Arbo · 13F Signal Engine

Insider

Form 4/4-A open-market insider transactions (officers, directors, 10% owners) · 142 transactions

Table I (non-derivative) transactions only -- common stock bought, sold, awarded, exercised, or tax-withheld. Covers this app's full ticker Universe (backfilled INSIDER_LOOKBACK_QUARTERS quarters back, continuously monitored) plus whatever the market-wide discovery has found beyond it. Informational only: never summed into the core flow ranking.

Ticker	Insider	Role	Type	Date	Shares	Price	Value	Notes	Filing
RBA	Stein Deborah	Director	Purchase	2026-09-09	300	$81.14	$24,342	Acquired (2,125 owned after)	EDGAR
RBA	Stein Deborah	Director	Purchase	2026-09-09	200	$80.56	$16,112	Acquired (2,325 owned after)	EDGAR
RBA	Harford Chloe	Director	Purchase	2026-08-24	1,200	$83.74	$100,488	Acquired (1,200 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Sale 10b5-1	2026-06-25	150	$115.00	$17,250	Disposed (3,514 owned after)	EDGAR
RBA	Stein Deborah	Director	Purchase	2026-05-19	425	$103.15	$43,839	Acquired (1,825 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Sale 10b5-1	2026-05-05	140	$110.00	$15,400	Disposed (3,664 owned after)	EDGAR
RBA	Sieger Michael D	Director	Option exercise	2026-04-30	22	—	—	Acquired (7,619 owned after)	EDGAR
RBA	Morrison Gregory B	Director	Option exercise	2026-04-30	1,896	—	—	Acquired (4,561 owned after)	EDGAR
RBA	Morrison Gregory B	Director	Option exercise	2026-04-30	22	—	—	Acquired (4,583 owned after)	EDGAR
RBA	DeWitt Adam	Director	Option exercise	2026-04-30	1,896	—	—	Acquired (7,761 owned after)	EDGAR
RBA	Sieger Michael D	Director	Option exercise	2026-04-30	1,896	—	—	Acquired (7,597 owned after)	EDGAR
RBA	DeWitt Adam	Director	Option exercise	2026-04-30	22	—	—	Acquired (7,783 owned after)	EDGAR
RBA	Stein Deborah	Director	Purchase	2026-03-18	400	$98.74	$39,496	Acquired (1,400 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Option exercise	2026-03-14	63	—	—	Acquired (3,644 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Tax withholding	2026-03-14	1,855	$98.68	$183,051	Disposed (1,789 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Option exercise	2026-03-14	1,434	—	—	Acquired (3,223 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Option exercise	2026-03-14	16	—	—	Acquired (3,239 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Tax withholding	2026-03-14	738	$97.91	$72,258	Disposed (2,501 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2026-03-14	404	—	—	Acquired (25,278 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2026-03-14	10,976	—	—	Acquired (36,254 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Tax withholding	2026-03-14	6,089	$98.68	$600,863	Disposed (30,165 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2026-03-14	915	—	—	Acquired (31,080 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2026-03-14	35	—	—	Acquired (31,115 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Tax withholding	2026-03-14	509	$98.68	$50,228	Disposed (30,606 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2026-03-14	694	—	—	Acquired (31,300 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2026-03-14	17	—	—	Acquired (31,317 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Tax withholding	2026-03-14	381	$98.68	$37,597	Disposed (30,936 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2026-03-14	597	—	—	Acquired (31,533 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2026-03-14	6	—	—	Acquired (31,539 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Tax withholding	2026-03-14	323	$97.91	$31,625	Disposed (31,216 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Option exercise	2026-03-14	1,152	—	—	Acquired (3,087 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Option exercise	2026-03-14	43	—	—	Acquired (3,130 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Tax withholding	2026-03-14	351	$98.68	$34,637	Disposed (2,779 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Option exercise	2026-03-14	1,079	—	—	Acquired (3,858 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Option exercise	2026-03-14	27	—	—	Acquired (3,885 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Tax withholding	2026-03-14	325	$98.68	$32,071	Disposed (3,560 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Option exercise	2026-03-14	343	—	—	Acquired (3,903 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Option exercise	2026-03-14	3	—	—	Acquired (3,906 owned after)	EDGAR
