179 Direct	+0.01%	Acquired	-14.9% (price as of 2026-08-20)
May 13, 2026	ASPN	A	8,706	—	—	8,706 Direct	—	Acquired	(price as of 2026-08-20)
May 13, 2026	ASPN	A	10,370	—	—	99,357 Direct	+11.65%	Acquired	(price as of 2026-08-20)
April 22, 2026	LFUS	A	482	—	—	22,176 Direct	+2.22%	Acquired	(price as of 2026-08-20)
March 5, 2026	LFUS	A	2	$323.58	$647	21,694 Direct	+0.01%	Acquired	26.3% (price as of 2026-08-20)
March 5, 2026	LFUS	A	7	$323.58	$2,265	21,692 Direct	+0.03%	Acquired	26.3% (price as of 2026-08-20)
Feb. 4, 2026	LFUS	M	911	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 4, 2026	LFUS	M	911	$199.24	$181,508	21,685 Direct	+4.39%	Acquired	105.1% (price as of 2026-08-20)
Dec. 5, 2025	LFUS	A	8	$258.99	$2,072	20,774 Direct	+0.04%	Acquired	57.8% (price as of 2026-08-20)
Dec. 5, 2025	LFUS	A	3	$258.99	$777	20,766 Direct	+0.01%	Acquired	57.8% (price as of 2026-08-20)
Sept. 5, 2025	LFUS	A	3	$259.58	$779	20,763 Direct	+0.01%	Acquired	57.4% (price as of 2026-08-20)
Sept. 5, 2025	LFUS	A	8	$259.58	$2,077	20,760 Direct	+0.04%	Acquired	57.4% (price as of 2026-08-20)
June 5, 2025	LFUS	A	9	$214.18	$1,928	20,752 Direct	+0.04%	Acquired	90.8% (price as of 2026-08-20)
June 5, 2025	LFUS	A	3	$214.18	$643	20,743 Direct	+0.01%	Acquired	90.8% (price as of 2026-08-20)
April 30, 2025	ASPN	A	9,105	—	—	9,105 Direct	—	Acquired	(price as of 2026-08-20)
April 30, 2025	ASPN	A	10,370	—	—	88,987 Direct	+13.19%	Acquired	(price as of 2026-08-20)
April 24, 2025	LFUS	A	1,019	—	—	20,740 Direct	+5.17%	Acquired	(price as of 2026-08-20)
March 7, 2025	LFUS	J	7	$218.33	$1,528	19,721 Direct	+0.04%	Acquired	87.1% (price as of 2026-08-20)
Feb. 4, 2025	LFUS	M	800	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 4, 2025	LFUS	M	800	$192.59	$154,072	19,714 Direct	+4.23%	Acquired	112.2% (price as of 2026-08-20)
Dec. 6, 2024	LFUS	J	8	$247.32	$1,979	18,914 Direct	+0.04%	Acquired	65.2% (price as of 2026-08-20)
Sept. 6, 2024	LFUS	J	7	$256.00	$1,792	18,906 Direct	+0.04%	Acquired	59.6% (price as of 2026-08-20)
June 7, 2024	LFUS	J	5	$250.13	$1,251	18,899 Direct	+0.03%	Acquired	63.3% (price as of 2026-08-20)
May 30, 2024	ASPN	A	1,657	—	—	1,657 Direct	—	Acquired	(price as of 2026-08-20)
May 30, 2024	ASPN	A	0	—	—	10,000 Indirect	0.00%	Acquired	(price as of 2026-08-20)
May 30, 2024	ASPN	A	0	—	—	10,000 Indirect	0.00%	Acquired	(price as of 2026-08-20)
May 30, 2024	ASPN	A	1,898	—	—	78,617 Direct	+2.47%	Acquired	(price as of 2026-08-20)
April 25, 2024	LFUS	A	768	—	—	768 Direct	—	Acquired	(price as of 2026-08-20)
April 25, 2024	LFUS	A	522	—	—	18,894 Direct	+2.84%	Acquired	(price as of 2026-08-20)
March 8, 2024	LFUS	J	7	$244.90	$1,714	18,372 Direct	+0.04%	Acquired	66.8% (price as of 2026-08-20)
Jan. 9, 2024	LFUS	M	945	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 9, 2024	LFUS	M	945	$154.15	$145,672	18,365 Direct	+5.42%	Acquired	165.1% (price as of 2026-08-20)
Dec. 8, 2023	LFUS	J	8	$243.04	$1,944	17,420 Direct	+0.05%	Acquired	68.1% (price as of 2026-08-20)
Sept. 8, 2023	LFUS	J	7	$259.49	$1,816	17,412 Direct	+0.04%	Acquired	57.5% (price as of 2026-08-20)
June 9, 2023	LFUS	J	6	$271.09	$1,627	17,405 Direct	+0.03%	Acquired	50.7% (price as of 2026-08-20)
June 1, 2023	ASPN	A	7,712	—	—	7,712 Direct	—	Acquired	(price as of 2026-08-20)
