Overview
Strongbox provides packaging and labeling systems for industry, including wax, wax-resin and resin labels and ribbons, label printers, hand and machine stretch film, packaging robots, and packing tapes. The company selects products with sustainable development, material recyclability, and the reuse of raw materials in mind.
Financials
Revenue history (in k)
Data and insights are generated automatically based on financial statements and may contain errors. This analysis is for informational purposes only and does not constitute an official assessment of the company's credibility or business advice.
Statistics
How the company ranks by revenue within its industry, region and across Poland in 2025.
Results vs industry
Industry
Bank accounts
Registered as a VAT taxpayer on 2022-07-18. Active
07 1090 2138 0000 0001 5098 5891
Debt
No entries in the National Debtors Register (KRZ). No proceedings in KRZ
Public aid
No public aid cases recorded in the last 10 years.
Tenders
No recorded participation in tenders.
Authorized Representatives
Manner of representation
Each member of the management board is authorized to make declarations on behalf of the company independently.
Ownership
| Owner | Shares | Share value | Stake |
|---|---|---|---|
Karina Maria Bożek Sierakowska (45) | 50 | $675.31 | 50% |
Krzysztof Wojciech Sierakowski (46) | 50 | $675.31 | 50% |
Karina Maria Bożek Sierakowska and Krzysztof Wojciech Sierakowski hold a combined 100% – the ownership structure indicates family control.
Beneficial owners
| Person | Rights | |
|---|---|---|
Karina Maria Bożek Sierakowska (45)  | Shareholder of a limited liability company, 2500.0 PLN | |
Krzysztof Wojciech Sierakowski (46) | Shareholder of a limited liability company, 2500.0 PLN |
Competitors
| Name | Revenue | Website | ||
|---|---|---|---|---|
| Westpack.Plsp. z o.o. | $1,274,541.77 | westpack.pl | ||
| RS Packsp. z o.o. | $1,274,241.39 | rspack.com.pl | ||
| Aprodsp. z o.o. | $994,275.26 | aprod.pl | ||
| Meritum Olszowysp. j. | $894,089.40 | meritum-torun.pl | ||
| Serwis Opakowańsp. z o.o. | $661,969.41 | serwis-opakowan.pl | ||
| Znakpaksp. z o.o. | $517,889.43 | znakpak.pl | ||
| Estate Opakowaniasp. z o.o. | $516,913.37 | estate-opakowania.pl | ||
| Prema Polskasp. z o.o. | $489,213.96 | prema.eu | ||
| Sabona Eusp. z o.o. | $369,371.92 | sabona.eu.com | ||
| Packland KielczykS.K.A. | $284,416.38 | pack.land |
FAQ
Last updated: 2026-07-16