The October 29 hearing on Marshall's and McGahee's opinions is the next key catalyst — if the court excludes Marshall's causation analysis, Appian's remaining damages case collapses; if McGahee is excluded, Pega's damages case weakens. Monitor for the ruling and any settlement pressure ahead of trial.
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Executive Summary
The court issued a mixed ruling on pre-trial Daubert motions in the Pegasystems v. Appian trade-secrets/disparagement case. Key expert opinions for both sides were partially excluded or reserved for a hearing: Pega's expert Marshall's causation opinions and Appian's expert McGahee's damages opinions face a show-cause hearing on October 29; Pega's expert Robinson was largely excluded (only allowed on 'information' vs 'software'), and Appian's $2 billion disgorgement theory was excluded. The case proceeds to trial with narrowed expert testimony, removing the most extreme damages claim but leaving significant causation and damages questions unresolved.
Court Ruling Details
Key Facts
- Court excluded Appian's $2 billion disgorgement theory (Vanderhart) as based on 'speculation and improbable inferences'.
- Pega's expert Robinson was largely excluded; only allowed to opine on the distinction between 'information' and 'software'.
- Pega's expert Marshall's opinions on 95 competitive opportunities and Appian's expert McGahee's damages causation opinions face a show-cause hearing on October 29, 2026.
- Appian's expert Gianturco was excluded entirely as his rebuttal opinions are no longer relevant after Robinson's exclusion.
- Pega's expert Drum (financial strength to pay $2B Virginia judgment) was allowed to testify.
- Appian's expert Butler (survey on misleading social media posts) was allowed, with weight challenges noted.
- Appian's expert Pearlson (critique of Marshall) was allowed.
Financial Impact
Appian's $2 billion disgorgement claim was excluded; remaining damages theories (Vanderhart's $109M lost profits/disgorgement) are contingent on Marshall's causation opinions, which are under review.
Risk Factors
- If Marshall's causation opinions are excluded, Appian's damages case is severely limited.
- If McGahee's damages opinions are excluded, Pega's ability to prove harm from Appian's statements is reduced.
- The case remains active with trial pending; further pre-trial rulings could shift settlement leverage.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 1 court opinion.
| Document | Accession Number |
|---|---|
| COURT-RULING Data (Synthetic) | court-43aa997fe5-PEGA |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 22, 2026 4d ago | Court Ruling | $36.42 | awaiting T+20 | — | $36.71 (+0.80%) |
Oct 21, 2026 5d ago | Court Ruling | $36.65 | awaiting T+20 | — | $36.71 (+0.16%) |
Oct 20, 2026 6d ago | 8-K | $35.18 | awaiting T+20 | — | $36.71 (−4.35%) |
Sep 17, 2026 5w ago | Insider Cluster | $35.02 $34.54 | ▼ −1.37% | ▼ −1.57% | $36.71 (+4.83%) |
Sep 15, 2026 5w ago | Insider Cluster | $36.84 $33.83 | ▼ −8.17% | ▼ −10.23% | $36.71 (−0.35%) |
Sep 15, 2026 5w ago | Insider Cluster | $36.84 $33.83 | ▲ +8.17% | ▲ +10.23% | $36.71 (+0.35%) |
Jun 8, 2026 20w ago | 8-K | $34.16 $32.21 | ▼ −5.71% | ▼ −7.15% | $36.71 (+7.46%) |
Apr 24, 2026 26w ago | DEFA14A | $36.77 $34.33 | ▼ −6.64% | ▼ −11.59% | $36.71 (−0.16%) |
Apr 21, 2026 26w ago | 8-K | $37.48 $33.50 | ▲ +10.62% | ▲ +13.78% | $36.71 (+2.05%) |
Mar 10, 2026 32w ago | Insider Cluster | $44.66 $41.20 | ▼ −7.74% | ▼ −7.59% | $36.71 (−17.80%) |
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