Position in CSTL
as of Mar 31, 2026
· filed Apr 28, 2026
Position Value
$628,823
+$106,319 QoQ
Shares Held
25,614
+90.7% QoQ
Ownership
0.084%
of shares outstanding
% of Portfolio
0.06%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2023
12 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in CSTL Over Time
Shares Held
Position Value (USD)
Position in Diagnostics & Research
Healthcare · as of Mar 31, 2026HARBOR CAPITAL ADVISORS, INC. holds $14,635,869 across 10 Diagnostics & Research names. CSTL ranks #6 (4.3% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | RDNT |
RadNet, Inc.
|
105,191 | $5,879,124 | |
| 2 | VCYT |
Veracyte, Inc.
|
58,277 | $1,877,102 | |
| 3 | NEO |
Neogenomics Inc
|
243,617 | $1,807,638 | |
| 4 | TWST |
Twist Bioscience Corp
|
37,399 | $1,777,200 | |
| 5 | DGX |
Quest Diagnostics Inc
|
4,303 | $843,301 | |
| 6 | CSTL |
Castle Biosciences Inc
This page
|
25,614 | $628,823 | |
| 7 | WGS |
GeneDx Holdings Corp.
|
9,220 | $592,108 | |
| 8 | IQV |
Iqvia Holdings Inc.
|
2,824 | $481,604 |
All Filings in CSTL
Export CSV
12 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $628,823 | 25,614 | Shares | Sole | 2026-04-28 | |
| 2025-12-31 | $522,504 | 13,432 | Shares | Sole | 2026-01-20 | |
| 2025-09-30 | $299,903 | 13,171 | Shares | Sole | 2025-10-15 | |
| 2025-06-30 | $416,547 | 20,399 | Shares | Sole | 2025-07-09 | |
| 2025-03-31 | $332,231 | 16,595 | Shares | Sole | 2025-04-14 | |
| 2024-12-31 | $3,158,025 | 118,500 | Shares | Sole | 2025-01-10 | |
| 2024-09-30 | $4,389,427 | 153,907 | Shares | Sole | 2024-10-29 | |
| 2024-06-30 | $3,019,651 | 138,707 | Shares | Sole | 2024-07-09 | |
| 2024-03-31 | $879,487 | 39,706 | Shares | Sole | 2024-05-13 | |
| 2023-12-31 | $257,924 | 11,952 | Shares | Sole | 2024-01-08 | |
| 2023-09-30 | $164,626 | 9,747 | Shares | Sole | 2023-10-20 | |
| 2023-06-30 | $195,702 | 14,264 | Shares | Sole | 2023-07-11 | |
| No filing history on record for this holder in this stock. | ||||||