June 1, 2023	ASPN	A	7,488	—	—	76,719 Direct	+10.82%	Acquired	(price as of 2026-08-20)
April 27, 2023	LFUS	A	718	—	—	718 Direct	—	Acquired	(price as of 2026-08-20)
April 27, 2023	LFUS	A	468	—	—	17,399 Direct	+2.76%	Acquired	(price as of 2026-08-20)
June 2, 2022	ASPN	A	3,178	—	—	3,178 Direct	—	Acquired	(price as of 2026-08-20)
June 2, 2022	ASPN	A	2,699	—	—	69,231 Direct	+4.06%	Acquired	(price as of 2026-08-20)
June 1, 2021	ASPN	A	3,088	—	—	3,088 Direct	—	Acquired	(price as of 2026-08-20)
June 1, 2021	ASPN	A	2,489	—	—	86,532 Direct	+2.96%	Acquired	(price as of 2026-08-20)
June 18, 2020	ASPN	A	9,817	—	—	9,817 Direct	—	Acquired	(price as of 2026-08-20)
June 18, 2020	ASPN	A	7,511	—	—	84,043 Direct	+9.81%	Acquired	(price as of 2026-08-20)
June 19, 2019	ASPN	A	11,950	—	—	11,950 Direct	—	Acquired	(price as of 2026-08-20)
June 19, 2019	ASPN	A	8,388	—	—	76,532 Direct	+12.31%	Acquired	(price as of 2026-08-20)
June 20, 2018	ASPN	A	13,517	—	—	13,517 Direct	—	Acquired	(price as of 2026-08-20)
June 20, 2018	ASPN	A	9,677	—	—	68,144 Direct	+16.55%	Acquired	(price as of 2026-08-20)
June 8, 2018	LFUS	L	4	$225.53	$902	20,948 Direct	+0.02%	Acquired	81.2% (price as of 2026-08-20)
April 27, 2018	LFUS	A	800	—	—	800 Direct	—	Acquired	(price as of 2026-08-20)
April 27, 2018	LFUS	A	468	—	—	20,944 Direct	+2.29%	Acquired	(price as of 2026-08-20)
March 13, 2018	LFUS	L	2	$224.72	$449	20,476 Direct	+0.01%	Acquired	81.8% (price as of 2026-08-20)
Jan. 24, 2018	LFUS	M	1,763	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 24, 2018	LFUS	M	1,763	$62.21	$109,676	20,474 Direct	+9.42%	Acquired	556.8% (price as of 2026-08-20)
Dec. 8, 2017	LFUS	L	5	$197.18	$986	18,711 Direct	+0.03%	Acquired	107.2% (price as of 2026-08-20)
Sept. 11, 2017	LFUS	L	5	$186.59	$933	18,706 Direct	+0.03%	Acquired	119.0% (price as of 2026-08-20)
June 14, 2017	ASPN	A	17,019	—	—	17,019 Direct	—	Acquired	(price as of 2026-08-20)
June 14, 2017	ASPN	A	12,289	—	—	58,467 Direct	+26.61%	Acquired	(price as of 2026-08-20)
June 9, 2017	LFUS	L	5	$167.85	$839	18,701 Direct	+0.03%	Acquired	143.4% (price as of 2026-08-20)
April 28, 2017	LFUS	A	505	—	—	18,696 Direct	+2.78%	Acquired	(price as of 2026-08-20)
April 28, 2017	LFUS	A	945	—	—	945 Direct	—	Acquired	(price as of 2026-08-20)
Feb. 17, 2017	LFUS	M	1,724	$42.13	$72,632	19,908 Direct	+9.48%	Acquired	869.8% (price as of 2026-08-20)
Feb. 17, 2017	LFUS	S	1,724	$163.00	$281,012	18,184 Direct	-8.66%	Disposed	150.7% (price as of 2026-08-20)
Feb. 17, 2017	LFUS	M	1,724	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 12, 2016	LFUS	L	5	$155.92	$780	18,184 Direct	+0.03%	Acquired	162.0% (price as of 2026-08-20)
Sept. 14, 2016	LFUS	A	7	$121.92	$853	18,179 Direct	+0.04%	Acquired	235.1% (price as of 2026-08-20)
Aug. 24, 2016	ASPN	P	20,000	$4.98	$99,600	46,178 Direct	+76.40%	Acquired	8.4% (price as of 2026-08-20)
June 24, 2016	ASPN	A	14,799	—	—	14,799 Direct	—	Acquired	(price as of 2026-08-20)
June 24, 2016	ASPN	A	10,736	—	—	26,178 Direct	+69.52%	Acquired	(price as of 2026-08-20)
June 23, 2016	LFUS	A	7	$117.93	$826	18,172 Direct	+0.04%	Acquired	246.5% (price as of 2026-08-20)
April 22, 2016	LFUS	A	1,200	—	—	1,200 Direct	—	Acquired	(price as of 2026-08-20)
