Hyliion stock falls 6.75 percent amid lawsuit disclosure

Published on 09/28/2026 at 21:42 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

Hyliion stock was at USD 3.94 on September 28, 2026, down 6.75 percent in afternoon trading. Q2 revenue rose to USD 4.944 million from USD 1.515 million.

HYLN, US4491091074, Illustration mit AI erstellt.

Hyliion stock (ISIN US4491091074) was trading at USD 3.94 on NYSE American at 3:39 p.m. ET on September 28, 2026, down USD 0.28, or 6.75 percent, from the prior close. The same session showed a high of USD 4.13 and a low of USD 3.93, while market capitalization stood at USD 701.7 million. The immediate legal backdrop is a securities class action notice carrying an October 27, 2026 deadline.

Class action sets October deadline

According to GlobeNewswire on September 28, 2026, Kaplan Fox said a lawsuit had been filed on behalf of investors who acquired Hyliion securities between May 12, 2026 and June 23, 2026. The notice says eligible investors may seek appointment as lead plaintiff by October 27, 2026.

The filing describes allegations concerning a May 12 partnership announcement involving VFG and a later research report questioning the counterparty. Those are allegations in the complaint, not established findings, but they form the clearest current risk marker for the shares.

Revenue expands from a small base

Hyliion reported second-quarter 2026 revenue of USD 4.944 million, compared with USD 1.515 million in the second quarter of 2025, a 226.34 percent increase. CEO.CA reported the figures from Hyliion's August 11, 2026 results release, which identified research and development services as the revenue source.

The comparison has a clear counterweight. Second-quarter net loss was USD 13.928 million versus USD 13.414 million a year earlier, while gross profit was USD 0.366 million. The revenue increase therefore has not yet translated into quarterly profitability.

NYSE Texas adds a second venue

Hyliion announced on September 22, 2026 that its common stock would also trade on NYSE Texas under HYLN, while NYSE American remained the primary listing. StockTitan reported that the dual listing became effective on that date.

For investors, the price reaction and the legal timetable now sit alongside an operating story that is growing quickly from a limited revenue base. Hyliion's 52-week range of USD 1.56 to USD 8.49 places the September 28 price 53.59 percent below the high and 152.56 percent above the low.

Hyliion stock trades below USD 4.00

Hyliion stock was last at USD 3.94 on NYSE American on September 28, 2026 at 3:39 p.m. ET, with 1,095,177 shares traded. The market capitalization was USD 701.7 million on the same date.