Form 13-F position report

CHURCHILL CAPITAL CORP IX

Reported by BCK Capital Management LP

CCIX CUSIP G21301109 Manager CIK 0001819275

Reported 136,885 shares, up 6,921 (5.3%) from the prior quarter.

Reported value 4.9%; share count 5.3% vs. the prior quarter.

Added
% of reported 13F value 1.53% This manager · Q3 2025
Shares 136,885 Quarter-end amount reported
Reported value $1,434,555 Fair value at quarter end
Consecutive quarters held 2 Through Q3 2025

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Reported position value by quarter
Date Holding Value
2025-06-30 1367221
2025-09-30 1434555
2025-12-31 4039400
2026-03-31 0

Quarterly position history

How this manager's reported quarter-end position changed over time.

4 quarters
Quarterly reported position history for CHURCHILL CAPITAL CORP IX held by BCK Capital Management LP.
Quarter Activity Shares Change % of reported 13F Reported value Filed Source filing
Q1 2026 Reduced 0 -380,000 (-100.0%) 0 $0 2026-05-01
Q4 2025 Added 380,000 +243,115 (177.6%) 17.77% $4,039,400 2026-02-11
Q3 2025 Added 136,885 +6,921 (5.3%) 1.53% $1,434,555 2025-11-10
Q2 2025 New 129,964 +129,964 (0.0%) 1.18% $1,367,221 2025-08-07

Who else reported the position

68 managers reported CHURCHILL CAPITAL CORP IX for Q3 2025.

Managers reporting CHURCHILL CAPITAL CORP IX in Q3 2025.
Manager Activity Shares Change % of reported 13F Reported value Tenure
Fort Baker Capital Management LP Added 2,833,119 +270,441 4.7% $29,691,087 6 qtrs
Empyrean Capital Partners LP Unchanged 2,633,582 0 1.11% $27,599,939 4 qtrs
Magnetar Financial LLC Reduced 1,862,982 -119,774 0.12% $19,524,051 2 qtrs
Alberta Investment Management Corp Unchanged 1,500,000 0 0.11% $15,720,000 2 qtrs
TENOR CAPITAL MANAGEMENT Co L P Added 1,437,500 +1,237,500 0.2% $15,065,000 6 qtrs
MMCAP International Inc SPC Unchanged 1,350,000 0 1.65% $14,148,000 5 qtrs
ARISTEIA CAPITAL LLC Unchanged 1,261,602 0 0.31% $13,221,589 6 qtrs
D E Shaw & Co Inc Unchanged 1,230,669 0 < 0.01% $12,897,411 5 qtrs
Linden Advisors LP Unchanged 1,150,000 0 0.08% $12,052,000 4 qtrs
PICTON MAHONEY ASSET MANAGEMENT Unchanged 1,062,500 0 0.1% $11,136,000 4 qtrs
Premium adds each manager's conviction percentile across reporting peers.
Filing details and methodology As reported
Report period
September 30, 2025
Filed
November 10, 2025
Filing type
13F-HR
Position type
CL A SHS

Voting authority reported

Sole
136,885
Shared
0
None
0

“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.