SEC ownership of STERIS plc

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001757898.

Comparable stake leader

VANGUARD CAPITAL MANAGEMENT LLC

Disclosed value leader

BlackRock, Inc.

Comparable rows

50/50

Latest evidence

31 Mar 2026

Top shareholders Insider holders Latest transactions

Public ticker: STE on NYSE
Parsed ownership sources: 13D/G and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder: VANGUARD CAPITAL MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
Comparable ownership rows: 50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder: VANGUARD CAPITAL MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date: 31 Mar 2026
Freshness: Most recent filing date in this holder set
Issuer CIK: 0001757898
Issuer location: Dublin, Ireland

Ownership snapshot

Top shareholders of STERIS plc (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

VANGUARD CAPITAL MANAGEME...

Disclosed value leader

BlackRock, Inc.

Comparable rows

50/50

Latest evidence

31 Mar 2026

13D/G 13F Lead comparable stake: 7.5% 13D/G row: VANGUARD CAPITAL MANAGEMENT LLC Showing 1-8 of 50 holder rows.

Quick read

VANGUARD CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 7.5%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens VANGUARD CAPITAL MANAGEMENT LLC's linked filing trail.

Comparable ownership Top 5

VANGUARD CAPITAL MANAGEMENT LLC 7.5%

STATE STREET CORP 5.1%

VANGUARD PORTFOLIO MANAGEMENT LLC 5%

MASSACHUSETTS FINANCIAL SERVICES ... 4.9%

BlackRock, Inc. 9.2%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
VANGUARD CAPITAL MANAGEMENT LLC	13D/G 13F Vanguard Capital Management · Company 13D/G 13F	7.5%	$1,623,146,387 7,340,236 shares	$0	31 Mar 2026
STATE STREET CORP	13D/G 13F STATE STREET CORPORATION · Company 13D/G 13F	5.1%	$1,104,601,623 4,995,259 shares	$0	31 Mar 2026
VANGUARD PORTFOLIO MANAGEMENT LLC	13D/G 13F Vanguard Portfolio Management · Company 13D/G 13F	5%	$1,097,251,040 4,962,018 shares	$0	31 Mar 2026
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13D/G 13F Massachusetts Financial Services Company · Company 13D/G 13F	4.9%	$1,199,124,923 4,846,124 shares	$0	30 Sep 2025
BlackRock, Inc.	13F Company 13F	9.2%	$1,996,056,667 9,026,621 shares	—	31 Mar 2026
MORGAN STANLEY	13F Company 13F	4.5%	$971,703,958 4,394,263 shares	—	31 Mar 2026
WELLINGTON MANAGEMENT GROUP LLP	13F Company 13F	2.9%	$635,387,204 2,873,365 shares	—	31 Mar 2026
Orbis Allan Gray Ltd	13F Company 13F	2.6%	$573,370,630 2,592,912 shares	—	31 Mar 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$13,460,553.

Buys

Insiders: 0

Sells

$13,460,553

Insiders: 8

Net

-$13,460,553

Shares: -54,338

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 0 Shares: 54,338

Window (months)	Sell shares	Buy value	Sell value	Net value
0-3	7,328	$0	$1,554,051	-$1,554,051
3-6	3,098	$0	$734,877	-$734,877
6-9	25,203	$0	$6,624,685	-$6,624,685
9-12	18,709	$0	$4,546,940	-$4,546,940

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 23 reporting-owner rows connected to STERIS plc. Open a relationship link for the CIK-to-CIK filing trail.

