Michael G Atieh

Insider

First SEC filing: March 18, 2026 · Latest: March 18, 2026

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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.
Initial holdings The stakes this person held when they first started reporting.

Insider at

Insider transactions

0 buys (P) 1 sells (S) Net: $-190,468 + 63 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

63 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 16, 2026	IMTX	A	48,000	—	—	48,000 Direct	—	Acquired	(price as of 2026-08-21)
May 21, 2026	CB	S	578	$329.53	$190,468	40,014 Direct	-1.42%	Disposed	4.2% (price as of 2026-08-21)
May 21, 2026	CB	F	193	$330.26	$63,740	40,592 Direct	-0.47%	Disposed	4.0% (price as of 2026-08-21)
May 21, 2026	CB	A	681	—	—	40,785 Direct	+1.70%	Acquired	(price as of 2026-08-21)
June 16, 2025	CB	S	538	$287.56	$154,707	39,474 Direct	-1.34%	Disposed	19.5% (price as of 2026-08-21)
May 15, 2025	CB	F	180	$292.05	$52,569	40,012 Direct	-0.45%	Disposed	17.6% (price as of 2026-08-21)
May 15, 2025	CB	A	771	—	—	40,192 Direct	+1.96%	Acquired	(price as of 2026-08-21)
Sept. 3, 2024	CB	S	261	$287.49	$75,035	39,172 Direct	-0.66%	Disposed	19.5% (price as of 2026-08-21)
May 17, 2024	CB	S	716	$269.70	$193,105	39,295 Direct	-1.79%	Disposed	27.4% (price as of 2026-08-21)
May 16, 2024	CB	F	239	$264.88	$63,306	40,011 Direct	-0.59%	Disposed	29.7% (price as of 2026-08-21)
May 16, 2024	CB	A	718	—	—	40,250 Direct	+1.82%	Acquired	(price as of 2026-08-21)
July 28, 2023	CB	S	750	$208.39	$156,292	38,933 Direct	-1.89%	Disposed	64.8% (price as of 2026-08-21)
May 17, 2023	CB	F	233	$198.93	$46,351	39,683 Direct	-0.58%	Disposed	72.7% (price as of 2026-08-21)
May 17, 2023	CB	A	955	—	—	39,916 Direct	+2.45%	Acquired	(price as of 2026-08-21)
May 20, 2022	CB	S	500	$203.49	$101,745	38,340 Direct	-1.29%	Disposed	68.8% (price as of 2026-08-21)
May 19, 2022	CB	F	271	$203.88	$55,251	38,840 Direct	-0.69%	Disposed	68.5% (price as of 2026-08-21)
May 19, 2022	CB	A	932	—	—	39,111 Direct	+2.44%	Acquired	(price as of 2026-08-21)
Aug. 18, 2021	CB	S	2,944	$186.20	$548,173	37,556 Direct	-7.27%	Disposed	84.5% (price as of 2026-08-21)
May 20, 2021	CB	F	431	$166.16	$71,615	40,500 Direct	-1.05%	Disposed	106.7% (price as of 2026-08-21)
May 20, 2021	CB	A	1,083	—	—	40,931 Direct	+2.72%	Acquired	(price as of 2026-08-21)
Feb. 10, 2021	CB	S	1,000	$165.36	$165,360	39,041 Direct	-2.50%	Disposed	107.7% (price as of 2026-08-21)
May 20, 2020	CB	F	309	$104.61	$32,324	40,041 Direct	-0.77%	Disposed	228.4% (price as of 2026-08-21)
May 20, 2020	CB	A	1,721	—	—	40,350 Direct	+4.46%	Acquired	(price as of 2026-08-21)
Nov. 11, 2019	CB	S	1,500	$151.12	$226,680	38,232 Direct	-3.78%	Disposed	127.3% (price as of 2026-08-21)
June 7, 2019	ECOR	A	63,291	—	—	63,291 Direct	—	Acquired	(price as of 2026-08-21)
May 16, 2019	CB	F	316	$145.62	$46,016	39,387 Direct	-0.80%	Disposed	135.9% (price as of 2026-08-21)
May 16, 2019	CB	A	1,236	—	—	39,703 Direct	+3.21%	Acquired	(price as of 2026-08-21)
May 9, 2019	CB	S	341	$141.86	$48,374	0 Indirect	-100.00%	Disposed	142.1% (price as of 2026-08-21)
May 9, 2019	CB	S	1,659	$141.87	$235,362	38,467 Direct	-4.13%	Disposed	142.1% (price as of 2026-08-21)
Nov. 28, 2018	CB	S	1,200	$133.27	$159,924	39,749 Direct	-2.93%	Disposed	157.7% (price as of 2026-08-21)
June 4, 2018	CB	S	920	$130.86	$120,391	40,561 Direct	-2.22%	Disposed	162.5% (price as of 2026-08-21)
May 17, 2018	CB	F	307	$134.45	$41,276	41,481 Direct	-0.73%	Disposed	155.5% (price as of 2026-08-21)
May 17, 2018	CB	A	1,264	—	—	41,134 Direct	+3.17%	Acquired	(price as of 2026-08-21)
May 18, 2017	CB	F	321	$138.56	$44,478	39,870 Direct	-0.80%	Disposed	147.9% (price as of 2026-08-21)
May 18, 2017	CB	A	1,227	—	—	39,847 Direct	+3.18%	Acquired	(price as of 2026-08-21)
Nov. 11, 2016	CB	G	1,800	—	—	38,620 Direct	-4.45%	Disposed	(price as of 2026-08-21)
May 19, 2016	CB	F	655	$124.85	$81,777	40,056 Direct	-1.61%	Disposed	175.1% (price as of 2026-08-21)
May 19, 2016	CB	A	1,282	—	—	39,931 Direct	+3.32%	Acquired	(price as of 2026-08-21)
May 21, 2015	CB	F	391	$108.90	$42,580	38,649 Direct	-1.00%	Disposed	215.4% (price as of 2026-08-21)
May 21, 2015	CB	A	2,617	—	—	38,277 Direct	+7.34%	Acquired	(price as of 2026-08-21)
Sept. 5, 2014	CB	S	5,000	$105.95	$529,750	35,660 Direct	-12.30%	Disposed	224.2% (price as of 2026-08-21)
