Michael T Prior

Insider

First SEC filing: Feb. 6, 2024 · Latest: Feb. 6, 2024

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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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

ATNI selling Aug. 12, 2020

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 51 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

51 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
March 25, 2026	ATNI	F	2,378	$27.92	$66,394	587,673 Direct	-0.40%	Disposed	12.6% (price as of 2026-08-20)
March 17, 2026	ATNI	A	13,524	—	—	590,051 Direct	+2.35%	Acquired	(price as of 2026-08-20)
March 17, 2026	ATNI	A	13,524	—	—	13,524 Direct	—	Acquired	(price as of 2026-08-20)
March 13, 2026	ATNI	F	4,686	$24.49	$114,760	576,527 Direct	-0.81%	Disposed	28.4% (price as of 2026-08-20)
March 12, 2026	ATNI	F	2,191	$24.65	$54,008	581,213 Direct	-0.38%	Disposed	27.6% (price as of 2026-08-20)
March 7, 2026	ATNI	M	14,500	—	—	592,816 Direct	+2.51%	Acquired	(price as of 2026-08-20)
March 7, 2026	ATNI	F	6,430	$24.18	$155,477	586,386 Direct	-1.08%	Disposed	30.1% (price as of 2026-08-20)
March 7, 2026	ATNI	F	2,982	$24.18	$72,105	583,404 Direct	-0.51%	Disposed	30.1% (price as of 2026-08-20)
March 7, 2026	ATNI	M	25,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 25, 2022	ATNI	A	21,450	—	—	469,736 Direct	+4.78%	Acquired	(price as of 2026-08-20)
March 25, 2022	ATNI	A	21,450	—	—	21,450 Direct	—	Acquired	(price as of 2026-08-20)
March 13, 2022	ATNI	F	2,026	$35.22	$71,356	448,286 Direct	-0.45%	Disposed	-10.7% (price as of 2026-08-20)
March 11, 2022	ATNI	F	2,207	$35.22	$77,731	450,312 Direct	-0.49%	Disposed	-10.7% (price as of 2026-08-20)
March 9, 2022	ATNI	F	1,569	$35.35	$55,464	452,519 Direct	-0.35%	Disposed	-11.0% (price as of 2026-08-20)
March 7, 2022	ATNI	F	2,091	$33.45	$69,944	454,088 Direct	-0.46%	Disposed	-6.0% (price as of 2026-08-20)
Dec. 10, 2021	ATNI	G	10,774	—	—	459,544 Direct	+2.40%	Acquired	(price as of 2026-08-20)
March 13, 2021	ATNI	F	2,772	$52.09	$144,393	448,770 Direct	-0.61%	Disposed	-39.6% (price as of 2026-08-20)
March 11, 2021	ATNI	F	3,021	$52.11	$157,424	451,542 Direct	-0.66%	Disposed	-39.6% (price as of 2026-08-20)
March 9, 2021	ATNI	A	19,350	—	—	19,350 Direct	—	Acquired	(price as of 2026-08-20)
March 9, 2021	ATNI	A	19,350	—	—	454,563 Direct	+4.45%	Acquired	(price as of 2026-08-20)
March 8, 2021	ATNI	F	2,428	$52.28	$126,936	435,213 Direct	-0.55%	Disposed	-39.8% (price as of 2026-08-20)
March 7, 2021	ATNI	F	2,409	$49.88	$120,161	437,641 Direct	-0.55%	Disposed	-36.9% (price as of 2026-08-20)
Aug. 12, 2020	ATNI	S 10b5-1	700	$60.28	$42,196	440,050 Direct	-0.16%	Disposed	-47.8% (price as of 2026-08-20)
