Insider · CIK 0001391400

Earl H Nemser

Period1M 3M 6M 1Y 2Y All datashares as filed — not split-adjusted

Open-market buys & salesbuys $0 · 0sales $9.0M · 80net −$9.0M

Reported trades — common stock

Trade	Reported (ET)	Company	Shares	Avg price	Total	Owned after	Δ stake	Flags
Jul 31, 2026 AForm 4 →	Aug 4, 4:27 pm EDT	Interactive Brokers Group, Inc.IBKR	803,568	$87.99	$70,705,948	803,568	—
Dec 31, 2018 AForm 4 →	Jan 3, 2019, 4:10 pm EST	Interactive Brokers Group, Inc.IBKR	7,434	—	—	75,811	—	plan?
May 9, 2018 FForm 4 →	May 22, 4:10 pm EDT	Interactive Brokers Group, Inc.IBKR	233	$79.24	$18,463	68,377	—	plan? late
Jan 22, 2018 SForm 4 →	Jan 24, 7:57 pm EST	Interactive Brokers Group, Inc.IBKR	32,000	$62.80	$2,009,600	68,610	−31.8%	plan?
Dec 31, 2017 AForm 4/A →	Apr 6, 2018, 4:18 pm EDT	Interactive Brokers Group, Inc.IBKR	5,025	—	—	100,610	—	plan?
Dec 31, 2017 AForm 4 →	Jan 3, 2018, 7:14 pm EST	Interactive Brokers Group, Inc.IBKR	5,025	—	—	100,610	—	plan? amended
Oct 26, 2017 SForm 4 →	Oct 30, 7:12 pm EDT	Interactive Brokers Group, Inc.IBKR	20	$52.41	$1,048	0	−100%	plan?
Oct 25, 2017 SForm 4 →	Oct 27, 1:28 pm EDT	Interactive Brokers Group, Inc.IBKR	1,290	$51.34	$66,234	20	−98.5%	plan?
Oct 23, 2017 SForm 4 →	Oct 25, 7:27 pm EDT	Interactive Brokers Group, Inc.IBKR	2,683	$50.84	$136,402	95,585	−2.73%	plan?
Oct 19, 2017 SForm 4 →	Oct 23, 7:39 pm EDT	Interactive Brokers Group, Inc.IBKR	1,683	$49.37	$83,088	2,993	−36.0%	plan?
Oct 17, 2017 SForm 4 →	Oct 19, 7:36 pm EDT	Interactive Brokers Group, Inc.IBKR	1,683	$48.65	$81,873	4,676	−26.5%	plan?
Oct 13, 2017 SForm 4 →	Oct 17, 5:52 pm EDT	Interactive Brokers Group, Inc.IBKR	1,675	$47.56	$79,662	6,359	−20.8%	plan?
Oct 11, 2017 SForm 4 →	Oct 13, 2:19 pm EDT	Interactive Brokers Group, Inc.IBKR	1,608	$47.78	$76,838	8,034	−16.7%	plan?
Oct 9, 2017 SForm 4 →	Oct 11, 1:11 pm EDT	Interactive Brokers Group, Inc.IBKR	1,658	$47.42	$78,625	9,642	−14.7%	plan?
Oct 5, 2017 SForm 4 →	Oct 10, 9:34 am EDT	Interactive Brokers Group, Inc.IBKR	1,649	$47.52	$78,368	11,300	−12.7%	plan? late
Oct 3, 2017 SForm 4 →	Oct 5, 11:15 am EDT	Interactive Brokers Group, Inc.IBKR	1,623	$47.12	$76,480	12,949	−11.1%	plan?
Sep 29, 2017 SForm 4 →	Oct 3, 3:23 pm EDT	Interactive Brokers Group, Inc.IBKR	1,683	$45.26	$76,169	14,572	−10.4%	plan?
