ONO
ONESANO
GPW
LISTED
Shareholders
as of September 20, 2026 · source: notifications under Art. 69 of the Offering Act · 2 entities above 5%
FREE FLOAT
The portion of capital not covered by notifications above 5% — its composition is not publicly known.
48.93%
32,235,022 shares
LARGEST STAKE
45.51%
Roman Krzysztof Karkosik
TOP 3 CONCENTRATION
Combined stake of the three largest shareholders above the 5% threshold.
51.07%
2 entities above 5%
LATEST CHANGE
June 30, 2026
ESPI (wykaz z WZ)
Ownership structure
stakes per latest notifications · share count normalized to 65,880,000 shares outstanding
SHAREHOLDERS ≥5% 51.07%
FREE FLOAT 48.93%
HOLDER
STAKE
SHARES
VOTES
NOTIFICATION
Roman Krzysztof Karkosik
45.51%
29,985,129
45.51%
August 16, 2026
Unibax Sp. z o.o.
5.56%
3,659,849
5.56%
August 16, 2026
FREE FLOAT — BELOW 5% THRESHOLD
Tomasz Kaczmarek
—
3,114,988
4.73%
June 30, 2026
Other
44.2%
29,120,034
44.2%
—
Roman Krzysztof Karkosik
45.51%
29,985,129 shares · notification August 16, 2026
Unibax Sp. z o.o.
5.56%
3,659,849 shares · notification August 16, 2026
FREE FLOAT — BELOW 5% THRESHOLD
Tomasz Kaczmarek
4.73%
3,114,988 shares · notification June 30, 2026
Other
44.2%
29,120,034 shares · composition undisclosed
Notification history
crossings above/below the 5% / 10% / 20% thresholdsJune 30, 2026
ESPI (wykaz z WZ) — baseline reading
Boryszew S.A.:
new in the registry, 42.50%
→
Capital and votes
Number of shares
65,880,000
ISIN
PLSKTAN00010
Sector
Biotechnologia
Market
GPW
Country
PL
Listing date
January 01, 1999
Where this data comes from
The structure is built from notifications shareholders file after crossing 5%, 10%, 15%, 20%, 25%, 33%, 50%, 75% and 90% of votes.
Below 5% there is no disclosure obligation, so the remaining capital is shown collectively as free float — its composition is not publicly known.
Stakes are not updated in real time. The date next to each entity is its last notification date, not today's date.