Walter Siegel

CIK 1342060 · View on SEC EDGAR ↗

Insider

First SEC filing: Oct. 11, 2013 · Latest: Oct. 11, 2013

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 + 45 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

45 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 20, 2026	MSM	A	2,013	—	—	2,013 Direct	—	Acquired	(price as of 2026-08-21)
March 14, 2025	HSIC	D	3,998	—	—	43,191 Direct	-8.47%	Disposed	(price as of 2026-08-21)
March 10, 2025	HSIC	A	9,609	—	—	47,189 Direct	+25.57%	Acquired	(price as of 2026-08-21)
March 3, 2025	HSIC	F	1,946	$70.81	$137,796	37,580 Direct	-4.92%	Disposed	24.8% (price as of 2026-08-21)
June 6, 2024	HSIC	S 10b5-1	4,134	$69.47	$287,189	39,526 Direct	-9.47%	Disposed	27.2% (price as of 2026-08-21)
March 4, 2024	HSIC	A	9,441	—	—	43,660 Direct	+27.59%	Acquired	(price as of 2026-08-21)
March 1, 2024	HSIC	F	1,518	$76.88	$116,704	34,219 Direct	-4.25%	Disposed	15.0% (price as of 2026-08-21)
June 5, 2023	HSIC	S 10b5-1	5,497	$74.07	$407,163	35,737 Direct	-13.33%	Disposed	19.3% (price as of 2026-08-21)
March 6, 2023	HSIC	S 10b5-1	5,000	$78.62	$393,100	41,234 Direct	-10.81%	Disposed	12.4% (price as of 2026-08-21)
March 3, 2023	HSIC	F	1,805	$78.90	$142,414	46,234 Direct	-3.76%	Disposed	12.0% (price as of 2026-08-21)
March 3, 2023	HSIC	F	842	$78.90	$66,434	48,039 Direct	-1.72%	Disposed	12.0% (price as of 2026-08-21)
March 3, 2023	HSIC	F	2,939	$78.90	$231,887	48,881 Direct	-5.67%	Disposed	12.0% (price as of 2026-08-21)
March 3, 2023	HSIC	A	2,683	—	—	51,820 Direct	+5.46%	Acquired	(price as of 2026-08-21)
March 1, 2023	HSIC	A	9,015	—	—	49,137 Direct	+22.47%	Acquired	(price as of 2026-08-21)
May 6, 2022	HSIC	S 10b5-1	15,070	$82.97	$1,250,358	40,122 Direct	-27.30%	Disposed	6.5% (price as of 2026-08-21)
March 16, 2022	HSIC	A	8,565	—	—	8,565 Direct	—	Acquired	(price as of 2026-08-21)
March 16, 2022	HSIC	A	10,663	—	—	55,192 Direct	+23.95%	Acquired	(price as of 2026-08-21)
March 4, 2022	HSIC	F	3,175	$86.98	$276,162	44,529 Direct	-6.66%	Disposed	1.6% (price as of 2026-08-21)
March 4, 2022	HSIC	D	282	—	—	47,704 Direct	-0.59%	Disposed	(price as of 2026-08-21)
March 3, 2022	HSIC	F	842	$87.24	$73,456	47,986 Direct	-1.72%	Disposed	1.3% (price as of 2026-08-21)
March 2, 2022	HSIC	F	1,687	$85.75	$144,660	48,828 Direct	-3.34%	Disposed	3.1% (price as of 2026-08-21)
May 6, 2021	HSIC	S 10b5-1	2,257	$78.27	$176,655	50,515 Direct	-4.28%	Disposed	12.9% (price as of 2026-08-21)
March 5, 2021	HSIC	F	1,352	$62.57	$84,595	52,772 Direct	-2.50%	Disposed	41.2% (price as of 2026-08-21)
March 3, 2021	HSIC	A	13,017	—	—	13,017 Direct	—	Acquired	(price as of 2026-08-21)
March 3, 2021	HSIC	A	4,674	—	—	54,124 Direct	+9.45%	Acquired	(price as of 2026-08-21)
March 3, 2021	HSIC	A	5,262	—	—	49,450 Direct	+11.91%	Acquired	(price as of 2026-08-21)
March 2, 2021	HSIC	D	6,802	—	—	44,818 Direct	-13.18%	Disposed	(price as of 2026-08-21)
March 2, 2021	HSIC	F	630	$62.92	$39,640	44,188 Direct	-1.41%	Disposed	40.5% (price as of 2026-08-21)