June 3, 2014	TBPH	A	12,000	—	—	12,000 Direct	—	Acquired	(price as of 2026-08-21)
June 3, 2014	TBPH	A	12,000	—	—	12,000 Direct	—	Acquired	(price as of 2026-08-21)
May 15, 2014	CB	F	380	$102.29	$38,870	40,660 Direct	-0.93%	Disposed	235.8% (price as of 2026-08-21)
May 15, 2014	CB	A	1,564	—	—	40,306 Direct	+4.04%	Acquired	(price as of 2026-08-21)
May 16, 2013	CB	F	465	$92.11	$42,831	38,742 Direct	-1.19%	Disposed	272.9% (price as of 2026-08-21)
May 16, 2013	CB	A	1,520	—	—	38,858 Direct	+4.07%	Acquired	(price as of 2026-08-21)
Nov. 1, 2012	CB	G	2,000	—	—	341 Indirect	-85.43%	Disposed	(price as of 2026-08-21)
Nov. 1, 2012	CB	G	2,000	—	—	37,338 Direct	-5.08%	Disposed	(price as of 2026-08-21)
Nov. 1, 2012	CB	S	4,000	$78.90	$315,600	39,338 Direct	-9.23%	Disposed	335.4% (price as of 2026-08-21)
Nov. 1, 2012	CB	M	4,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
Nov. 1, 2012	CB	G	2,000	—	—	341 Indirect	-85.43%	Disposed	(price as of 2026-08-21)
Nov. 1, 2012	CB	G	2,000	—	—	38,094 Direct	-4.99%	Disposed	(price as of 2026-08-21)
Nov. 1, 2012	CB	S	4,000	$78.90	$315,600	40,094 Direct	-9.07%	Disposed	335.4% (price as of 2026-08-21)
Nov. 1, 2012	CB	M	4,000	$34.45	$137,800	43,715 Direct	+10.07%	Acquired	897.1% (price as of 2026-08-21)
May 16, 2012	CB	F	505	$75.26	$38,006	39,715 Direct	-1.26%	Disposed	356.4% (price as of 2026-08-21)
May 16, 2012	CB	A	1,860	—	—	39,162 Direct	+4.99%	Acquired	(price as of 2026-08-21)
April 30, 2012	CB	M	4,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
April 30, 2012	CB	S	4,000	$75.79	$303,160	37,302 Direct	-9.68%	Disposed	353.2% (price as of 2026-08-21)
April 30, 2012	CB	M	4,000	$33.39	$133,560	41,302 Direct	+10.72%	Acquired	928.8% (price as of 2026-08-21)
May 18, 2011	CB	F	663	$69.35	$45,979	37,302 Direct	-1.75%	Disposed	395.3% (price as of 2026-08-21)
May 18, 2011	CB	A	2,019	—	—	37,333 Direct	+5.72%	Acquired	(price as of 2026-08-21)
Feb. 9, 2011	CB	M	6,000	$35.25	$211,500	41,314 Direct	+16.99%	Acquired	874.5% (price as of 2026-08-21)
Feb. 9, 2011	CB	S	6,000	$63.84	$383,040	35,314 Direct	-14.52%	Disposed	438.1% (price as of 2026-08-21)
Feb. 9, 2011	CB	M	6,000	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 19, 2010	CB	F	1,199	$52.83	$63,343	35,314 Direct	-3.28%	Disposed	550.2% (price as of 2026-08-21)
May 19, 2010	CB	A	2,650	—	—	36,005 Direct	+7.94%	Acquired	(price as of 2026-08-21)
Aug. 13, 2009	CB	A	4,794	—	—	33,355 Direct	+16.79%	Acquired	(price as of 2026-08-21)
Dec. 5, 2008	CB	G	2,535	—	—	27,934 Direct	-8.32%	Disposed	(price as of 2026-08-21)
Dec. 5, 2008	CB	G	2,465	—	—	1,535 Indirect	-61.62%	Disposed	(price as of 2026-08-21)
Aug. 15, 2008	CB	A	320	—	—	30,469 Direct	+1.06%	Acquired	(price as of 2026-08-21)
July 14, 2008	CB	A	4,470	—	—	30,017 Direct	+17.50%	Acquired	(price as of 2026-08-21)
Dec. 5, 2007	CB	G	875	—	—	22,341 Direct	-3.77%	Disposed	(price as of 2026-08-21)
May 18, 2007	CB	S	200	$61.93	$12,386	23,025 Direct	-0.86%	Disposed	454.7% (price as of 2026-08-21)
May 18, 2007	CB	S	200	$61.92	$12,384	22,154 Direct	-0.89%	Disposed	454.7% (price as of 2026-08-21)
May 18, 2007	CB	S	200	$61.91	$12,382	22,354 Direct	-0.89%	Disposed	454.8% (price as of 2026-08-21)
May 18, 2007	CB	S	400	$61.90	$24,760	22,554 Direct	-1.74%	Disposed	454.9% (price as of 2026-08-21)
May 18, 2007	CB	S	1,400	$61.89	$86,646	22,954 Direct	-5.75%	Disposed	455.0% (price as of 2026-08-21)
May 18, 2007	CB	S	600	$61.88	$37,128	24,354 Direct	-2.40%	Disposed	455.1% (price as of 2026-08-21)
May 17, 2007	CB	A	3,582	—	—	24,954 Direct	+16.76%	Acquired	(price as of 2026-08-21)
May 18, 2006	CB	A	2,099	—	—	21,373 Direct	+10.89%	Acquired	(price as of 2026-08-21)
Nov. 11, 2005	CB	S	1,600	$55.65	$89,040	19,134 Direct	-7.72%	Disposed	517.3% (price as of 2026-08-21)
May 26, 2005	CB	A	2,301	—	—	20,581 Direct	+12.59%	Acquired	(price as of 2026-08-21)
Aug. 5, 2004	CB	G	1,290	—	—	18,066 Direct	-6.66%	Disposed	(price as of 2026-08-21)
May 27, 2004	CB	A	241	$41.50	$10,002	19,291 Direct	+1.27%	Acquired	727.7% (price as of 2026-08-21)
May 27, 2004	CB	A	2,169	$41.50	$90,014	18,842 Direct	+13.01%	Acquired	727.7% (price as of 2026-08-21)
May 27, 2004	CB	A	241	$41.50	$10,002	19,083 Direct	+1.28%	Acquired	727.7% (price as of 2026-08-21)
May 27, 2004	CB	A	2,169	$41.50	$90,014	18,842 Direct	+13.01%	Acquired	727.7% (price as of 2026-08-21)

