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JM

Jesper Mårtensson

SE·Finansinspektionen
K-Fast Holding ABK-Fast-B (K-Fast Holding AB)
Insider activity · 24 months2 buys1 saleCumulative net flow
Total declarations
20
Companies
2
▲ Purchases (13 ops.)
€528k
▼ Sales (6 ops.)
€1.4M

Latest filing published 04 Aug 2025 for K-Fast-B (K-Fast Holding AB), €36k.

Filing timeline

BuySale
Jesper Mårtensson

Insider track record

Disclosed buys
13
Disclosed sells
6
Signal history

Closed purchases

Market purchases
13

Not enough history yet: 0 closed purchases, at least 2 are needed.

Purchases by company

Jesper Mårtensson: trading record in brief

Jesper Mårtensson discloses dealings in 2 companies, chiefly K-Fast-B (K-Fast Holding AB) and K-Fast Holding AB. In total, 20 filings cover trades dated from 29 November 2019 to 4 August 2025.

The open-market side counts 13 purchases for €528k alongside 6 sales for €1.4M. On balance, insiders were net sellers of €845k. Unlike grants, an open-market purchase is paid for by the insider, at the market price. In 2025 alone, the filings show no purchases and 1 sale.

The median purchase comes to €34k. Clusters matter here: 5 out of 11 purchases overlapped with buying by a colleague within 30 days. Purchases made close together by different insiders form what is called a cluster.

Most recently, on 4 August 2025, the filings show an open-market sale worth €36k in K-Fast-B (K-Fast Holding AB). The last insider purchase was made public on 16 December 2024, 692 days ago. Publication is fast: at least half of the trades appear on Finansinspektionen on the same day. The legal deadline for notifying a trade is three business days (MAR article 19). Source: insider filings from Finansinspektionen. Past trades are no guide to future returns.

Companies and markets linked to Jesper Mårtensson

Open company profiles for insider transactions, fundamentals and analyst consensus when available.

Declarations20 total
  • ▼
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    403,248 SEK19FI-SE
    25,000 shares@ SEK 16.12992.1% of flowAktieISIN SE0013382355FI:csv-060a8c9bdf26f10521f9
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    897,000 SEK7FI-SE
    50,000 shares@ SEK 17.944.6% of flowAktieISIN SE0013382355FI:csv-aae90715aaae4282259f
    Canonical exit: 16 Mar 2025 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    883,500 SEK7FI-SE
    50,000 shares@ SEK 17.674.5% of flowAktieISIN SE0013382355FI:csv-849a59488b267c9bd4f9
    Canonical exit: 12 Mar 2025 (T+90)
  • ▼
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    461,693 SEK7FI-SE
    25,000 shares@ SEK 18.46772.3% of flowAktieISIN SE0013382355FI:csv-d544f3c2bee3536054a8
  • ▼
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    763,612 SEK19FI-SE
    44,034 shares@ SEK 17.34144.0% of flowAktieISIN SE0013382355FI:csv-dd0a3d9f2341e3f5bd49
  • ▼
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    946,914 SEK19FI-SE
    52,289 shares@ SEK 18.10925.0% of flowAktieISIN SE0013382355FI:csv-9497b70ef29c20e8e7bd
  • ▼
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    1M SEK20FI-SE
    53,677 shares@ SEK 19.61035.5% of flowAktieISIN SE0013382355FI:csv-ebb4c7f568bcf87b4bf1
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    310,933 SEK25FI-SE
    25,000 shares@ SEK 12.43731.6% of flowAktieISIN SE0013382355FI:csv-da81ea6cab2e49bfa5ba
    Canonical exit: 2 Jan 2024 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    315,045 SEK22FI-SE
    25,000 shares@ SEK 12.60181.6% of flowAktieISIN SE0013382355FI:csv-9f784a1c05e24cf6daa7
    Canonical exit: 1 Jan 2024 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    519,904 SEK22FI-SE
    40,000 shares@ SEK 12.99762.6% of flowAktieISIN SE0013382355FI:csv-dbc20b399a3798865c5e
    Canonical exit: 31 Dec 2023 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    201,700 SEK7FI-SE
    10,000 shares@ SEK 20.171.0% of flowAktieISIN SE0013382355FI:csv-48b520728255dabe43aa
    Canonical exit: 31 Jul 2023 (T+90)
  • ▼
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    11M SEK13FI-SE
    125,000 shares@ SEK 84.0062.0% of flowAktieISIN SE0013382355FI:csv-6bec344cc273a9b2a845
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    132,000 SEK19FI-SE
    2,000 shares@ SEK 66.000.8% of flowAktieISIN SE0013382355FI:csv-58e726c03abbc5b8135b
    Canonical exit: 9 Sept 2021 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast-B (K-Fast Holding AB)
    761,790 SEK15FI-SE
    3,000 shares@ SEK 253.93100.0% of flowAktieISIN SE0013382355FI:csv-3b2e2138f8393957e2ac
    Canonical exit: 22 Apr 2021 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast Holding AB
    235,470 SEK0FI-SE
    1,000 shares@ SEK 235.47AktieISIN SE0013382355FI:csv-e71a855e9d7933fb43f9
    Canonical exit: 6 Jan 2021 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast Holding AB
    348,480 SEK0FI-SE
    1,500 shares@ SEK 232.32AktieISIN SE0013382355FI:csv-e79beff17a5a997dae3a
    Canonical exit: 9 Dec 2020 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast Holding AB
    244,115 SEK7FI-SE
    1,500 shares@ SEK 162.74333.4% of flowAktieISIN SE0013382355FI:csv-a47a937dc4335d86a60f
    Canonical exit: 9 Apr 2020 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast Holding AB
    565,232 SEK8FI-SE
    3,500 shares@ SEK 161.49487.9% of flowAktieISIN SE0013382355FI:csv-cafce5bd04a386cd6c9d
    Canonical exit: 29 Mar 2020 (T+90)
  • ▲
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast Holding AB
    369,385 SEK23FI-SE
    2,500 shares@ SEK 147.75385.1% of flowAktieISIN SE0013382355FI:csv-71961e2ec332a9cba2d1
    Canonical exit: 11 Mar 2020 (T+90)
  • ●
    Jesper Mårtensson
    StyrelseledamotExecutivesK-Fast Holding AB
    6M SEK15FI-SE
    57,500 shares@ SEK 105.0083.6% of flowAktieISIN SE0013382355FI:csv-5e4b4cf232f0c136a91e

20 of 20 declarations

Related entities

No related entities found.