RBA	Carlson Christopher	Chief Accounting Officer	Tax withholding	2026-03-14	102	$97.91	$9,987	Disposed (3,804 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2026-03-14	7,455	—	—	Acquired (115,024 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2026-03-14	202,712	—	—	Acquired (317,736 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Tax withholding	2026-03-14	89,448	$98.68	$8,826,729	Disposed (228,288 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2026-03-14	16,893	—	—	Acquired (245,181 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2026-03-14	622	—	—	Acquired (245,803 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Tax withholding	2026-03-14	7,455	$98.68	$735,659	Disposed (238,348 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2026-03-14	13,039	—	—	Acquired (251,387 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2026-03-14	321	—	—	Acquired (251,708 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Tax withholding	2026-03-14	5,687	$98.68	$561,193	Disposed (246,021 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2026-03-14	15,496	—	—	Acquired (261,695 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2026-03-14	178	—	—	Acquired (261,695 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Tax withholding	2026-03-14	6,671	$97.91	$653,158	Disposed (255,024 owned after)	EDGAR
RBA	Guerin Eric	Chief Financial Officer	Tax withholding	2026-03-14	1,256	$97.91	$122,975	Disposed (9,410 owned after)	EDGAR
RBA	Guerin Eric	Chief Financial Officer	Option exercise	2026-03-14	6,052	—	—	Acquired (9,767 owned after)	EDGAR
RBA	Guerin Eric	Chief Financial Officer	Option exercise	2026-03-14	150	—	—	Acquired (9,917 owned after)	EDGAR
RBA	Guerin Eric	Chief Financial Officer	Tax withholding	2026-03-14	2,442	$98.68	$240,977	Disposed (7,475 owned after)	EDGAR
RBA	Guerin Eric	Chief Financial Officer	Option exercise	2026-03-14	3,155	—	—	Acquired (10,630 owned after)	EDGAR
RBA	Guerin Eric	Chief Financial Officer	Option exercise	2026-03-14	36	—	—	Acquired (10,666 owned after)	EDGAR
RBA	Schmit Jennifer Laura	Chief People Officer	Option exercise	2026-03-14	1,052	—	—	Acquired (1,783 owned after)	EDGAR
RBA	Schmit Jennifer Laura	Chief People Officer	Option exercise	2026-03-14	16	—	—	Acquired (1,799 owned after)	EDGAR
RBA	Schmit Jennifer Laura	Chief People Officer	Tax withholding	2026-03-14	327	$98.68	$32,268	Disposed (1,472 owned after)	EDGAR
RBA	Schmit Jennifer Laura	Chief People Officer	Option exercise	2026-03-14	529	—	—	Acquired (2,001 owned after)	EDGAR
RBA	Schmit Jennifer Laura	Chief People Officer	Option exercise	2026-03-14	6	—	—	Acquired (2,007 owned after)	EDGAR
RBA	Schmit Jennifer Laura	Chief People Officer	Tax withholding	2026-03-14	164	$97.91	$16,057	Disposed (1,843 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Option exercise	2026-03-14	3,581	—	—	Acquired (3,581 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise 10b5-1	2026-01-21	20,742	$80.00	$1,659,360	Acquired (128,311 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Sale 10b5-1	2026-01-21	20,742	$115.00	$2,385,330	Disposed (107,569 owned after)	EDGAR
