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Clarkston Capital Partners, LLC

Activist investor & 5%+ owner · SC 13D/13G filings

Total Filings

40

Stocks Covered

14

Latest Filing

Feb 13, 2026

Filings

Affiliated Managers Group, Inc.

SC 13G/A · Feb 13, 2026

3.2%

904K shares

JOHN WILEY & SONS, INC.

SC 13G · Feb 13, 2026

6.0%

2.6M shares

NEOGEN CORP

SC 13G/A · Nov 13, 2025

5.4%

11.7M shares

Neogen Corporation

SC 13G · Aug 13, 2025

6.4%

14.0M shares

JOHN WILEY & SONS, INC.

SC 13G/A · Aug 13, 2025

4.2%

1.9M shares

Hillenbrand, Inc.

SC 13G/A · Aug 13, 2025

4.7%

3.3M shares

Leslie's, Inc.

SC 13G/A · Aug 6, 2025

0.0%

80K shares

Cable One, Inc.

SC 13G/A · Jul 8, 2025

0.0%

250 shares

Leslie's, Inc.

SC 13G/A · Jul 8, 2025

7.6%

14.0M shares

Cable One, Inc.

SC 13G · May 13, 2025

6.3%

357K shares

Affiliated Managers Group, Inc.

SC 13G/A · Feb 14, 2025

5.2%

1.6M shares

Clarivate PLC

SC 13G/A · Dec 5, 2024

10.2%

72.2M shares

Stericycle, Inc.

SC 13G/A · Nov 8, 2024

4.1%

3.8M shares

John Wiley & Sons, Inc.

SC 13G/A · Nov 8, 2024

7.3%

3.3M shares

N/A

Altice USA, Inc.

SC 13G/A · Sep 4, 2024

2.2%

6.0M shares

Leslie’s, Inc.

SC 13G/A · May 8, 2024

12.8%

23.6M shares

Post Holdings, Inc.

SC 13G · Feb 12, 2024

5.9%

3.6M shares

Leslie’s, Inc.

SC 13G · Feb 12, 2024

9.9%

18.2M shares

Hillenbrand, Inc.

SC 13G/A · Feb 12, 2024

6.3%

4.4M shares

Energizer Holdings, Inc.

SC 13G/A · Feb 12, 2024

5.8%

4.1M shares

N/A

Altice USA, Inc.

SC 13G/A · Feb 12, 2024

13.1%

35.5M shares

John Wiley & Sons, Inc.

SC 13G/A · Feb 12, 2024

9.2%

4.2M shares

Clarivate PLC

SC 13G/A · Feb 12, 2024

8.5%

56.3M shares

Stericycle Inc.

SC 13G/A · Feb 12, 2024

7.0%

6.5M shares

Enerpac Tool Group Corp.

SC 13G/A · Feb 12, 2024

0.0%

0 shares

Affiliated Managers Group, Inc.

SC 13G/A · Feb 12, 2024

6.6%

2.2M shares

N/A

Altice USA, Inc.

SC 13G/A · May 17, 2023

13.0%

35.3M shares

Enerpac Tool Group Corp.

SC 13G/A · Feb 14, 2023

8.8%

5.0M shares

John Wiley & Sons, Inc.

SC 13G/A · Feb 14, 2023

5.9%

2.7M shares

Hillenbrand, Inc.

SC 13G/A · Feb 14, 2023

7.4%

5.1M shares

N/A

Altice USA, Inc.

SC 13G/A · Feb 14, 2023

7.8%

35.3M shares

Stericycle Inc.

SC 13G · Feb 14, 2023

6.9%

6.3M shares

Energizer Holdings, Inc.

SC 13G · Feb 14, 2023

5.7%

4.0M shares

Clarivate PLC

SC 13G · Feb 14, 2023

7.2%

48.5M shares

Affiliated Managers Group, Inc.

SC 13G · Feb 14, 2023

5.9%

2.2M shares

CDK Global, Inc.

SC 13G/A · Aug 2, 2022

0.0%

0 shares

Nielsen Holdings plc

SC 13G/A · May 10, 2022

3.0%

10.6M shares

N/A

Altice USA, Inc.

SC 13G/A · Apr 7, 2022

10.2%

27.6M shares

US Ecology, Inc.

SC 13G/A · Mar 8, 2022

0.0%

0 shares

US Ecology, Inc.

SC 13G · Feb 10, 2022

10.0%

3.2M shares