Werner Soderstrom Corporation

What Werner Soderstrom Corporation does

Werner Soderstrom Corporation (WSOY, legal entity Werner Söderström Osakeyhtiö) is a privately held Finnish book publisher founded in 1890, headquartered at Lönnrotinkatu 18 A, Helsinki. The company publishes Finnish-language literature across fiction (novels, crime/thrillers, historical fiction, literary fiction), children's and young adult books, non-fiction, poetry, and graphic novels, plus a select catalog of translated international authors. WSOY's roster includes multiple Finlandia Prize, Topelius, Runeberg, and Anni Polva winners and nominees, and individual titles have demonstrated strong commercial reach (e.g., Satu Rämö's Hildur series at over 1 million copies in Finland; Salla Simukka's Lumikki trilogy sold to 50+ countries).

WSOY's business model is traditional book publishing revenue: it earns one-time per-unit revenue on physical books (hardcover €20-35, paperback €15-25), ebooks (€10-20), and audiobooks (€15-30) sold direct via wsoy.fi, on the shared kirja.fi marketplace, and through Finnish physical bookstores, libraries, and the Bookbeat audio platform. A secondary revenue stream comes from rights and licensing (translation rights, royalties, adaptations), evidenced by the export of Finnish titles internationally. The company operates with 11-50 employees and is not publicly listed; no revenue, funding, or ownership figures are publicly disclosed. Recent commercial activity includes taking over the Pikkuli children's brand for Fall 2026, an associated €3.5M feature film co-production, and a cross-publisher UNICEF charity anthology with Tammi and Otava.

Name

Werner Soderstrom Corporation

Legal name

Werner Söderström Osakeyhtiö

Website

https://wsoy.fi

Company type

Private

Founded year

1890

Operating status

Operating

Headcount range

11–50 employees

Short description

Werner Soderstrom Corporation (WSOY) is a privately held Finnish book publisher founded in 1890, publishing Finnish-language and translated fiction, children's, YA, and non-fiction titles across print, ebook, and audiobook formats to Finnish consumers via kirja.fi, Bookbeat, and retail.

Ownership category

akta.pro rank

Product category

Book Publishing

NAICS

Book Publishers (51313), Book Publishers (513130)

SIC

Books: Publishing Or Publishing & Printing (2731)

akta.pro primary industry

Trade Book Print-on-Demand (Fiction & Nonfiction) (MPAJANAA)

akta.pro secondary industries

Children’s Book Print-on-Demand (Picture Books, Early Readers, YA) (MPAJANAC), Children’s Nonfiction Educational (Science, History, Nature) (EDAGAIAC)

Keywords

• Finnish book publishing
• Children's literature
• Literary fiction publishing
• Translated fiction rights
• Audiobook distribution

Headquarters

HQ city

Helsinki

HQ country

Finland

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Marketing or Sales, Others

Revenue model

1. Book Sales: Sales of physical books (hardcover and paperback), ebooks, and audiobooks through retail and digital channels. WSOY publishes Finnish-language literature including novels, children's books, non-fiction, and translated works.
2. Rights and Licensing: Publishing rights for authors, including royalties and licensing fees for translations and adaptations.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels4 records

Core offering

Werner Söderström Osakeyhtiö (WSOY) is a traditional Finnish book publishing house founded in 1890 that publishes Finnish-language literature across multiple genres including adult fiction, children's books, young adult fiction, non-fiction, poetry, and graphic novels. The company releases titles in hardcover, paperback, ebook, and audiobook formats and represents a roster of established Finnish and translated international authors, distributing through its own website, the kirja.fi online bookstore, the Bookbeat audiobook platform, physical bookstores, and libraries across Finland.

Product overview

WSOY (Werner Söderström Osakeyhtiö) is a traditional Finnish book publishing house with over 100 years of history, publishing Finnish-language literature across multiple genres and formats. The company publishes fiction (novels, crime/thrillers, literary fiction), children's and young adult books, non-fiction, and graphic novels. Key product lines include recurring series like the Lätkä-Lauri children's hockey books, Lemuetsivät mystery adventures, Osasto K thriller series, Salla Kotka crime series, Kylmä meri historical fiction, and various illustrated children's series. WSOY also publishes translated international authors such as Valérie Perrin. Books are available in multiple formats including hardcover, paperback, e-books (epub2/epub3), and audiobooks.

