13F Insight
DOSSIER · 13F Holders · Q2 2026Utilities · Natural Gas Distribution
ATO

ATMOS ENERGY CORP

1,082 institutions still hold ATMOS ENERGY CORP as of Q2 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 049560105·Natural Gas Distribution·1,082 13F holders·last filed Jun 30, 2026
Market cap
—
13F value held
$17.1B
visible holders
Holders
1,082
filers reporting
Concentration
15.36%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q2 2026

Heavy net capital outflows hit Atmos Energy in Q2 2026 as market leader Perpetual Ltd trimmed over 107,000 shares worth $18.5 million. Boston Trust Walden also scaled back exposure (-13.4%, -$7.49M flow), while Assenagon Asset Management aggressively quadrupled its position (+$21.78M flow).

Top Institutional Trims

  • Perpetual Ltd: Reduced holding from 1,240,469 to 1,133,323 shares (-8.6%, -$18.46M flow), preserving a dominant $195.24M position.
  • Boston Trust Walden: Cut 43,480 shares (-13.4%, -$7.49M flow) to 281,447 shares ($48.48M).
  • Eastern Bank: Reduced stake by 14,698 shares (-23.1%, -$2.53M flow).
Analysis generated by 13F Insight from SEC Form 13F filing data · Q2 2026. Methodology

Top holders

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

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$2.6B15.2M0.04%Q2 202602
STATE STREET CORP
CIK 0000093751
$2.0B11.4M0.06%Q2 202603
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$1.9B10.9M0.04%Q2 202604
Vanguard Portfolio Management
CIK 0002100121· Index
$1.6B9.4M0.07%Q2 202605
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$1.6B9.2M0.27%Q2 202606
Capital International Investors
CIK 0001562230
$1.3B7.5M0.27%Q2 202607
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$770M4.5M0.04%Q2 202608
BANK OF AMERICA CORP /DE/
CIK 0000070858
$720M4.2M0.05%Q2 202609
Invesco Ltd.
CIK 0000914208
$547M3.2M0.04%Q2 202610
PRICE T ROWE ASSOCIATES INC /MD/
CIK 0000080255
$502M2.7M0.06%Q1 202611
MORGAN STANLEY
CIK 0000895421
$493M2.9M0.03%Q2 202612
DEUTSCHE BANK AG\
CIK 0000948046
$432M2.5M0.13%Q2 202613
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$409M2.4M0.14%Q2 202614
GOLDMAN SACHS GROUP INC
CIK 0000886982
$373M2.2M0.03%Q2 202615
Qube Research & Technologies Ltd
CIK 0001729829
$368M2.1M0.34%Q2 202616
NORGES BANK
CIK 0001374170· Sovereign
$358M2.1M0.04%Q2 202617
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
CIK 0000912938
$321M1.8M0.10%Q2 202618
Amundi
CIK 0001330387
$314M1.8M0.08%Q2 202619
Legal & General Group Plc
CIK 0000764068
$277M1.6M0.06%Q2 202620
Capital Research Global Investors
CIK 0001422848
$260M1.5M0.04%Q2 2026
Page 1 of 55
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Insiders at ATMOS ENERGY CORP
Ware William James →Garza Rafael G →Geiser Edward →Akers John K →Faulk Michelle →Forsythe Christopher T →Hartsfield Karen E →Sampson Richard A →