Siemiatkowski Sebastian

Director · Officer · KLAR

As of 2026-09-16, Siemiatkowski Sebastian has 5 Form 4 transactions on record across 1 company — 5 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $325.4MIndirect: $354.8M$680.2Mas of 2026-09-16
  • Direct $325.4M
  • Indirect $354.8M
KLARindirect25,344,322 sh$354.8M
KLARdirect23,242,172 sh$325.4M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

KLAR · 5 trades
2026-08-26: Purchase, 692,506 sh ($9.9M)2026-06-01: Award / grant, 1,166,563 sh2026-06-01: Award / grant, 1,166,563 sh2026-03-30: Award / grant, 1,628,701 sh2026-03-30: Award / grant, 1,628,701 sh

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-08-26KLARPurchase692,506 @ $14.37$9.9M+2.8% of holding25,344,322Form 4
4 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-06-01KLARAward / grant1,166,56323,242,172Form 4
2026-06-01KLARAward / grant1,166,56323,242,172Form 4
2026-03-30KLARAward / grant1,628,70122,075,609Form 4
2026-03-30KLARAward / grant1,628,70122,075,609Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.