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Marcin Czernik

CIK 1591275 · last filed 2023-06-28

Marcin Czernik is a corporate insider who has filed 16 SEC Form 4 insider transactions across 2 companies since 2013. The most recent filing shows the insider sold $1.0K of ACRV on Jun 28, 2023. Across all open-market trades the lifetime net is +$27.1M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $10.6M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$10.55M

Companies

2

Total Filings

16

Lifetime Open-Market Net

$27.07M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
ACRV 10%+ Owner 3,848,632 $1.60 $6.16M -$1.0K 1 2023-06-28
KPTI 10%+ Owner 593,368 $7.41 $4.40M $27.08M 15 2019-03-04

Recent Filings

16 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2023-06-28 ACRV Sell (S) −80 -$1.0K EDGAR
2019-03-04 KPTI Sell (S) −748,120 -$3.10M EDGAR
2019-02-27 KPTI Sell (S) −7,408,215 -$35.64M EDGAR
2018-08-14 KPTI Sell (S) −3,510 -$64.9K EDGAR
2018-07-18 KPTI Sell (S) −250,000 -$4.63M EDGAR
2016-06-08 KPTI Sell (S) −200,000 -$1.85M EDGAR
2016-06-06 KPTI Sell (S) −89,275 -$861.2K EDGAR
2016-06-01 KPTI Sell (S) −373,320 -$3.59M EDGAR
2016-05-27 KPTI Sell (S) −230,610 -$2.24M EDGAR
2016-05-17 KPTI Sell (S) −52,000 -$416.3K EDGAR
Showing 1–10 of 16
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.