Chescapmanager LLC: MIRION TECHNOLOGIES INC (MIR): Quarterly 13F Position History
As of Q1 2026, Chescapmanager LLC reported 1,659,137 shares of MIRION TECHNOLOGIES INC (MIR), worth $30.8M and representing 4.9% 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.
- 1,659,137Shares Held (Latest Filing)
- $30.8MReported Market Value (Latest Filing)
- 4.9%Portfolio Weight (% of 13F Equity Book)
- 0Quarter-over-Quarter Share Change
- -$8.0MQuarter-over-Quarter Value Change
- 1,659,137Peak 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 | 1,659,137 | 0 | — | $30.8M | 4.9% | $18.6 |
| Q4 2025 | 1,659,137 | 0 | — | $38.9M | 6.4% | $23.4 |
| Q3 2025 | 1,659,137 | +331,242 | +24.9% | $38.6M | 6.2% | $23.3 |
| Q2 2025 | 1,327,895 | 0 | — | $28.6M | 4.8% | $21.5 |
| Q1 2025 | 1,327,895 | 0 | — | $19.3M | 4.0% | $14.5 |
| Q4 2024 | 1,327,895 | +286,494 | +27.5% | $23.2M | 4.2% | $17.4 |
| Q3 2024 | 1,041,401 | +7,595 | +0.7% | $11.5M | 1.9% | $11.1 |
| Q2 2024 | 1,033,806 | +660,645 | +177.0% | $11.1M | 1.8% | $10.7 |
| Q1 2024 | 373,161 | — | — | $4.2M | 0.7% | $11.4 |
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 Chescapmanager LLC first disclose a MIR position in 13F-HR filings?
Chescapmanager LLC first reported MIRION TECHNOLOGIES INC (MIR) 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 Chescapmanager LLC's most recent quarter-over-quarter share-count change in MIR?
Chescapmanager LLC held the same 1,659,137 shares of MIR between Q4 2025 and Q1 2026 — the reported share count was unchanged quarter-over-quarter.
Does the implied price-per-share represent Chescapmanager LLC's cost basis in MIR?
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.