Derek J. Maetzold owns 0.61% of Castle Biosciences
184,934 shares as of the October 5, 2026 filing, worth $5.9M at the latest close.
CSTL · $976M market cap · Founder-ledGet an email when Derek J. Maetzold’s stake moves.
Free.
The stake
0.61%
worth $5.9M at the latest close
Stake rank
#2,039
by dollar value of the stake
Last sale
14 days ago
Oct 5, 2026
Last buy
None
no purchases since 2020
Derek J. Maetzold owns 0.61% of CASTLE BIOSCIENCES INC: 184,934 of 30,549,507 shares, worth about $5.9M at the 2026-10-16 close. The stake has moved from 9.61% in 2019 to 0.61% on 2026-10-05, across 182 sales and 0 purchases that moved it since 2016. The last trade that moved it was a planned sale of $515,565 on 2026-10-05.
How the stake is held
as of the Oct 5, 2026 filing
SHARES
OF THE STAKE
COMMON STOCK · stated Oct 5, 2026 · Form 4 ↗
HELD DIRECTLY
21,064
11.4%
HELD INDIRECTLY · 10 VEHICLES
163,870
88.6%
By DJM Grantor Retained Annuity Trust No. 8
40,935
22.1%
By DJM Grantor Retained Annuity Trust No. 7
27,862
15.1%
DJM Grantor Retained Annuity Trust No. 9
23,216
12.6%
By DJM Grantor Retained Annuity Trust No. 6
11,963
6.5%
By The Maetzold 2018 Remainder Trust FBO Emily Carol Kirk
11,256
6.1%
By The Maetzold 2018 Remainder Trust FBO Hannah Elizabeth Maetzold
11,256
6.1%
THE STAKE
184,934
0.61%