Matt J Robbins

Insider

First SEC filing: Jan. 12, 2017 · Latest: May 4, 2026

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.
Compensation Executive pay disclosed in company proxy statements.

Insider at

ATO selling Aug. 11, 2021

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 65 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

65 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 2, 2026	ATO	M	2,815	—	—	4,195 Direct	-40.16%	Disposed	(price as of 2026-08-20)
May 2, 2026	ATO	F	1,042	$189.74	$197,709	27,366 Direct	-3.67%	Disposed	-9.3% (price as of 2026-08-20)
May 2, 2026	ATO	M	2,815	$189.74	$534,118	28,408 Direct	+11.00%	Acquired	-9.3% (price as of 2026-08-20)
Feb. 3, 2026	ATO	A	1,240	$168.06	$208,394	7,010 Direct	+21.49%	Acquired	2.3% (price as of 2026-08-20)
Dec. 10, 2025	ATO	G	1,500	$166.80	$250,200	25,593 Direct	-5.54%	Disposed	3.1% (price as of 2026-08-20)
Nov. 4, 2025	ATO	F	2,124	$172.96	$367,367	27,093 Direct	-7.27%	Disposed	-0.6% (price as of 2026-08-20)
Nov. 4, 2025	ATO	M	5,396	$172.96	$933,292	29,217 Direct	+22.65%	Acquired	-0.6% (price as of 2026-08-20)
May 2, 2025	ATO	M	2,505	—	—	5,770 Direct	-30.27%	Disposed	(price as of 2026-08-20)
May 2, 2025	ATO	F	996	$160.66	$160,017	23,821 Direct	-4.01%	Disposed	7.1% (price as of 2026-08-20)
May 2, 2025	ATO	M	2,505	$160.66	$402,453	24,817 Direct	+11.23%	Acquired	7.1% (price as of 2026-08-20)
Feb. 4, 2025	ATO	A	1,455	$142.36	$207,134	8,275 Direct	+21.33%	Acquired	20.8% (price as of 2026-08-20)
Nov. 15, 2024	ATO	G	1,500	—	—	22,312 Direct	-6.30%	Disposed	(price as of 2026-08-20)
Nov. 5, 2024	ATO	F	1,806	$137.32	$248,000	23,812 Direct	-7.05%	Disposed	25.3% (price as of 2026-08-20)
Nov. 5, 2024	ATO	M	4,588	$137.32	$630,024	25,618 Direct	+21.82%	Acquired	25.3% (price as of 2026-08-20)
May 7, 2024	ATO	A	1,500	$119.86	$179,790	6,820 Direct	+28.20%	Acquired	43.5% (price as of 2026-08-20)
May 3, 2024	ATO	M	3,215	—	—	5,320 Direct	-37.67%	Disposed	(price as of 2026-08-20)
May 3, 2024	ATO	F	1,276	$119.09	$151,959	21,030 Direct	-5.72%	Disposed	44.4% (price as of 2026-08-20)
May 3, 2024	ATO	M	3,215	$119.09	$382,874	22,306 Direct	+16.84%	Acquired	44.4% (price as of 2026-08-20)
Nov. 8, 2023	ATO	F	2,531	$108.60	$274,867	19,091 Direct	-11.71%	Disposed	58.4% (price as of 2026-08-20)
Nov. 8, 2023	ATO	M	6,430	$108.60	$698,298	21,622 Direct	+42.32%	Acquired	58.4% (price as of 2026-08-20)
May 5, 2023	ATO	M	2,610	—	—	8,535 Direct	-23.42%	Disposed	(price as of 2026-08-20)
May 5, 2023	ATO	F	1,038	$117.92	$122,401	15,192 Direct	-6.40%	Disposed	45.9% (price as of 2026-08-20)
May 5, 2023	ATO	M	2,610	$117.92	$307,771	16,230 Direct	+19.16%	Acquired	45.9% (price as of 2026-08-20)
May 3, 2023	ATO	A	2,815	$113.83	$320,431	11,145 Direct	+33.79%	Acquired	51.1% (price as of 2026-08-20)
May 6, 2022	ATO	M	2,885	—	—	8,330 Direct	-25.72%	Disposed	(price as of 2026-08-20)
May 6, 2022	ATO	F	1,141	$114.33	$130,451	12,038 Direct	-8.66%	Disposed	50.4% (price as of 2026-08-20)
May 6, 2022	ATO	M	2,885	$114.33	$329,842	13,179 Direct	+28.03%	Acquired	50.4% (price as of 2026-08-20)
May 3, 2022	ATO	A	2,505	$113.26	$283,716	11,215 Direct	+28.76%	Acquired	51.9% (price as of 2026-08-20)
Nov. 10, 2021	ATO	M	4,683	$93.98	$440,108	12,137 Direct	+62.83%	Acquired	83.0% (price as of 2026-08-20)
Nov. 10, 2021	ATO	F	1,843	$93.98	$173,205	10,294 Direct	-15.18%	Disposed	83.0% (price as of 2026-08-20)
