Hilda Harris Piell

Insider

First SEC filing: Aug. 16, 2007 · Latest: Aug. 16, 2007

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.

Insider at

CME selling May 18, 2026

Insider transactions

0 buys (P) 1 sells (S) Net: $-1,752,536 + 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
May 18, 2026	CME	S	5,753	$304.63	$1,752,536	27,702 Direct	-17.20%	Disposed	-11.7% (price as of 2026-08-20)
Sept. 16, 2025	CME	F	325	$259.83	$84,445	30,391 Direct	-1.06%	Disposed	3.6% (price as of 2026-08-20)
Sept. 15, 2025	CME	F	953	$258.83	$246,665	28,108 Direct	-3.28%	Disposed	4.0% (price as of 2026-08-20)
Sept. 15, 2025	CME	A	2,608	$258.83	$675,029	30,716 Direct	+9.28%	Acquired	4.0% (price as of 2026-08-20)
March 15, 2025	CME	F	1,436	$258.68	$371,464	29,061 Direct	-4.71%	Disposed	4.0% (price as of 2026-08-20)
March 15, 2025	CME	A	3,451	$258.68	$892,705	30,497 Direct	+12.76%	Acquired	4.0% (price as of 2026-08-20)
Feb. 27, 2025	CME	S	3,984	$250.46	$997,833	27,046 Direct	-12.84%	Disposed	7.4% (price as of 2026-08-20)
Sept. 16, 2024	CME	A	3,088	$218.53	$674,821	31,030 Direct	+11.05%	Acquired	23.1% (price as of 2026-08-20)
Sept. 15, 2024	CME	F	1,314	$216.99	$285,125	27,942 Direct	-4.49%	Disposed	24.0% (price as of 2026-08-20)
May 8, 2024	CME	S	3,310	$210.31	$696,126	29,256 Direct	-10.16%	Disposed	28.0% (price as of 2026-08-20)
May 8, 2024	CME	S	3,030	$210.38	$637,451	32,566 Direct	-8.51%	Disposed	27.9% (price as of 2026-08-20)
May 8, 2024	CME	S	500	$210.39	$105,195	35,596 Direct	-1.39%	Disposed	27.9% (price as of 2026-08-20)
May 8, 2024	CME	S	300	$210.40	$63,120	36,096 Direct	-0.82%	Disposed	27.9% (price as of 2026-08-20)
March 15, 2024	CME	F	2,603	$217.50	$566,152	36,396 Direct	-6.67%	Disposed	23.7% (price as of 2026-08-20)
March 15, 2024	CME	A	6,047	$217.50	$1,315,222	38,999 Direct	+18.35%	Acquired	23.7% (price as of 2026-08-20)
Sept. 16, 2023	CME	F	267	$206.82	$55,221	32,952 Direct	-0.80%	Disposed	30.1% (price as of 2026-08-20)
Sept. 15, 2023	CME	F	945	$206.82	$195,445	33,219 Direct	-2.77%	Disposed	30.1% (price as of 2026-08-20)
Sept. 15, 2023	CME	A	3,264	$206.82	$675,060	34,164 Direct	+10.56%	Acquired	30.1% (price as of 2026-08-20)
Aug. 7, 2023	CME	S	4,477	$207.98	$931,126	30,900 Direct	-12.66%	Disposed	29.4% (price as of 2026-08-20)
Sept. 16, 2022	CME	F	282	$191.56	$54,020	35,377 Direct	-0.79%	Disposed	40.5% (price as of 2026-08-20)
Sept. 15, 2022	CME	A	3,540	—	—	35,659 Direct	+11.02%	Acquired	(price as of 2026-08-20)
Sept. 15, 2022	CME	F	697	$190.77	$132,967	32,119 Direct	-2.12%	Disposed	41.1% (price as of 2026-08-20)
Sept. 14, 2022	CME	F	324	$191.30	$61,981	32,816 Direct	-0.98%	Disposed	40.7% (price as of 2026-08-20)
Sept. 14, 2022	CME	F	324	—	—	32,816 Direct	-0.98%	Disposed	(price as of 2026-08-20)
Aug. 15, 2022	CME	S	4,901	$203.88	$999,216	33,140 Direct	-12.88%	Disposed	32.0% (price as of 2026-08-20)
March 15, 2022	CME	F	792	$232.00	$183,744	38,041 Direct	-2.04%	Disposed	16.0% (price as of 2026-08-20)
March 15, 2022	CME	A	2,393	$232.00	$555,176	38,833 Direct	+6.57%	Acquired	16.0% (price as of 2026-08-20)
March 3, 2022	CME	S	2,000	$244.00	$488,000	36,440 Direct	-5.20%	Disposed	10.3% (price as of 2026-08-20)
Feb. 24, 2022	CME	S	1,500	$234.01	$351,015	38,440 Direct	-3.76%	Disposed	15.0% (price as of 2026-08-20)
Oct. 19, 2021	CME	S 10b5-1	2,947	$215.00	$633,605	39,940 Direct	-6.87%	Disposed	25.2% (price as of 2026-08-20)
Sept. 16, 2021	CME	F	296	$188.69	$55,852	42,887 Direct	-0.69%	Disposed	42.6% (price as of 2026-08-20)
