Siv Malmgren steps down as CEO of John Mattson

Following 15 years as the CEO for the property company John Mattson, Siv Malmgren has notified the Board of Directors of her intent to step down from her position and retire. Siv Malmgren has been employed at the company since 1996, and assumed the role of CEO in 2006.

John Mattson Fastighetsföretagen AB became a listed company in 2019. The company was previously family-owned by heirs to the master builder John Mattson. Since the beginning in the mid-1960s, the property portfolio has primarily been concentrated to the Stockholm region and has consisted of housing and commercial properties. In 2008, operational focus was shifted to Lidingö and residential properties. The residential portfolio has been developed under the leadership of Siv Malmgren and properties have been upgraded and new builds have led to infill development. Following the listing, John Mattson has expanded through acquisitions, and is now also established in the municipality of Sollentuna and the City of Stockholm.

“The company is now well-established on the stock exchange, and a journey of growth has begun. After 25 wonderful years at the company, 15 of which as CEO, I will be turning 62 this autumn. Now is the right time to hand over the baton,” comments Siv Malmgren, CEO of John Mattson.

“I would like to express my warmest thanks to Siv for all of her work across 25 years of service to the company, and particularly for her time as CEO. Siv has successfully taken the company to the stock exchange and created a forward-looking platform while affirming our master builder tradition. The process will now begin to recruit a successor who can continue with the growth that Siv has begun,” comments Johan Ljungberg, Chairman of the Board, John Mattson.

Siv Malmgren will continue in her role as CEO until a new CEO is appointed. The recruitment process will begin immediately.


Lidingö, 23 February 2021
John Mattson Fastighetsföretagen AB (publ)

For further information, please contact:

Johan Ljungberg, Chairman of the Board, John Mattson
+46 73-960 58 87,
[email protected]

Siv Malmgren, CEO of John Mattson.
+46 70-539 35 07,
[email protected]


This information is information that John Mattson Fastighetsföretagen AB is obliged to disclose pursuant to the EU Market Abuse Regulation. The information was submitted for publication, through the agency of the contact person set out above, at 6.30 p.m. (CET) on 23 February.

About John Mattson Fastighetsföretagen AB (publ)

John Mattson is a private residential property owner with a total of 2,800 rental apartments in Lidingö and Sollentuna as well as leasehold properties with new construction planned in Slakthusområdet in the City of Stockholm. As of 30 September 2020, the total property value was SEK 7.4 billion. The focus of the company’s strategy is on property management, refinement, densification and acquisitions. The management of John Mattson’s properties is characterised by an overall perspective and close customer relationships. The company’s goal is to create great neighbourhoods across generations. John Mattson is listed as JOMA on the NASDAQ Stockholm Mid Cap list.
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