April 22, 2016	LFUS	A	671	—	—	18,165 Direct	+3.84%	Acquired	(price as of 2026-08-20)
March 18, 2016	LFUS	A	3	$124.02	$372	17,494 Direct	+0.02%	Acquired	229.4% (price as of 2026-08-20)
Dec. 8, 2015	LFUS	A	7	$106.99	$749	17,491 Direct	+0.04%	Acquired	281.9% (price as of 2026-08-20)
Nov. 24, 2015	LFUS	M	4,213	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 24, 2015	LFUS	S	4,213	$109.28	$460,397	17,484 Direct	-19.42%	Disposed	273.9% (price as of 2026-08-20)
Nov. 24, 2015	LFUS	M	4,213	$13.88	$58,476	21,697 Direct	+24.10%	Acquired	2843.7% (price as of 2026-08-20)
Oct. 23, 2015	LFUS	A	219	$91.12	$19,955	17,484 Direct	+1.27%	Acquired	348.4% (price as of 2026-08-20)
Sept. 4, 2015	LFUS	A	8	$88.98	$712	17,265 Direct	+0.05%	Acquired	359.2% (price as of 2026-08-20)
July 24, 2015	LFUS	A	221	$90.42	$19,983	17,257 Direct	+1.30%	Acquired	351.9% (price as of 2026-08-20)
June 17, 2015	ASPN	A	10,228	—	—	10,228 Direct	—	Acquired	(price as of 2026-08-20)
June 17, 2015	ASPN	A	7,715	—	—	15,442 Direct	+99.84%	Acquired	(price as of 2026-08-20)
June 5, 2015	LFUS	A	4	$96.09	$384	17,036 Direct	+0.02%	Acquired	325.2% (price as of 2026-08-20)
June 5, 2015	LFUS	A	2	$95.45	$191	17,032 Direct	+0.01%	Acquired	328.1% (price as of 2026-08-20)
May 8, 2015	LFUS	A	2	$97.74	$195	17,030 Direct	+0.01%	Acquired	318.0% (price as of 2026-08-20)
April 24, 2015	LFUS	A	213	$96.15	$20,480	17,028 Direct	+1.27%	Acquired	324.9% (price as of 2026-08-20)
April 24, 2015	LFUS	A	1,447	—	—	1,447 Direct	—	Acquired	(price as of 2026-08-20)
April 24, 2015	LFUS	A	760	—	—	16,815 Direct	+4.73%	Acquired	(price as of 2026-08-20)
Feb. 11, 2015	LFUS	M	2,415	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 11, 2015	LFUS	S	957	$93.03	$89,030	16,055 Direct	-5.63%	Disposed	339.2% (price as of 2026-08-20)
Feb. 11, 2015	LFUS	M	2,415	$36.33	$87,737	17,012 Direct	+16.54%	Acquired	1024.6% (price as of 2026-08-20)
Jan. 30, 2015	LFUS	A	202	$97.23	$19,640	14,597 Direct	+1.40%	Acquired	320.2% (price as of 2026-08-20)
Dec. 5, 2014	LFUS	A	5	$98.87	$494	14,395 Direct	+0.03%	Acquired	313.2% (price as of 2026-08-20)
Oct. 24, 2014	LFUS	A	232	$86.14	$19,984	14,390 Direct	+1.64%	Acquired	374.3% (price as of 2026-08-20)
Sept. 5, 2014	LFUS	A	4	$92.21	$369	14,158 Direct	+0.03%	Acquired	343.1% (price as of 2026-08-20)
July 25, 2014	LFUS	A	225	$88.94	$20,012	14,154 Direct	+1.62%	Acquired	359.4% (price as of 2026-08-20)

Showing latest 100 of 130 transactions

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
June 23, 2026	ASPN	Stock Options (Right to Buy)	Common Stock (14,799)	$4.75	June 24, 2026	14,799	Disposed
May 13, 2026	ASPN	Stock Options (Right to Buy)	Common Stock (8,706)	$5.40	May 13, 2036	8,706	Acquired
Feb. 4, 2026	LFUS	Stock Option (right to buy)	Common Stock (911)	$199.24	April 26, 2026	911	Disposed
April 30, 2025	ASPN	Stock Options (Right to Buy)	Common Stock (9,105)	$5.40	April 30, 2035	9,105	Acquired
Feb. 4, 2025	LFUS	Stock Option (right to buy)	Common Stock (800)	$192.59	April 27, 2025	800	Disposed
May 30, 2024	ASPN	Stock Options (Right to Buy)	Common Stock (1,657)	$29.50	May 30, 2034	1,657	Acquired
April 25, 2024	LFUS	Stock Option (right to buy)	Common Stock (768)	$230.39	April 25, 2031	768	Acquired
