MASON CAPITAL MANAGEMENT LLC: SIGNATURE BANK (SBNY): Quarterly 13F Position History
As of Q1 2026, MASON CAPITAL MANAGEMENT LLC reported 400,000 shares of SIGNATURE BANK (SBNY), worth $260.0K and representing 0.0% of its 13F equity book. The position first appeared in Q1 2024 and has been disclosed across 9 13F-HR filings in Pactolio's tracked window.
- 400,000Shares Held (Latest Filing)
- $260.0KReported Market Value (Latest Filing)
- 0.0%Portfolio Weight (% of 13F Equity Book)
- 0Quarter-over-Quarter Share Change
- -$144.0KQuarter-over-Quarter Value Change
- 400,000Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 9 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 400,000 | 0 | — | $260.0K | 0.0% | $0.7 |
| Q4 2025 | 400,000 | 0 | — | $404.0K | 0.1% | $1.0 |
| Q3 2025 | 400,000 | 0 | — | $260.0K | 0.1% | $0.7 |
| Q2 2025 | 400,000 | 0 | — | $300.0K | 0.1% | $0.8 |
| Q1 2025 | 400,000 | 0 | — | $392.0K | 0.1% | $1.0 |
| Q4 2024 | 400,000 | 0 | — | $548.0K | 0.1% | $1.4 |
| Q3 2024 | 400,000 | 0 | — | $800.0K | 0.2% | $2.0 |
| Q2 2024 | 400,000 | 0 | — | $876.0K | 0.2% | $2.2 |
| Q1 2024 | 400,000 | — | — | $920.0K | 0.1% | $2.3 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did MASON CAPITAL MANAGEMENT LLC first disclose a SBNY position in 13F-HR filings?
MASON CAPITAL MANAGEMENT LLC first reported SIGNATURE BANK (SBNY) on its 13F-HR filing for the period ending 2024-03-31 (Q1 2024). The position has appeared on 9 reported quarters within Pactolio's tracked window.
What was MASON CAPITAL MANAGEMENT LLC's most recent quarter-over-quarter share-count change in SBNY?
MASON CAPITAL MANAGEMENT LLC held the same 400,000 shares of SBNY between Q4 2025 and Q1 2026 — the reported share count was unchanged quarter-over-quarter.
Does the implied price-per-share represent MASON CAPITAL MANAGEMENT LLC's cost basis in SBNY?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.