Rows

Largest Forms 3/4/5 holder

Richard C. Breeden

Net 12M change

-$13,460,553

Latest report

15 Jun 2026

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
Richard C. Breeden	Director	$19,077,349	-$310,284	-1.6%	Mixed	02 Jun 2026
Daniel A. Carestio	President and CEO, Director	$13,493,164	-$985,248	-6.8%	Filing P/S	04 Jun 2026
Michael J. Tokich	Sr. Vice Pres., CFO	$11,440,139			Mixed	04 Jun 2025
Jacqueline B. Kosecoff	Director	$7,961,064			Mixed	08 Aug 2024
Mohsen Sohi	Director	$7,480,046	-$994,456	-12%	Mixed	08 Aug 2025
John Adam Zangerle	Sr. VP, Gen Counsel, and Sec.	$7,379,003	-$4,274,068	-37%	Filing P/S	15 Jun 2026
Cynthia L. Feldmann	Director	$4,232,757	-$1,579,129	-27%	Mixed	05 Mar 2026
Cary L. Majors	SVP and President, Healthcare	$3,848,766			Median	02 Jun 2026
Mary Clare Fraser	SVP & Chief HRO	$3,033,019			Median	04 Jun 2026
Karen L. Burton	Sr. Vice Pres., CFO	$2,915,377	-$1,909,667	-40%	Median	04 Jun 2026
Julia Madsen	Sr. VP and GM, Life Sciences	$2,710,390	-$1,312,096	-33%	Median	04 Jun 2026
Kenneth E. Kohler	Svp & Gm, Ast	$2,505,845			Median	04 Jun 2026
Richard Martin Steeves	Director	$2,305,692			Mixed	08 Aug 2024
David B. Lewis	Director	$1,642,981			Mixed	21 Jul 2021
Nirav R. Shah	Director	$1,560,367			Mixed	08 Aug 2025
Andrew Xilas	SVP and GM, Dental	$1,414,619			Mixed	31 May 2024
Renato Tamaro	V.P. & Corporate Treasurer	$1,369,679	-$2,095,605	-60%	Median	04 Jun 2026
Lindsey McGowan	VP, Chf. Comp. & Quality Offc.	$1,307,099			Median	02 Jun 2026
Paul Edward Martin	Director	$1,095,148			Mixed	08 Aug 2025
Esther M. Alegria	Director	$543,230			Mixed	08 Aug 2025

