NYSE:SEMG

Semgroup Class A Stock Insider Trading

*Your capital is at risk

$26.61

-0.228 (-0.85%)

At Close: Jun 03, 2026

SemGroup Class A Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at 0. In total, the insiders bought 20.87M and sold 47.69B SEMG shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	0
● Buy	20.87M shares
● Sell	47.69B shares
34% Buy Activity Negligible or No Correlation
No Significant Signals No statistically significant buy or sell signals detected in recent insider data.

Historical Insider Trades

Date	Type	Person	Role	Amount
Dec 05, 2019 Sell	Series A Cumulative Perpetual Convertible Preferred Stock U-Tender	Warburg Pincus (bermuda) Private Equity Gp Ltd. 10 Percent Owner	10% Owner	300 000 Value: $0
Dec 05, 2019 Sell	Series A Cumulative Perpetual Convertible Preferred Stock U-Tender	Warburg Pincus (bermuda) Private Equity Gp Ltd. 10 Percent Owner	10% Owner	300 000 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Mcadam William J Director	Director	19 300 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Lytal James H Director	Director	35 058 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Kurz Karl F Director	Director	48 780 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Barpoulis Sarah Morrison Director	Director	29 009 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Ballschmiede Ronald A Director	Director	12 008 Value: $0
Dec 05, 2019 Sell	Common STock D-Return	Ballschmiede Ronald A Director	Director	31 197 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Mcdaniel Thomas R Director	Director	47 013 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Mcadam William J Director	Director	19 300 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Lytal James H Director	Director	35 058 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Kurz Karl F Director	Director	48 780 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Barpoulis Sarah Morrison Director	Director	29 009 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Ballschmiede Ronald A Director	Director	12 008 Value: $0
Dec 05, 2019 Sell	Common STock D-Return	Ballschmiede Ronald A Director	Director	31 197 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Mcdaniel Thomas R Director	Director	47 013 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Conner Carlin G. President And CEO	CEO / President	315 492 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Fitzgerald Robert N EVP And CFO	C-Suite Officer	10 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Gosse David EVP Canada Ops And Commercial	Officer	66 917 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Lindberg Susan S EVP And General Counsel	Officer	48 530 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Minielly David M EVP Us Operations	Officer	91 865 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Revere Shaun M EVP Us Commercial	Officer	77 355 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Sell Thomas D Vp, Controller & Cao	Officer	32 995 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Conner Carlin G. President And CEO	CEO / President	315 492 Value: $0
Dec 05, 2019 Sell	Common Stock D-Return	Fitzgerald Robert N EVP And CFO	C-Suite Officer	10 Value: $0

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT SEMGROUP CORPORATION CLASS A

SemGroup Corporation provides gathering, transportation, storage, distribution, marketing, and other midstream services for producers, refiners of petroleum products, and other market participants. Its Crude Transportation segment operates crude oil pipelines and truck transportation businesses. As of December 31, 2015, this segment operated a 570-mile crude oil gathering and transportation pipeline system in Kansas and northern Oklahoma; a 16-mi...

Read Full Profile Here