Sep 27, 2017 SForm 4 →	Sep 29, 3:02 pm EDT	Interactive Brokers Group, Inc.IBKR	1,632	$44.52	$72,661	16,255	−9.12%	plan?
Sep 25, 2017 SForm 4 →	Sep 27, 3:47 pm EDT	Interactive Brokers Group, Inc.IBKR	1,590	$43.91	$69,811	17,887	−8.16%	plan?
Sep 21, 2017 SForm 4 →	Sep 25, 4:13 pm EDT	Interactive Brokers Group, Inc.IBKR	1,623	$43.59	$70,745	19,477	−7.69%	plan?
Sep 19, 2017 SForm 4 →	Sep 21, 1:22 pm EDT	Interactive Brokers Group, Inc.IBKR	1,624	$43.42	$70,522	21,100	−7.15%	plan?
Sep 15, 2017 SForm 4 →	Sep 19, 3:07 pm EDT	Interactive Brokers Group, Inc.IBKR	1,683	$42.29	$71,182	22,724	−6.90%	plan?
Sep 13, 2017 SForm 4 →	Sep 15, 12:10 pm EDT	Interactive Brokers Group, Inc.IBKR	1,666	$41.94	$69,870	24,407	−6.39%	plan?
Sep 11, 2017 SForm 4 →	Sep 13, 4:01 pm EDT	Interactive Brokers Group, Inc.IBKR	1,683	$41.90	$70,518	26,073	−6.06%	plan?
Sep 11, 2017 SForm 4 →	Sep 13, 4:00 pm EDT	Interactive Brokers Group, Inc.IBKR	1,683	$41.90	$70,518	26,073	−6.06%	plan?
Sep 7, 2017 SForm 4 →	Sep 11, 2:39 pm EDT	Interactive Brokers Group, Inc.IBKR	1,623	$41.40	$67,193	27,756	−5.52%	plan?
Sep 5, 2017 SForm 4 →	Sep 7, 2:48 pm EDT	Interactive Brokers Group, Inc.IBKR	1,675	$41.86	$70,123	29,379	−5.39%	plan?
Aug 31, 2017 SForm 4 →	Sep 5, 2:11 pm EDT	Interactive Brokers Group, Inc.IBKR	1,666	$41.84	$69,700	31,054	−5.09%	plan?
Aug 29, 2017 SForm 4 →	Aug 31, 8:31 pm EDT	Interactive Brokers Group, Inc.IBKR	1,623	$41.64	$67,589	32,720	−4.73%	plan?
Aug 25, 2017 SForm 4 →	Aug 29, 11:31 am EDT	Interactive Brokers Group, Inc.IBKR	1,649	$42.25	$69,673	34,343	−4.58%	plan?
Aug 23, 2017 SForm 4 →	Aug 25, 2:17 pm EDT	Interactive Brokers Group, Inc.IBKR	1,624	$41.70	$67,725	35,992	−4.32%	plan?
Aug 21, 2017 SForm 4 →	Aug 23, 12:20 pm EDT	Interactive Brokers Group, Inc.IBKR	1,649	$40.94	$67,510	37,616	−4.20%	plan?
Aug 17, 2017 SForm 4 →	Aug 21, 11:56 am EDT	Interactive Brokers Group, Inc.IBKR	1,649	$40.77	$67,229	39,265	−4.03%	plan?
Aug 15, 2017 SForm 4 →	Aug 17, 2:07 pm EDT	Interactive Brokers Group, Inc.IBKR	1,683	$41.36	$69,617	40,914	−3.95%	plan?
Aug 14, 2017 SForm 4 →	Aug 15, 1:48 pm EDT	Interactive Brokers Group, Inc.IBKR	841	$41.29	$34,725	42,597	−1.94%	plan?
Aug 10, 2017 SForm 4 →	Aug 14, 4:52 pm EDT	Interactive Brokers Group, Inc.IBKR	1,624	$40.60	$65,933	43,438	−3.60%	plan?
