$ Value
$47K
Shares
1,700
Price
$28
Filed
Mar 5
Insider
Name
Stokes Frank
Title
Chief Financial Officer
CIK
0001782815
Roles
Transaction Details
Transaction Date
2026-03-03
Code
S
Table
Non-Derivative
Ownership
Direct
Equity Swap
No
Shares After
52,483
Footnotes
The transaction on this Form 4 was made pursuant to a Rule 10b5-1 plan adopted by Frank Stokes on November 13, 2025. | This transaction was executed in multiple trades at prices ranging from $26.70 to $27.67, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. | Includes 1,033 shares acquired on February 27, 2026, under the Issuer's employee stock purchase plan. | This transaction was executed in multiple trades at prices ranging from $27.72 to $27.97, inclusive. The price reported above reflects the weighted-average sale price. The Reporting Person hereby undertakes to provide upon request to the Securities and Exchange Commission staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. | Reflects the withholding of shares of the Issuer's common stock to satisfy tax withholding obligations in connection with the delivery of vested performance stock units reported on January 12, 2026. | Each Restricted Stock Unit ("RSU") represents the right to receive one share of the Issuer's Common Stock. | The RSU's vest in four equal annual installments beginning on March 03, 2027. | On March 4, 2024, the Reporting Person was granted 48,744 RSUs which vest in four equal installments beginning on March 4, 2025. | On March 4, 2025, the Reporting Person was granted 47,838 RSUs which vest in four equal installments beginning on March 4, 2026. | The shares subject to the option are fully vested.
Filing Info
Stokes Frank's History
| Date | Ticker | Type | Value |
|---|---|---|---|
| 2026-03-05 | CSTL | ▼ | $168K |
| 2026-03-04 | CSTL | M | — |
| 2026-03-04 | CSTL | F | $302K |
| 2026-03-04 | CSTL | M | $13K |
| 2026-03-04 | CSTL | M | $0 |
| 2026-03-04 | CSTL | M | $0 |
| 2026-03-04 | CSTL | M | $0 |
| 2026-03-03 | CSTL | ▼ | $145K |
| 2026-03-03 | CSTL | ▼ | $47K |
| 2026-03-03 | CSTL | F | $100K |
Other Insiders at CSTL (90d)
| Insider | Bought | Sold | Last |
|---|---|---|---|
|
MAETZOLD DEREK J
Pres. & Chief Exec. Officer
|
— | $3.0M | 2026-04-21 |
| Cole G Bradley | — | $211K | 2026-03-05 |
|
Stokes Frank
Chief Financial Officer
|
— | $313K | 2026-03-05 |
|
Juvenal Tobin W
Chief Commercial Officer
|
— | $527K | 2026-03-12 |
|
Oelschlager Kristen M
Chief Operating Officer
|
— | — | 2026-03-04 |
| Cotton Rodney | — | — | 2026-03-26 |