Constellation Acquisition Corp I CSTAF Insider Ownership

OTC CSTAF
$13.05 +0.00 (+0.00%)
At close: Oct 1, 2026 · 4:00 PM EDT

Insider Holdings by Owner

7.88Mn Shares

Insider Ownership Statistics

as of 31 Dec, 2025
Insider Ownership
48.52%
▼-2.14% pp QoQ
Shares Held by Insiders
7.63Mn
filed for Dec 2025
▼-3.17% QoQ
Shares Outstanding
15.55Mn
15,546,529 shares
Direct Holdings
7.63Mn
Indirect: 0
Net Shares Traded (QoQ)
-250.00K
net selling in Dec 2025
Insiders Holding Shares
2
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —
Form 4 Holdings

Insiders Holding CSTAF

Insiders 2
Shares held 7.88Mn
Of outstanding 50.71%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Sponsor Lp Constellation TenPercentOwner 7,633,750 0 7,633,750 96.8% 01 Feb, 2024
2 Creek Asset Management, L.P. Owl TenPercentOwner 0 250,000 250,000 3.2% 10 Oct, 2023

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

12 Insider Transactions

Source SEC Form 4
Latest quarter Dec 2025
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
30 Jan, 2024 Sponsor Lp Constellation TenPercentOwner Acquired C 7,600,000 — — 7,600,000 Direct
30 Jan, 2024 Sponsor Lp Constellation TenPercentOwner Disposed C 7,600,000 $0.00 $0 33,750 Direct
06 Oct, 2023 Creek Asset Management, L.P. Owl TenPercentOwner Disposed S 250,000 $10.88 $2.72Mn 250,000 Indirect
26 Jan, 2023 Martin Weckwerth Director Disposed S 1,455,511 — — 0 Direct
26 Jan, 2023 Thomas Stapp Chief Financial Officer Disposed S 204,198 — — 0 Direct
26 Jan, 2023 Klaus Kleinfeld Chief Executive Officer Disposed S 1,530,511 — — 0 Indirect
26 Jan, 2023 Sponsor Gmbh Co. Kg Constellation TenPercentOwner Disposed S 7,633,750 — — 0 Direct
26 Jan, 2023 Martin Weckwerth Director Disposed S 77,790 — — 0 Direct
26 Jan, 2023 Klaus Kleinfeld Chief Executive Officer Disposed S 77,789 — — 0 Direct
29 Jan, 2021 Thomas Stapp Chief Financial Officer Acquired A 204,198 — — 204,198 Direct
29 Jan, 2021 Martin Weckwerth Chief Financial Officer Acquired A 1,455,511 — — 1,455,511 Direct
29 Jan, 2021 Klaus Kleinfeld Director Acquired A 1,530,511 — — 1,530,511 Indirect