Position in CSTL
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$1,068,312
+$23,416 QoQ
Shares Held
44,793
+5.2% QoQ
Ownership
0.147%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#66
of 176 holders
Holding Since
Jun 2020
17 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in CSTL Over Time
Shares Held
Position Value (USD)
Derivatives in CSTL
reported options exposure · as of Mar 31, 2026CallValue
$559,740
CallShares
22,800
PutValue
$0
PutShares
0
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Diagnostics & Research
Healthcare · as of Jun 30, 2026JANE STREET GROUP, LLC holds $941,973,796 across 32 Diagnostics & Research names. CSTL ranks #20 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | GH |
Guardant Health, Inc.
|
1,783,444 | $267,570,103 | |
| 2 | NTRA |
Natera, Inc.
|
926,986 | $251,630,349 | |
| 3 | ILMN |
Illumina, Inc.
|
372,628 | $65,519,180 | |
| 4 | ICLR |
Icon PLC
|
374,800 | $65,106,507 | |
| 5 | RVTY |
Revvity, Inc.
|
576,014 | $64,087,317 | |
| 6 | IDXX |
Idexx Laboratories Inc /De
|
105,108 | $55,333,055 | |
| 7 | IQV |
Iqvia Holdings Inc.
|
282,508 | $54,586,195 | |
| 8 | DHR |
Danaher Corp /De/
|
189,123 | $36,024,147 |
All Filings in CSTL
Export CSV
21 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $1,068,312 | 44,793 | Shares | Defined | 2026-08-14 | |
| 2026-03-31 | $1,044,896 | 42,562 | Shares | Defined | 2026-05-12 | |
| 2026-03-31 | $559,740 | 22,800 | Call | Defined | 2026-05-12 | |
| 2025-12-31 | $6,560,328 | 168,646 | Shares | Defined | 2026-02-12 | |
| 2025-12-31 | $361,770 | 9,300 | Call | Defined | 2026-02-12 | |
| 2025-09-30 | $407,583 | 17,900 | Call | Defined | 2025-11-14 | |
| 2025-09-30 | $521,068 | 22,884 | Shares | Defined | 2025-11-14 | |
| 2025-03-31 | $614,133 | 30,676 | Shares | Defined | 2025-05-19 | |
| 2024-12-31 | $1,582,556 | 59,383 | Shares | Defined | 2025-02-14 | |
| 2024-09-30 | $316,572 | 11,100 | Call | Defined | 2024-11-15 | |
| 2024-09-30 | $3,829,778 | 134,284 | Shares | Defined | 2024-11-15 | |
| 2024-06-30 | $806,011 | 37,024 | Shares | Defined | 2024-08-15 | |
| 2023-12-31 | $935,513 | 43,351 | Shares | Defined | 2024-02-15 | |
| 2023-09-30 | $351,159 | 20,791 | Shares | Defined | 2023-11-15 | |
| 2023-06-30 | $317,782 | 23,162 | Shares | Defined | 2023-08-14 | |
| 2022-03-31 | $343,627 | 7,660 | Shares | Defined | 2022-05-17 | |
| 2021-09-30 | $1,092,129 | 16,423 | Shares | Defined | 2021-11-16 | |
| 2021-03-31 | $1,246,656 | 18,210 | Shares | Defined | 2021-05-18 | |
| 2020-12-31 | $946,076 | 14,089 | Shares | Defined | 2021-02-17 | |
| 2020-09-30 | $571,712 | 11,112 | Shares | Defined | 2020-11-17 | |
| 2020-06-30 | $254,105 | 6,742 | Shares | Defined | 2020-08-17 | |
| No filing history on record for this holder in this stock. | ||||||