Public (NYSE: STEM); received an NYSE delisting warning
Live · STEM· NYSE
as of 2026-09-17
$4.72▼ 7.81% today
≈ $45.4 Million market cap · −98.5% from peak
The rise & fall
6 moments · 2009–2024
The key moments, with employee sentiment along the way.
2009
🌱
2009
Founded in California
Batteries plus brains: the Athena software learns when to charge and discharge storage assets to shave energy costs.
Wikipedia
Apr 2021
🦄
Apr 2021
Joins the club via SPAC
Merges with Star Peak Energy Transition Corp and goes public at the height of clean-energy enthusiasm.
SEC filing
2021
📈
2021
The peak: ~$3B post-merger high$3B
The stock runs up after the debut; the AI-for-batteries story commands about $3B.
Motley Fool
2022
💔
2022
Slips out of the club
Bookings and revenue fall, losses persist, and the de-SPAC premium evaporates.
Motley Fool
2022–24
💬
From the inside · Glassdoor reviews, 2022–24
Through the slide, Glassdoor reviews described constant strategy pivots and leadership turnover, recurring layoff rounds that staff said repeatedly landed before stock grants vested, and a hardware-versus-software identity question that stayed unresolved as talent left.
Sep 2024
Sep 2024
CEO out as the stock loses its footing
A strategic review begins; with the shares sliding under $1, an NYSE delisting warning follows.
Energy-Storage.news
Today
Today
Still in the club — and still trading
Live · STEM · NYSEas of 2026-09-17
$4.72▼ 7.81% today≈ $45.4M cap · −98.5% from peak
💬 entries paraphrase anonymous, unverified reviews posted publicly on Glassdoor ↗; dated facts carry their source.
How it happened
Stem Inc sells AI-driven software (Athena) and services to optimize battery-storage and solar assets, and went public in April 2021 via a SPAC merger with Star Peak Energy Transition Corp amid clean-energy enthusiasm.
Growth disappointed, bookings and revenue fell, and losses persisted; the stock dropped about 97% from its post-merger highs, traded below $1 and drew an NYSE delisting warning. Its CEO stepped down in 2024 as the company launched a strategic review.
Source: Motley Fool / Energy-Storage.news / SEC (SPAC merger with Star Peak Energy Transition Corp April 2021; stock fell ~97% from post-SPAC highs; CEO stepped down Sept 2024; NYSE sub-$1 warning)
Who ran it
JC
John Carrington
CEO who led Stem through its SPAC listing and peak; stepped down Sept 2024