Aug. 11, 2020	ATNI	S 10b5-1	1,300	$60.09	$78,117	440,750 Direct	-0.29%	Disposed	-47.7% (price as of 2026-08-20)
July 30, 2020	ATNI	S 10b5-1	300	$64.02	$19,206	128,847 Indirect	-0.23%	Disposed	-50.9% (price as of 2026-08-20)
July 15, 2020	ATNI	S 10b5-1	2,000	$62.49	$124,980	129,147 Indirect	-1.53%	Disposed	-49.7% (price as of 2026-08-20)
June 1, 2020	ATNI	S 10b5-1	2,000	$60.43	$120,860	442,050 Direct	-0.45%	Disposed	-48.0% (price as of 2026-08-20)
April 29, 2020	ATNI	S 10b5-1	400	$79.21	$31,684	444,050 Direct	-0.09%	Disposed	-60.3% (price as of 2026-08-20)
April 29, 2020	ATNI	S 10b5-1	900	$76.82	$69,138	444,450 Direct	-0.20%	Disposed	-59.1% (price as of 2026-08-20)
April 29, 2020	ATNI	S 10b5-1	1,100	$75.55	$83,105	445,350 Direct	-0.25%	Disposed	-58.4% (price as of 2026-08-20)
April 24, 2020	ATNI	S 10b5-1	939	$70.00	$65,730	131,147 Indirect	-0.71%	Disposed	-55.1% (price as of 2026-08-20)
April 24, 2020	ATNI	S 10b5-1	1,700	$70.00	$119,000	446,450 Direct	-0.38%	Disposed	-55.1% (price as of 2026-08-20)
April 23, 2020	ATNI	S 10b5-1	61	$70.00	$4,270	132,086 Indirect	-0.05%	Disposed	-55.1% (price as of 2026-08-20)
April 23, 2020	ATNI	S 10b5-1	307	$67.12	$20,606	132,147 Indirect	-0.23%	Disposed	-53.1% (price as of 2026-08-20)
April 23, 2020	ATNI	S 10b5-1	300	$70.00	$21,000	448,150 Direct	-0.07%	Disposed	-55.1% (price as of 2026-08-20)
March 17, 2020	ATNI	S 10b5-1	300	$69.23	$20,769	132,454 Indirect	-0.23%	Disposed	-54.6% (price as of 2026-08-20)
March 17, 2020	ATNI	S 10b5-1	214	$68.16	$14,586	132,754 Indirect	-0.16%	Disposed	-53.9% (price as of 2026-08-20)
March 17, 2020	ATNI	S 10b5-1	1,171	$67.08	$78,551	132,968 Indirect	-0.87%	Disposed	-53.1% (price as of 2026-08-20)
March 17, 2020	ATNI	S 10b5-1	200	$69.07	$13,814	8,041 Indirect	-2.43%	Disposed	-54.5% (price as of 2026-08-20)
March 17, 2020	ATNI	S 10b5-1	300	$68.08	$20,424	8,241 Indirect	-3.51%	Disposed	-53.8% (price as of 2026-08-20)
March 13, 2020	ATNI	F	1,829	$51.41	$94,029	448,450 Direct	-0.41%	Disposed	-38.8% (price as of 2026-08-20)
March 11, 2020	ATNI	A	27,250	—	—	450,279 Direct	+6.44%	Acquired	(price as of 2026-08-20)
March 9, 2020	ATNI	F	2,423	$50.68	$122,798	423,029 Direct	-0.57%	Disposed	-37.9% (price as of 2026-08-20)
March 8, 2020	ATNI	F	2,423	$55.52	$134,525	425,452 Direct	-0.57%	Disposed	-43.4% (price as of 2026-08-20)
March 7, 2020	ATNI	F	2,856	$55.52	$158,565	427,875 Direct	-0.66%	Disposed	-43.4% (price as of 2026-08-20)
Feb. 20, 2020	ATNI	S 10b5-1	726	$62.10	$45,085	134,139 Indirect	-0.54%	Disposed	-49.4% (price as of 2026-08-20)
Feb. 19, 2020	ATNI	S 10b5-1	709	$62.01	$43,965	134,865 Indirect	-0.52%	Disposed	-49.3% (price as of 2026-08-20)
Feb. 18, 2020	ATNI	S 10b5-1	2,240	$62.10	$139,104	135,574 Indirect	-1.63%	Disposed	-49.4% (price as of 2026-08-20)
