Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 68 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
Jan. 3, 2022 ATO A 35 $104.28 $3,650 10,092 Direct +0.35% Acquired 50.7% (price as of 2026-10-02)
Oct. 1, 2021 ATO A 93 $88.53 $8,233 8,594 Direct +1.09% Acquired 77.5% (price as of 2026-10-02)
July 1, 2021 ATO A 85 $96.54 $8,206 9,830 Direct +0.87% Acquired 62.8% (price as of 2026-10-02)
April 1, 2021 ATO A 84 $97.97 $8,229 9,685 Direct +0.87% Acquired 60.4% (price as of 2026-10-02)
March 6, 2021 ATO M 1,375 · · 0 Direct -100.00% Disposed (price as of 2026-10-02)
March 6, 2021 ATO M 1,375 $90.79 $124,836 9,545 Direct +16.83% Acquired 73.1% (price as of 2026-10-02)
March 5, 2021 ATO A 1,652 $90.79 $149,985 35,669 Direct +4.86% Acquired 73.1% (price as of 2026-10-02)
Jan. 4, 2021 ATO A 87 $94.81 $8,248 8,170 Direct +1.08% Acquired 65.8% (price as of 2026-10-02)
Oct. 1, 2020 ATO A 86 $95.58 $8,220 8,033 Direct +1.08% Acquired 64.4% (price as of 2026-10-02)
July 1, 2020 ATO A 82 $100.54 $8,244 7,900 Direct +1.05% Acquired 56.3% (price as of 2026-10-02)
April 1, 2020 ATO A 85 $96.18 $8,175 7,775 Direct +1.11% Acquired 63.4% (price as of 2026-10-02)
March 6, 2020 ATO A 1,375 $109.09 $149,999 1,375 Direct · Acquired 44.1% (price as of 2026-10-02)
Jan. 2, 2020 ATO A 74 $110.73 $8,194 7,648 Direct +0.98% Acquired 41.9% (price as of 2026-10-02)
Oct. 1, 2019 ATO A 72 $113.56 $8,176 7,534 Direct +0.96% Acquired 38.4% (price as of 2026-10-02)
Oct. 1, 2019 ATO A 72 $114.12 $8,217 7,534 Direct +0.96% Acquired 37.7% (price as of 2026-10-02)
July 1, 2019 ATO A 78 $105.01 $8,191 7,426 Direct +1.06% Acquired 49.7% (price as of 2026-10-02)
April 1, 2019 ATO A 80 $102.24 $8,179 7,310 Direct +1.11% Acquired 53.7% (price as of 2026-10-02)
March 8, 2019 ATO A 1,504 $99.73 $149,994 32,557 Direct +4.84% Acquired 57.6% (price as of 2026-10-02)
Jan. 2, 2019 ATO A 111 $91.02 $10,103 7,193 Direct +1.57% Acquired 72.7% (price as of 2026-10-02)
Oct. 1, 2018 ATO A 68 $93.40 $6,351 7,044 Direct +0.97% Acquired 68.3% (price as of 2026-10-02)
July 2, 2018 ATO A 70 $90.12 $6,308 6,940 Direct +1.02% Acquired 74.4% (price as of 2026-10-02)
April 2, 2018 ATO A 76 $83.51 $6,347 6,832 Direct +1.12% Acquired 88.2% (price as of 2026-10-02)
March 9, 2018 ATO A 3,000 $79.80 $239,400 30,378 Direct +10.96% Acquired 97.0% (price as of 2026-10-02)
Jan. 2, 2018 ATO A 74 $85.56 $6,331 6,716 Direct +1.11% Acquired 83.7% (price as of 2026-10-02)
Oct. 2, 2017 ATO A 75 $84.16 $6,312 6,607 Direct +1.15% Acquired 86.8% (price as of 2026-10-02)
July 3, 2017 ATO A 75 $83.16 $6,237 6,499 Direct +1.17% Acquired 89.0% (price as of 2026-10-02)
April 3, 2017 ATO A 79 $78.72 $6,219 6,390 Direct +1.25% Acquired 99.7% (price as of 2026-10-02)
March 10, 2017 ATO A 3,000 $77.19 $231,570 26,797 Direct +12.61% Acquired 103.6% (price as of 2026-10-02)
Feb. 8, 2017 ATO A 5 $74.22 $371 6,274 Direct +0.08% Acquired 111.8% (price as of 2026-10-02)
Jan. 3, 2017 ATO A 75 $74.10 $5,558 6,269 Direct +1.21% Acquired 112.1% (price as of 2026-10-02)
Oct. 3, 2016 ATO A 76 $73.82 $5,610 6,157 Direct +1.25% Acquired 112.9% (price as of 2026-10-02)
July 1, 2016 ATO A 69 $80.84 $5,578 6,047 Direct +1.15% Acquired 94.4% (price as of 2026-10-02)
April 1, 2016 ATO A 75 $74.24 $5,568 5,944 Direct +1.28% Acquired 111.7% (price as of 2026-10-02)
March 4, 2016 ATO A 3,000 $70.11 $210,330 23,249 Direct +14.82% Acquired 124.2% (price as of 2026-10-02)
Jan. 4, 2016 ATO A 89 $62.53 $5,565 5,834 Direct +1.55% Acquired 151.4% (price as of 2026-10-02)
Oct. 1, 2015 ATO A 97 $57.92 $5,618 5,707 Direct +1.73% Acquired 171.4% (price as of 2026-10-02)
