John M Thaeder

CIK 1208429 · View on SEC EDGAR ↗

Insider

First SEC filing: Aug. 29, 2025 · Latest: Aug. 29, 2025

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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.

Insider at

ARTNA selling Aug. 28, 2025

Insider transactions

0 buys (P) 3 sells (S) Net: $-99,780 + 72 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

72 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Aug. 28, 2025	ARTNA	S	1,000	$33.37	$33,370	20,592 Direct	-4.63%	Disposed	5.5% (price as of 2026-08-20)
Aug. 22, 2025	ARTNA	S	1,000	$33.49	$33,490	21,592 Direct	-4.43%	Disposed	5.1% (price as of 2026-08-20)
Aug. 21, 2025	ARTNA	S	1,000	$32.92	$32,920	22,592 Direct	-4.24%	Disposed	6.9% (price as of 2026-08-20)
Dec. 14, 2023	ARTNA	S	2,500	$43.81	$109,525	23,592 Direct	-9.58%	Disposed	-19.7% (price as of 2026-08-20)
Nov. 21, 2023	ARTNA	S	200	$42.18	$8,436	26,092 Direct	-0.76%	Disposed	-16.5% (price as of 2026-08-20)
Sept. 20, 2023	ARTNA	S	500	$45.87	$22,935	26,292 Direct	-1.87%	Disposed	-23.3% (price as of 2026-08-20)
June 28, 2017	ARTNA	A	821	$38.06	$31,247	25,359 Direct	+3.35%	Acquired	-7.5% (price as of 2026-08-20)
June 28, 2017	ARTNA	A	831	$38.06	$31,628	25,369 Direct	+3.39%	Acquired	-7.5% (price as of 2026-08-20)
Sept. 15, 2015	ARTNA	X	1,277	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Sept. 15, 2015	ARTNA	S	1,277	$21.70	$27,711	23,900 Direct	-5.07%	Disposed	62.2% (price as of 2026-08-20)
Sept. 15, 2015	ARTNA	X	1,277	$19.70	$25,157	25,177 Direct	+5.34%	Acquired	78.7% (price as of 2026-08-20)
Sept. 14, 2015	ARTNA	X	5,044	—	—	1,277 Direct	-79.80%	Disposed	(price as of 2026-08-20)
Sept. 14, 2015	ARTNA	S	5,044	$21.70	$109,455	23,900 Direct	-17.43%	Disposed	62.2% (price as of 2026-08-20)
Sept. 14, 2015	ARTNA	X	5,044	$19.70	$99,367	28,944 Direct	+21.10%	Acquired	78.7% (price as of 2026-08-20)
Aug. 31, 2015	ARTNA	X	753	—	—	6,321 Direct	-10.64%	Disposed	(price as of 2026-08-20)
Aug. 31, 2015	ARTNA	S	753	$22.00	$16,566	23,900 Direct	-3.05%	Disposed	60.0% (price as of 2026-08-20)
Aug. 31, 2015	ARTNA	X	753	$19.70	$14,834	24,653 Direct	+3.15%	Acquired	78.7% (price as of 2026-08-20)
June 1, 2015	ARTNA	X	176	—	—	7,074 Direct	-2.43%	Disposed	(price as of 2026-08-20)
June 1, 2015	ARTNA	S	176	$21.70	$3,819	23,900 Direct	-0.73%	Disposed	62.2% (price as of 2026-08-20)
June 1, 2015	ARTNA	X	176	$19.70	$3,467	24,076 Direct	+0.74%	Acquired	78.7% (price as of 2026-08-20)
Dec. 22, 2014	ARTNA	X	4,000	—	—	7,250 Direct	-35.56%	Disposed	(price as of 2026-08-20)
Dec. 22, 2014	ARTNA	S	200	$22.07	$4,414	23,551 Direct	-0.84%	Disposed	59.5% (price as of 2026-08-20)
Dec. 22, 2014	ARTNA	S	400	$22.07	$8,828	23,751 Direct	-1.66%	Disposed	59.5% (price as of 2026-08-20)
Dec. 22, 2014	ARTNA	S	100	$22.08	$2,208	24,151 Direct	-0.41%	Disposed	59.4% (price as of 2026-08-20)
