John W. Pietrowicz

Insider

First SEC filing: June 11, 2026 · Latest: June 11, 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.
Compensation Executive pay disclosed in company proxy statements.

Insider at

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 80 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

80 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
June 9, 2026	MRX	A	2,070	—	—	23,771 Direct	+9.54%	Acquired	(price as of 2026-08-20)
June 1, 2026	MRX	F	558	$52.94	$29,541	21,701 Direct	-2.51%	Disposed	32.5% (price as of 2026-08-20)
Sept. 16, 2022	CME	F	387	$191.56	$74,134	55,238 Direct	-0.70%	Disposed	40.5% (price as of 2026-08-20)
Sept. 15, 2022	CME	A	4,716	—	—	55,625 Direct	+9.26%	Acquired	(price as of 2026-08-20)
Sept. 15, 2022	CME	F	958	$190.77	$182,758	50,909 Direct	-1.85%	Disposed	41.1% (price as of 2026-08-20)
Sept. 14, 2022	CME	F	446	$191.30	$85,320	51,867 Direct	-0.85%	Disposed	40.7% (price as of 2026-08-20)
Sept. 14, 2022	CME	F	446	—	—	51,867 Direct	-0.85%	Disposed	(price as of 2026-08-20)
March 15, 2022	CME	F	1,331	$232.00	$308,792	52,313 Direct	-2.48%	Disposed	16.0% (price as of 2026-08-20)
March 15, 2022	CME	A	3,290	$232.00	$763,280	53,644 Direct	+6.53%	Acquired	16.0% (price as of 2026-08-20)
Sept. 16, 2021	CME	F	407	$188.69	$76,797	50,354 Direct	-0.80%	Disposed	42.6% (price as of 2026-08-20)
Sept. 15, 2021	CME	A	4,368	—	—	50,761 Direct	+9.42%	Acquired	(price as of 2026-08-20)
Sept. 15, 2021	CME	F	522	$188.96	$98,637	46,393 Direct	-1.11%	Disposed	42.4% (price as of 2026-08-20)
Sept. 15, 2021	CME	F	537	$188.96	$101,472	46,915 Direct	-1.13%	Disposed	42.4% (price as of 2026-08-20)
Sept. 14, 2021	CME	F	470	$188.85	$88,760	47,452 Direct	-0.98%	Disposed	42.5% (price as of 2026-08-20)
March 15, 2021	CME	F	3,806	$209.09	$795,797	47,922 Direct	-7.36%	Disposed	28.7% (price as of 2026-08-20)
March 15, 2021	CME	A	9,398	$209.09	$1,965,028	51,728 Direct	+22.20%	Acquired	28.7% (price as of 2026-08-20)
Dec. 1, 2020	CME	M	2,500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 1, 2020	CME	M	2,500	—	—	2,500 Direct	-50.00%	Disposed	(price as of 2026-08-20)
Dec. 1, 2020	CME	S 10b5-1	2,500	$180.00	$450,000	42,330 Direct	-5.58%	Disposed	49.5% (price as of 2026-08-20)
Dec. 1, 2020	CME	M	2,500	$54.37	$135,925	44,830 Direct	+5.91%	Acquired	394.9% (price as of 2026-08-20)
Dec. 1, 2020	CME	S 10b5-1	2,500	$180.00	$450,000	42,330 Direct	-5.58%	Disposed	49.5% (price as of 2026-08-20)
Dec. 1, 2020	CME	M	2,500	$54.37	$135,925	44,830 Direct	+5.91%	Acquired	394.9% (price as of 2026-08-20)
Sept. 16, 2020	CME	F	423	$170.20	$71,995	42,330 Direct	-0.99%	Disposed	58.1% (price as of 2026-08-20)
Sept. 15, 2020	CME	A	4,908	—	—	42,753 Direct	+12.97%	Acquired	(price as of 2026-08-20)
Sept. 15, 2020	CME	F	554	$168.10	$93,127	37,845 Direct	-1.44%	Disposed	60.1% (price as of 2026-08-20)
Sept. 15, 2020	CME	F	569	$168.10	$95,649	38,399 Direct	-1.46%	Disposed	60.1% (price as of 2026-08-20)
Sept. 14, 2020	CME	F	486	$166.08	$80,715	38,968 Direct	-1.23%	Disposed	62.0% (price as of 2026-08-20)
March 15, 2020	CME	A	6,176	—	—	39,454 Direct	+18.56%	Acquired	(price as of 2026-08-20)
March 15, 2020	CME	F	2,736	$182.01	$497,979	27,102 Direct	-9.17%	Disposed	47.8% (price as of 2026-08-20)
March 15, 2020	CME	A	6,176	—	—	29,838 Direct	+26.10%	Acquired	(price as of 2026-08-20)
March 15, 2020	CME	F	2,329	$182.01	$423,901	23,662 Direct	-8.96%	Disposed	47.8% (price as of 2026-08-20)
March 15, 2020	CME	A	6,176	—	—	25,991 Direct	-19.20%	Disposed	(price as of 2026-08-20)
Sept. 16, 2019	CME	A	3,984	—	—	32,167 Direct	+14.14%	Acquired	(price as of 2026-08-20)
Sept. 15, 2019	CME	F	591	$205.80	$121,628	28,183 Direct	-2.05%	Disposed	30.8% (price as of 2026-08-20)
Sept. 15, 2019	CME	F	614	$205.80	$126,361	28,774 Direct	-2.09%	Disposed	30.8% (price as of 2026-08-20)
Sept. 15, 2019	CME	F	453	$205.80	$93,227	29,388 Direct	-1.52%	Disposed	30.8% (price as of 2026-08-20)
Sept. 14, 2019	CME	F	513	$205.80	$105,575	29,841 Direct	-1.69%	Disposed	30.8% (price as of 2026-08-20)
Sept. 4, 2019	CME	S 10b5-1	2,500	$217.62	$544,050	30,354 Direct	-7.61%	Disposed	23.7% (price as of 2026-08-20)
July 9, 2019	CME	S 10b5-1	2,500	$201.30	$503,250	32,854 Direct	-7.07%	Disposed	33.7% (price as of 2026-08-20)
April 3, 2019	CME	S 10b5-1	2,500	$168.27	$420,675	35,354 Direct	-6.60%	Disposed	59.9% (price as of 2026-08-20)
March 16, 2019	CME	F	128	$170.14	$21,778	37,854 Direct	-0.34%	Disposed	58.2% (price as of 2026-08-20)
March 15, 2019	CME	F	2,093	$170.14	$356,103	37,982 Direct	-5.22%	Disposed	58.2% (price as of 2026-08-20)
March 15, 2019	CME	A	4,724	—	—	40,075 Direct	+13.36%	Acquired	(price as of 2026-08-20)
March 15, 2019	CME	F	2,093	$170.14	$356,103	35,351 Direct	-5.59%	Disposed	58.2% (price as of 2026-08-20)
March 15, 2019	CME	A	4,724	—	—	37,444 Direct	+14.44%	Acquired	(price as of 2026-08-20)
Jan. 2, 2019	CME	M	1,740	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 2, 2019	CME	M	4,160	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 2, 2019	CME	M	12,060	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Jan. 2, 2019	CME	S 10b5-1	4,160	$186.98	$777,837	32,720 Direct	-11.28%	Disposed	43.9% (price as of 2026-08-20)