Nov. 1, 2019	ATNI	S 10b5-1	1,838	$59.15	$108,718	137,814 Indirect	-1.32%	Disposed	-46.8% (price as of 2026-08-20)
Nov. 1, 2019	ATNI	S 10b5-1	1,495	$58.32	$87,188	139,652 Indirect	-1.06%	Disposed	-46.1% (price as of 2026-08-20)
March 17, 2019	ATNI	F	1,952	$55.39	$108,121	431,431 Direct	-0.45%	Disposed	-43.2% (price as of 2026-08-20)
March 13, 2019	ATNI	A	25,000	—	—	433,383 Direct	+6.12%	Acquired	(price as of 2026-08-20)
March 9, 2019	ATNI	F	2,036	$55.16	$112,306	408,383 Direct	-0.50%	Disposed	-43.0% (price as of 2026-08-20)
March 8, 2019	ATNI	F	2,036	$55.16	$112,306	410,419 Direct	-0.49%	Disposed	-43.0% (price as of 2026-08-20)
March 7, 2019	ATNI	F	2,401	$55.06	$132,199	412,455 Direct	-0.58%	Disposed	-42.9% (price as of 2026-08-20)
Nov. 30, 2018	ATNI	M	30,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 30, 2018	ATNI	M	7,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 30, 2018	ATNI	M	25,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 30, 2018	ATNI	F	43,768	$84.56	$3,701,022	416,356 Direct	-9.51%	Disposed	-62.8% (price as of 2026-08-20)
Nov. 30, 2018	ATNI	M	30,000	$37.36	$1,120,800	460,124 Direct	+6.97%	Acquired	-15.8% (price as of 2026-08-20)
Nov. 30, 2018	ATNI	M	7,500	$32.96	$247,200	430,124 Direct	+1.77%	Acquired	-4.6% (price as of 2026-08-20)
Nov. 30, 2018	ATNI	M	25,000	$46.85	$1,171,250	422,624 Direct	+6.29%	Acquired	-32.9% (price as of 2026-08-20)
Sept. 4, 2018	ATNI	S 10b5-1	1,000	$72.69	$72,690	141,647 Indirect	-0.70%	Disposed	-56.7% (price as of 2026-08-20)
Sept. 4, 2018	ATNI	S 10b5-1	1,000	$72.69	$72,690	397,624 Direct	-0.25%	Disposed	-56.7% (price as of 2026-08-20)
Aug. 6, 2018	ATNI	S 10b5-1	1,000	$64.17	$64,170	142,647 Indirect	-0.70%	Disposed	-51.0% (price as of 2026-08-20)
Aug. 6, 2018	ATNI	S 10b5-1	4,000	$65.00	$260,000	398,624 Direct	-0.99%	Disposed	-51.6% (price as of 2026-08-20)
July 9, 2018	ATNI	S 10b5-1	1,000	$56.10	$56,100	143,647 Indirect	-0.69%	Disposed	-43.9% (price as of 2026-08-20)
June 13, 2018	ATNI	S	800	$53.38	$42,704	8,141 Indirect	-8.95%	Disposed	-41.1% (price as of 2026-08-20)
June 13, 2018	ATNI	S	800	$53.38	$42,704	7,741 Indirect	-9.37%	Disposed	-41.1% (price as of 2026-08-20)
June 13, 2018	ATNI	S	800	$53.38	$42,704	8,541 Indirect	-8.56%	Disposed	-41.1% (price as of 2026-08-20)
June 11, 2018	ATNI	S	2,000	$55.48	$110,960	144,647 Indirect	-1.36%	Disposed	-43.3% (price as of 2026-08-20)
March 20, 2018	ATNI	F	2,444	$60.27	$147,300	402,624 Direct	-0.60%	Disposed	-47.8% (price as of 2026-08-20)
March 17, 2018	ATNI	F	2,333	$60.15	$140,330	405,068 Direct	-0.57%	Disposed	-47.7% (price as of 2026-08-20)
March 9, 2018	ATNI	F	2,423	$60.24	$145,962	407,401 Direct	-0.59%	Disposed	-47.8% (price as of 2026-08-20)