Dec. 22, 2014	ARTNA	S	3,300	$22.06	$72,798	24,251 Direct	-11.98%	Disposed	59.6% (price as of 2026-08-20)
Dec. 22, 2014	ARTNA	X	4,000	$19.70	$78,800	27,551 Direct	+16.98%	Acquired	78.7% (price as of 2026-08-20)
Nov. 18, 2014	ARTNA	S	370	$22.45	$8,306	23,551 Direct	-1.55%	Disposed	56.8% (price as of 2026-08-20)
Nov. 18, 2014	ARTNA	S	225	$22.46	$5,054	23,920 Direct	-0.93%	Disposed	56.7% (price as of 2026-08-20)
June 19, 2014	ARTNA	G	300	—	—	24,145 Direct	-1.23%	Disposed	(price as of 2026-08-20)
May 20, 2014	ARTNA	X	800	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
May 20, 2014	ARTNA	X	800	$16.13	$12,904	24,445 Direct	+3.38%	Acquired	118.2% (price as of 2026-08-20)
May 16, 2014	ARTNA	X	2,575	—	—	800 Direct	-76.30%	Disposed	(price as of 2026-08-20)
May 16, 2014	ARTNA	S	2,575	$21.21	$54,616	23,645 Direct	-9.82%	Disposed	66.0% (price as of 2026-08-20)
May 16, 2014	ARTNA	X	2,575	$16.13	$41,535	26,220 Direct	+10.89%	Acquired	118.2% (price as of 2026-08-20)
April 9, 2014	ARTNA	X	500	—	—	3,375 Direct	-12.90%	Disposed	(price as of 2026-08-20)
April 9, 2014	ARTNA	X	500	$16.13	$8,065	23,645 Direct	+2.16%	Acquired	118.2% (price as of 2026-08-20)
March 21, 2014	ARTNA	X	2,875	$16.13	$46,374	26,020 Direct	+12.42%	Acquired	118.2% (price as of 2026-08-20)
March 21, 2014	ARTNA	S	2,875	$22.40	$64,400	23,145 Direct	-11.05%	Disposed	57.1% (price as of 2026-08-20)
March 21, 2014	ARTNA	X	2,875	—	—	3,875 Direct	-42.59%	Disposed	(price as of 2026-08-20)
Dec. 13, 2012	ARTNA	O	6,750	$14.85	$100,238	0 Direct	-100.00%	Disposed	137.0% (price as of 2026-08-20)
Dec. 13, 2012	ARTNA	O	6,750	$14.85	$100,238	22,511 Direct	+42.83%	Acquired	137.0% (price as of 2026-08-20)
Dec. 13, 2012	ARTNA	D	4,753	$21.09	$100,241	15,761 Direct	-23.17%	Disposed	66.9% (price as of 2026-08-20)
March 16, 2012	ARTNA	X	6,750	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 16, 2012	ARTNA	S	5,250	$19.10	$100,275	20,514 Direct	-20.38%	Disposed	84.3% (price as of 2026-08-20)
March 16, 2012	ARTNA	X	6,750	$12.40	$83,700	25,764 Direct	+35.50%	Acquired	183.9% (price as of 2026-08-20)
March 16, 2012	ARTNA	S	200	$19.15	$3,830	0 Indirect	-100.00%	Disposed	83.8% (price as of 2026-08-20)
Nov. 10, 2010	ARTNA	S	2,000	$18.71	$37,420	17,536 Direct	-10.24%	Disposed	88.1% (price as of 2026-08-20)
Nov. 10, 2010	ARTNA	S	750	$18.76	$14,070	16,786 Direct	-4.28%	Disposed	87.6% (price as of 2026-08-20)
Nov. 10, 2010	ARTNA	X	4,750	—	—	2,000 Direct	-70.37%	Disposed	(price as of 2026-08-20)
Nov. 10, 2010	ARTNA	S	2,000	$18.65	$37,300	19,536 Direct	-9.29%	Disposed	88.7% (price as of 2026-08-20)
Nov. 10, 2010	ARTNA	X	4,750	$10.84	$51,490	21,536 Direct	+28.30%	Acquired	224.7% (price as of 2026-08-20)
Nov. 10, 2010	ARTNA	X	2,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 10, 2010	ARTNA	X	2,000	$10.84	$21,680	18,786 Direct	+11.91%	Acquired	224.7% (price as of 2026-08-20)