RBA	Stein Deborah	Director	Purchase	2025-11-13	1,000	$101.26	$101,258	Acquired (1,000 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Sale	2025-09-12	2,151	$118.15	$254,141	Disposed (0 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Sale	2025-08-13	10,000	$116.71	$1,167,100	Disposed (14,167 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Option exercise	2025-08-13	10,000	$57.70	$577,000	Acquired (24,167 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise 10b5-1	2025-07-14	45,658	$54.83	$2,503,428	Acquired (153,227 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Sale 10b5-1	2025-07-14	7,400	$110.00	$814,000	Disposed (24,874 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise 10b5-1	2025-07-14	7,400	$32.16	$237,984	Acquired (32,274 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Sale 10b5-1	2025-07-14	45,658	$110.00	$5,022,380	Disposed (107,569 owned after)	EDGAR
RBA	RAISS SARAH E.	Director	Tax withholding	2025-06-27	1,280	$102.51	$131,213	Disposed (2,785 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Sale 10b5-1	2025-06-11	3,700	$107.00	$395,900	Disposed (24,874 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise 10b5-1	2025-06-11	3,700	$32.16	$118,992	Acquired (28,574 owned after)	EDGAR
RBA	DeWitt Adam	Director	Sale 10b5-1	2025-06-10	800	$106.17	$84,936	Disposed (5,865 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Sale 10b5-1	2025-06-10	3,700	$106.17	$392,829	Disposed (24,874 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise 10b5-1	2025-06-10	3,700	$32.16	$118,992	Acquired (28,574 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Sale	2025-05-15	2,000	$106.96	$213,920	Disposed (14,167 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Sale	2025-05-13	4,142	$104.66	$433,502	Disposed (5,532 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Sale	2025-05-13	4,933	$104.77	$516,830	Disposed (5,532 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Option exercise	2025-05-13	4,933	$57.70	$284,634	Acquired (10,465 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Option exercise	2025-05-13	4,142	$70.58	$292,342	Acquired (9,674 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Sale	2025-05-12	3,500	$104.38	$365,330	Disposed (16,167 owned after)	EDGAR
RBA	DeWitt Adam	Director	Option exercise	2025-05-05	35	—	—	Acquired (6,665 owned after)	EDGAR
RBA	RAISS SARAH E.	Director	Option exercise	2025-05-05	2,630	—	—	Acquired (4,030 owned after)	EDGAR
RBA	Sieger Michael D	Director	Option exercise	2025-05-05	2,630	—	—	Acquired (5,666 owned after)	EDGAR
RBA	Sieger Michael D	Director	Option exercise	2025-05-05	35	—	—	Acquired (5,701 owned after)	EDGAR
RBA	Morrison Gregory B	Director	Option exercise	2025-05-05	35	—	—	Acquired (2,665 owned after)	EDGAR
RBA	Morrison Gregory B	Director	Option exercise	2025-05-05	2,630	—	—	Acquired (2,630 owned after)	EDGAR
RBA	RAISS SARAH E.	Director	Option exercise	2025-05-05	35	—	—	Acquired (4,065 owned after)	EDGAR
RBA	DeWitt Adam	Director	Option exercise	2025-05-05	2,630	—	—	Acquired (6,630 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Sale	2025-03-21	600	$98.63	$59,178	Disposed (19,667 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Sale	2025-03-17	7,597	$97.85	$743,366	Disposed (20,267 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Sale	2025-03-17	15,700	$97.81	$1,535,617	Disposed (107,569 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Tax withholding	2025-03-14	377	$94.43	$35,600	Disposed (24,874 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2025-03-14	694	—	—	Acquired (23,553 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2025-03-14	9	—	—	Acquired (22,859 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Tax withholding	2025-03-14	502	$94.43	$47,404	Disposed (22,850 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2025-03-14	23	—	—	Acquired (23,352 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2025-03-14	914	—	—	Acquired (23,329 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Tax withholding	2025-03-14	3,618	$94.43	$341,648	Disposed (22,415 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Option exercise	2025-03-14	7,731	—	—	Acquired (27,998 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Option exercise	2025-03-14	531	—	—	Acquired (28,529 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Tax withholding	2025-03-14	3,417	$94.43	$322,667	Disposed (25,112 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Option exercise	2025-03-14	1,464	—	—	Acquired (26,576 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Option exercise	2025-03-14	36	—	—	Acquired (26,612 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Tax withholding	2025-03-14	621	$94.43	$58,641	Disposed (25,991 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Option exercise	2025-03-14	40	—	—	Acquired (26,031 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Option exercise	2025-03-14	3,155	—	—	Acquired (29,186 owned after)	EDGAR