Aug. 13, 2021	ATO	G	500	—	—	7,454 Direct	-6.29%	Disposed	(price as of 2026-08-20)
Aug. 11, 2021	ATO	S	4,500	$101.12	$455,040	7,954 Direct	-36.13%	Disposed	70.1% (price as of 2026-08-20)
May 4, 2021	ATO	A	3,215	$103.49	$332,720	8,710 Direct	+58.51%	Acquired	66.2% (price as of 2026-08-20)
May 1, 2021	ATO	M	3,000	—	—	5,495 Direct	-35.31%	Disposed	(price as of 2026-08-20)
May 1, 2021	ATO	F	1,195	$102.88	$122,942	12,454 Direct	-8.76%	Disposed	67.2% (price as of 2026-08-20)
May 1, 2021	ATO	M	3,000	$102.88	$308,640	13,649 Direct	+28.17%	Acquired	67.2% (price as of 2026-08-20)
Nov. 11, 2020	ATO	F	1,458	$101.25	$147,622	10,649 Direct	-12.04%	Disposed	69.9% (price as of 2026-08-20)
Nov. 11, 2020	ATO	M	3,704	$101.25	$375,030	12,107 Direct	+44.08%	Acquired	69.9% (price as of 2026-08-20)
Aug. 7, 2020	ATO	M	775	—	—	8,495 Direct	-8.36%	Disposed	(price as of 2026-08-20)
Aug. 7, 2020	ATO	F	305	$105.25	$32,101	8,366 Direct	-3.52%	Disposed	63.4% (price as of 2026-08-20)
Aug. 7, 2020	ATO	M	775	$105.25	$81,569	8,671 Direct	+9.82%	Acquired	63.4% (price as of 2026-08-20)
May 5, 2020	ATO	A	2,610	$102.03	$266,298	9,270 Direct	+39.19%	Acquired	68.6% (price as of 2026-08-20)
May 1, 2020	ATO	M	1,750	—	—	6,660 Direct	-20.81%	Disposed	(price as of 2026-08-20)
May 1, 2020	ATO	F	696	$99.97	$69,579	7,896 Direct	-8.10%	Disposed	72.1% (price as of 2026-08-20)
May 1, 2020	ATO	M	1,750	$99.97	$174,948	8,592 Direct	+25.58%	Acquired	72.1% (price as of 2026-08-20)
Nov. 5, 2019	ATO	F	1,033	$108.40	$111,977	6,842 Direct	-13.12%	Disposed	58.7% (price as of 2026-08-20)
Nov. 5, 2019	ATO	M	2,625	$108.40	$284,550	7,875 Direct	+50.00%	Acquired	58.7% (price as of 2026-08-20)
Nov. 5, 2019	ATO	F	458	$108.40	$49,647	5,250 Direct	-8.02%	Disposed	58.7% (price as of 2026-08-20)
Nov. 5, 2019	ATO	M	1,163	$108.40	$126,069	5,708 Direct	+25.59%	Acquired	58.7% (price as of 2026-08-20)
May 7, 2019	ATO	A	2,885	—	—	8,410 Direct	+52.22%	Acquired	(price as of 2026-08-20)
May 4, 2019	ATO	M	975	—	—	5,525 Direct	-15.00%	Disposed	(price as of 2026-08-20)
May 4, 2019	ATO	F	391	$102.47	$40,066	4,545 Direct	-7.92%	Disposed	67.9% (price as of 2026-08-20)
May 4, 2019	ATO	M	975	$102.47	$99,908	4,936 Direct	+24.61%	Acquired	67.9% (price as of 2026-08-20)
Nov. 6, 2018	ATO	F	529	$94.18	$49,821	3,961 Direct	-11.78%	Disposed	82.6% (price as of 2026-08-20)
Nov. 6, 2018	ATO	M	1,343	$94.18	$126,484	4,490 Direct	+42.68%	Acquired	82.6% (price as of 2026-08-20)
May 5, 2018	ATO	M	1,080	—	—	6,500 Direct	-14.25%	Disposed	(price as of 2026-08-20)
May 5, 2018	ATO	F	435	$88.86	$38,654	3,147 Direct	-12.14%	Disposed	93.6% (price as of 2026-08-20)
May 5, 2018	ATO	M	1,080	$88.86	$95,969	3,582 Direct	+43.17%	Acquired	93.6% (price as of 2026-08-20)
May 1, 2018	ATO	A	3,000	—	—	7,580 Direct	+65.50%	Acquired	(price as of 2026-08-20)
Nov. 7, 2017	ATO	F	718	$88.24	$63,356	2,502 Direct	-22.30%	Disposed	94.9% (price as of 2026-08-20)
Nov. 7, 2017	ATO	M	1,710	$88.24	$150,890	3,220 Direct	+113.25%	Acquired	94.9% (price as of 2026-08-20)
Aug. 7, 2017	ATO	A	775	—	—	4,580 Direct	+20.37%	Acquired	(price as of 2026-08-20)
May 6, 2017	ATO	M	370	—	—	3,805 Direct	-8.86%	Disposed	(price as of 2026-08-20)
May 6, 2017	ATO	F	175	$81.90	$14,332	1,510 Direct	-10.39%	Disposed	110.0% (price as of 2026-08-20)
May 6, 2017	ATO	M	370	$81.90	$30,303	1,685 Direct	+28.14%	Acquired	110.0% (price as of 2026-08-20)
May 2, 2017	ATO	A	1,750	—	—	4,175 Direct	+72.16%	Acquired	(price as of 2026-08-20)