Sept. 22, 2009	ARTNA	X	3,207	$10.28	$32,968	0 Direct	-100.00%	Disposed	242.4% (price as of 2026-08-20)
Sept. 22, 2009	ARTNA	S	3,207	$17.16	$55,032	16,786 Direct	-16.04%	Disposed	105.1% (price as of 2026-08-20)
Sept. 22, 2009	ARTNA	X	3,207	$10.28	$32,968	19,993 Direct	+19.11%	Acquired	242.4% (price as of 2026-08-20)
March 4, 2009	ARTNA	X	1,000	$10.28	$10,280	3,207 Direct	-23.77%	Disposed	242.4% (price as of 2026-08-20)
March 4, 2009	ARTNA	X	1,000	$10.28	$10,280	16,786 Direct	+6.33%	Acquired	242.4% (price as of 2026-08-20)
Jan. 16, 2007	ARTNA	X	4,500	$7.61	$34,245	0 Direct	-100.00%	Disposed	362.5% (price as of 2026-08-20)
Jan. 16, 2007	ARTNA	X	2,543	$10.28	$26,142	4,207 Direct	-37.67%	Disposed	242.4% (price as of 2026-08-20)
Jan. 16, 2007	ARTNA	X	2,669	$9.33	$24,902	4 Direct	-99.85%	Disposed	277.3% (price as of 2026-08-20)
Jan. 16, 2007	ARTNA	X	2,543	$10.28	$26,142	14,786 Direct	+20.77%	Acquired	242.4% (price as of 2026-08-20)
Jan. 16, 2007	ARTNA	X	2,669	$9.33	$24,902	12,243 Direct	+27.88%	Acquired	277.3% (price as of 2026-08-20)
Jan. 16, 2007	ARTNA	X	4,500	$7.61	$34,245	9,574 Direct	+88.69%	Acquired	362.5% (price as of 2026-08-20)
Nov. 30, 2006	ARTNA	X	112	$9.33	$1,045	2,673 Direct	-4.02%	Disposed	277.3% (price as of 2026-08-20)
Nov. 30, 2006	ARTNA	X	112	$9.33	$1,045	5,074 Direct	+2.26%	Acquired	277.3% (price as of 2026-08-20)
Nov. 7, 2006	ARTNA	A	500	$18.49	$9,245	800 Indirect	+166.67%	Acquired	90.4% (price as of 2026-08-20)
Aug. 7, 2006	ARTNA	X	171	$9.33	$1,595	2,785 Direct	-5.78%	Disposed	277.3% (price as of 2026-08-20)
Aug. 7, 2006	ARTNA	X	171	$9.33	$1,595	4,962 Direct	+3.57%	Acquired	277.3% (price as of 2026-08-20)
May 30, 2006	ARTNA	S	850	$30.50	$25,925	3,194 Direct	-21.02%	Disposed	73.1% (price as of 2026-08-20)
May 22, 2006	ARTNA	S	150	$30.50	$4,575	4,044 Direct	-3.58%	Disposed	73.1% (price as of 2026-08-20)
May 19, 2006	ARTNA	S	1,000	$30.00	$30,000	4,194 Direct	-19.25%	Disposed	76.0% (price as of 2026-08-20)
May 15, 2006	ARTNA	S	1,000	$31.67	$31,670	5,194 Direct	-16.14%	Disposed	66.7% (price as of 2026-08-20)
May 8, 2006	ARTNA	A	750	$31.60	$23,700	6,194 Direct	+13.78%	Acquired	67.1% (price as of 2026-08-20)
May 1, 2006	ARTNA	X	98	$14.00	$1,372	1,971 Direct	-4.74%	Disposed	277.1% (price as of 2026-08-20)
May 1, 2006	ARTNA	X	98	$14.00	$1,372	5,444 Direct	+1.83%	Acquired	277.1% (price as of 2026-08-20)
Feb. 8, 2006	ARTNA	X	97	$14.00	$1,358	2,069 Direct	-4.48%	Disposed	277.1% (price as of 2026-08-20)
Feb. 8, 2006	ARTNA	X	97	$14.00	$1,358	5,346 Direct	+1.85%	Acquired	277.1% (price as of 2026-08-20)
Dec. 20, 2005	ARTNA	A	7,500	$29.55	$221,625	7,500 Direct	—	Acquired	78.7% (price as of 2026-08-20)
Nov. 1, 2005	ARTNA	X	89	$14.00	$1,246	5,249 Direct	+1.72%	Acquired	277.1% (price as of 2026-08-20)
Nov. 1, 2005	ARTNA	X	89	$14.00	$1,246	2,166 Direct	-3.95%	Disposed	277.1% (price as of 2026-08-20)