March 8, 2018	ATNI	F	2,423	$61.23	$148,360	409,824 Direct	-0.59%	Disposed	-48.6% (price as of 2026-08-20)
March 7, 2018	ATNI	A	25,800	—	—	412,247 Direct	+6.68%	Acquired	(price as of 2026-08-20)
Dec. 13, 2017	ATNI	S	900	$55.36	$49,824	8,941 Indirect	-9.15%	Disposed	-43.2% (price as of 2026-08-20)
Dec. 13, 2017	ATNI	S	900	$55.36	$49,824	8,541 Indirect	-9.53%	Disposed	-43.2% (price as of 2026-08-20)
Dec. 13, 2017	ATNI	S	5,555	$55.36	$307,525	387,247 Direct	-1.41%	Disposed	-43.2% (price as of 2026-08-20)
March 27, 2017	ATNI	F	2,028	$70.92	$143,826	392,802 Direct	-0.51%	Disposed	-55.7% (price as of 2026-08-20)
March 20, 2017	ATNI	F	1,785	$73.49	$131,180	394,830 Direct	-0.45%	Disposed	-57.2% (price as of 2026-08-20)
March 17, 2017	ATNI	F	1,695	$73.93	$125,311	396,615 Direct	-0.43%	Disposed	-57.5% (price as of 2026-08-20)
March 9, 2017	ATNI	F	1,768	$68.51	$121,126	398,310 Direct	-0.44%	Disposed	-54.1% (price as of 2026-08-20)
March 8, 2017	ATNI	A	21,900	—	—	400,078 Direct	+5.79%	Acquired	(price as of 2026-08-20)
Aug. 18, 2016	ATNI	M	10,000	—	—	7,500 Direct	-57.14%	Disposed	(price as of 2026-08-20)
Aug. 18, 2016	ATNI	M	10,000	$32.96	$329,600	379,778 Direct	+2.70%	Acquired	-4.6% (price as of 2026-08-20)
July 11, 2016	ATNI	S 10b5-1	531	$80.46	$42,724	146,947 Indirect	-0.36%	Disposed	-60.9% (price as of 2026-08-20)
July 8, 2016	ATNI	S 10b5-1	550	$79.99	$43,994	147,478 Indirect	-0.37%	Disposed	-60.7% (price as of 2026-08-20)
July 7, 2016	ATNI	S 10b5-1	550	$79.73	$43,852	148,028 Indirect	-0.37%	Disposed	-60.6% (price as of 2026-08-20)
July 6, 2016	ATNI	S 10b5-1	550	$80.48	$44,264	148,578 Indirect	-0.37%	Disposed	-60.9% (price as of 2026-08-20)
July 5, 2016	ATNI	S 10b5-1	550	$77.88	$42,834	149,128 Indirect	-0.37%	Disposed	-59.6% (price as of 2026-08-20)
July 1, 2016	ATNI	S 10b5-1	550	$77.71	$42,740	149,678 Indirect	-0.37%	Disposed	-59.5% (price as of 2026-08-20)
July 1, 2016	ATNI	S 10b5-1	1,719	$77.34	$132,947	369,778 Direct	-0.46%	Disposed	-59.3% (price as of 2026-08-20)
June 3, 2016	ATNI	S 10b5-1	350	$72.88	$25,508	9,661 Indirect	-3.50%	Disposed	-56.8% (price as of 2026-08-20)
June 3, 2016	ATNI	S 10b5-1	350	$72.88	$25,508	8,961 Indirect	-3.76%	Disposed	-56.8% (price as of 2026-08-20)
June 3, 2016	ATNI	S 10b5-1	50	$72.88	$3,644	8,861 Indirect	-0.56%	Disposed	-56.8% (price as of 2026-08-20)
June 2, 2016	ATNI	S 10b5-1	550	$72.02	$39,611	10,011 Indirect	-5.21%	Disposed	-56.3% (price as of 2026-08-20)
June 2, 2016	ATNI	S 10b5-1	550	$72.02	$39,611	9,311 Indirect	-5.58%	Disposed	-56.3% (price as of 2026-08-20)
June 2, 2016	ATNI	S 10b5-1	550	$72.02	$39,611	8,911 Indirect	-5.81%	Disposed	-56.3% (price as of 2026-08-20)
April 21, 2016	ATNI	S 10b5-1	300	$72.00	$21,600	150,228 Indirect	-0.20%	Disposed	-56.3% (price as of 2026-08-20)

