Postdecree Sale of Restricted Stock Units as a Material Change Permitting Child Support Modification; Preclusion Inapplicable Where New Facts Arise

Introduction

In Kingston v. Kingston, 320 Neb. 981 (Neb. Mar. 13, 2026), the Nebraska Supreme Court reviewed a postdecree child support modification dispute between former spouses Laura A. Kingston (appellee/cross-appellant) and Trevor L. Kingston (appellant/cross-appellee).

The dissolution decree had set child support based on Trevor’s salary and bonuses, but excluded restricted stock units (“RSUs”) from his “income” for child support—while still dividing RSUs as marital property. After the decree, Trevor began selling RSUs (which he had not sold during the marriage). Laura filed a complaint to modify, arguing that child support should be recalculated with RSU proceeds included as income and sought retroactivity to the month after filing.

The key issues were: (1) whether Trevor’s postdecree RSU sales constituted a material change in circumstances; (2) whether claim preclusion or issue preclusion barred relitigation of RSUs as income given the original decree’s treatment; (3) whether, and how, RSU-related income (and taxes) could be included in support calculations; and (4) how far back any increase should be applied retroactively and whether attorney fees should be awarded.

Summary of the Opinion

The Supreme Court affirmed the district court’s order adopting the child support referee’s recommendations:

  • A material change in circumstances existed because Trevor began selling RSUs after the decree, altering his financial position in a way not contemplated at the time of dissolution.
  • Preclusion doctrines did not bar modification because the modification proceeding presented a different issue—whether RSUs should be treated as income after postdecree sales commenced.
  • The district court did not abuse its discretion by including RSU proceeds as income in light of the flexible approach to income and the guidance of Vanderveer v. Vanderveer.
  • The district court did not abuse its discretion in averaging bonus income, estimating RSU income using vested shares, or accounting for RSU-related taxes.
  • It was not error to decline to add reimbursement deadlines where Trevor did not file his own complaint to modify seeking such relief.
  • Retroactivity to February 2024 (rather than the month after filing in May 2023) was within the court’s equitable discretion.
  • Denial of attorney fees to Laura was not an abuse of discretion.

Analysis

Precedents Cited

1) Standards of review and discretionary framework

  • Freeman v. Groskopf, 286 Neb. 713, 838 N.W.2d 300 (2013): Cited for the core appellate posture in support modification and retroactivity—review is de novo on the record, but the trial court is affirmed absent abuse of discretion. Kingston applies this “deferential discretion” lens repeatedly: even where the Supreme Court independently reviews the record, it asks whether the trial court’s choices were untenable or unreasonable.
  • Tilson v. Tilson, 307 Neb. 275, 948 N.W.2d 768 (2020): Cited for discretionary attorney-fee standards in modification actions. The court uses Tilson to anchor its conclusion that fee-shifting is optional and fact-sensitive.

2) Material change in circumstances

  • Hotz v. Hotz, 301 Neb. 102, 917 N.W.2d 467 (2018): Supplies the two-part threshold test for modification: the change must occur after the decree (or prior modification) and must not have been contemplated when the decree was entered. Kingston applies Hotz to frame the “threshold inquiry,” then identifies the postdecree RSU sales as the qualifying change.
  • Fetherkile v. Fetherkile, 299 Neb. 76, 907 N.W.2d 275 (2018): Lists factors relevant to whether a material change exists (financial position, children’s needs, good/bad faith motive, and whether change is temporary or permanent). Kingston uses these factors to validate the referee’s view that three years of RSU sales look durable rather than transient, and that the sales increased available funds.

3) Treatment of RSUs as income in child support

  • Vanderveer v. Vanderveer, 310 Neb. 196, 964 N.W.2d 694 (2021): The central substantive guidepost. Vanderveer held there was “no principled reason to exclude all RSU income” where evidence showed vested RSUs were sold and produced significant funds beyond salary and bonus. Kingston extends Vanderveer’s functional principle to a modification posture: once Trevor began selling vested RSUs, the district court could treat those proceeds as income under the child support framework.

    Importantly, Kingston also clarifies a frequent litigant argument: even if parties frame Vanderveer as “new law,” the court need not decide that question where the actual “material change” is factual (postdecree sales), not doctrinal.
  • Cronin v. Cronin, 31 Neb. App. 38, 977 N.W.2d 273 (2022): Distinguished. Cronin expressed concern with averaging the value of unvested RSUs because future vesting price is unknown. Kingston distinguishes that problem by emphasizing the referee’s method used vested shares, reducing speculation.