Jan. 2, 2019	CME	M	4,160	$56.87	$236,579	36,880 Direct	+12.71%	Acquired	373.2% (price as of 2026-08-20)
Jan. 2, 2019	CME	S 10b5-1	1,740	$186.90	$325,206	32,720 Direct	-5.05%	Disposed	44.0% (price as of 2026-08-20)
Jan. 2, 2019	CME	M	1,740	$62.83	$109,324	34,460 Direct	+5.32%	Acquired	328.3% (price as of 2026-08-20)
Jan. 2, 2019	CME	S 10b5-1	12,060	$186.90	$2,254,014	32,720 Direct	-26.93%	Disposed	44.0% (price as of 2026-08-20)
Jan. 2, 2019	CME	M	12,060	$54.30	$654,858	44,780 Direct	+36.86%	Acquired	395.6% (price as of 2026-08-20)
Oct. 11, 2018	CME	S 10b5-1	2,500	$179.86	$449,650	32,720 Direct	-7.10%	Disposed	49.6% (price as of 2026-08-20)
Sept. 15, 2018	CME	F	315	$173.15	$54,542	35,220 Direct	-0.89%	Disposed	55.4% (price as of 2026-08-20)
Sept. 15, 2018	CME	F	604	$173.15	$104,583	35,535 Direct	-1.67%	Disposed	55.4% (price as of 2026-08-20)
Sept. 15, 2018	CME	F	624	$173.15	$108,046	36,139 Direct	-1.70%	Disposed	55.4% (price as of 2026-08-20)
Sept. 15, 2018	CME	F	458	$173.15	$79,303	36,763 Direct	-1.23%	Disposed	55.4% (price as of 2026-08-20)
Sept. 14, 2018	CME	A	4,764	—	—	37,221 Direct	+14.68%	Acquired	(price as of 2026-08-20)
July 10, 2018	CME	S 10b5-1	2,500	$164.11	$410,275	32,457 Direct	-7.15%	Disposed	64.0% (price as of 2026-08-20)
April 10, 2018	CME	S 10b5-1	2,500	$161.02	$402,550	34,957 Direct	-6.67%	Disposed	67.1% (price as of 2026-08-20)
March 16, 2018	CME	F	132	$165.12	$21,796	37,457 Direct	-0.35%	Disposed	63.0% (price as of 2026-08-20)
March 15, 2018	CME	F	2,337	$165.66	$387,147	37,589 Direct	-5.85%	Disposed	62.4% (price as of 2026-08-20)
March 15, 2018	CME	F	1,107	$165.66	$183,386	39,926 Direct	-2.70%	Disposed	62.4% (price as of 2026-08-20)
March 15, 2018	CME	A	6,160	—	—	41,033 Direct	+17.66%	Acquired	(price as of 2026-08-20)
March 15, 2018	CME	A	2,497	—	—	34,873 Direct	+7.71%	Acquired	(price as of 2026-08-20)
Jan. 9, 2018	CME	S 10b5-1	7,500	$151.50	$1,136,250	32,376 Direct	-18.81%	Disposed	77.6% (price as of 2026-08-20)
Nov. 2, 2017	CME	M	5,175	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Nov. 2, 2017	CME	S	5,175	$139.70	$722,948	39,876 Direct	-11.49%	Disposed	92.6% (price as of 2026-08-20)
Nov. 2, 2017	CME	M	5,175	$83.88	$434,079	45,051 Direct	+12.98%	Acquired	220.8% (price as of 2026-08-20)
Oct. 11, 2017	CME	S 10b5-1	2,500	$136.83	$342,075	39,876 Direct	-5.90%	Disposed	96.7% (price as of 2026-08-20)
Sept. 16, 2017	CME	F	298	$131.29	$39,124	42,376 Direct	-0.70%	Disposed	105.0% (price as of 2026-08-20)
Sept. 15, 2017	CME	F	1,533	$131.29	$201,268	42,674 Direct	-3.47%	Disposed	105.0% (price as of 2026-08-20)
Sept. 15, 2017	CME	A	5,712	—	—	44,207 Direct	+14.84%	Acquired	(price as of 2026-08-20)
July 10, 2017	CME	S 10b5-1	2,500	$124.50	$311,250	38,495 Direct	-6.10%	Disposed	116.1% (price as of 2026-08-20)
April 10, 2017	CME	S 10b5-1	2,500	$117.85	$294,625	40,995 Direct	-5.75%	Disposed	128.3% (price as of 2026-08-20)
March 16, 2017	CME	F	140	$124.74	$17,464	43,495 Direct	-0.32%	Disposed	115.7% (price as of 2026-08-20)
March 15, 2017	CME	A	6,100	—	—	43,635 Direct	+16.25%	Acquired	(price as of 2026-08-20)
March 15, 2017	CME	F	2,134	$124.74	$266,195	37,535 Direct	-5.38%	Disposed	115.7% (price as of 2026-08-20)
Jan. 9, 2017	CME	S 10b5-1	7,500	$116.77	$875,775	39,669 Direct	-15.90%	Disposed	130.5% (price as of 2026-08-20)
Dec. 12, 2016	CME	M	4,625	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 12, 2016	CME	S	4,625	$123.30	$570,262	47,169 Direct	-8.93%	Disposed	118.2% (price as of 2026-08-20)
Dec. 12, 2016	CME	M	4,625	$110.54	$511,248	51,794 Direct	+9.81%	Acquired	143.4% (price as of 2026-08-20)
Sept. 16, 2016	CME	F	297	$109.65	$32,566	47,169 Direct	-0.63%	Disposed	145.4% (price as of 2026-08-20)
Sept. 15, 2016	CME	A	6,176	—	—	47,466 Direct	+14.96%	Acquired	(price as of 2026-08-20)
Sept. 15, 2016	CME	F	856	$109.28	$93,544	41,290 Direct	-2.03%	Disposed	146.2% (price as of 2026-08-20)
Sept. 14, 2016	CME	F	347	$107.55	$37,320	42,146 Direct	-0.82%	Disposed	150.2% (price as of 2026-08-20)
June 6, 2016	CME	M	3,900	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
June 6, 2016	CME	S	3,900	$96.72	$377,208	42,493 Direct	-8.41%	Disposed	178.2% (price as of 2026-08-20)
June 6, 2016	CME	M	3,900	$88.13	$343,707	46,393 Direct	+9.18%	Acquired	205.3% (price as of 2026-08-20)
March 16, 2016	CME	F	147	$96.38	$14,168	42,493 Direct	-0.34%	Disposed	179.2% (price as of 2026-08-20)
March 15, 2016	CME	A	7,428	—	—	42,640 Direct	+21.10%	Acquired	(price as of 2026-08-20)
March 15, 2016	CME	F	3,405	$96.71	$329,298	35,212 Direct	-8.82%	Disposed	178.3% (price as of 2026-08-20)
March 14, 2016	CME	F	862	$96.39	$83,088	38,617 Direct	-2.18%	Disposed	179.2% (price as of 2026-08-20)
March 1, 2016	CME	M	500	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
March 1, 2016	CME	S	500	$91.68	$45,840	39,479 Direct	-1.25%	Disposed	193.5% (price as of 2026-08-20)
March 1, 2016	CME	M	500	$86.09	$43,045	39,979 Direct	+1.27%	Acquired	212.6% (price as of 2026-08-20)
Sept. 16, 2015	CME	F	312	$95.37	$29,755	39,479 Direct	-0.78%	Disposed	182.2% (price as of 2026-08-20)
Sept. 15, 2015	CME	A	4,724	—	—	39,791 Direct	+13.47%	Acquired	(price as of 2026-08-20)