Aug 8, 2017 SForm 4 →	Aug 10, 3:11 pm EDT	Interactive Brokers Group, Inc.IBKR	1,674	$40.31	$67,487	45,062	−3.58%	plan?
Aug 4, 2017 SForm 4 →	Aug 8, 7:19 pm EDT	Interactive Brokers Group, Inc.IBKR	1,607	$40.52	$65,119	46,736	−3.32%	plan?
Aug 2, 2017 SForm 4 →	Aug 4, 3:28 pm EDT	Interactive Brokers Group, Inc.IBKR	1,657	$40.42	$66,979	48,343	−3.31%	plan?
May 9, 2017 FForm 4 →	May 25, 4:22 pm EDT	Interactive Brokers Group, Inc.IBKR	4,458	$35.80	$159,596	96,585	—	plan? late
Dec 31, 2016 AForm 4 →	Jan 4, 2017, 5:25 pm EST	Interactive Brokers Group, Inc.IBKR	7,504	—	—	101,043	—	plan?
Jul 28, 2016 AForm 4 →	Aug 1, 5:00 pm EDT	Interactive Brokers Group, Inc.IBKR	50,000	$35.14	$1,757,000	50,000	—	plan?
May 9, 2016 FForm 4 →	May 24, 1:33 pm EDT	Interactive Brokers Group, Inc.IBKR	5,264	$36.82	$193,820	93,539	—	plan? late
Apr 22, 2016 SForm 4 →	Apr 26, 5:22 pm EDT	Interactive Brokers Group, Inc.IBKR	4,000	$40.21	$160,840	98,803	−3.89%	plan?
Dec 31, 2015 AForm 4 →	Jan 5, 2016, 10:32 am EST	Interactive Brokers Group, Inc.IBKR	6,632	—	—	102,803	—	plan?
Nov 12, 2015 SForm 4 →	Nov 16, 8:20 pm EST	Interactive Brokers Group, Inc.IBKR	1,117	$42.16	$47,093	0	−100%	plan?
Nov 10, 2015 SForm 4 →	Nov 12, 12:46 pm EST	Interactive Brokers Group, Inc.IBKR	2,601	$42.95	$111,715	2,420	−51.8%	plan?
Nov 6, 2015 SForm 4 →	Nov 10, 12:32 pm EST	Interactive Brokers Group, Inc.IBKR	2,533	$43.61	$110,452	5,021	−33.5%	plan?
Nov 4, 2015 SForm 4 →	Nov 6, 12:28 pm EST	Interactive Brokers Group, Inc.IBKR	2,565	$41.83	$107,295	7,554	−25.3%	plan?
Nov 2, 2015 SForm 4 →	Nov 4, 12:52 pm EST	Interactive Brokers Group, Inc.IBKR	2,605	$42.34	$110,303	10,119	−20.5%	plan?
Oct 29, 2015 SForm 4 →	Nov 2, 2:53 pm EST	Interactive Brokers Group, Inc.IBKR	2,586	$41.41	$107,087	12,724	−16.9%	plan?
Oct 27, 2015 SForm 4 →	Oct 29, 3:16 pm EDT	Interactive Brokers Group, Inc.IBKR	2,558	$40.03	$102,404	15,310	−14.3%	plan?
Oct 23, 2015 SForm 4 →	Oct 27, 12:44 pm EDT	Interactive Brokers Group, Inc.IBKR	2,573	$39.31	$101,154	17,868	−12.6%	plan?
Oct 21, 2015 SForm 4 →	Oct 23, 12:48 pm EDT	Interactive Brokers Group, Inc.IBKR	2,514	$38.62	$97,101	20,441	−11.0%	plan?
Oct 19, 2015 SForm 4 →	Oct 21, 1:51 pm EDT	Interactive Brokers Group, Inc.IBKR	2,508	$40.00	$100,317	22,955	−9.85%	plan?