July 19, 2005	ARTNA	X	1,000	$14.00	$14,000	5,160 Direct	+24.04%	Acquired	277.1% (price as of 2026-08-20)
July 19, 2005	ARTNA	X	1,000	$14.00	$14,000	2,255 Direct	-30.72%	Disposed	277.1% (price as of 2026-08-20)
June 9, 2005	ARTNA	O	73	$14.00	$1,022	3,255 Direct	-2.19%	Disposed	277.1% (price as of 2026-08-20)
June 9, 2005	ARTNA	O	73	$14.00	$1,022	4,160 Direct	+1.79%	Acquired	277.1% (price as of 2026-08-20)
May 2, 2005	ARTNA	O	70	$14.00	$980	3,328 Direct	-2.06%	Disposed	277.1% (price as of 2026-08-20)
May 2, 2005	ARTNA	O	70	$14.00	$980	4,087 Direct	+1.74%	Acquired	277.1% (price as of 2026-08-20)
Feb. 9, 2005	ARTNA	O	59	$14.00	$826	3,398 Direct	-1.71%	Disposed	277.1% (price as of 2026-08-20)
Feb. 9, 2005	ARTNA	O	59	$14.00	$826	4,017 Direct	+1.49%	Acquired	277.1% (price as of 2026-08-20)
Feb. 2, 2005	ARTNA	A	750	$28.11	$21,082	3,958 Direct	+23.38%	Acquired	87.8% (price as of 2026-08-20)
Nov. 8, 2004	ARTNA	O	55	$14.00	$770	3,457 Direct	-1.57%	Disposed	277.1% (price as of 2026-08-20)
Nov. 8, 2004	ARTNA	O	55	$14.00	$770	3,208 Direct	+1.74%	Acquired	277.1% (price as of 2026-08-20)
Aug. 2, 2004	ARTNA	O	55	$14.00	$770	3,512 Direct	-1.54%	Disposed	277.1% (price as of 2026-08-20)
Aug. 2, 2004	ARTNA	O	55	$14.00	$770	3,153 Direct	+1.78%	Acquired	277.1% (price as of 2026-08-20)
May 26, 2004	ARTNA	A	4,500	$24.20	$108,900	4,500 Direct	—	Acquired	118.2% (price as of 2026-08-20)
April 30, 2004	ARTNA	O	105	$14.00	$1,470	3,567 Direct	-2.86%	Disposed	277.1% (price as of 2026-08-20)
April 30, 2004	ARTNA	O	105	$14.00	$1,470	3,098 Direct	+3.51%	Acquired	277.1% (price as of 2026-08-20)
Nov. 4, 2003	ARTNA	O	39	$14.00	$546	3,672 Direct	-1.05%	Disposed	277.1% (price as of 2026-08-20)
Nov. 4, 2003	ARTNA	O	39	$14.00	$546	2,243 Direct	+1.77%	Acquired	277.1% (price as of 2026-08-20)
Oct. 29, 2003	ARTNA	A	750	$26.30	$19,725	2,954 Direct	+34.03%	Acquired	100.8% (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
Sept. 15, 2015	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (1,277)	$19.70	Dec. 20, 2015	1,277	Disposed
Sept. 14, 2015	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (5,044)	$19.70	Dec. 20, 2015	5,044	Disposed
Aug. 31, 2015	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (753)	$19.70	Dec. 20, 2015	753	Disposed
June 1, 2015	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (176)	$19.70	Dec. 20, 2015	176	Disposed
Dec. 22, 2014	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (4,000)	$19.70	Dec. 20, 2015	4,000	Disposed
May 20, 2014	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (800)	$16.13	May 26, 2014	800	Disposed
May 16, 2014	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (2,575)	$16.13	May 26, 2014	2,575	Disposed
April 9, 2014	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (500)	$16.13	May 26, 2014	500	Disposed
March 21, 2014	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (2,875)	$16.13	May 26, 2014	2,875	Disposed
