AI Holders Summary · Q1 2026

246 institutions reported ROCK in Q1 2026. BlackRock, Inc. leads at 20.0% 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

$201M5.0M0.00%Q1 2026 02

FMR LLC

CIK 0000315066

$177M4.4M0.01%Q1 2026 03

ALLIANCEBERNSTEIN L.P.

CIK 0001109448

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

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$68M1.7M0.01%Q1 2026 05

STATE STREET CORP

CIK 0000093751

$54M1.3M0.00%Q1 2026 06

Vanguard Portfolio Management

CIK 0002100121· Index

$53M1.3M0.00%Q1 2026 07

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$53M1.3M0.00%Q1 2026 08

BARROW HANLEY MEWHINNEY & STRAUSS LLC

CIK 0000313028

$47M1.2M0.15%Q1 2026 09

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$31M778K0.00%Q1 2026 10

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

CIK 0001705339

$30M742K0.04%Q1 2026 11

FRONTIER CAPITAL MANAGEMENT CO LLC

CIK 0000351173

$27M688K0.28%Q1 2026 12

Boston Partners

CIK 0001386060

$27M687K0.03%Q1 2026 13

FIRST WILSHIRE SECURITIES MANAGEMENT INC

CIK 0000732847

$20M500K4.49%Q1 2026 14

T. Rowe Price Investment Management, Inc.

CIK 0001897612

$19M467K0.01%Q1 2026 15

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

CIK 0000884546· Index

$18M440K0.00%Q1 2026 16

SEGALL BRYANT & HAMILL, LLC

CIK 0001006378

$17M431K0.25%Q1 2026 17

D. E. Shaw & Co., Inc.

CIK 0001009207

$16M320K0.01%Q4 2025 18

MORGAN STANLEY

CIK 0000895421

$14M362K0.00%Q1 2026 19

PALISADE CAPITAL MANAGEMENT, LP

CIK 0001009006

$14M359K0.48%Q1 2026 20

NORTHERN TRUST CORP

CIK 0000073124· Index

$13M334K0.00%Q1 2026

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