4) Preclusion doctrines and the “new facts” principle in modification

  • Ichtertz v. Orthopaedic Specialists of Neb., 273 Neb. 466, 730 N.W.2d 798 (2007), and Moulton v. Board of Zoning Appeals, 251 Neb. 95, 555 N.W.2d 39 (1996): Cited for the recognized principle that claim preclusion does not apply where there is an intervening change in facts or circumstances. Kingston treats this not merely as an “exception,” but as a logical consequence of what preclusion doctrines require.
  • Hara v. Reichert, 287 Neb. 577, 843 N.W.2d 812 (2014): Cited for the requirement that issue preclusion applies only where an “identical issue” was decided previously. Kingston reasons that once material circumstances change, the issue is no longer identical.
  • Schaeffer v. Frakes, 313 Neb. 337, 984 N.W.2d 290 (2023): Cited for the scope of claim preclusion (matters actually litigated and those that could have been litigated). Kingston uses it to explain why claim preclusion cannot bar a claim dependent on post-judgment facts—it could not have been litigated earlier.
  • Weaver v. Weaver, 308 Neb. 373, 954 N.W.2d 619 (2021): Provides the frequently quoted proposition that a material change is a “threshold inquiry,” and prior determinations are preclusive “in the absence of proof of new facts and circumstances.” Kingston uses Weaver to articulate the boundary: preclusion yields when the threshold is met.

5) Income calculations: averaging, invited error, and guidance

  • City of Omaha Human Relations Dept. v. City Wide Rock & Exc. Co., 201 Neb. 405, 268 N.W.2d 98 (1978): Cited for “invited error”—a party cannot complain of an error the party was instrumental in bringing about. Kingston applies this to Trevor’s objection to averaging bonuses because he testified averaging was appropriate.
  • Gress v. Gress, 274 Neb. 686, 743 N.W.2d 67 (2007): Cited for the rule that when income has fluctuated during the immediate past three years, it may be averaged. Kingston uses Gress to confirm the trial court’s discretion to smooth volatility in bonuses.
  • Peter v. Peter, 262 Neb. 1017, 637 N.W.2d 865 (2002): Cited to highlight the limitation on averaging—where income is consistently increasing, averaging may be inappropriate. Kingston contrasts that scenario with Trevor’s fluctuating bonuses.
  • Neb. Ct. R. ch. 4, art. 2, worksheet 1, n.5 (rev. 2016): Cited in connection with the mechanics of income averaging and calculation methodology under Nebraska’s child support guidelines.

6) Retroactivity and equity

  • Johnson v. Johnson, 290 Neb. 838, 862 N.W.2d 740 (2015): Cited for the presumption-like principle that, absent equities to the contrary, modification should apply retroactively to the first day of the month following filing. Kingston relies on Johnson to frame retroactivity, then emphasizes the “equities to the contrary” escape valve.
  • Wilkins v. Wilkins, 269 Neb. 937, 697 N.W.2d 280 (2005): Cited for the relevance of ability to pay as part of the retroactivity equity analysis. Kingston uses this to validate considering Trevor’s asserted need to liquidate additional RSUs and incur taxes to fund a larger retroactive arrearage.

7) Attorney fees

  • Garza v. Garza, 288 Neb. 213, 846 N.W.2d 626 (2014): Cited for the proposition that attorney fees may be awarded in modification proceedings, but the decision is discretionary. Kingston uses Garza to uphold the no-fee order given the court’s view that both parties contributed to the duration of litigation.

Legal Reasoning

1) The “material change” was factual—postdecree monetization of RSUs

Kingston’s core move is to locate the modification trigger not in an abstract debate about whether Vanderveer v. Vanderveer created “new law,” but in concrete postdecree conduct: Trevor began converting RSUs into spendable cash after the decree. The court treats this as a meaningful shift in “financial position” under Fetherkile v. Fetherkile, and as a change not shown to have been “contemplated” at the time of the decree under Hotz v. Hotz.

The opinion implicitly underscores a practical lesson: even if an asset type (like RSUs) existed at decree time and was divided as property, a later, repeatable pattern of monetization can change the child support calculus because child support is grounded in current and anticipated income streams.

2) Preclusion falls away once the threshold is met

Trevor’s preclusion argument was doctrinally intuitive—RSUs were litigated at dissolution, and the court then excluded them from income—so why can Laura revisit that? Kingston answers by tightly linking modification law to preclusion requirements:

  • Under Hara v. Reichert, issue preclusion needs an “identical issue.” When circumstances change, the issue is no longer identical.
  • Under Schaeffer v. Frakes, claim preclusion covers claims that could have been litigated. A claim dependent on postdecree sales could not have been litigated earlier.
  • Consistent with Weaver v. Weaver, once new facts are proven, the prior decree is not preclusive.

This reasoning is broader than the RSU context: Kingston articulates a general explanation of why preclusion doctrines are structurally ill-suited to bar a modification claim after new, consequential facts arise.

3) Including RSU proceeds as income is consistent with Vanderveer’s flexible approach

Kingston treats Vanderveer as providing two key interpretive principles:

  1. Courts should be wary of categorical exclusions of RSU-related funds from income where RSUs are being sold and producing realizable financial benefit.
  2. Courts need not choose a rigid “either property or income” classification; income determination for child support is flexible and context-dependent.