Sept. 15, 2021	CME	A	3,176	—	—	43,183 Direct	+7.94%	Acquired	(price as of 2026-08-20)
Sept. 15, 2021	CME	F	380	$188.96	$71,805	40,007 Direct	-0.94%	Disposed	42.4% (price as of 2026-08-20)
Sept. 15, 2021	CME	F	403	$188.96	$76,151	40,387 Direct	-0.99%	Disposed	42.4% (price as of 2026-08-20)
Sept. 14, 2021	CME	F	342	$188.85	$64,587	40,790 Direct	-0.83%	Disposed	42.5% (price as of 2026-08-20)
March 15, 2021	CME	F	2,620	$209.09	$547,816	41,132 Direct	-5.99%	Disposed	28.7% (price as of 2026-08-20)
March 15, 2021	CME	A	7,048	$209.09	$1,473,666	43,752 Direct	+19.20%	Acquired	28.7% (price as of 2026-08-20)
March 5, 2021	CME	S 10b5-1	1,500	$213.00	$319,500	36,704 Direct	-3.93%	Disposed	26.3% (price as of 2026-08-20)
Jan. 7, 2021	CME	S 10b5-1	1,500	$198.00	$297,000	38,204 Direct	-3.78%	Disposed	35.9% (price as of 2026-08-20)
Dec. 21, 2020	CME	S 10b5-1	2,300	$182.00	$418,600	39,704 Direct	-5.48%	Disposed	47.9% (price as of 2026-08-20)
Sept. 16, 2020	CME	F	308	$170.20	$52,422	42,004 Direct	-0.73%	Disposed	58.1% (price as of 2026-08-20)
Sept. 15, 2020	CME	A	3,568	—	—	42,312 Direct	+9.21%	Acquired	(price as of 2026-08-20)
Sept. 15, 2020	CME	F	415	$168.10	$69,762	38,744 Direct	-1.06%	Disposed	60.1% (price as of 2026-08-20)
Sept. 15, 2020	CME	F	443	$168.10	$74,468	39,159 Direct	-1.12%	Disposed	60.1% (price as of 2026-08-20)
Sept. 14, 2020	CME	F	354	$166.08	$58,792	39,602 Direct	-0.89%	Disposed	62.0% (price as of 2026-08-20)
March 15, 2020	CME	F	2,129	$182.01	$387,499	39,956 Direct	-5.06%	Disposed	47.8% (price as of 2026-08-20)
March 15, 2020	CME	A	4,804	—	—	42,085 Direct	+12.89%	Acquired	(price as of 2026-08-20)
March 15, 2020	CME	F	1,587	$182.01	$288,850	37,281 Direct	-4.08%	Disposed	47.8% (price as of 2026-08-20)
March 15, 2020	CME	A	4,804	—	—	38,868 Direct	+14.10%	Acquired	(price as of 2026-08-20)
Sept. 16, 2019	CME	A	2,900	—	—	34,064 Direct	+9.31%	Acquired	(price as of 2026-08-20)
Sept. 15, 2019	CME	F	443	$205.80	$91,169	31,164 Direct	-1.40%	Disposed	30.8% (price as of 2026-08-20)
Sept. 15, 2019	CME	F	478	$205.80	$98,372	31,607 Direct	-1.49%	Disposed	30.8% (price as of 2026-08-20)
Sept. 15, 2019	CME	F	353	$205.80	$72,647	32,085 Direct	-1.09%	Disposed	30.8% (price as of 2026-08-20)
Sept. 14, 2019	CME	F	373	$205.80	$76,763	32,438 Direct	-1.14%	Disposed	30.8% (price as of 2026-08-20)
May 24, 2019	CME	S 10b5-1	200	$188.00	$37,600	32,811 Direct	-0.61%	Disposed	43.1% (price as of 2026-08-20)
May 24, 2019	CME	S 10b5-1	932	$188.06	$175,272	33,011 Direct	-2.75%	Disposed	43.1% (price as of 2026-08-20)
May 22, 2019	CME	S 10b5-1	1,420	$186.23	$264,447	33,943 Direct	-4.02%	Disposed	44.5% (price as of 2026-08-20)
March 15, 2019	CME	F	1,077	$170.14	$183,241	35,363 Direct	-2.96%	Disposed	58.2% (price as of 2026-08-20)
March 15, 2019	CME	A	3,674	—	—	36,440 Direct	+11.21%	Acquired	(price as of 2026-08-20)
March 15, 2019	CME	F	1,606	$170.14	$273,245	32,766 Direct	-4.67%	Disposed	58.2% (price as of 2026-08-20)
March 15, 2019	CME	A	3,674	—	—	34,372 Direct	+11.97%	Acquired	(price as of 2026-08-20)
Sept. 15, 2018	CME	F	411	$173.15	$71,165	30,698 Direct	-1.32%	Disposed	55.4% (price as of 2026-08-20)
Sept. 15, 2018	CME	F	453	$173.15	$78,437	31,109 Direct	-1.44%	Disposed	55.4% (price as of 2026-08-20)
Sept. 15, 2018	CME	F	486	$173.15	$84,151	31,562 Direct	-1.52%	Disposed	55.4% (price as of 2026-08-20)
Sept. 15, 2018	CME	F	357	$173.15	$61,815	32,048 Direct	-1.10%	Disposed	55.4% (price as of 2026-08-20)