June 5, 2020	HSIC	S 10b5-1	1,149	$65.00	$74,685	51,620 Direct	-2.18%	Disposed	36.0% (price as of 2026-08-21)
March 6, 2020	HSIC	F	2,087	$57.69	$120,399	52,769 Direct	-3.80%	Disposed	53.2% (price as of 2026-08-21)
March 6, 2020	HSIC	D	1,161	—	—	54,856 Direct	-2.07%	Disposed	(price as of 2026-08-21)
March 4, 2020	HSIC	F	942	$61.63	$58,055	56,017 Direct	-1.65%	Disposed	43.4% (price as of 2026-08-21)
March 3, 2020	HSIC	A	8,256	—	—	56,959 Direct	+16.95%	Acquired	(price as of 2026-08-21)
June 17, 2019	HSIC	S 10b5-1	4,068	$71.29	$290,008	48,703 Direct	-7.71%	Disposed	24.0% (price as of 2026-08-21)
March 5, 2019	HSIC	A	12,008	—	—	52,771 Direct	+29.46%	Acquired	(price as of 2026-08-21)
March 4, 2019	HSIC	F	843	$59.76	$50,378	40,763 Direct	-2.03%	Disposed	47.9% (price as of 2026-08-21)
March 4, 2019	HSIC	D	2,404	—	—	41,606 Direct	-5.46%	Disposed	(price as of 2026-08-21)
March 1, 2019	HSIC	F	1,433	$60.07	$86,080	44,010 Direct	-3.15%	Disposed	47.1% (price as of 2026-08-21)
March 2, 2018	HSIC	A	10,354	—	—	39,709 Direct	+35.27%	Acquired	(price as of 2026-08-21)
March 2, 2018	HSIC	A	480	—	—	40,189 Direct	+1.21%	Acquired	(price as of 2026-08-21)
March 2, 2018	HSIC	F	2,197	$65.19	$143,222	37,992 Direct	-5.47%	Disposed	72.9% (price as of 2026-08-21)
Feb. 27, 2018	HSIC	F	543	$67.21	$36,495	29,355 Direct	-1.82%	Disposed	67.7% (price as of 2026-08-21)
Dec. 13, 2017	HSIC	F	230	$68.70	$15,801	29,898 Direct	-0.76%	Disposed	64.0% (price as of 2026-08-21)
March 6, 2017	HSIC	A	4,388	—	—	15,064 Direct	+41.10%	Acquired	(price as of 2026-08-21)
Feb. 27, 2017	HSIC	F	1,011	$173.54	$175,449	10,676 Direct	-8.65%	Disposed	29.9% (price as of 2026-08-21)
Feb. 27, 2017	HSIC	A	1,325	—	—	11,687 Direct	+12.79%	Acquired	(price as of 2026-08-21)
Dec. 13, 2016	HSIC	D	22	—	—	10,568 Direct	-0.21%	Disposed	(price as of 2026-08-21)
Dec. 13, 2016	HSIC	F	206	$153.49	$31,619	10,362 Direct	-1.95%	Disposed	46.8% (price as of 2026-08-21)
March 4, 2016	HSIC	A	2,976	—	—	10,590 Direct	+39.09%	Acquired	(price as of 2026-08-21)
March 3, 2015	HSIC	A	4,617	—	—	7,614 Direct	+154.05%	Acquired	(price as of 2026-08-21)
Feb. 27, 2014	HSIC	A	2,105	—	—	2,997 Direct	+235.99%	Acquired	(price as of 2026-08-21)
Dec. 13, 2013	HSIC	A	892	—	—	892 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.

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
July 20, 2026	MSM	Restricted Stock Units (RSU)	Class A Common Stock, $0.001 par value (2,013)	—	—	2,013	Acquired
March 16, 2022	HSIC	Stock Option (Right to Buy) [F2]	Common Stock, par value $0.01 per share (8,565)	$86.27	March 16, 2032	8,565	Acquired
March 3, 2021	HSIC	Stock Option (Right to Buy) [F3]	Common Stock, par value $0.01 per share (13,017)	$62.71	March 3, 2031	13,017	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
July 20, 2026	MSM	Class A Common Stock, $0.001 par value	0	Direct
Oct. 11, 2013	HSIC	Common Stock, par value $0.01 per share	0	Direct