Norman Banks appeals the district court’s 1 dismissal of his suit against his former employer, Ameren UE (AUE); his former supervisor, Craig Sherrill; and his former union, IBEW Local 1439. Banks *417 brought numerous claims and alleged numerous ways in which defendants wronged him. On appeal, however, Banks challenges the dismissal only as to certain issues surrounding his fraud claim, and his claim for penalty wages under Mo.Rev. Stat. § 290.110. Thus, we consider only those issues. See In re MidAm. Energy Co., 286 F.3d 483, 487 (8th Cir. 2002) (per curiam) (claims not raised in appeal brief are waived).

First, we agree with the district court that Banks failed to state a fraud claim under Missouri law because he did not allege reliance on any of defendants’ allegedly fraudulent representations or actions. See Trimble v. Pracna, 167 S.W.3d 706, 712, 712 n. 5 (Mo. 2005) (nine essential elements of fraud, including hearer’s reliance on representation’s truth; plaintiff cannot recover for fraud without establishing reasonable reliance on truth of representation claimed to be false). In fact, Banks’s complaint shows that he believed the representations and actions to be fraudulent when each occurred.

Second, the district court did not abuse its discretion in denying Banks’s motion to amend his complaint, which was filed after the final order of dismissal and after Banks had earlier stated in response to a dismissal motion that his allegations were “enough to cover the elements for fraud.” Cf. Parnes v. Gateway 2000, Inc., 122 F.3d 539, 550-51 (8th Cir. 1997) (after complaint is dismissed, right to amend under Fed.R.Civ.P. 15(a) terminates; leave to amend may still be granted, but district court does not abuse its discretion in refusing to allow amendment of pleadings to change theory of case if no valid reason is shown for failure to present new theory at earlier time).

Third, Banks’s penalty-wage claim failed because his February 11, 2005 request for penalty wages from AUE—nearly five years after his employment with AUE ended on March 1, 2000—was untimely under Missouri common law. See Monterosso v. St. Louis Globe-Democrat Publ’g Co., 368 S.W.2d 481, 485-86, 489 (Mo. 1963) (holding that requests for unpaid wages under § 290.110 which had been sent to employer at least 90 days and in some cases 180 days after discharge were untimely because employees had waited an unreasonable amount of time to present the requests to employer).

Finally, the additional arguments Banks raises regarding his fraud claim are merit-less.

Accordingly, we affirm.