Recent insider transactions for STERIS plc

Showing up to 300 recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	SEC-reported value	SEC-reported price	Shares	Shares owned	Date	Ownership
John Adam Zangerle	STE	Ordinary Shares	Sale	-3.87%	$296,968	$209.28	-1,419	35,259	15 Jun 2026	Direct
Daniel A. Carestio	STE	Ordinary Shares	Sale	-2.11%	$291,288	$212.00	-1,374	63,647	05 Jun 2026	Direct
John Adam Zangerle	STE	Ordinary Shares	Tax liability	-1.08%			-401	36,678	04 Jun 2026	Direct
Renato Tamaro	STE	Ordinary Shares	Tax liability	-1.04%			-65	6,194	04 Jun 2026	Direct
Julia Madsen	STE	Ordinary Shares	Tax liability	-1.57%			-195	12,257	04 Jun 2026	Direct
Kenneth E. Kohler	STE	Ordinary Shares	Tax liability	-1.31%			-150	11,332	04 Jun 2026	Direct
Mary Clare Fraser	STE	Ordinary Shares	Tax liability	-4.19%			-600	13,716	04 Jun 2026	Direct
Daniel A. Carestio	STE	Ordinary Shares	Sale	-4.49%	$655,511	$214.64	-3,054	65,021	04 Jun 2026	Direct
Daniel A. Carestio	STE	Ordinary Shares	Tax liability	-2.7%			-1,889	68,075	04 Jun 2026	Direct
Karen L. Burton	STE	Ordinary Shares	Tax liability	-0.68%			-90	13,184	04 Jun 2026	Direct
John Adam Zangerle	STE	Ordinary Shares	Tax liability	-0.97%			-365	37,079	03 Jun 2026	Direct
Renato Tamaro	STE	Ordinary Shares	Tax liability	-1.01%			-64	6,259	03 Jun 2026	Direct
Julia Madsen	STE	Ordinary Shares	Tax liability	-1.88%			-239	12,452	03 Jun 2026	Direct
Kenneth E. Kohler	STE	Ordinary Shares	Tax liability	-1.58%			-184	11,482	03 Jun 2026	Direct
Mary Clare Fraser	STE	Ordinary Shares	Tax liability	-2.13%			-311	14,316	03 Jun 2026	Direct
Daniel A. Carestio	STE	Ordinary Shares	Tax liability	-3.61%			-2,619	69,964	03 Jun 2026	Direct
Karen L. Burton	STE	Ordinary Shares	Tax liability	-1.41%			-190	13,274	03 Jun 2026	Direct
John Adam Zangerle	STE	Ordinary Shares	Tax liability	-0.66%			-247	37,444	02 Jun 2026	Direct
John Adam Zangerle	STE	Ordinary Shares	Award	13.1%			4,359	37,691	02 Jun 2026	Direct
John Adam Zangerle	STE	Employee Stock Option (right to buy)	Award				15,200	15,200	02 Jun 2026	Direct
Renato Tamaro	STE	Ordinary Shares	Tax liability	-0.64%			-41	6,323	02 Jun 2026	Direct
Renato Tamaro	STE	Ordinary Shares	Award	13.4%			750	6,364	02 Jun 2026	Direct
Renato Tamaro	STE	Employee Stock Option (right to buy)	Award				2,620	2,620	02 Jun 2026	Direct
Lindsey McGowan	STE	Ordinary Shares	Tax liability	-5.5%			-329	5,656	02 Jun 2026	Direct
Lindsey McGowan	STE	Ordinary Shares	Award	23.9%			1,155	5,985	02 Jun 2026	Direct
Lindsey McGowan	STE	Employee Stock Option (right to buy)	Award				4,036	4,036	02 Jun 2026	Direct
Cary L. Majors	STE	Ordinary Shares	Tax liability	-0.38%			-67	17,338	02 Jun 2026	Direct
Cary L. Majors	STE	Ordinary Shares	Award	37.5%			4,746	17,405	02 Jun 2026	Direct
Cary L. Majors	STE	Employee Stock Option (right to buy)	Award				16,548	16,548	02 Jun 2026	Direct
Julia Madsen	STE	Ordinary Shares	Tax liability	-0.99%			-127	12,691	02 Jun 2026	Direct
Julia Madsen	STE	Ordinary Shares	Award	22%			2,316	12,818	02 Jun 2026	Direct
Julia Madsen	STE	Employee Stock Option (right to buy)	Award				8,080	8,080	02 Jun 2026	Direct
Kenneth E. Kohler	STE	Ordinary Shares	Tax liability	-0.56%			-66	11,666	02 Jun 2026	Direct
Kenneth E. Kohler	STE	Ordinary Shares	Award	23.1%			2,199	11,732	02 Jun 2026	Direct
Kenneth E. Kohler	STE	Employee Stock Option (right to buy)	Award				7,668	7,668	02 Jun 2026	Direct
Mary Clare Fraser	STE	Ordinary Shares	Tax liability	-3.88%			-591	14,627	02 Jun 2026	Direct
Mary Clare Fraser	STE	Ordinary Shares	Award	24.6%			3,009	15,218	02 Jun 2026	Direct
Mary Clare Fraser	STE	Employee Stock Option (right to buy)	Award				10,492	10,492	02 Jun 2026	Direct
Daniel A. Carestio	STE	Ordinary Shares	Tax liability	-1.35%			-995	72,583	02 Jun 2026	Direct
Daniel A. Carestio	STE	Ordinary Shares	Award	47.6%			23,736	73,578	02 Jun 2026	Direct
Daniel A. Carestio	STE	Employee Stock Option (right to buy)	Award				82,740	82,740	02 Jun 2026	Direct
Karen L. Burton	STE	Ordinary Shares	Options Exercise	-0.49%			-66	13,464	02 Jun 2026	Direct
Karen L. Burton	STE	Ordinary Shares	Award	64.9%			5,325	13,530	02 Jun 2026	Direct
Karen L. Burton	STE	Employee Stock Option (right to buy)	Award				18,564	18,564	02 Jun 2026	Direct
Pierre Boulud	STE	Career Restricted Stock Units	Award				367	367	02 Jun 2026	Direct
Richard C. Breeden	STE	Ordinary Shares	Sale	-3.66%	$310,284	$209.51	-1,481	38,964	02 Jun 2026	Direct
Richard C. Breeden	STE	Ordinary Shares	Options Exercise	10.3%			3,781	40,445	02 Jun 2026	Direct
Richard C. Breeden	STE	Employee Stock Option (right to buy)	Options Exercise	-100%			-3,781	0	02 Jun 2026	Direct
John Adam Zangerle	STE	Ordinary Shares	Tax liability	-1%			-337	33,332	01 Jun 2026	Direct
Renato Tamaro	STE	Ordinary Shares	Tax liability	-1.42%			-81	5,614	01 Jun 2026	Direct

^* marks a reported price that did not pass the local price check.