InsidersTradesSigma
Total declarations
Company
▲ Purchases (0 ops.)
▼ Sales (137 ops.)
Insider track record
CEODisclosed buys
0
Disclosed sells
137
Not enough buy signals with a settled T+90 horizon to measure a track record yet.
Signal history
Explore the complete record of transactions filed by KEMPER J MARINER, Chairman and Chief Executive Officer. Officer active across 1 company, notably UMB Financial CORP. Aggregated, 173 reports have been logged. Breakdown: 0 buy · 137 sells. Total volume traded: €6.4m. History available since 3 May 2021. The latest transaction was filed on 21 February 2025 (Cession). Regulator: SEC (Form 4). All data is free.
Declarations173 total
2,899 shares@ US$108.552.1% of flowCommon StockSEC:0001127602-25-006711:0
1,134 shares@ US$112.940.9% of flowCommon StockSEC:0001127602-25-004895:0
1,124 shares@ US$114.170.9% of flowCommon StockSEC:0001127602-25-004623:0
1,634 shares@ US$113.241.3% of flowCommon StockSEC:0001127602-25-004394:0
1,878 shares@ US$114.111.5% of flowCommon StockSEC:0001127602-25-004146:0
14,021 shares0Common StockSEC:0001127602-25-003818:0
17,174 shares0Common StockSEC:0001127602-25-002649:0
24,191 shares0Common StockSEC:0001127602-25-002224:0
9,632 shares@ US$124.618.0% of flowCommon StockSEC:0001127602-24-028571:0
4,688 shares@ US$107.873.3% of flowCommon StockSEC:0001127602-24-026357:0
700 shares@ US$100.910.4% of flowCommon StockSEC:0001127602-24-024963:0
5,700 shares@ US$102.503.7% of flowCommon StockSEC:0001127602-24-023389:0
1,000 shares@ US$97.850.6% of flowCommon StockSEC:0001127602-24-022911:0
10,115 shares@ US$75.254.9% of flowCommon StockSEC:0001127602-24-021806:0
200 shares@ US$97.5250.1% of flowCommon StockSEC:0001127602-24-021635:0
293 shares@ US$97.000.2% of flowCommon StockSEC:0001127602-24-021634:0
264 shares@ US$93.220.2% of flowCommon StockSEC:0001127602-24-021639:0
100 shares@ US$95.250.1% of flowCommon StockSEC:0001127602-24-021644:0
47 shares@ US$94.610.0% of flowCommon StockSEC:0001127602-24-021643:0
108 shares@ US$93.890.1% of flowCommon StockSEC:0001127602-24-021642:0
17,849 shares@ US$75.258.8% of flowCommon StockSEC:0001127602-24-021638:0
541 shares@ US$93.440.3% of flowCommon StockSEC:0001127602-24-021640:0
100 shares@ US$97.24750.1% of flowCommon StockSEC:0001127602-24-021637:0
206 shares@ US$93.660.1% of flowCommon StockSEC:0001127602-24-021641:0
8,100 shares@ US$84.004.4% of flowCommon StockSEC:0001127602-24-020166:0
25 of 173 declarations
About KEMPER J MARINER
Kemper J. Mariner, better known as Mariner Kemper, is the Chairman and Chief Executive Officer of UMB Financial Corporation, a U.S.-listed financial services company. According to UMB’s official materials, he has served as chairman and CEO since 2004 and has led the organization for more than two decades. His career is closely tied to the company’s family legacy: he is a fifth-generation banker and the sixth Kemper leader associated with UMB, which was founded in 1913 in Kansas City. Before becoming the company’s top executive, he held a series of leadership roles inside the organization, including president of UMB Bank Colorado, n.a. and executive vice president of UMB Financial Corporation. Those positions gave him experience across bank operations, regional leadership, team management, and strategic execution. His background reflects a long-tenured internal career path rather than an external CEO appointment, with progression through increasingly senior roles over time. Academically, Kemper earned a Bachelor of Science degree in political science from the University of Puget Sound. Combined with decades in banking, that education supports a leadership style grounded in institutional continuity, disciplined management, and a long-term view of growth and client relationships. Under his leadership, UMB has expanded from a Midwestern banking franchise into a broader financial services platform. A major milestone during his tenure was the 2025 acquisition of Heartland Financial USA, Inc., described by the company as the largest acquisition in its history. That transaction materially increased UMB’s geographic reach and scale. Company communications also emphasize Kemper’s focus on risk management, compliance, governance, and operating performance. In addition to his executive responsibilities, he is associated with community and civic involvement, which reinforces an image of leadership centered on stewardship, local engagement, and sustainable value creation. For SEO and corporate biography purposes, he is best characterized as a long-serving banking executive, family-enterprise leader, and chief architect of UMB’s modern growth trajectory.
