Multiple securities law firms escalate class action campaign against Smartsheet (SMAR) as October 5 lead plaintiff deadline approaches

Executive summary: Rosen Law Firm issued a renewed reminder to investors who sold Smartsheet Inc. (NYSE: SMAR) common stock between June 1 and September 23, 2024, that the October 5, 2026 lead plaintiff deadline for a securities fraud class action lawsuit is approaching. A securities fraud class action with a defined class period and lead plaintiff deadline creates legal and financial risk for Smartsheet and potential compensation claims for affected investors; the involvement of at least five law firms signals broad litigation interest.

Who is involved: Smartsheet Inc. (NYSE: SMAR); Rosen Law Firm; Pomerantz LLP; Wolf Haldenstein Adler Freeman & Herz LLP; Robbins LLP; Berger Montague PC.

Likely next: The lead plaintiff motion deadline on October 5, 2026 will determine who controls the class action; after that, the court will rule on class certification and the litigation will move to discovery or settlement discussions.

Rosen Law Firm has again issued a reminder to investors who sold Smartsheet Inc. (NYSE: SMAR) common stock between June 1 and September 23, 2024, urging them to seek lead plaintiff status before the October 5, 2026 deadline. The announcement is the latest in a series dating back to early August 2026, with at least four other law firms — Pomerantz, Wolf Haldenstein, Robbins LLP, and Berger Montague — filing or advertising related class action lawsuits against the same company over the same class period. The legal action alleges securities fraud during the specified four-month window in 2024.

Timeline

2026-09-01 — SMAR Investors Have Opportunity to Lead Smartsheet Inc. Securities Fraud Lawsuit (PR Newswire)
2026-08-17 — Robbins LLP Urges SMAR Stockholders to Contact Robbins LLP for Information About Leading the Class Action — August 17, 2026 (PR Newswire)
2026-08-11 — ATTENTION NYSE: SMAR INVESTORS: Contact Berger Montague About a Smartsheet Inc. Class Action Lawsuit — August 11, 2026 (PR Newswire)
2026-08-07 — Rosen Law Firm announces class action lawsuit on behalf of sellers of Smartsheet Inc. (NYSE: SMAR) — August 6, 2026 (PR Newswire)

Analysis — what this means

Likely next events

October 5, 2026 — lead plaintiff deadline for the SMAR securities fraud class action; a lead plaintiff will be appointed shortly after
Post-October 5, 2026 — court will consider class certification motions; if certified, the class expands to all qualifying sellers
Potential settlement discussions or discovery proceedings in late 2026 or early 2027 depending on class certification outcome

Sectors affected

SaaS / cloud-based enterprise software
Securities litigation and class action legal services
NYSE-listed mid-cap technology stocks

Regulatory implications

Securities fraud class action under U.S. federal securities laws (likely Section 10(b) of the Securities Exchange Act of 1934 and Rule 10b-5) with lead plaintiff provisions under the PSLRA
Class period defined as June 1, 2024 to September 23, 2024 — the events triggering the alleged fraud occurred within this window
October 5, 2026 lead plaintiff deadline under the Private Securities Litigation Reform Act (PSLRA)

Historical parallels

Securities class actions against SaaS companies with concentrated stock drops — e.g., the 2022 class action against C3.ai following its post-IPO decline
Multiple law firms competing for lead plaintiff status in securities class actions is standard practice under the PSLRA, as seen in cases like the 2018 Facebook Cambridge Analytica class action where numerous firms filed within days