LOOMIS SAYLES & CO L P

Position in AVTR — Avantor, Inc.

CIK 312348 BOSTON, MA

Position in AVTR

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$14,587,896

+$4,855,070 QoQ

Shares Held

1,473,525

+18.7% QoQ

Ownership

0.216%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#57

of 454 holders

Holding Since

Mar 2020

24 quarters on record

Voting authority Sole 92% Shared 0% None 8%

Healthcare · as of Jun 30, 2026

LOOMIS SAYLES & CO L P holds $694,039,405 across 4 Medical Instruments & Supplies names. AVTR ranks #3 (2.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ISRG	Intuitive Surgical Inc	1,656,156	$658,620,117
2	RGEN	Repligen Corp	148,676	$20,285,353
3	AVTR	Avantor, Inc. This page	1,473,525	$14,587,896
4	WST	West Pharmaceutical Services Inc	1,521	$546,039

24 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$14,587,896	1,473,525	+18.7%	Shares	Defined	2026-08-14
2026-03-31	$9,732,826	1,241,432	+2295.8%	Shares	Defined	2026-05-14
2025-06-30	$697,443	51,816	0.0%	Shares	Defined	2025-08-13
2025-03-31	$839,937	51,816	-91.4%	Shares	Defined	2025-05-14
2024-12-31	$12,664,522	601,069	-19.8%	Shares	Defined	2025-02-12
2024-09-30	$19,395,074	749,713	+1.4%	Shares	Defined	2024-11-13
2024-06-30	$15,669,958	739,149	-3.2%	Shares	Defined	2024-08-13
2024-03-31	$19,514,972	763,198	+0.3%	Shares	Defined	2024-05-14
2023-12-31	$17,373,104	760,977	+9.9%	Shares	Defined	2024-02-13
2023-09-30	$14,594,780	692,352	-6.5%	Shares	Defined	2023-11-09
2023-06-30	$15,202,721	740,152	-1.1%	Shares	Defined	2023-08-11
2023-03-31	$15,816,186	748,164	+6.0%	Shares	Defined	2023-05-15
2022-12-31	$14,884,330	705,753	+0.0%	Shares	Defined	2023-02-10
2022-09-30	$13,832,052	705,717	-1.9%	Shares	Defined	2022-11-14
2022-06-30	$22,367,119	719,200	+5.6%	Shares	Defined	2022-08-05
2022-03-31	$23,032,468	681,031	+10.7%	Shares	Defined	2022-05-13
2021-12-31	$25,915,888	614,995	-1.2%	Shares	Defined	2022-02-14
2021-09-30	$25,451,170	622,278	-22.5%	Shares	Defined	2021-11-12
2021-06-30	$28,513,854	802,981	+4.1%	Shares	Defined	2021-08-13
2021-03-31	$22,306,823	771,062	+13.2%	Shares	Defined	2021-05-17
2020-12-31	$19,176,905	681,240	-1.6%	Shares	Defined	2021-02-12
2020-09-30	$15,562,831	691,989	+26.4%	Shares	Defined	2020-11-12
2020-06-30	$9,306,837	547,461	+9.6%	Shares	Defined	2020-08-14
2020-03-31	$6,239,066	499,525	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.