September 11, 2017 - The court granted in part and denied in part defendants' motion to dismiss.
January 13, 2017 - Defendants filed a motion to dismiss.

November 11, 2016 - The lead plaintiffs filed an amended consolidated complaint on behalf of investors who purchased SandRidge Mississippian Trust I (NYSE: SDT) common units of Trust I, pursuant or traceable to Trust I’s initial public offering, declared effective on April 5, 2011; and/or Trust II, pursuant or traceable to Trust II’s initial public offering, declared effective on April 17, 2012 or/and who purchased common units of Trust I, between April 5, 2011, and November 8, 2012. The lead plaintiffs allege that the defendants violated the Securities Act of 1933 and the Securities Exchange Act of 1934 by issuing false and misleading statements between April 5, 2011 and November 8, 2012.

August 10, 2015 - Lead plaintiff motions were filed.

June 9, 2015 - An investor in shares of SandRidge Mississippian Trust I (NYSE: SDT) filed a lawsuit in the U.S. District Court for the Western District of Oklahoma over alleged violations of Federal Securities Laws by SandRidge Mississippian Trust I and SandRidge Mississippian Trust II in connection with certain allegedly false and misleading statements made between April 7, 2011 and November 8, 2012.

According to the complaint the plaintiff alleges on behalf of investors who purchased or otherwise acquired common units of the SandRidge Mississippian Trust I (NYSE: SDT) pursuant or traceable to the SandRidge Mississippian Trust I’s initial public offering on or about April 7, 2011, and/or at other times during the time period between April 7, 2011 and November 8, 2012, and/or investors who purchased or otherwise acquired common units of the SandRidge Mississippian Trust II (NYSE: SDR) pursuant or traceable to the SandRidge Mississippian Trust II’s initial public offering on or about April 17, 2012, and/or at other times between April 7, 2011 and November 8, 2012, that the defendants violated Federal Securities Laws.

More specifically, the plaintiff claims that between April 7, 2011 and November 8, 2012 defendants made allegedly false and/or misleading statements and allegedly failed to disclose that: (1) the underlying properties from which the royalty interests were conveyed to SandRidge Mississippian Trust I consisted of far more low-margin natural gas deposits and far fewer high-margin oil deposits, and (2) the reserves of oil in the underlying properties associated with Trust I were vastly overstated.

SandRidge Mississippian Trust I reported that its annual Total Revenue rose from $57.52 million in 2011 to $90.00 million in 2012 and that its Net Income increased from $52.80 million in 2011 to $83.68 million in 2012.

Shares of SandRidge Mississippian Trust I (NYSE: SDT) grew from $22.49 per share in September 2011 to as high as $35.06 per share in February 2012.

SandRidge Mississippian Trust I reported that its annual Total Revenue declined from $90 million in 2012 to $69.64 million in 2013, respectively $37.64 million in 2014 and that its Net Income of $83.68 million in 2012 decreased to $63.71 million in 2013, respectively $33.89 million in 2014.

Shares of SandRidge Mississippian Trust I (NYSE: SDT) declined from over $35 per share in February 2012 to as low as $3.19 per share in late 2014, respectively $3.15 per share in March 2015.

On June 9, 2015, NYSE: SDT shares closed at $4.59 per share.