Oct 15, 2015 SForm 4 →	Oct 19, 12:16 pm EDT	Interactive Brokers Group, Inc.IBKR	2,604	$38.38	$99,954	25,463	−9.28%	plan?
Oct 13, 2015 SForm 4 →	Oct 15, 1:55 pm EDT	Interactive Brokers Group, Inc.IBKR	2,576	$37.81	$97,409	28,067	−8.41%	plan?
Oct 12, 2015 SForm 4/A →	Nov 16, 8:05 pm EST	Interactive Brokers Group, Inc.IBKR	1,303	$38.73	$50,465	29,340	−4.25%	plan?
Oct 8, 2015 SForm 4 →	Oct 13, 11:51 am EDT	Interactive Brokers Group, Inc.IBKR	2,594	$39.37	$102,135	30,643	−7.80%	plan? late
Oct 6, 2015 SForm 4 →	Oct 8, 11:42 am EDT	Interactive Brokers Group, Inc.IBKR	2,605	$39.28	$102,333	33,237	−7.27%	plan?
Oct 2, 2015 SForm 4 →	Oct 6, 11:59 am EDT	Interactive Brokers Group, Inc.IBKR	2,605	$39.21	$102,138	35,842	−6.78%	plan?
Sep 30, 2015 SForm 4 →	Oct 2, 12:54 pm EDT	Interactive Brokers Group, Inc.IBKR	2,605	$39.35	$102,512	38,447	−6.35%	plan?
Sep 28, 2015 SForm 4 →	Sep 30, 4:25 pm EDT	Interactive Brokers Group, Inc.IBKR	2,500	$38.45	$96,125	41,052	−5.74%	plan?
Sep 24, 2015 SForm 4 →	Sep 28, 3:27 pm EDT	Interactive Brokers Group, Inc.IBKR	2,540	$39.79	$101,078	43,552	−5.51%	plan?
Sep 22, 2015 SForm 4 →	Sep 24, 10:48 am EDT	Interactive Brokers Group, Inc.IBKR	2,605	$39.09	$101,817	46,092	−5.35%	plan?
Sep 18, 2015 SForm 4 →	Sep 22, 4:04 pm EDT	Interactive Brokers Group, Inc.IBKR	2,594	$39.02	$101,208	48,697	−5.06%	plan?
Sep 16, 2015 SForm 4 →	Sep 18, 12:39 pm EDT	Interactive Brokers Group, Inc.IBKR	2,605	$39.36	$102,520	51,291	−4.83%	plan?
Sep 16, 2015 SForm 4 →	Sep 18, 12:31 pm EDT	Interactive Brokers Group, Inc.IBKR	2,605	$39.36	$102,520	51,291	−4.83%	plan?
Sep 14, 2015 SForm 4 →	Sep 16, 3:31 pm EDT	Interactive Brokers Group, Inc.IBKR	2,576	$38.27	$98,590	53,896	−4.56%	plan?
Sep 10, 2015 SForm 4 →	Sep 14, 12:33 pm EDT	Interactive Brokers Group, Inc.IBKR	2,561	$38.12	$97,617	56,472	−4.34%	plan?
Sep 8, 2015 SForm 4 →	Sep 10, 3:07 pm EDT	Interactive Brokers Group, Inc.IBKR	2,565	$38.35	$98,367	59,033	−4.16%	plan?
Sep 3, 2015 SForm 4 →	Sep 8, 3:13 pm EDT	Interactive Brokers Group, Inc.IBKR	2,595	$37.57	$97,499	61,598	−4.04%	plan?
Sep 1, 2015 SForm 4 →	Sep 3, 3:07 pm EDT	Interactive Brokers Group, Inc.IBKR	2,591	$38.04	$98,557	64,193	−3.88%	plan?
Aug 28, 2015 SForm 4 →	Sep 1, 12:26 pm EDT	Interactive Brokers Group, Inc.IBKR	2,514	$39.77	$99,977	66,784	−3.63%	plan?
