Position in CSTL
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$2,969,984
-$11,281,263 QoQ
Shares Held
120,977
-67.0% QoQ
Ownership
0.399%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 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 Mar 31, 2026CallValue
$797,875
CallShares
32,500
PutValue
$306,875
PutShares
12,500
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, 2026CITADEL ADVISORS LLC holds $1,652,977,225 across 34 Diagnostics & Research names. CSTL ranks #20 (0.2% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | TMO |
Thermo Fisher Scientific Inc.
|
864,489 | $424,922,277 | |
| 2 | CRL |
Charles River Laboratories International, Inc.
|
1,212,152 | $209,096,220 | |
| 3 | A |
Agilent Technologies, Inc.
|
1,801,714 | $205,359,361 | |
| 4 | DHR |
Danaher Corp /De/
|
1,026,347 | $194,595,390 | |
| 5 | MTD |
Mettler Toledo International Inc/
|
58,054 | $73,217,704 | |
| 6 | GH |
Guardant Health, Inc.
|
775,941 | $71,673,669 | |
| 7 | DGX |
Quest Diagnostics Inc
|
347,218 | $68,047,783 | |
| 8 | IQV |
Iqvia Holdings Inc.
|
390,042 | $66,517,762 |
All Filings in CSTL
Export CSV
50 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $306,875 | 12,500 | Put | Defined | 2026-05-15 | |
| 2026-03-31 | $797,875 | 32,500 | Call | Defined | 2026-05-15 | |
| 2026-03-31 | $2,969,984 | 120,977 | Shares | Defined | 2026-05-15 | |
| 2025-12-31 | $14,251,247 | 366,356 | Shares | Defined | 2026-02-17 | |
| 2025-12-31 | $1,579,340 | 40,600 | Call | Defined | 2026-02-17 | |
| 2025-09-30 | $5,713,334 | 250,915 | Shares | Defined | 2025-11-14 | |
| 2025-09-30 | $211,761 | 9,300 | Put | Defined | 2025-11-14 | |
| 2025-09-30 | $553,311 | 24,300 | Call | Defined | 2025-11-14 | |
| 2025-06-30 | $18,143,475 | 888,515 | Shares | Defined | 2025-08-14 | |
| 2025-03-31 | $190,190 | 9,500 | Call | Defined | 2025-05-15 | |
| 2025-03-31 | $5,172,807 | 258,382 | Shares | Defined | 2025-05-15 | |
| 2025-03-31 | $100,100 | 5,000 | Put | Defined | 2025-05-15 | |
| 2024-12-31 | $1,097,980 | 41,200 | Call | Defined | 2025-02-14 | |
| 2024-12-31 | $22,239,744 | 834,512 | Shares | Defined | 2025-02-14 | |
| 2024-12-31 | $221,195 | 8,300 | Put | Defined | 2025-02-14 | |
| 2024-09-30 | $1,597,120 | 56,000 | Call | Defined | 2024-11-14 | |
| 2024-09-30 | $168,268 | 5,900 | Put | Defined | 2024-11-14 | |
| 2024-09-30 | $18,053,615 | 633,016 | Shares | Defined | 2024-11-14 | |
| 2024-06-30 | $15,094,991 | 693,385 | Shares | Defined | 2024-08-14 | |
| 2024-06-30 | $2,177 | 100 | Put | Defined | 2024-08-14 | |
| 2024-06-30 | $269,948 | 12,400 | Call | Defined | 2024-08-14 | |
| 2024-03-31 | $804,045 | 36,300 | Call | Defined | 2024-05-15 | |
| 2024-03-31 | $14,525,216 | 655,766 | Shares | Defined | 2024-05-15 | |
| 2023-12-31 | $7,094,402 | 328,749 | Shares | Defined | 2024-02-14 | |
| 2023-12-31 | $75,530 | 3,500 | Put | Defined | 2024-02-14 | |
| 2023-12-31 | $142,428 | 6,600 | Call | Defined | 2024-02-14 | |
| 2023-09-30 | $113,163 | 6,700 | Put | Defined | 2023-11-14 | |
| 2023-09-30 | $839,433 | 49,700 | Call | Defined | 2023-11-14 | |
| 2023-09-30 | $8,749,999 | 518,058 | Shares | Defined | 2023-11-14 | |
| 2023-06-30 | $108,388 | 7,900 | Call | Defined | 2023-08-14 | |
| 2023-06-30 | $15,092 | 1,100 | Put | Defined | 2023-08-14 | |
| 2023-06-30 | $772,202 | 56,283 | Shares | Defined | 2023-08-14 | |
| 2023-03-31 | $290,816 | 12,800 | Call | Defined | 2023-05-15 | |
| 2023-03-31 | $4,544 | 200 | Put | Defined | 2023-05-15 | |
| 2023-03-31 | $15,016,920 | 660,956 | Shares | Defined | 2023-05-15 | |
| 2022-12-31 | $143,594 | 6,100 | Put | Defined | 2023-02-14 | |
| 2022-12-31 | $12,977,954 | 551,315 | Shares | Defined | 2023-02-14 | |
| 2022-12-31 | $546,128 | 23,200 | Call | Defined | 2023-02-14 | |
| 2022-09-30 | $758,928 | 29,100 | Call | Defined | 2022-11-14 | |
| 2022-09-30 | $19,107,642 | 732,655 | Shares | Defined | 2022-11-14 | |
| 2022-06-30 | $13,841,582 | 630,596 | Shares | Defined | 2022-08-15 | |
| 2022-03-31 | $8,389,134 | 187,007 | Shares | Defined | 2022-05-16 | |
| 2021-12-31 | $4,196,372 | 97,886 | Shares | Defined | 2022-02-14 | |
| 2021-09-30 | $15,324,193 | 230,439 | Shares | Defined | 2021-11-15 | |
| 2021-09-30 | $1,170,400 | 17,600 | Call | Defined | 2021-11-15 | |
| 2021-06-30 | $1,121,949 | 15,300 | Call | Defined | 2021-08-16 | |
| 2021-06-30 | $4,400,166 | 60,005 | Shares | Defined | 2021-08-16 | |
| 2021-03-31 | $4,113,898 | 60,092 | Shares | Defined | 2021-05-21 | |
| 2021-03-31 | $328,608 | 4,800 | Put | Defined | 2021-05-21 | |
| 2021-03-31 | $1,848,420 | 27,000 | Call | Defined | 2021-05-21 | |
| No filing history on record for this holder in this stock. | ||||||