Trevor’s attempted distinctions—he historically did not sell RSUs and the RSUs were divided in the decree—did not overcome the central similarity: once Trevor began selling vested RSUs, he was receiving significant additional funds beyond salary and bonuses. Under the abuse-of-discretion standard, the Supreme Court found the trial court’s inclusion of RSUs was a reasonable application of that flexible approach.

4) Methodology: averaging, vested-share calculations, and tax accounting

The court then defends several pragmatic calculation choices:

  • Bonus averaging: upheld both because Trevor invited the approach (under City of Omaha Human Relations Dept. v. City Wide Rock & Exc. Co.) and because averaging fluctuating income is permitted under Gress v. Gress (and not barred by Peter v. Peter because the bonuses were not consistently trending).
  • RSU income estimation: Cronin v. Cronin is distinguished because Kingston uses vested shares, not speculative unvested values.
  • RSUs previously transferred to Laura: the referee’s decision not to subtract those shares from the averaging baseline is upheld as a forward-looking tool to estimate likely ongoing RSU-related income once Laura’s entitlement ends under the decree (early 2025).
  • Taxes: Trevor’s challenge was rejected as underdeveloped and not tied to an explained numerical consequence. The court treated the referee’s tax adjustment as within discretion.

5) Retroactivity: “absent equities to the contrary” is a real constraint, not a slogan

Although Johnson v. Johnson creates a strong expectation of retroactivity to the month after filing, Kingston emphasizes the qualifier: equity can justify a different date. Trevor’s evidence that a longer retroactive period would require additional RSU liquidation and added tax consequences, and thus affect ability to pay (a factor referenced in Wilkins v. Wilkins), supported the district court’s compromise retroactivity date.

Kingston therefore reads Johnson as creating a default, not a mandate; it preserves broad trial-court discretion to calibrate retroactivity within equitable bounds.

Impact

  • RSU monetization as a modification trigger: The case reinforces that when RSUs shift from a “hold for retirement” posture to actual sale proceeds, that change can constitute a material change in circumstances supporting an upward support modification.
  • Preclusion arguments will rarely defeat true modification claims: Kingston supplies a clear analytical framework for rejecting claim/issue preclusion defenses once postdecree facts materially change. Practitioners should expect courts to focus on whether the modification issue is genuinely new (postdecree facts) rather than whether the asset type was discussed at dissolution.
  • Guidance on RSU valuation methodology: By distinguishing Cronin v. Cronin, Kingston signals that courts should prefer using vested data (vested shares and prices) over projecting unvested values.
  • Retroactivity remains equitable, not automatic: Even with the Johnson default, Kingston demonstrates courts may select a later retroactivity date where the payer shows credible cash-flow and tax consequences—particularly when payment would require additional asset liquidation.
  • Litigation strategy: Trevor’s failure to file his own complaint to modify doomed his request for added reimbursement deadlines, underscoring the procedural point that affirmative decree edits generally require affirmative pleading.

Complex Concepts Simplified

Restricted Stock Units (RSUs)
Employer compensation that becomes actual shares only after “vesting.” Before vesting, the employee generally cannot sell them and may forfeit them if employment ends. Once vested and sold, they create real, spendable funds that courts may treat as “income” for child support, depending on circumstances.
Material change in circumstances
A significant, postdecree change that was not contemplated at the time of the decree and that justifies revisiting child support. In Kingston, the change was not the existence of RSUs, but the new pattern of selling them.
Issue preclusion (collateral estoppel)
Prevents re-deciding an “identical issue” already decided. If facts materially change, the issue is no longer identical, so issue preclusion generally does not apply in genuine modification settings.
Claim preclusion (res judicata)
Prevents re-litigating claims that were or could have been brought earlier. A claim based on events that occur after the prior judgment could not have been raised earlier and thus is not barred.
Retroactive modification
Applying the new support amount to earlier months, creating an arrearage. Nebraska’s default favors retroactivity to the month after filing, but equity can move the date forward or otherwise adjust the remedy.
Abuse of discretion
A high bar for reversal. The appellate court will not substitute its judgment so long as the trial court’s decision is within the range of reasonable options supported by the record.

Conclusion

Kingston v. Kingston solidifies two practical principles in Nebraska child support modification law: (1) a postdecree pattern of selling RSUs—particularly where RSUs previously were held—can constitute a material change in circumstances supporting modification and inclusion of RSU proceeds as income; and (2) once genuine new facts are proven, claim preclusion and issue preclusion do not bar the court from recalculating support because the modification presents a different, postdecree issue.

The decision also reinforces trial-court flexibility in income calculation (including averaging fluctuating compensation), confirms that retroactivity remains an equitable determination under Johnson v. Johnson, and illustrates the procedural necessity of seeking affirmative decree changes through proper pleadings.