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.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
May 2, 2026	ATO	Restricted Stock Unit	Common Stock (2,815)	—	—	2,815	Disposed
Feb. 3, 2026	ATO	Restricted Stock Unit	Common Stock (1,240)	—	—	1,240	Acquired
May 2, 2025	ATO	Restricted Stock Unit	Common Stock (2,505)	—	—	2,505	Disposed
Feb. 4, 2025	ATO	Restricted Stock Unit	Common Stock (1,455)	—	—	1,455	Acquired
May 7, 2024	ATO	Restricted Stock Unit	Common Stock (1,500)	—	—	1,500	Acquired
May 3, 2024	ATO	Restricted Stock Unit	Common Stock (3,215)	—	—	3,215	Disposed
May 5, 2023	ATO	Restricted Stock Unit	Common Stock (2,610)	—	—	2,610	Disposed
May 3, 2023	ATO	Restricted Stock Unit	Common Stock (2,815)	—	—	2,815	Acquired
May 6, 2022	ATO	Restricted Stock Unit	Common Stock (2,885)	—	—	2,885	Disposed
May 3, 2022	ATO	Restricted Stock Unit	Common Stock (2,505)	—	—	2,505	Acquired
May 4, 2021	ATO	Restricted Stock Unit	Common Stock (3,215)	—	—	3,215	Acquired
May 1, 2021	ATO	Restricted Stock Unit	Common Stock (3,000)	—	—	3,000	Disposed
Aug. 7, 2020	ATO	Restricted Stock Unit	Common Stock (775)	—	—	775	Disposed
May 5, 2020	ATO	Restricted Stock Unit	Common Stock (2,610)	—	—	2,610	Acquired
May 1, 2020	ATO	Restricted Stock Unit	Common Stock (1,750)	—	—	1,750	Disposed
May 7, 2019	ATO	Restricted Stock Unit	Common Stock (2,885)	—	—	2,885	Acquired
May 4, 2019	ATO	Restricted Stock Unit	Common Stock (975)	—	—	975	Disposed
May 5, 2018	ATO	Restricted Stock Unit	Common Stock (1,080)	—	—	1,080	Disposed
May 1, 2018	ATO	Restricted Stock Unit	Common Stock (3,000)	—	—	3,000	Acquired
Aug. 7, 2017	ATO	Restricted Stock Unit	Common Stock (775)	—	—	775	Acquired
May 6, 2017	ATO	Restricted Stock Unit	Common Stock (370)	—	—	370	Disposed
May 2, 2017	ATO	Restricted Stock Unit	Common Stock (1,750)	—	—	1,750	Acquired

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

Initial ownership (Form 3) 4 holdings

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

Date	Ticker	Security	Shares	Ownership
Jan. 12, 2017	ATO	Common Stock	1,315	Direct
Jan. 11, 2017	ATO	Common Stock	3,448	Direct
Jan. 11, 2017	ATO	Common Stock	1,397	Indirect
Jan. 11, 2017	ATO	Restricted Stock Unit→ Common Stock (2,425)	2,425	Direct

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

ATO

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2024	$377,122	—	—	—	$363,417	$53,014	$201,894	$1,714,008
2023	$357,642	—	—	—	$286,106	$43,447	$189,930	$1,517,988
2022	$341,523	—	—	—	$278,089	$34,786	$163,076	$1,384,907

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.