When was Polarium founded?

Polarium was founded in 2015 and became a unicorn in 2022.

Where is Polarium located?

Polarium is headquartered in Stockholm, Sweden.

How many employees does Polarium have?

As of Sep 30, 2026, the latest employee count at Polarium is 268.

Is Polarium a funded company?

Polarium is a funded company, having raised a total of $274M across 5 funding rounds to date. The company's 1st funding round was raised for an undisclosed amount in a Series B round.

How much is Polarium worth?

The latest valuation of Polarium is $1B as of May 03, 2022.

When was the latest funding round of Polarium?

Polarium's latest funding was a $49.4M Series D round on Oct 01, 2024, with participation from 1 investor.

What is the annual revenue of Polarium?

Annual revenue of Polarium is between $100M and $500M as on Dec 31, 2024

Is Polarium a Smart Grid company?

The primary sectors of Polarium are Smart Grid, Energy Efficiency Tech and Energy Storage Tech.

Where does Polarium rank among its competitors?

Polarium ranks 18th amongst 1851 active competitors, of which 219 are funded. It stands 4th in terms of total funding among its competitors. The most recent competitor to raise funding was Base Power, which secured $1B in Aug, 2026.

Who are the top competitors of Polarium?

Polarium's top competitors include Particle, A123 Systems and Enel X. Among them, Base Power secured the most recent funding round in August, 2026.

Polarium - 2026 Company Profile, Team, Funding, Competitors & Financials

Polarium is a series D company based in Stockholm (Sweden), founded in 2015 by Stefan Jansson and Krister Thour. It operates as a Manufacturer of lithium ion battery energy storage and management systems. Polarium has raised $274M in funding from investors like Alecta, Northvolt and Vargas Holding, with a current valuation of $1B. The company has 1851 active competitors, including 219 funded and 136 that have exited. Its top competitors include companies like Particle, A123 Systems and Enel X.

Sectors and market segments that Polarium operate in

Polarium serves in the Energy Tech, Environment Tech, Sustainability Tech market segments.The primary business model of Polarium are:

Company Details

Manufacturer of lithium ion battery energy storage and management systems. These products provide reserve power, energy cost reduction, and grid stability for residential, commercial, industrial, and telecommunications applications. It offers energy storage and optimization platforms that help businesses convert electricity into measurable value. It delivers integrated hardware and software for real‑time monitoring, control, and data analytics of battery systems.

Website: polarium.com
Social
Email ID: *****@polarium.com
Phone Number: +46 **********

Key Metrics

Founded Year

2015

Location

Stockholm, Sweden

Stage

Series D

Total Funding

$274M in 5 rounds

Latest Funding Round

Series D, Oct 01, 2024, $49.4M

Post Money Valuation

$1B as on May 03, 2022

Investors

Alecta & 8 more

Ranked

18^th among 1851 active competitors

Annual Revenue

$100M - $500M as on Dec 31, 2024

Employee Count

268 as on Sep 30, 2026

Similar Companies

Particle & 879 more

View Polarium's full profile

Polarium is associated with 1 legal entity given below:

Legal Entity Name	Date of Incorporation	Revenue	Latest Employee Count	Documents
Polarium Energy Solutions Ab CIN: 5569865461 , Sweden, Active	Oct 15, 2014	$100M - $500M (As on Dec 31, 2024)	-	-

Polarium has raised a total funding of $274M over 5 rounds. Its latest funding round was a Series D round on Oct 01, 2024 for $49.4M. 1 investor participated in its latest round. Polarium has 7 institutional investors and 2 angel investors.

Here is the list of recent funding rounds of Polarium:

Filter this list

Date of Funding	Funding Amount	Round Name	Post-Money Valuation	Revenue Multiple	Lead Investors	Other Investors
Oct 01, 2024	$49.4M	Series D	-	-	Northvolt	-
Sep 04, 2023	$39.5M	Series D	-	-	-	Vargas Holding, Alecta
Oct 18, 2022	$84.6M	Series D	-	-	Alecta	Formica, Absolute Unlisted

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View details of Polarium's funding rounds and investors

The founders of Polarium are Stefan Jansson and Krister Thour. Leif Ottosson is the CEO of Polarium.

Here are the details of Polarium's key team members:

Stefan Jansson: Founder of Polarium. They serve on the board of 1 company.
Contact Info: 1 email address
Krister Thour: CTO, Co-Founder of Polarium.
Leif Ottosson: CEO of Polarium.
Contact Info: 1 email address

Polarium's Board of Directors

Polarium's board has 5 active members. Stefan Jansson and Olof Harald are part of team and Joakim Sundby Johansen, Lars Håkan Pavel Roos and John Peter Leesi are independent board members.

Here is the list of Polarium's board of directors:

Name	Type	Representing	Status	Duration
Stefan Jansson	Team	-	Current	-
Olof Harald	Team	-	Current	-
Joakim Sundby Johansen	Independent board member	-	Current	-
Lars Håkan Pavel Roos	Independent board member	-	Current	-
John Peter Leesi	Independent board member	-	Current	-

View details of Polarium's Founder profiles and Board Members

Polarium's employee count trend

Polarium has 268 employees as of Sep 26. Here is Polarium's employee count trend over the years:

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Top competitors of Polarium include Particle, A123 Systems and Enel X. Here is the list of Top 10 competitors of Polarium, ranked by Tracxn score:

Rank	Company Details	Short Description	Total Funding	Investors	Tracxn Score
1st	Particle 2011, San Francisco (United States), Acquired	Developer of a prototype to production connectivity platform for IoT	$135M	Root Ventures, Qualcomm Ventures & 20 others	78/100
2nd	A123 Systems 2001, Hangzhou (China), Public	Manufacturer of automotive lithium-ion batteries	$201M	General Electric, Qualcomm Ventures & 19 others	76/100
3rd	Enel X 2001, Boston (United States), Acquired	Developer of utility-scale renewable energy projects	$168M	Foundation Capital, Glen Capital & 9 others	75/100
4th	Amperehour Solar Technology 2017, Pune (India), Series A	Provider of energy storage systems and energy management platform solutions	$7.45M	VHGB, Wellfound & 23 others	68/100
5th	Voltus 2016, San Francisco (United States), Public	Provider of demand response services for energy users and operators	$66.2M	NGP Energy Technology Partners, Activate Capital ... & 4 others	67/100
6th	Corvus Energy 2009, Nesttun (Norway), Acquired	Developer of energy storage systems (ESS) based on lithium NMC technology	$88.3M	Morgan Stanley, Equinor & 11 others	66/100
7th	Farasis Energy 2002, Nanchang (China), Public	Manufacturer of lithium-ion batteries for electric vehicles and energy storage	$793M	Mercedes-Benz, China Venture Capital & 15 others	66/100
8th	Sonnen 2010, Wildpoldsried (Germany), Acquired	Developer of energy storage systems and smart energy solutions hardware	$180M	Shell, SET Ventures & 9 others	65/100
9th	Base Power 2023, Austin (United States), Series D	Provider of battery storage system	$2.5B	Addition, Valor Equity Partners & 25 others	65/100
10th	Microvast 2006, Stafford (United States), Public	Manufacturer of lithium-ion battery solutions for transportation, heavy equipment, and storage	$430M	IFC, Ashmore & 7 others	65/100
18th	Polarium 2015, Stockholm (Sweden), Series D	Manufacturer of lithium ion battery energy storage and management systems	$274M	Alecta, AMF & 7 others	62/100