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PRIMECAP Management Company 95-3868081

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

Total Filings

105

Stocks Covered

40

Latest Filing

Nov 12, 2024

Filings

NEXTRACKER INC.

SC 13G · Nov 12, 2024

5.5%

7.8M shares

GRAIL INC

SC 13G · Nov 12, 2024

7.0%

2.2M shares

WOLFSPEED, INC.

SC 13G · Nov 12, 2024

5.0%

6.3M shares

NEW FORTRESS ENERGY INC.

SC 13G · Nov 12, 2024

5.6%

11.5M shares

INDIE SEMICONDUCTOR, INC.

SC 13G/A · Nov 12, 2024

14.2%

25.5M shares

Xencor, Inc.

SC 13G/A · Nov 12, 2024

13.1%

9.1M shares

FibroGen, Inc.

SC 13G/A · Nov 12, 2024

9.9%

9.9M shares

Rhythm Pharmaceuticals, Inc.

SC 13G/A · Nov 12, 2024

11.8%

7.2M shares

Splunk Inc.

SC 13G/A · Nov 12, 2024

0.0%

0 shares

Arlo Technologies, Inc.

SC 13G/A · Sep 9, 2024

5.0%

5.0M shares

iRobot Corp

SC 13G/A · Sep 9, 2024

4.8%

1.4M shares

INDIE SEMICONDUCTOR, INC.

SC 13G · Aug 8, 2024

10.2%

17.1M shares

BioMarin Pharmaceutical Inc.

SC 13G/A · Feb 12, 2024

9.8%

18.4M shares

Biogen Inc.

SC 13G/A · Feb 12, 2024

11.2%

16.3M shares

NetApp, Inc.

SC 13G/A · Feb 12, 2024

7.1%

14.7M shares

Pulmonx Corp

SC 13G/A · Feb 12, 2024

14.7%

5.6M shares

Southwest Airlines Co.

SC 13G/A · Feb 12, 2024

8.3%

49.4M shares

United Airlines Holdings, Inc.

SC 13G/A · Feb 12, 2024

7.1%

23.4M shares

Elanco Animal Health Inc

SC 13G/A · Feb 12, 2024

10.3%

50.6M shares

Arlo Technologies, Inc.

SC 13G/A · Feb 12, 2024

5.2%

4.9M shares

Transocean Ltd.

SC 13G/A · Feb 12, 2024

6.3%

50.7M shares

Flex Ltd.

SC 13G/A · Feb 12, 2024

10.4%

45.1M shares

Xencor, Inc.

SC 13G/A · Feb 12, 2024

14.6%

8.9M shares

Rhythm Pharmaceuticals, Inc.

SC 13G/A · Feb 12, 2024

13.6%

8.1M shares

Splunk Inc.

SC 13G/A · Feb 12, 2024

6.4%

10.8M shares

Xometry, Inc.

SC 13G/A · Feb 12, 2024

14.7%

6.7M shares

Mattel, Inc.

SC 13G/A · Feb 12, 2024

11.7%

41.2M shares

FedEx Corp

SC 13G/A · Feb 12, 2024

5.2%

12.9M shares

LivaNova PLC

SC 13G/A · Feb 12, 2024

10.8%

5.8M shares

iRobot Corp

SC 13G/A · Feb 12, 2024

6.3%

1.8M shares

Whirlpool Corp

SC 13G/A · Feb 12, 2024

8.6%

4.7M shares

Raymond James Financial, Inc.

SC 13G/A · Feb 12, 2024

5.9%

12.3M shares

FibroGen, Inc.

SC 13G/A · Feb 12, 2024

14.7%

14.5M shares

Elanco Animal Health Inc

SC 13G/A · Nov 8, 2023

10.3%

50.6M shares

Nektar Therapeutics

SC 13G/A · Jul 7, 2023

4.3%

8.1M shares

Standard BioTools Inc.

SC 13G/A · Jul 7, 2023

4.1%

3.2M shares

Xometry, Inc.

SC 13G · May 9, 2023

13.6%

6.1M shares

LivaNova PLC

SC 13G/A · May 9, 2023

10.1%

5.4M shares

Elanco Animal Health Inc

SC 13G/A · Feb 9, 2023

7.0%

33.0M shares

Splunk Inc.

SC 13G · Feb 9, 2023

6.7%

10.9M shares

iRobot Corp

SC 13G/A · Feb 9, 2023

7.1%

1.9M shares

NetApp, Inc.

SC 13G/A · Feb 9, 2023

7.5%

16.1M shares

Transocean Ltd.

SC 13G/A · Feb 9, 2023

6.5%

46.6M shares

Mattel, Inc.

SC 13G/A · Feb 9, 2023

12.5%

44.3M shares

Standard BioTools Inc.

SC 13G · Feb 9, 2023

5.8%

4.6M shares

Calithera Biosciences, Inc.

SC 13G/A · Feb 9, 2023

8.2%

401K shares

Xencor, Inc.

SC 13G/A · Feb 9, 2023

10.4%

6.2M shares

FibroGen, Inc.

SC 13G/A · Feb 9, 2023

14.8%

13.9M shares

FedEx Corp

SC 13G/A · Feb 9, 2023

5.5%

13.9M shares

Biogen Inc.

SC 13G/A · Feb 9, 2023

10.9%

15.7M shares