Aug 26, 2015 SForm 4 →	Aug 28, 12:01 pm EDT	Interactive Brokers Group, Inc.IBKR	2,551	$38.25	$97,587	69,298	−3.55%	plan?
Aug 24, 2015 SForm 4 →	Aug 26, 3:56 pm EDT	Interactive Brokers Group, Inc.IBKR	2,518	$37.36	$94,060	71,849	−3.39%	plan?
Aug 20, 2015 SForm 4 →	Aug 24, 3:24 pm EDT	Interactive Brokers Group, Inc.IBKR	2,605	$39.94	$104,049	74,367	−3.38%	plan?
Aug 18, 2015 SForm 4 →	Aug 20, 1:46 pm EDT	Interactive Brokers Group, Inc.IBKR	2,594	$42.17	$109,379	76,972	−3.26%	plan?
Aug 14, 2015 SForm 4 →	Aug 18, 1:59 pm EDT	Interactive Brokers Group, Inc.IBKR	2,561	$41.98	$107,507	79,566	−3.12%	plan?
Aug 12, 2015 SForm 4 →	Aug 14, 3:55 pm EDT	Interactive Brokers Group, Inc.IBKR	2,605	$41.44	$107,951	82,127	−3.07%	plan?
Aug 10, 2015 SForm 4 →	Aug 12, 2:18 pm EDT	Interactive Brokers Group, Inc.IBKR	2,583	$42.63	$110,123	84,732	−2.96%	plan?
Aug 6, 2015 SForm 4 →	Aug 10, 3:34 pm EDT	Interactive Brokers Group, Inc.IBKR	2,605	$42.71	$111,252	87,315	−2.90%	plan?
Aug 4, 2015 SForm 4 →	Aug 6, 7:42 pm EDT	Interactive Brokers Group, Inc.IBKR	2,533	$43.82	$111,000	89,920	−2.74%	plan?
Jul 31, 2015 SForm 4 →	Aug 4, 4:26 pm EDT	Interactive Brokers Group, Inc.IBKR	2,601	$40.82	$106,166	92,453	−2.74%	plan?
Jul 29, 2015 SForm 4 →	Jul 31, 10:21 am EDT	Interactive Brokers Group, Inc.IBKR	2,439	$41.08	$100,196	95,054	−2.50%	plan?
Jul 27, 2015 SForm 4 →	Jul 29, 5:05 pm EDT	Interactive Brokers Group, Inc.IBKR	2,507	$41.43	$103,853	97,493	−2.51%	plan?
Jul 24, 2015 AForm 4 →	Jul 28, 5:20 pm EDT	Interactive Brokers Group, Inc.IBKR	100,000	$42.18	$4,218,000	100,000	—	plan?
May 8, 2015 FForm 4 →	May 21, 2:27 pm EDT	Interactive Brokers Group, Inc.IBKR	5,206	$34.60	$180,128	96,171	—	plan? late
Jan 9, 2015 SForm 4 →	Jan 12, 10:46 am EST	Interactive Brokers Group, Inc.IBKR	455	$29.24	$13,304	0	−100%	plan?
Jan 7, 2015 SForm 4 →	Jan 9, 11:00 am EST	Interactive Brokers Group, Inc.IBKR	4,306	$29.00	$124,887	455	−90.4%	plan?
Jan 5, 2015 SForm 4 →	Jan 7, 11:02 am EST	Interactive Brokers Group, Inc.IBKR	4,306	$28.78	$123,940	4,761	−47.5%	plan?
Dec 31, 2014 AForm 4 →	Jan 5, 2015, 7:16 pm EST	Interactive Brokers Group, Inc.IBKR	9,541	—	—	101,377	—	plan?
Dec 31, 2014 SForm 4 →	Jan 5, 2015, 4:06 pm EST	Interactive Brokers Group, Inc.IBKR	4,277	$29.09	$124,427	9,067	−32.1%	plan?

Reported trades — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.