Castellum, SE0021921319

Castellum stock edges higher as SEK 3.0 billion buyback program concludes

Published on 09/17/2026 at 18:25 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

Castellum stock closed at SEK 127.95 on Nasdaq Stockholm on September 16, 2026, as the company completed share buybacks totaling SEK 3.0 billion. The Castellum AB stock now has 9.9 percent of its shares held in treasury, highlighting an active capital management strategy.

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Castellum AB (ISIN SE0021921319) stock closed at SEK 127.95 on Nasdaq Stockholm on September 16, 2026, up 0.04% from the previous session, as the Swedish property company completed parallel share buyback programs totaling SEK 3.0 billion.

Buyback programs reach SEK 3.0 billion

According to Placera on September 17, 2026, Castellum has concluded two parallel share repurchase programs that were announced on July 15, 2026, after buying back a total of 22.60 million of its own shares for an aggregate consideration of SEK 3.0 billion.

As MFN.se reported in a company release dated September 16, 2026, Castellum repurchased 1,799,414 shares between September 10 and September 16, 2026 at a weighted average price of SEK 130.3298 per share, corresponding to a total transaction value of SEK 234.5 million within those days.

Treasury share position and capital structure

According to the same company release on September 16, 2026, Castellum's holding of its own shares now amounts to 47,040,587 shares, equivalent to 9.9 percent of the total 477,526,355 registered shares in the company, indicating a sizeable treasury share position that can support future capital structure measures.

As MarketScreener summarized on September 16, 2026, the buybacks were executed at daily weighted average prices between roughly SEK 127.65 and SEK 131.99, with 761,696 shares repurchased on September 10, 392,718 shares on September 11, 220,000 shares on both September 14 and September 15, and 205,000 shares on September 16.

Share price reaction and market performance

Per recent data for Castellum on Nasdaq Stockholm cited by Zonebourse on September 17, 2026, the stock's last closing price of SEK 127.95 on September 16, 2026 leaves Castellum up 20.25% year to date while showing a decline of 2.63% over the latest five-day period.

As Zonebourse noted on September 17, 2026, Castellum stock gained about 0.1% in early trading as investors digested the news that the SEK 3.0 billion buyback program was completed, reflecting a modest positive response to the capital management move.

Analyst view and potential impact on earnings

According to TipRanks on September 16, 2026, the most recent analyst stance on Castellum stock is a Hold rating with a SEK 135.00 price target, which stands slightly above the latest closing level near SEK 127.95 and suggests limited implied upside in the near term.

The same TipRanks overview explains that increasing the treasury share position through buybacks can support earnings per share over time, as 47,040,587 shares are now held in treasury out of 477,526,355 shares outstanding after the programs, reducing the free-float and potentially amplifying per-share metrics if underlying operating performance improves.

Stock price and market data

Castellum stock's reference price for investors is the Nasdaq Stockholm listing, where the shares closed at SEK 127.95 on September 16, 2026, with a marginal daily gain of 0.04% on moderate trading activity, while the company’s market capitalization was reported around SEK 5.85 billion as of that date in the same Zonebourse data.