RBA	JETER JAMES J	Chief Revenue Officer	Tax withholding	2025-03-14	1,322	$94.43	$124,836	Disposed (27,864 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Option exercise	2025-03-14	20	—	—	Acquired (20 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Option exercise	2025-03-14	3,580	—	—	Acquired (3,600 owned after)	EDGAR
RBA	LEWIS MICHAEL THOMAS STEVEN	Chief Operations Officer	Tax withholding	2025-03-14	1,449	$94.43	$136,829	Disposed (2,151 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2025-03-14	435	—	—	Acquired (26,033 owned after)	EDGAR
RBA	Watt Darren Jeffrey	Chief Legal Officer	Option exercise	2025-03-14	6,327	—	—	Acquired (25,598 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Option exercise	2025-03-14	29	—	—	Acquired (5,398 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Option exercise	2025-03-14	1,153	—	—	Acquired (5,369 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Tax withholding	2025-03-14	862	$94.43	$81,399	Disposed (4,216 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Option exercise	2025-03-14	181	—	—	Acquired (5,078 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Option exercise	2025-03-14	2,633	—	—	Acquired (4,897 owned after)	EDGAR
RBA	KING NANCY ELIZABETH	Chief Technology Officer	Tax withholding	2025-03-14	2,412	$94.43	$227,765	Disposed (2,539 owned after)	EDGAR
RBA	Guerin Eric	Chief Financial Officer	Option exercise	2025-03-14	77	—	—	Acquired (77 owned after)	EDGAR
RBA	Guerin Eric	Chief Financial Officer	Option exercise	2025-03-14	6,050	—	—	Acquired (6,127 owned after)	EDGAR
RBA	Guerin Eric	Chief Financial Officer	Tax withholding	2025-03-14	2,412	$94.43	$227,765	Disposed (3,715 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Tax withholding	2025-03-14	362	$94.43	$34,184	Disposed (5,036 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Option exercise	2025-03-14	9	—	—	Acquired (19 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Option exercise	2025-03-14	706	—	—	Acquired (1,412 owned after)	EDGAR
RBA	Fesler Andrew John	Chief People Officer	Tax withholding	2025-03-14	219	$94.43	$20,680	Disposed (5,532 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2025-03-14	31,750	—	—	Acquired (117,997 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2025-03-14	2,183	—	—	Acquired (120,180 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Tax withholding	2025-03-14	14,442	$94.43	$1,363,758	Disposed (105,738 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2025-03-14	16,892	—	—	Acquired (122,630 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2025-03-14	422	—	—	Acquired (123,052 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Tax withholding	2025-03-14	7,369	$94.43	$695,855	Disposed (115,683 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2025-03-14	169	—	—	Acquired (115,852 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Option exercise	2025-03-14	13,038	—	—	Acquired (128,890 owned after)	EDGAR
RBA	KESSLER JAMES FRANCIS	Chief Executive Officer	Tax withholding	2025-03-14	5,621	$94.43	$530,791	Disposed (123,269 owned after)	EDGAR
RBA	KING NANCY ELIZABETH	Chief Technology Officer	Option exercise	2025-03-14	3,626	—	—	Acquired (3,659 owned after)	EDGAR
RBA	KING NANCY ELIZABETH	Chief Technology Officer	Option exercise	2025-03-14	33	—	—	Acquired (33 owned after)	EDGAR

Long US-equity 13F disclosures only · up to 45-day reporting lag · sells = reduce/avoid, not short. JSON: /api/signals · /api/funds · /api/status