Dec. 13, 2012	ARTNA	Incentive Stock Option (Right to Buy)	Class A Non-voting Common Stock (6,750)	$14.85	May 21, 2013	6,750	Disposed
March 16, 2012	ARTNA	Non-qualified Stock Option (Right to Buy)	Class A Non-voting Common Stock (6,750)	$12.40	June 5, 2012	6,750	Disposed
Nov. 10, 2010	ARTNA	Incentive Stock Option (Right to Buy)	Class A Non-voting Common Stock (4,750)	$10.84	May 30, 2011	4,750	Disposed
Nov. 10, 2010	ARTNA	Incentive Stock Option (Right to Buy)	Class A Non-voting Common Stock (2,000)	$10.84	May 30, 2011	2,000	Disposed
Sept. 22, 2009	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (3,207)	$10.28	May 31, 2010	3,207	Disposed
March 4, 2009	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (1,000)	$10.28	May 31, 2010	1,000	Disposed
Jan. 16, 2007	ARTNA	Non-Qualified Stock Option (right to buy)	Class A Non-Voting Common Stock (4,500)	$7.61	May 27, 2008	4,500	Disposed
Jan. 16, 2007	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (2,543)	$10.28	May 31, 2010	2,543	Disposed
Jan. 16, 2007	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (2,669)	$9.33	May 18, 2009	2,669	Disposed
Nov. 30, 2006	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (112)	$9.33	May 18, 2009	112	Disposed
Aug. 7, 2006	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (171)	$9.33	May 18, 2009	171	Disposed
May 1, 2006	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (98)	$14.00	May 18, 2009	98	Disposed
Feb. 8, 2006	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (97)	$14.00	May 18, 2009	97	Disposed
Dec. 20, 2005	ARTNA	Non-Qualified Stock Option (right to buy)	Class A Non-Voting Common Stock (7,500)	$29.55	Dec. 20, 2015	7,500	Acquired
Nov. 1, 2005	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (89)	$14.00	May 18, 2009	89	Disposed
July 19, 2005	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (1,000)	$14.00	May 18, 2009	1,000	Disposed
June 9, 2005	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (73)	$14.00	May 18, 2009	73	Disposed
May 2, 2005	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (70)	$14.00	May 18, 2009	70	Disposed
Feb. 9, 2005	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (59)	$14.00	May 18, 2009	59	Disposed
Nov. 8, 2004	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (55)	$14.00	May 18, 2009	55	Disposed
Aug. 2, 2004	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (55)	$14.00	May 18, 2009	55	Disposed
May 26, 2004	ARTNA	Non-Qualified Stock Option (right to buy)	Class A Non-Voting Common Stock (4,500)	$24.20	May 26, 2014	4,500	Acquired
April 30, 2004	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (105)	$14.00	May 18, 2009	105	Disposed
Nov. 4, 2003	ARTNA	Incentive Stock Option (right to buy)	Class A Non-Voting Common Stock (39)	$14.00	May 18, 2009	39	Disposed

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