Sept. 14, 2018	CME	A	3,464	—	—	32,405 Direct	+11.97%	Acquired	(price as of 2026-08-20)
Sept. 4, 2018	CME	S 10b5-1	1,823	$175.00	$319,025	30,176 Direct	-5.70%	Disposed	53.8% (price as of 2026-08-20)
June 14, 2018	CME	G	1,235	—	—	30,764 Direct	-3.86%	Disposed	(price as of 2026-08-20)
March 15, 2018	CME	F	2,888	$165.66	$478,426	31,999 Direct	-8.28%	Disposed	62.4% (price as of 2026-08-20)
March 15, 2018	CME	A	8,037	—	—	34,887 Direct	+29.93%	Acquired	(price as of 2026-08-20)
Feb. 20, 2018	CME	S 10b5-1	3,299	$163.52	$539,452	26,850 Direct	-10.94%	Disposed	64.6% (price as of 2026-08-20)
Oct. 5, 2017	CME	S 10b5-1	1,350	$138.00	$186,300	30,149 Direct	-4.29%	Disposed	95.0% (price as of 2026-08-20)
Sept. 16, 2017	CME	F	255	$131.29	$33,479	31,499 Direct	-0.80%	Disposed	105.0% (price as of 2026-08-20)
Sept. 15, 2017	CME	F	1,374	$131.29	$180,392	31,754 Direct	-4.15%	Disposed	105.0% (price as of 2026-08-20)
Sept. 15, 2017	CME	A	4,284	—	—	33,128 Direct	+14.85%	Acquired	(price as of 2026-08-20)
Sept. 6, 2017	CME	S 10b5-1	714	$129.00	$92,106	28,844 Direct	-2.42%	Disposed	108.6% (price as of 2026-08-20)
March 15, 2017	CME	A	5,228	—	—	29,558 Direct	+21.49%	Acquired	(price as of 2026-08-20)
March 15, 2017	CME	F	1,752	$124.74	$218,544	24,330 Direct	-6.72%	Disposed	115.7% (price as of 2026-08-20)
March 14, 2017	CME	S 10b5-1	3,043	$124.26	$378,123	26,082 Direct	-10.45%	Disposed	116.6% (price as of 2026-08-20)
Dec. 7, 2016	CME	M	375	$106.58	$39,968	29,500 Direct	+1.29%	Acquired	152.5% (price as of 2026-08-20)
Dec. 7, 2016	CME	S 10b5-1	375	$120.00	$45,000	29,125 Direct	-1.27%	Disposed	124.3% (price as of 2026-08-20)
Dec. 7, 2016	CME	M	3,275	$110.54	$362,018	32,400 Direct	+11.24%	Acquired	143.4% (price as of 2026-08-20)
Dec. 7, 2016	CME	S 10b5-1	3,275	$120.00	$393,000	29,125 Direct	-10.11%	Disposed	124.3% (price as of 2026-08-20)
Dec. 7, 2016	CME	M	2,200	$109.72	$241,384	31,325 Direct	+7.55%	Acquired	145.3% (price as of 2026-08-20)
Dec. 7, 2016	CME	S 10b5-1	2,200	$120.00	$264,000	29,125 Direct	-7.02%	Disposed	124.3% (price as of 2026-08-20)
Dec. 7, 2016	CME	M	375	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 7, 2016	CME	M	2,200	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Dec. 7, 2016	CME	M	3,275	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Sept. 19, 2016	CME	S 10b5-1	893	$110.00	$98,230	29,125 Direct	-2.97%	Disposed	144.6% (price as of 2026-08-20)
Sept. 16, 2016	CME	F	255	$109.65	$27,961	30,018 Direct	-0.84%	Disposed	145.4% (price as of 2026-08-20)
Sept. 15, 2016	CME	A	4,804	—	—	30,273 Direct	+18.86%	Acquired	(price as of 2026-08-20)
Sept. 15, 2016	CME	F	848	$109.28	$92,669	25,469 Direct	-3.22%	Disposed	146.2% (price as of 2026-08-20)
Sept. 14, 2016	CME	F	297	$107.55	$31,942	26,317 Direct	-1.12%	Disposed	150.2% (price as of 2026-08-20)
March 15, 2016	CME	A	6,368	—	—	26,614 Direct	+31.45%	Acquired	(price as of 2026-08-20)
March 15, 2016	CME	F	2,372	$96.71	$229,396	20,246 Direct	-10.49%	Disposed	178.3% (price as of 2026-08-20)
March 4, 2016	CME	S 10b5-1	252	$95.00	$23,940	22,618 Direct	-1.10%	Disposed	183.3% (price as of 2026-08-20)
Feb. 22, 2016	CME	M	1,145	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-20)
Feb. 22, 2016	CME	S 10b5-1	1,145	$94.00	$107,630	22,870 Direct	-4.77%	Disposed	186.3% (price as of 2026-08-20)
Feb. 22, 2016	CME	M	1,145	$54.37	$62,254	24,015 Direct	+5.01%	Acquired	394.9% (price as of 2026-08-20)
Sept. 16, 2015	CME	F	164	$95.37	$15,641	22,870 Direct	-0.71%	Disposed	182.2% (price as of 2026-08-20)

