AI Holders Summary · Q2 2026

261 institutions reported ROCK in Q2 2026. BlackRock, Inc. leads at 20.1% of the visible book.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

Hide index funds / market makers / custodians(6 on this page)

#HolderValueShares% port.Quarter

BlackRock, Inc.

CIK 0002012383

$222M4.9M0.00%Q2 2026 02

FMR LLC

CIK 0000315066

$201M4.4M0.01%Q2 2026 03

ALLIANCEBERNSTEIN L.P.

CIK 0001109448

$109M2.2M0.04%Q1 2026 04

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$68M1.5M0.01%Q2 2026 05

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$60M1.3M0.00%Q2 2026 06

Vanguard Portfolio Management

CIK 0002100121· Index

$58M1.3M0.00%Q2 2026 07

STATE STREET CORP

CIK 0000093751

$55M1.2M0.00%Q2 2026 08

BARROW HANLEY MEWHINNEY & STRAUSS LLC

CIK 0000313028

$44M985K0.13%Q2 2026 09

FRONTIER CAPITAL MANAGEMENT CO LLC

CIK 0000351173

$37M830K0.35%Q2 2026 10

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$37M823K0.00%Q2 2026 11

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

CIK 0001705339

$36M806K0.04%Q2 2026 12

SEGALL BRYANT & HAMILL, LLC

CIK 0001006378

$26M588K0.31%Q2 2026 13

Simcoe Capital Management, LLC

CIK 0001633362

$22M494K4.06%Q2 2026 14

Boston Partners

CIK 0001386060

$21M465K0.02%Q2 2026 15

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

CIK 0000884546· Index

$20M445K0.00%Q2 2026 16

T. Rowe Price Investment Management, Inc.

CIK 0001897612

$19M467K0.01%Q1 2026 17

ROYCE & ASSOCIATES LP

CIK 0000906304

$18M402K0.15%Q2 2026 18

SG Capital Management LLC

CIK 0001510099

$18M389K1.45%Q2 2026 19

MORGAN STANLEY

CIK 0000895421

$16M357K0.00%Q2 2026 20

NORTHERN TRUST CORP

CIK 0000073124· Index

$16M353K0.00%Q2 2026

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