Insider at

04

Insider transactions

05
0 buys (P) 0 sells (S) Net: $0 + 22 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

DateTickerCodeSharesPriceValue Owned afterΔ ownA/Dvs now
May 28, 2026 CSTL A 11,766 · · 11,766 Direct · Acquired (price as of 2026-10-05)
May 22, 2026 CSTL M 13,667 · · 36,121 Direct +60.87% Acquired (price as of 2026-10-05)
May 22, 2026 CSTL M 13,667 · · 0 Direct -100.00% Disposed (price as of 2026-10-05)
May 22, 2025 CSTL A 13,667 · · 13,667 Direct · Acquired (price as of 2026-10-05)
May 21, 2025 CSTL M 8,673 · · 22,454 Direct +62.93% Acquired (price as of 2026-10-05)
May 21, 2025 CSTL M 8,673 · · 0 Direct -100.00% Disposed (price as of 2026-10-05)
July 14, 2024 CSTL M 440 · · 13,781 Direct +3.30% Acquired (price as of 2026-10-05)
July 14, 2024 CSTL M 440 · · 0 Direct -100.00% Disposed (price as of 2026-10-05)
May 25, 2024 CSTL M 8,636 · · 13,341 Direct +183.55% Acquired (price as of 2026-10-05)
May 25, 2024 CSTL M 8,636 · · 0 Direct -100.00% Disposed (price as of 2026-10-05)
May 23, 2024 CSTL A 8,673 · · 8,673 Direct · Acquired (price as of 2026-10-05)
July 14, 2023 CSTL M 440 · · 4,705 Direct +10.32% Acquired (price as of 2026-10-05)
July 14, 2023 CSTL M 440 · · 440 Direct -50.00% Disposed (price as of 2026-10-05)
June 2, 2023 CSTL M 3,825 · · 4,265 Direct +869.32% Acquired (price as of 2026-10-05)
June 2, 2023 CSTL M 3,825 · · 0 Direct -100.00% Disposed (price as of 2026-10-05)
May 25, 2023 CSTL A 8,636 · · 8,636 Direct · Acquired (price as of 2026-10-05)
July 14, 2022 CSTL M 440 · · 440 Direct · Acquired (price as of 2026-10-05)
July 14, 2022 CSTL M 440 · · 880 Direct -33.33% Disposed (price as of 2026-10-05)
June 2, 2022 CSTL A 7,647 · · 7,647 Direct · Acquired (price as of 2026-10-05)
June 2, 2022 CSTL A 3,825 · · 3,825 Direct · Acquired (price as of 2026-10-05)
July 14, 2021 CSTL A 5,365 · · 5,365 Direct · Acquired (price as of 2026-10-05)
July 14, 2021 CSTL A 1,320 · · 1,320 Direct · Acquired (price as of 2026-10-05)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.

06
DateTickerSecurityUnderlying Exercise priceExpirationSharesA/D
May 28, 2026 CSTL Restricted Stock Units Common Stock (11,766) · · 11,766 Acquired
May 22, 2026 CSTL Restricted Stock Units Common Stock (13,667) · · 13,667 Disposed
May 22, 2025 CSTL Restricted Stock Units Common Stock (13,667) · · 13,667 Acquired
May 21, 2025 CSTL Restricted Stock Units Common Stock (8,673) · · 8,673 Disposed
July 14, 2024 CSTL Restricted Stock Units Common Stock (440) · · 440 Disposed
May 25, 2024 CSTL Restricted Stock Units Common Stock (8,636) · · 8,636 Disposed
May 23, 2024 CSTL Restricted Stock Units Common Stock (8,673) · · 8,673 Acquired
July 14, 2023 CSTL Restricted Stock Units Common Stock (440) · · 440 Disposed
June 2, 2023 CSTL Restricted Stock Units Common Stock (3,825) · · 3,825 Disposed
May 25, 2023 CSTL Restricted Stock Units Common Stock (8,636) · · 8,636 Acquired
July 14, 2022 CSTL Restricted Stock Units Common Stock (440) · · 440 Disposed
June 2, 2022 CSTL Stock option (right to buy) Common Stock (7,647) $20.77 June 1, 2032 7,647 Acquired
June 2, 2022 CSTL Restricted Stock Units Common Stock (3,825) · · 3,825 Acquired
July 14, 2021 CSTL Stock option (right to buy) Common Stock (5,365) $66.80 July 13, 2031 5,365 Acquired
July 14, 2021 CSTL Restricted Stock Units Common Stock (1,320) · · 1,320 Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).