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
June 16, 2026	IMTX	Stock Option (Right to Buy)	Ordinary Shares (48,000)	$9.09	June 15, 2036	48,000	Acquired
June 7, 2019	ECOR	Stock Option (Right to Buy)	Common Stock (63,291)	$2.24	June 8, 2029	63,291	Acquired
June 3, 2014	TBPH	Stock Option (Right to Buy)	Common Stock (12,000)	$23.51	June 2, 2024	12,000	Acquired
June 3, 2014	TBPH	Stock Option (Right to Buy)	Common Stock (12,000)	$23.51	June 2, 2024	12,000	Acquired
Nov. 1, 2012	CB	Options to Acquire	Common Shares (4,000)	$34.35	May 15, 2013	4,000	Disposed
April 30, 2012	CB	Options to Acquire	Common Shares (4,000)	$33.39	May 16, 2012	4,000	Disposed
Feb. 9, 2011	CB	Options to Acquire	Common Shares (6,000)	$35.25	May 11, 2011	6,000	Disposed

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

Initial ownership (Form 3) 9 holdings

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

Date	Ticker	Security	Shares	Ownership
March 18, 2026	IMTX	Stock Option (Right to Buy)→ Ordinary Shares (25,000)	25,000	Direct
March 18, 2026	IMTX	Stock Option (Right to Buy)→ Ordinary Shares (15,000)	15,000	Direct
March 18, 2026	IMTX	Stock Option (Right to Buy)→ Ordinary Shares (25,000)	25,000	Direct
March 18, 2026	IMTX	Stock Option (Right to Buy)→ Ordinary Shares (25,000)	25,000	Direct
March 18, 2026	IMTX	Stock Option (Right to Buy)→ Ordinary Shares (40,000)	40,000	Direct
March 18, 2026	IMTX	Stock Option (Right to Buy)→ Ordinary Shares (41,500)	41,500	Direct
June 21, 2018	ECOR	Common Stock	13,333	Direct
June 21, 2018	ECOR	Common Stock	55,556	Indirect
June 21, 2018	ECOR	Warrant→ Common Stock (3,968)	3,968	Indirect