13F institutional ownership facts

Institutions tracked

50

Reported value

$174,807,936.00

Reported shares

487,093

Latest filing period

Q1 2026

Top institutional holders

  1. Lazard Asset Management · $271,492,257 · 0.45%
  2. Robeco Institutional Asset Management · $222,956,714 · 0.32%
  3. Dmitry Balyasny - Balyasny Asset Management · $190,510,371 · 0.25%
  4. Voya Investment Mgmt · $175,194,091 · 0.18%
  5. Neuberger Berman · $153,053,568 · 0.12%
  6. UBS Group · $782,368,090 · 0.12%

Data source and limitations

This page uses public SEC Form 13F disclosures and related institutional filing data. 13F reports are periodic disclosures and may not represent current real-time holdings.

13F Hub provides research and education data only. It does not provide personalized investment advice.

$ROK

Institutional Holdings

50

Top Institutions

Top Institutions

1

Lazard Asset Management

756,499 shares

0.45%

% of Portfolio

2

Robeco Institutional Asset Management

621,257 shares

0.32%

% of Portfolio

3

Dmitry Balyasny - Balyasny Asset Management

530,847 shares

0.25%

% of Portfolio

4

Voya Investment Mgmt

488,169 shares

0.18%

% of Portfolio

5

Neuberger Berman

426,476 shares

0.12%

% of Portfolio

6

UBS Group

2,180,027 shares

0.12%

% of Portfolio

7

Mitsubishi Ufj Asset Management Co., Ltd.

398,746 shares

0.10%

% of Portfolio

8

Invesco

1,685,669 shares

0.09%

% of Portfolio

9

Charles Schwab

1,537,690 shares

0.08%

% of Portfolio

10

David Solomon - Goldman Sachs

1,922,479 shares

0.08%

% of Portfolio

11

AllianceBernstein (AB)

570,075 shares

0.07%

% of Portfolio

12

Geode Capital Management

3,057,997 shares

0.07%

% of Portfolio

13

Larry Fink - BlackRock

11,912,479 shares

0.07%

% of Portfolio

14

Northern Trust Corp

1,418,943 shares

0.07%

% of Portfolio

15

Morgan Stanley

2,823,547 shares

0.06%

% of Portfolio

16

New York State Teachers Retirement System

85,434 shares

0.06%

% of Portfolio

17

State Street Corp

5,058,012 shares

0.06%

% of Portfolio

18

Ken Fisher - Fisher Asset Management

927,088 shares

0.11%

% of Portfolio

19

Legal & General

814,906 shares

0.07%

% of Portfolio

20

Adage Capital Partners

100,700 shares

0.06%

% of Portfolio

21

Canada Pension Plan Investment Board

238,018 shares

0.06%

% of Portfolio

22

Jennison Associates

250,085 shares

0.06%

% of Portfolio

23

T. Rowe Price

1,364,997 shares

0.06%

% of Portfolio

24

David E. Shaw - D.E. Shaw & Co.

167,106 shares

0.04%

% of Portfolio

25

BNP Paribas

205,426 shares

0.04%

% of Portfolio

26

CalPERS

196,223 shares

0.04%

% of Portfolio

27

Israel Englander - Millennium Management

199,360 shares

0.03%

% of Portfolio

28

Nuveen

336,357 shares

0.03%

% of Portfolio

29

SG Americas Securities

90,399 shares

0.03%

% of Portfolio

30

Two Sigma Investments

26,987 shares

0.01%

% of Portfolio

31

Cliff Asness - AQR Capital Management

80,174 shares

0.01%

% of Portfolio

32

Franklin Resources

161,559 shares

0.01%

% of Portfolio

33

Ken Griffin - Citadel Advisors

171,781 shares

0.01%

% of Portfolio

34

Ensign Peak Advisors

39,774 shares

0.03%

% of Portfolio

35

Mike Hankin - Brown Advisory INC

29,877 shares

0.02%

% of Portfolio

36

PNC Financial Services

82,851 shares

0.02%

% of Portfolio

37

Fidelity International (FIL)

27,373 shares

0.01%

% of Portfolio

38

Jan van Eck - VanEck

30,515 shares

0.01%

% of Portfolio

39

Jeremy Grantham - GMO

10,444 shares

0.01%

% of Portfolio

40

Janus Henderson Group

13,509 shares

NaN%

% of Portfolio

41

Jane Street Group

5,236 shares

NaN%

% of Portfolio

42

Wellington Management

2,839 shares

NaN%

% of Portfolio

43

Mario Gabelli - GAMCO Investors

113,606 shares

0.40%

% of Portfolio

44

Mairs & Power

283,553 shares

1.04%

% of Portfolio

45

Tom Gayner - Markel Group

154,900 shares

0.47%

% of Portfolio

46

Joel Greenblatt - Gotham Asset Management

99,213 shares

0.11%

% of Portfolio

47

Paul Tudor Jones - Tudor Investment Corp

82,349 shares

0.05%

% of Portfolio

48

Natixis

41,390 shares

0.05%

% of Portfolio

49

Nomura Holdings INC

53,032 shares

0.05%

% of Portfolio

50

PFA Pension

120,685 shares

0.13%

% of Portfolio

Institutional InsightPRO

Scale Distribution

MEGA

31%

LARGE

22%

MEDIUM

33%

SMALL

14%

Geographic Distribution

North America
61%
Europe
22%
Asia Pacific
14%
Other
5%

Institutional Activity

Buyers

56

Sellers

17

Holders

98

New

22

Exited

15

Unlock Pro to view full data

Insider TradingPRO

Trading Statistics

Insider Buyers

19

Insider Sellers

17

Purchase Value

$13.4M

Role Distribution

CEO
26%
CFO
19%
Director
36%
VP
12%
Other
5%
Unlock Pro to view full data

RatingPRO

86

A

Overall Score

Strong institutional support with positive momentum

Rating Dimensions

Institutional Ownership
71
Recent Activity
82
Concentration
63
Momentum
79
Stability
62

Recent Actions

New

11

Increased

27

Decreased

11

Exited

4

Total

40

Unlock Pro to view full data