Ownership

Who owns Atmos Energy Corp, from the filings themselves: stakes over 5% (Schedule 13D/G), the institutional managers reporting the stock each quarter (13F), and the funds holding it (N-PORT).

Stakes over 5%

Investors crossing 5% ownership must disclose it. Schedule 13G filers certify the stake is passive; Schedule 13D is the general form for everyone else — founders, strategic holders, and activists alike. Each entry is the holder's most recent disclosure. Coverage begins with SEC's structured filings from December 18, 2024; a holder appears once they file or amend after that date.

Wellington Management Group LLP, Wellington Group Holdings LLP, Wellington Investment Advisors Holdings LLP August 13, 2026

Wellington Management Group LLP: 5.5% · 9,185,798 shares — Wellington Group Holdings LLP: 5.5% · 9,185,798 shares — Wellington Investment Advisors Holdings LLP: 5.5% · 9,185,798 shares

View filing (SCHEDULE 13G/A) Amendment #5

BlackRock, Inc. July 27, 2026

BlackRock, Inc.: 8.7% · 14,538,261 shares

View filing (SCHEDULE 13G/A) Amendment #4

6 more 5% stakes behind a free account

See every investor who has disclosed crossing 5% of Atmos Energy Corp.

Super investors holding ATO

Every institutional manager whose latest 13F reports this stock, largest position first. "% of their portfolio" is the weight inside that manager's own book — how much conviction the position represents; "% of company" is how much of Atmos Energy Corp they hold. Together these 1228 managers report 109.46% of shares outstanding.

Investor	Position value	Shares	% of their portfolio	% of company	As of
VANGUARD GROUP INC	$3.53B	21,032,554	0.05%	12.45%	December 31, 2025
BlackRock, Inc.	$2.62B	15,237,564	0.04%	9.02%	June 30, 2026

1,226 more institutional holders behind a free account

See every manager reporting Atmos Energy Corp, how much of the company they hold, and how big the position is inside their own portfolio.

Funds holding ATO

Funds disclosing this stock in their monthly N-PORT portfolio, with the position's share of the fund's net assets. Together the 500 largest funds we checked hold 45.08% of shares outstanding — counted inside the manager totals above, not on top of them, since a fund's shares also appear in its manager's 13F.

Fund	Position value	% of net assets	% of company	As of
VANGUARD TOTAL STOCK MARKET INDEX FUND	$913M	0.04%	3.14%	June 30, 2026
VANGUARD 500 INDEX FUND	$745M	0.04%	2.56%	June 30, 2026

498 more funds behind a free account

See every fund holding Atmos Energy Corp and what share of its net assets the position represents.