Position in CSTL
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$8,673,981
-$3,342,773 QoQ
Shares Held
353,319
+14.4% QoQ
Ownership
1.16%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
24 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 Jun 30, 2024CallValue
$10,014,200
CallShares
460,000
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 Mar 31, 2026MILLENNIUM MANAGEMENT LLC holds $788,320,547 across 32 Diagnostics & Research names. CSTL ranks #19 (1.1% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | CRL |
Charles River Laboratories International, Inc.
|
934,045 | $161,122,762 | |
| 2 | GH |
Guardant Health, Inc.
|
921,395 | $85,109,256 | |
| 3 | A |
Agilent Technologies, Inc.
|
686,546 | $78,252,513 | |
| 4 | WAT |
Waters Corp /De/
|
185,168 | $55,143,030 | |
| 5 | IQV |
Iqvia Holdings Inc.
|
268,185 | $45,736,269 | |
| 6 | IDXX |
Idexx Laboratories Inc /De
|
70,446 | $39,582,902 | |
| 7 | TMO |
Thermo Fisher Scientific Inc.
|
70,696 | $34,749,204 | |
| 8 | DHR |
Danaher Corp /De/
|
182,825 | $34,663,620 |
All Filings in CSTL
Export CSV
27 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $8,673,981 | 353,319 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $12,016,754 | 308,914 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $13,094,776 | 575,089 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $8,747,866 | 428,397 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $5,100,074 | 254,749 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $14,625,759 | 548,809 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $4,008,115 | 140,537 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $10,014,200 | 460,000 | Call | Sole | 2024-08-14 | |
| 2024-06-30 | $758,183 | 34,827 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $5,505,448 | 248,553 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $15,458,833 | 716,350 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $10,051,171 | 595,096 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $137,200 | 10,000 | Put | Sole | 2023-08-14 | |
| 2023-06-30 | $14,208,335 | 1,035,593 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $18,753,928 | 825,437 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $21,500,847 | 913,375 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $25,097,853 | 962,341 | Shares | Sole | 2022-11-14 | |
| 2022-09-30 | $1,304,000 | 50,000 | Call | Sole | 2022-11-14 | |
| 2022-06-30 | $19,800,853 | 902,089 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $12,230,675 | 272,641 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $22,142,612 | 516,506 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $26,823,373 | 403,359 | Shares | Sole | 2021-11-15 | |
| 2021-03-31 | $17,119,792 | 250,070 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $32,452,184 | 483,279 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $18,250,909 | 354,731 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $13,113,406 | 347,928 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $6,243,674 | 209,449 | Shares | Sole | 2020-05-14 | |
| No filing history on record for this holder in this stock. | ||||||