Position in CSTL
as of Jun 30, 2026
· filed Aug 7, 2026
Position Value
$78,513,308
+$5,281,992 QoQ
Shares Held
3,291,963
+10.4% QoQ
Ownership
10.8%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#1
of 176 holders
Holding Since
Sep 2024
8 quarters on record
Voting authority
Sole 96%
Shared 0%
None 4%
Common Shares in CSTL Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Jun 30, 2026BlackRock, Inc. holds $59,796,815,474 across 40 Diagnostics & Research names. CSTL ranks #26 (0.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | TMO |
Thermo Fisher Scientific Inc.
|
30,919,632 | $15,501,866,689 | |
| 2 | DHR |
Danaher Corp /De/
|
55,084,630 | $10,492,520,314 | |
| 3 | IDXX |
Idexx Laboratories Inc /De
|
8,170,178 | $4,301,108,497 | |
| 4 | A |
Agilent Technologies, Inc.
|
25,599,001 | $3,400,315,293 | |
| 5 | ILMN |
Illumina, Inc.
|
19,191,398 | $3,374,423,500 | |
| 6 | WAT |
Waters Corp /De/
|
8,484,939 | $3,182,191,513 | |
| 7 | NTRA |
Natera, Inc.
|
10,914,608 | $2,962,770,335 | |
| 8 | IQV |
Iqvia Holdings Inc.
|
14,549,693 | $2,811,291,673 |
All Filings in CSTL
Export CSV
8 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $78,513,308 | 3,291,963 | Shares | Sole | 2026-08-07 | |
| 2026-03-31 | $73,231,316 | 2,982,946 | Shares | Sole | 2026-05-13 | |
| 2025-12-31 | $120,794,064 | 3,105,246 | Shares | Sole | 2026-02-12 | |
| 2025-09-30 | $72,633,926 | 3,189,896 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $64,418,539 | 3,154,679 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $59,730,464 | 2,983,540 | Shares | Sole | 2025-05-02 | |
| 2024-12-31 | $77,852,878 | 2,921,309 | Shares | Sole | 2025-02-07 | |
| 2024-09-30 | $88,990,149 | 3,120,272 | Shares | Sole | 2024-11-13 | |
| No filing history on record for this holder in this stock. | ||||||