Showing latest 100 of 186 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. 7, 2016	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (375)	$106.58	March 15, 2017	375	Disposed
Dec. 7, 2016	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (2,200)	$109.72	Sept. 14, 2017	2,200	Disposed
Dec. 7, 2016	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (3,275)	$110.54	June 15, 2017	3,275	Disposed
Feb. 22, 2016	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,145)	$54.37	Sept. 15, 2021	1,145	Disposed
Feb. 6, 2015	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,600)	$88.13	June 15, 2016	1,600	Disposed
Dec. 8, 2014	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (5,825)	$83.88	June 16, 2018	5,825	Disposed
Sept. 15, 2014	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,145)	$54.37	Sept. 15, 2021	1,145	Disposed
Sept. 15, 2014	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (2,085)	$54.30	Sept. 15, 2020	2,085	Disposed
May 22, 2014	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (2,085)	$54.30	Sept. 15, 2020	2,085	Disposed
May 22, 2014	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,145)	$54.37	Sept. 15, 2021	1,145	Disposed
May 22, 2014	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,500)	$56.87	Sept. 15, 2019	1,500	Disposed
Nov. 18, 2013	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (4,500)	$56.87	Sept. 15, 2019	4,500	Disposed
June 17, 2013	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,145)	$54.37	Sept. 15, 2021	1,145	Disposed
June 17, 2013	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (4,170)	$54.30	Sept. 15, 2020	4,170	Disposed
May 30, 2013	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (2,100)	$50.39	June 15, 2015	2,100	Disposed
May 20, 2013	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (2,600)	$25.40	June 14, 2014	2,600	Disposed
Dec. 12, 2012	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (5,900)	$12.60	June 6, 2013	5,900	Disposed
Sept. 15, 2011	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (916)	$271.86	Sept. 15, 2021	916	Acquired
Feb. 14, 2011	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (300)	$22.00	July 20, 2011	300	Disposed
Sept. 15, 2010	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,668)	$271.49	Sept. 15, 2020	1,668	Acquired
April 20, 2010	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (200)	$63.01	June 6, 2013	200	Disposed
Sept. 15, 2009	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,200)	$284.34	Sept. 15, 2019	1,200	Acquired
June 16, 2008	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (1,165)	$419.41	June 16, 2018	1,165	Acquired
Nov. 20, 2007	CME	Incentive Stock Option (right to buy)	Common Stock Class A (195)	$127.00	June 14, 2014	195	Disposed
Sept. 14, 2007	CME	Non-Qualified Stock Option (right to buy)	Common Stock Class A (440)	$548.60	Sept. 14, 2017	440	Acquired

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

Initial ownership (Form 3) 7 holdings

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

Date	Ticker	Security	Shares	Ownership
Aug. 16, 2007	CME	Incentive Stock Option (right to buy)→ Common Stock Class A	—	Direct
Aug. 16, 2007	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A	—	Direct
Aug. 16, 2007	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A	—	Direct
Aug. 16, 2007	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A	—	Direct
Aug. 16, 2007	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A	—	Direct
Aug. 16, 2007	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A	—	Direct
Aug. 16, 2007	CME	Non-Qualified Stock Option (right to buy)→ Common Stock Class A	—	Direct