AI Holders Summary · Q2 2026

222 institutions reported AMPH in Q2 2026. BlackRock, Inc. leads at 25.2% of the visible book.

Top holders

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

Hide index funds / market makers / custodians(5 on this page)

#HolderValueShares% port.Quarter

BlackRock, Inc.

CIK 0002012383

$105M5.2M0.00%Q2 2026 02

DIMENSIONAL FUND ADVISORS LP

CIK 0000354204· Quasi-passive

$47M2.3M0.01%Q2 2026 03

STATE STREET CORP

CIK 0000093751

$33M1.6M0.00%Q2 2026 04

VANGUARD CAPITAL MANAGEMENT LLC

CIK 0002100119· Index

$30M1.5M0.00%Q2 2026 05

AMERICAN CENTURY COMPANIES INC

CIK 0000748054

$24M1.2M0.01%Q2 2026 06

MARSHALL WACE, LLP

CIK 0001318757

$22M1.1M0.02%Q2 2026 07

GEODE CAPITAL MANAGEMENT, LLC

CIK 0001214717· Index

$20M970K0.00%Q2 2026 08

FULLER & THALER ASSET MANAGEMENT, INC.

CIK 0001082327

$19M949K0.05%Q2 2026 09

Vanguard Portfolio Management

CIK 0002100121· Index

$16M810K0.00%Q2 2026 10

D. E. Shaw & Co., Inc.

CIK 0001009207

$15M557K0.01%Q4 2025 11

LSV ASSET MANAGEMENT

CIK 0001050470

$13M652K0.03%Q1 2026 12

RENAISSANCE TECHNOLOGIES LLC

CIK 0001037389

$11M525K0.01%Q2 2026 13

GOLDMAN SACHS GROUP INC

CIK 0000886982

$10M505K0.00%Q2 2026 14

SYSTEMATIC FINANCIAL MANAGEMENT LP

CIK 0001085936

$9M437K0.18%Q2 2026 15

MORGAN STANLEY

CIK 0000895421

$9M435K0.00%Q2 2026 16

UBS Group AG

CIK 0001610520

$8M393K0.00%Q2 2026 17

DENALI ADVISORS LLC

CIK 0001142941

$8M376K0.76%Q2 2026 18

NORTHERN TRUST CORP

CIK 0000073124· Index

$7M371K0.00%Q2 2026 19

Bridge City Capital, LLC

CIK 0001713521

$7M339K1.56%Q2 2026 20

CITADEL ADVISORS LLC

CIK 0001423053

$6M241K0.00%Q4 2025

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