Jan. 9, 2024	LFUS	Stock Option (right to buy)	Common Stock (945)	$154.15	April 28, 2024	945	Disposed
June 1, 2023	ASPN	Stock Option (Right-to-Buy)	Common Stock (7,712)	$6.81	June 1, 2033	7,712	Acquired
April 27, 2023	LFUS	Stock Option (right to buy)	Common Stock (718)	$240.76	April 27, 2030	718	Acquired
June 2, 2022	ASPN	Stock Option (Right-to-Buy)	Common Stock (3,178)	$18.89	June 2, 2032	3,178	Acquired
June 1, 2021	ASPN	Stock Option (Right-to-Buy)	Common Stock (3,088)	$20.49	June 1, 2031	3,088	Acquired
June 18, 2020	ASPN	Stock Option (right to buy)	Common Stock (9,817)	$6.79	June 18, 2030	9,817	Acquired
June 19, 2019	ASPN	Stock Option (right to buy)	Common Stock (11,950)	$6.08	June 19, 2029	11,950	Acquired
June 20, 2018	ASPN	Common Stock (right to buy)	Common Stock (13,517)	$5.27	June 20, 2028	13,517	Acquired
April 27, 2018	LFUS	Stock Option (right to buy)	Common Stock (800)	$192.59	April 27, 2025	800	Acquired
Jan. 24, 2018	LFUS	Stock Option (right to buy)	Common Stock (1,763)	$62.21	April 29, 2018	1,763	Disposed
June 14, 2017	ASPN	Stock Option (right to buy)	Common Stock (17,019)	$4.15	June 14, 2027	17,019	Acquired
April 28, 2017	LFUS	Stock Option (right to buy)	Common Stock (945)	$154.15	April 28, 2024	945	Acquired
Feb. 17, 2017	LFUS	Stock option (right to buy)	Common Stock (1,724)	$42.13	April 30, 2017	1,724	Disposed
June 24, 2016	ASPN	Stock Option (right to buy)	Common Stock (14,799)	$4.75	June 24, 2026	14,799	Acquired
April 22, 2016	LFUS	Stock option (right to buy)	Common stock (1,200)	$120.15	April 22, 2023	1,200	Acquired
Nov. 24, 2015	LFUS	Stock option (right to buy)	Common stock (4,213)	$13.88	April 24, 2016	4,213	Disposed
June 17, 2015	ASPN	Stock Option (right to buy)	Common Stock (10,228)	$6.61	June 17, 2025	10,228	Acquired
April 24, 2015	LFUS	Stock option (right to buy)	Common stock (1,447)	$96.15	April 25, 2022	1,447	Acquired
Feb. 11, 2015	LFUS	Stock option (right to buy)	Common stock (2,415)	$36.33	April 25, 2015	2,415	Disposed
April 25, 2014	LFUS	Stock option (right to buy)	Common stock (1,350)	$94.84	April 25, 2021	1,350	Acquired
Feb. 24, 2014	LFUS	Stock option (right to buy)	Common stock (1,971)	$41.22	April 27, 2014	1,971	Disposed
April 26, 2013	LFUS	Stock option (right to buy)	Common stock (1,716)	$66.68	April 26, 2020	1,716	Acquired
April 27, 2012	LFUS	Stock Option (Right to Buy)	Common Stock (1,648)	$63.09	April 27, 2019	1,648	Acquired
April 29, 2011	LFUS	Stock Option (Right to Buy)	Common Stock (1,763)	$62.21	April 29, 2018	1,763	Acquired
April 30, 2010	LFUS	Stock Option (Right to Buy)	Common Stock (1,724)	$42.13	April 30, 2017	1,724	Acquired
April 24, 2009	LFUS	Stock Option (Right to Buy)	Common Stock (4,213)	$13.88	April 24, 2016	4,213	Acquired
April 25, 2008	LFUS	Stock Option (Right to Buy)	Common Stock (2,415)	$36.33	April 25, 2015	2,415	Acquired
April 27, 2007	LFUS	Stock Option (Right to Buy)	Common Stock (1,971)	$41.22	April 27, 2014	1,971	Acquired

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

Initial ownership (Form 3) 2 holdings

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

Date	Ticker	Security	Shares	Ownership
June 20, 2014	ASPN	Stock Option (right to buy)→ Common Stock (18)	18	Direct
June 20, 2014	ASPN	Stock Option (right to buy)→ Common Stock (3)	3	Direct