Showing latest 100 of 156 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
Dec. 1, 2020	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (2,500)	$54.37	Sept. 15, 2021	2,500	Disposed
Dec. 1, 2020	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (2,500)	$54.37	Sept. 15, 2021	2,500	Disposed
Jan. 2, 2019	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,740)	$62.83	March 15, 2020	1,740	Disposed
Jan. 2, 2019	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (4,160)	$56.87	Sept. 15, 2019	4,160	Disposed
Jan. 2, 2019	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (12,060)	$54.30	Sept. 15, 2020	12,060	Disposed
Nov. 2, 2017	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (5,175)	$83.88	June 16, 2018	5,175	Disposed
Dec. 12, 2016	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (4,625)	$110.54	June 15, 2017	4,625	Disposed
June 6, 2016	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (3,900)	$88.13	June 15, 2016	3,900	Disposed
March 1, 2016	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (500)	$86.09	March 15, 2016	500	Disposed
June 2, 2015	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,010)	$50.39	June 15, 2015	1,010	Disposed
May 15, 2015	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (497)	$50.39	June 15, 2015	497	Disposed
May 5, 2015	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A	$50.39	June 15, 2015	743	Disposed
May 5, 2015	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (743)	$50.39	June 15, 2015	743	Acquired
April 15, 2015	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (750)	$50.39	June 15, 2015	750	Disposed
April 2, 2015	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,000)	$50.39	June 15, 2015	1,000	Disposed
March 1, 2012	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,100)	$127.00	June 14, 2014	1,100	Disposed
March 1, 2012	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (800)	$72.61	Oct. 13, 2013	800	Disposed
Sept. 15, 2011	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,000)	$271.86	Sept. 15, 2021	1,000	Acquired
Sept. 15, 2010	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (2,412)	$271.49	Sept. 15, 2020	2,412	Acquired
March 15, 2010	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (348)	$314.15	March 15, 2020	348	Acquired

