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Flat Capital AB (FLAT-B)

The most recent insider trading activity occurred on October 29, 2025. Significant buy transactions were made by Sebastian Siemiatkowski, Chairman of the Board of Directors, totaling over 4.8 billion. Other executives also made notable buy transactions in June 2025 and November 2024. A few sell transactions were also recorded in June 2025.
Stock chart
Ticker: FLAT-B Exchange: STO


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Purchase Sale Planned purchase Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Sebastian Siemiatkowski
Chairman of the Board of Directors
2 purchases — total 4,801,655,800 SEK
Buy 29 Oct 2025
Value SEK4,532,839.62 | Price 99.93 | Shares 83,974
Through Double Sunday IV AB, a closely affiliated person
Buy 29 Oct 2025
Value SEK3,108,805.36 | Price 130.47 | Shares 8,163
Through Double Sunday IV AB, a closely affiliated person
Buy 23 Oct 2025
Value SEK311,096.11 | Price 451.01 | Shares 20,607
Through Double Sunday IV AB, a closely affiliated person
Buy 23 Oct 2025
Value SEK1,966,990.53 | Price 11.53 | Shares 11,654
Through Double Sunday IV AB, a closely affiliated person
Buy 26 Jun 2025
Value SEK200,000.00 | Price 16.00 | Shares 12,500
Buy 26 Jun 2025
Value SEK42,656.00 | Price 16.00 | Shares 2,666
Buy 19 Jun 2025
Value SEK800,000.00 | Price 16.00 | Shares 50,000
Sale 18 Jun 2025
Value SEK800,000.00 | Price 1.60 | Shares 500,000
Sale 18 Jun 2025
Value SEK7,420,782.40 | Price 1.60 | Shares 4,637,989
Through Nina Siemiatkowski, a closely affiliated person
Buy 27 Nov 2024
Value SEK14,287.50 | Price 12.50 | Shares 1,143
Buy 21 Nov 2024
Value SEK10,712.50 | Price 12.50 | Shares 857
Buy 21 Nov 2024
Value SEK50,000.00 | Price 12.50 | Shares 4,000
Buy 4 Sep 2023
Value SEK14,805.00 | Price 9.00 | Shares 1,645
Buy 29 Aug 2023
Value SEK13,995.00 | Price 9.00 | Shares 1,555
Buy 16 Mar 2022
Value SEK75,000.00 | Price 20.00 | Shares 3,750
Buy 21 Oct 2021
Value SEK1,500,000.00 | Price 10.00 | Shares 150,000
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2025-10-29 2025-10-29 B Purchase

Chairman of the Board of Directors

Through Double Sunday IV AB, a closely affiliated person Director
83,974
99.93
SEK4,532,840
83,974 99.93 SEK4,532,840
2025-10-29 2025-10-29 B Purchase

Chairman of the Board of Directors

Through Double Sunday IV AB, a closely affiliated person Director
8,163
130.47
SEK3,108,805
8,163 130.47 SEK3,108,805
2025-10-24 2025-10-23 B Purchase

Chairman of the Board of Directors

Through Double Sunday IV AB, a closely affiliated person Director
20,607
451.01
SEK311,096
20,607 451.01 SEK311,096
2025-10-24 2025-10-23 B Purchase

Chairman of the Board of Directors

Through Double Sunday IV AB, a closely affiliated person Director
105,392,117
20.00
SEK2,107,842,340
105,392,117 20.00 SEK2,107,842,340
2025-06-26 2025-06-26 B Purchase

Chief Executive Officer (CEO)/Managing Directory

Officer
12,500
16.00
SEK200,000
12,500 16.00 SEK200,000
2025-06-26 2025-06-26 B Purchase

Chief Financial Officer (CFO)

Officer
2,666
16.00
SEK42,656
2,666 16.00 SEK42,656
2025-06-23 2025-06-19 B Purchase

Member of the Board of Directors

Director
50,000
16.00
SEK800,000
50,000 16.00 SEK800,000
2025-06-23 2025-06-18 S Sale

Member of the Board of Directors

Director
500,000
1.60
SEK800,000
500,000 1.60 SEK800,000
2025-06-19 2025-06-18 S Sale

Chairman of the Board of Directors

Through Nina Siemiatkowski, a closely affiliated person Director
4,637,989
1.60
SEK7,420,782
4,637,989 1.60 SEK7,420,782
2024-11-27 2024-11-27 B Purchase

Chief Financial Officer (CFO)

Officer
1,143
12.50
SEK14,288
1,143 12.50 SEK14,288
2024-11-21 2024-11-21 B Purchase

Chief Financial Officer (CFO)

Officer
857
12.50
SEK10,712
857 12.50 SEK10,712
2024-11-21 2024-11-21 B Purchase

Chief Executive Officer (CEO)/Managing Directory

Officer
4,000
12.50
SEK50,000
4,000 12.50 SEK50,000
2023-09-05 2023-09-04 B Purchase

Chief Financial Officer (CFO)

Officer
1,645
9.00
SEK14,805
1,645 9.00 SEK14,805
2023-08-31 2023-08-29 B Purchase

Chief Financial Officer (CFO)

Officer
1,555
9.00
SEK13,995
1,555 9.00 SEK13,995
2022-03-17 2022-03-16 B Purchase

Chief Executive Officer (CEO)/Managing Directory

Officer
3,750
20.00
SEK75,000
3,750 20.00 SEK75,000
2021-10-21 2021-10-21 B Purchase

Member of the Board of Directors

Director
150,000
10.00
SEK1,500,000
150,000 10.00 SEK1,500,000