Differentiator

Problem solved

Functional benefit

Products and services

• Lätkä-Lauri Series Children's sports fiction book series by Roope Lipasti featuring ice hockey-themed stories aimed at elementary school readers.
• Lemuetsivät Series Children's mystery book series by Roope Lipasti featuring audio-drama adaptations and humorous investigative adventures for young readers.
• Aavepartio Series Children's ghost story series by Roope Lipasti and Mari Luoma with easy-to-read spooky humor books for early readers.
• Osasto K Series Thriller book series by Tuomas Niskakangas featuring investigative journalism and conspiracy themes for adult readers.
• Salla Kotka Series Legal thriller and crime book series by Vera Vala featuring a forensic psychologist protagonist set in Milan.
• Kylmä meri Series Historical fiction book series by Ulla Rask set in the Baltic Sea region during the 1600s for adult readers.
• Freya & Eldi Series Graphic novel series for young readers by Mari Luoma featuring pirate adventures.
• Hopeasiipi Series Historical fantasy book duology for children by Anniina Mikama set in mythical lands.
• Painajaispuoti Series Children's fantasy and horror book series by Magdalena Hai featuring nightmare-themed stories.
• Kivikauden sankarit Series Children's prehistoric adventure book series combining humor and history.
• Etsivätoimisto Aino Tylli Series Cosy crime book series by Terhi Rannela set in 1930s Helsinki.
• Sang Series Dystopian fantasy book series for young adults by Elina Pitkäkangas.
• Pikkuli Books Children's picture books about the small bird Pikkuli and friends from Aurinkonummi forest, transitioning to WSOY in 2026.
• Valérie Perrin Translations Finnish translations of French bestselling author Valérie Perrin's literary fiction works.
• WSOY Publishing House Traditional book publishing house publishing Finnish-language literature across fiction, non-fiction, children's books, poetry, and comics in hardcover, paperback, ebook, and audiobook formats.

Named customers10 records

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Eight partnerships are on record, tiered core, major and minor.

• Kirja.ficoreChannel Partner/ Reseller/ Distributor · 17 April 2026Kirja.fi is a joint online bookstore platform operated by major Finnish publishers. WSOY distributes books through this platform, which serves as a primary consumer-facing channel for Finnish books.
• Pikkuli Group OycoreStrategic or Co-development Partner · 17 April 2026Pikkuli children's books are moving to WSOY publishing in 2026. The Pikkuli brand includes books, TV animation series, music, mobile games, and live performances. First new books under WSOY publishing will appear in Fall 2026.
• AittoFlow OymajorStrategic or Co-development Partner · 17 April 2026AittoFlow Oy is co-producing the Pikkuli movie 'Pikkuli ja Tähtipeura' with Filmkompaniet. The movie is one of Finland's largest children's film projects at 3.5 million euros budget.
• BookbeatcoreChannel Partner/ Reseller/ DistributorBookbeat is a digital audiobook platform through which WSOY makes audiobooks available to consumers. Multiple WSOY titles are available on Bookbeat.
• FilmkompanietmajorStrategic or Co-development PartnerFilmkompaniet is co-producing the Pikkuli animated feature film 'Pikkuli ja Tähtipeura' with AittoFlow Oy.
• OtavaminorChannel Partner/ Reseller/ DistributorJoint publication of 'Pieniä tarinoita nuorille' anthology - WSOY and Tammi publishing e-book and audio book while Otava publishes the printed book. Proceeds support UNICEF work in Ukraine.
• TammiminorChannel Partner/ Reseller/ DistributorJoint publication of 'Pieniä tarinoita nuorille' anthology with WSOY publishing e-book and audio book formats.
• UNICEFminorOthersUNICEF partnership for 'Pieniä tarinoita nuorille' anthology - proceeds from book sales directed to UNICEF's work in Ukraine.

Scale indicators3 records

Recent moves6 records

Expansion highlights4 records

Direct peers

• S&S (Schildts & Söderströms): Finnish-Swedish publisher serving both Finland's Swedish-speaking minority and broader Finnish market. Overlaps with WSOY on children's books, fiction, and educational content.
• Otava: One of Finland's largest publishing houses, publishing fiction, non-fiction, children's books, and educational materials. Otava is a direct competitor in the Finnish trade market and a co-publication partner with WSOY on charity anthologies.
• Gummerus: Established Finnish trade publisher of general fiction, crime, and non-fiction, founded in 1872. Comparable in heritage, focus on Finnish-language literature, and target readership to WSOY.
• Atena Kustannus: Finnish publisher of general fiction, non-fiction, and topical books. Comparable to WSOY in scale and audience within the Finnish trade publishing landscape.
• Like Kustannus: Finnish independent publisher of literary fiction, poetry, and non-fiction. Competes with WSOY for Finnish literary authors and readers in the adult trade segment.
• Tammi (Bonnier Books Finland): Major Finnish trade publisher of fiction, children's books, and non-fiction, part of Bonnier Group. WSOY and Tammi jointly produce anthologies (e.g., 'Pieniä tarinoita nuorille' for UNICEF Ukraine) and compete directly in the Finnish-language trade market.
• Teos: Finnish literary publisher focused on quality fiction, poetry, and translated works. A direct competitor in the literary Finnish-language trade market where WSOY also operates.
• Minerva Kustannus: Finnish publisher of fiction, non-fiction, and translated works, now part of Bonnier Books Finland. Competes with WSOY across multiple genres in the Finnish trade market.

Broad incumbents

• Bonnier Books: Major Nordic publishing group with deep Finnish presence via Tammi and Minerva. Broader incumbent with overlapping children's, fiction, and non-fiction lists versus WSOY.

Others

• Storytel: Operator of the Bookbeat audiobook platform through which WSOY distributes audiobooks. Not a publisher but a key distribution and digital-format partner; representative of the audiobook/digital ecosystem adjacent to traditional publishers like WSOY.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/wsoykirjat
• Facebookfacebook.com/WSOYkirjat

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Werner Soderstrom Corporation