Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 13 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
March 8, 2019 ATO A 1,504 $99.73 $149,994 29,106 Direct +5.45% Acquired 57.6% (price as of 2026-10-02)
Feb. 6, 2019 ATO C 6,901 · · 27,602 Direct -20.00% Disposed (price as of 2026-10-02)
Feb. 6, 2019 ATO C 6,901 $95.41 $658,424 7,901 Direct +690.10% Acquired 64.7% (price as of 2026-10-02)
March 9, 2018 ATO A 3,000 $79.80 $239,400 33,753 Direct +9.76% Acquired 97.0% (price as of 2026-10-02)
March 10, 2017 ATO A 3,000 $77.19 $231,570 30,100 Direct +11.07% Acquired 103.6% (price as of 2026-10-02)
March 4, 2016 ATO A 3,000 $70.11 $210,330 26,476 Direct +12.78% Acquired 124.2% (price as of 2026-10-02)
March 6, 2015 ATO A 3,000 $52.43 $157,290 22,804 Direct +15.15% Acquired 199.8% (price as of 2026-10-02)
March 7, 2014 ATO A 3,000 · · 19,226 Direct +18.49% Acquired (price as of 2026-10-02)
March 15, 2013 ATO A 3,000 · · 15,687 Direct +23.65% Acquired (price as of 2026-10-02)
March 9, 2012 ATO A 3,000 · · 12,184 Direct +32.67% Acquired (price as of 2026-10-02)
March 11, 2011 ATO A 3,000 · · 8,818 Direct +51.56% Acquired (price as of 2026-10-02)
March 5, 2010 ATO A 3,000 · · 5,591 Direct +115.79% Acquired (price as of 2026-10-02)
March 6, 2009 ATO A 2,500 · · 2,500 Direct · Acquired (price as of 2026-10-02)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
March 8, 2019 ATO Phantom Stock Units Common Stock (1,504) · · 1,504 Acquired
Feb. 6, 2019 ATO Phantom Stock Units Common Stock (6,901) · · 6,901 Disposed
March 9, 2018 ATO Phantom Stock Units Common Stock (3,000) · · 3,000 Acquired
March 10, 2017 ATO Phantom Stock Units Common Stock (3,000) · · 3,000 Acquired
March 4, 2016 ATO Phantom Stock Units Common Stock (3,000) · · 3,000 Acquired
March 6, 2015 ATO Phantom Stock Units Common Stock (3,000) · · 3,000 Acquired
March 7, 2014 ATO Phantom Stock Units Common Stock (3,000) · · 3,000 Acquired
March 15, 2013 ATO Phantom Stock Units Common Stock (3,000) · · 3,000 Acquired
March 9, 2012 ATO Phantom Stock Units Common Stock (3,000) · · 3,000 Acquired
March 11, 2011 ATO Phantom Stock Units Common Stock (3,000) · · 3,000 Acquired
March 5, 2010 ATO Phantom Stock Units Common Stock (3,000) · · 3,000 Acquired
March 6, 2009 ATO Phantom Stock Units Common Stock (2,500) · · 2,500 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 1 holding

07

Securities held when first becoming an insider, per SEC Form 3.

DateTickerSecuritySharesOwnership
Sept. 2, 2008 ATO Common Stock 1,000 Indirect