Position in CSTL
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$9,486,733
-$2,377,767 QoQ
Shares Held
386,425
+26.7% QoQ
Ownership
1.27%
of shares outstanding
% of Portfolio
0.16%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2025
2 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, 2026EVENTIDE ASSET MANAGEMENT, LLC holds $321,842,111 across 6 Diagnostics & Research names. CSTL ranks #4 (2.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | GH |
Guardant Health, Inc.
|
2,362,379 | $218,212,948 | |
| 2 | MTD |
Mettler Toledo International Inc/
|
50,751 | $64,007,161 | |
| 3 | WGS |
GeneDx Holdings Corp.
|
459,015 | $29,477,943 | |
| 4 | CSTL |
Castle Biosciences Inc
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|
386,425 | $9,486,733 | |
| 5 | IDXX |
Idexx Laboratories Inc /De
|
782 | $439,397 | |
| 6 | DGX |
Quest Diagnostics Inc
|
1,112 | $217,929 |
All Filings in CSTL
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2 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $9,486,733 | 386,425 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $11,864,500 | 305,000 | Shares | Sole | 2026-02-13 | |
| No filing history on record for this holder in this stock. | ||||||