Showing latest 100 of 200 transactions

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
March 17, 2026	ATNI	Performance-Based Restricted Stock Units	Common Stock (13,524)	$0.00	—	13,524	Acquired
March 7, 2026	ATNI	Performance-Based Restricted Stock Units	Common Stock (25,000)	$0.00	March 7, 2026	25,000	Disposed
March 25, 2022	ATNI	Performance-Based Restricted Stock Units	Common Stock	$0.00	—	21,450	Acquired
March 9, 2021	ATNI	Performance -Based Restricted Stock Units	Common Stock	$0.00	—	19,350	Acquired
Nov. 30, 2018	ATNI	Employee Stock Option (right to buy)	Common Stock (30,000)	$37.36	March 22, 2022	30,000	Disposed
Nov. 30, 2018	ATNI	Employee Stock Option (right to buy)	Common Stock (7,500)	$32.96	March 15, 2021	7,500	Disposed
Nov. 30, 2018	ATNI	Employee Stock Option (right to buy)	Common Stock (25,000)	$46.85	Feb. 11, 2020	25,000	Disposed
Aug. 18, 2016	ATNI	Stock Option (Right to Buy)	Common stock (10,000)	$32.96	March 15, 2021	10,000	Disposed
Nov. 15, 2013	ATNI	Stock Option	Common Stock (17,500)	$32.96	March 15, 2021	17,500	Disposed
Aug. 2, 2013	ATNI	Common Stock	Common Stock (50,000)	$32.98	Sept. 17, 2017	50,000	Disposed
March 6, 2013	ATNI	Common Stock	Common Stock (20,000)	$23.78	Dec. 5, 2018	20,000	Disposed
Dec. 4, 2012	ATNI	Stock Option (right to buy)	Common Stock (8,800)	$18.70	Sept. 14, 2013	8,800	Disposed
March 22, 2012	ATNI	Stock Option (Right to Buy)	Common Stock (30,000)	$37.36	March 22, 2022	30,000	Acquired
Nov. 15, 2011	ATNI	Stock Option (right to buy)	Common Stock (16,200)	$18.70	Sept. 14, 2016	16,200	Acquired
March 15, 2011	ATNI	Stock Option (Right to Buy)	Common Stock (35,000)	$32.96	March 15, 2021	35,000	Acquired
Nov. 16, 2010	ATNI	Stock Option (Right to Buy)	Common Stock (5,000)	$18.70	Sept. 14, 2013	5,000	Disposed
June 10, 2010	ATNI	Stock Option (Right to Buy)	Common Stock (10,000)	$18.70	Sept. 14, 2016	10,000	Disposed
Feb. 11, 2010	ATNI	Stock Option (right to buy)	Common Stock (25,000)	$46.85	Feb. 11, 2020	25,000	Acquired
Dec. 5, 2008	ATNI	Stock Option (right to buy)	Common Stock (20,000)	$23.78	Dec. 5, 2018	20,000	Acquired
Sept. 17, 2007	ATNI	Stock Option (right to buy)	Common Stock (50,000)	$32.98	Sept. 17, 2017	50,000	Acquired
Sept. 14, 2006	ATNI	Stock Option (Right to Buy)	Common Stock (40,000)	$18.70	Sept. 14, 2013	40,000	Acquired

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

Compensation (DEF 14A)

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

ATNI

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2019	$630,000	—	$1,393,000	—	$525,000	—	$75,523	$2,623,523
2018	$615,000	—	$1,617,660	—	$554,000	—	$85,474	$2,872,134
2017	$600,000	$375,000	$1,495,770	—	—	—	$201,911	$2,672,681

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