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ATRI

ATRION CORP

Total Trades

3

Buys

2

Sells

1

Largest Trade

$500K+

Insiders

3

Institutional Funds

1

Inst. Value

<$1K

Activist Filings

27

Insider Trades

Insider	Title	Type	Value	Shares	Price	Date
Athey Preston G	Director	BUY	$50K–$100K	300	$319.68	Dec 1, 2023
Battat David A	President & CEO	BUY	$50K–$100K	300	$300.00	Nov 16, 2023
STRICKLAND JEFFERY	Officer/ CFO	SELL	$500K+	1K	$675.00	Oct 27, 2022

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Institutional Ownership

13F filings as of Dec 31, 2025 · 1 funds holding

Fund	Shares	Value	Type
HUNTINGTON NATIONAL BANK	1	<$1K	SH

Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

Glazer Capital, LLC

SC 13G/A · Nov 14, 2024

0.0%

0 shares

Kayne Anderson Rudnick Investment Management, LLC 95-4575414

SC 13G/A · Sep 9, 2024

0.0%

0 shares

Stupp Bros., Inc.

SC 13D/A · Aug 22, 2024

0.0%

0 shares

John P. Stupp, Jr.

SC 13D/A · Aug 22, 2024

0.0%

0 shares

SC 13D/A · Aug 22, 2024

0.0%

0 shares

David A. Battat

SC 13D/A · Aug 22, 2024

0.0%

0 shares

Nordson Corporation (2)

SC 13D/A · Aug 21, 2024

0.0%

0 shares

Glazer Capital, LLC

SC 13G · Jul 26, 2024

6.0%

105K shares

Neuberger Berman Group LLC 61-1591182Â

SC 13G/A · Jul 2, 2024

2.3%

40K shares

Nordson Corporation (2)

SC 13D · May 30, 2024

22.0%

387K shares

Stupp Bros., Inc.

SC 13D/A · May 30, 2024

7.7%

135K shares

David A. Battat

SC 13D · May 30, 2024

5.4%

95K shares

John P. Stupp, Jr.

SC 13D/A · May 29, 2024

7.7%

141K shares

SC 13D/A · May 29, 2024

8.6%

151K shares

T. Rowe Price Investment Management, Inc. 85-4328500

SC 13G · Feb 14, 2024

6.6%

115K shares

Kayne Anderson Rudnick Investment Management, LLC 95-4575414

SC 13G/A · Feb 13, 2024

11.1%

195K shares

Neuberger Berman Group LLC 61-1591182Â

SC 13G/A · Feb 12, 2024

10.4%

183K shares

BlackRock, Inc.

SC 13G/A · Jan 29, 2024

6.6%

115K shares

KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 95-4575414

SC 13G/A · Feb 14, 2023

10.8%

191K shares

T. Rowe Price Investment Management, Inc. 85-4328500

SC 13G · Feb 14, 2023

6.5%

116K shares

T. ROWE PRICE ASSOCIATES, INC. 52-0556948

SC 13G/A · Feb 14, 2023

0.5%

9K shares

Neuberger Berman Group LLC

SC 13G/A · Feb 10, 2023

11.0%

195K shares

BlackRock, Inc.

SC 13G/A · Jan 31, 2023

6.4%

113K shares

T. ROWE PRICE ASSOCIATES, INC. 52-0556948

SC 13G/A · Feb 14, 2022

8.0%

145K shares

KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 95-4575414

SC 13G/A · Feb 11, 2022

10.6%

191K shares

Neuberger Berman Group LLC

SC 13G/A · Feb 11, 2022

11.6%

208K shares

BlackRock, Inc.

SC 13G/A · Jan 31, 2022

6.4%

115K shares