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

Initial ownership (Form 3) 21 holdings

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

Date	Ticker	Security	Shares	Ownership
March 18, 2026	MRX	Ordinary Shares	22,259	Direct
Dec. 19, 2014	CME	Class A Common Stock	35,368	Direct
Dec. 19, 2014	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (4,160)	4,160	Direct
Dec. 19, 2014	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (500)	500	Direct
Dec. 19, 2014	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (3,900)	3,900	Direct
Dec. 19, 2014	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (4,625)	4,625	Direct
Dec. 19, 2014	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (5,175)	5,175	Direct
Dec. 19, 2014	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (1,740)	1,740	Direct
Dec. 19, 2014	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (12,060)	12,060	Direct
Dec. 19, 2014	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (5,000)	5,000	Direct
Dec. 19, 2014	CME	Non-Qualfied Stock (right to buy)→ Common Stock Class A (4,000)	4,000	Direct
Feb. 23, 2011	CME	Common Stock Class A	—	Direct
Feb. 26, 2010	CME	Common Stock Class A	849	Direct
Feb. 26, 2010	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (800)	800	Direct
Feb. 26, 2010	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (1,100)	1,100	Direct
Feb. 26, 2010	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (800)	800	Direct
Feb. 26, 2010	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (832)	832	Direct
Feb. 26, 2010	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (1,035)	1,035	Direct
Feb. 26, 2010	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (100)	100	Direct
Feb. 26, 2010	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (780)	780	Direct
Feb. 26, 2010	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A (925)	925	Direct

Compensation (DEF 14A)

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

CME

CFO

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2020	$550,000	—	—	—	$585,750	$64,710	$101,784	$3,306,868
2019	$550,000	—	—	—	$672,272	$70,830	$187,624	$3,300,001
2018	$550,000	—	—	—	$960,433	$12,330	$92,722	$3,757,036

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