July 1, 2015 ATO A 109 $51.29 $5,591 5,569 Direct +2.00% Acquired 206.4% (price as of 2026-10-02)
April 1, 2015 ATO A 101 $55.21 $5,576 5,419 Direct +1.90% Acquired 184.7% (price as of 2026-10-02)
March 6, 2015 ATO A 3,000 $52.43 $157,290 19,669 Direct +18.00% Acquired 199.8% (price as of 2026-10-02)
Jan. 2, 2015 ATO A 100 $55.76 $5,576 5,278 Direct +1.93% Acquired 181.9% (price as of 2026-10-02)
Oct. 1, 2014 ATO A 118 $47.66 $5,624 5,142 Direct +2.35% Acquired 229.8% (price as of 2026-10-02)
July 1, 2014 ATO A 106 $53.02 $5,620 4,987 Direct +2.17% Acquired 196.4% (price as of 2026-10-02)
April 1, 2014 ATO A 120 $46.82 $5,618 4,847 Direct +2.54% Acquired 235.7% (price as of 2026-10-02)
March 7, 2014 ATO A 3,000 · · 16,182 Direct +22.76% Acquired (price as of 2026-10-02)
Jan. 2, 2014 ATO A 125 $44.98 $5,622 4,689 Direct +2.74% Acquired 249.4% (price as of 2026-10-02)
Oct. 1, 2013 ATO A 131 $42.66 $5,588 4,527 Direct +2.98% Acquired 268.4% (price as of 2026-10-02)
July 1, 2013 ATO A 137 $40.94 $5,609 4,357 Direct +3.25% Acquired 283.9% (price as of 2026-10-02)
April 1, 2013 ATO A 133 $42.26 $5,621 4,186 Direct +3.28% Acquired 271.9% (price as of 2026-10-02)
March 15, 2013 ATO A 3,000 · · 12,744 Direct +30.79% Acquired (price as of 2026-10-02)
Jan. 2, 2013 ATO A 157 $35.70 $5,605 4,018 Direct +4.07% Acquired 340.3% (price as of 2026-10-02)
Oct. 1, 2012 ATO A 158 $35.48 $5,606 3,824 Direct +4.31% Acquired 343.0% (price as of 2026-10-02)
July 2, 2012 ATO A 158 $35.51 $5,611 3,631 Direct +4.55% Acquired 342.6% (price as of 2026-10-02)
April 2, 2012 ATO A 177 $31.62 $5,597 3,438 Direct +5.43% Acquired 397.1% (price as of 2026-10-02)
March 9, 2012 ATO A 3,000 · · 9,358 Direct +47.18% Acquired (price as of 2026-10-02)
Jan. 3, 2012 ATO A 168 $33.45 $5,620 3,226 Direct +5.49% Acquired 369.9% (price as of 2026-10-02)
Oct. 3, 2011 ATO A 177 $31.71 $5,613 3,025 Direct +6.21% Acquired 395.6% (price as of 2026-10-02)
July 1, 2011 ATO A 167 $33.56 $5,605 2,819 Direct +6.30% Acquired 368.3% (price as of 2026-10-02)
April 1, 2011 ATO A 163 $34.45 $5,615 2,624 Direct +6.62% Acquired 356.2% (price as of 2026-10-02)
March 11, 2011 ATO A 3,000 · · 6,105 Direct +96.62% Acquired (price as of 2026-10-02)
Jan. 3, 2011 ATO A 178 $31.50 $5,607 2,436 Direct +7.88% Acquired 399.0% (price as of 2026-10-02)
Oct. 1, 2010 ATO A 191 $29.33 $5,602 2,234 Direct +9.35% Acquired 435.9% (price as of 2026-10-02)
July 1, 2010 ATO A 173 $27.02 $4,674 2,020 Direct +9.37% Acquired 481.7% (price as of 2026-10-02)
April 1, 2010 ATO A 162 $28.84 $4,672 1,824 Direct +9.75% Acquired 445.0% (price as of 2026-10-02)
March 5, 2010 ATO A 3,000 · · 3,000 Direct · Acquired (price as of 2026-10-02)
Jan. 4, 2010 ATO A 158 $29.60 $4,677 1,643 Direct +10.64% Acquired 431.0% (price as of 2026-10-02)
Jan. 4, 2010 ATO A 159 $29.40 $4,675 1,485 Direct +11.99% Acquired 434.6% (price as of 2026-10-02)
Oct. 1, 2009 ATO A 192 $28.18 $5,411 1,311 Direct +17.16% Acquired 457.7% (price as of 2026-10-02)
July 1, 2009 ATO A 119 $25.04 $2,980 1,105 Direct +12.07% Acquired 527.7% (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.

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DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
March 6, 2021 ATO Restricted Stock Unit Common Stock (1,375) · · 1,375 Disposed
March 5, 2021 ATO Phantom Stock Units Common Stock (1,652) · · 1,652 Acquired
March 6, 2020 ATO Restricted Stock Unit Common Stock (1,375) · · 1,375 Acquired
March 8, 2019 ATO Phantom Stock Units Common Stock (1,504) · · 1,504 Acquired
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

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
May 6, 2009 ATO Common Stock 974 Direct