Casdin Capital, LLC
Director · Ten-percent owner · WGS, TSVT
As of 2026-09-16, Casdin Capital, LLC has 33 Form 4 transactions on record across 2 companies — 20 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
- Direct $0
- Indirect $361.2M
| WGS | indirect | 3,707,164 sh | $361.2M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-06-05 | WGS | Purchase | 50,000 @ $52.86 | $2.6M | +1.4% of holding | 3,707,164 | Form 4 |
| 2026-06-04 | WGS | Purchase | 150,000 @ $56.44 | $8.5M | +4.3% of holding | 3,657,164 | Form 4 |
| 2026-05-20 | WGS | Purchase | 140,000 @ $43.81 | $6.1M | +4.2% of holding | 3,507,164 | Form 4 |
| 2026-05-19 | WGS | Purchase | 185,000 @ $42.60 | $7.9M | +5.8% of holding | 3,367,164 | Form 4 |
| 2026-05-18 | WGS | Purchase | 175,000 @ $42.55 | $7.4M | +5.8% of holding | 3,182,164 | Form 4 |
| 2026-05-11 | WGS | Purchase | 50,000 | — | +6.3% of holding | 850,000 | Form 4 |
| 2026-05-11 | WGS | Purchase | 50,000 | — | +6.3% of holding | 850,000 | Form 4 |
| 2026-05-11 | WGS | Purchase | 50,000 | — | +6.3% of holding | 850,000 | Form 4 |
| 2026-05-11 | WGS | Purchase | 50,000 | — | +6.3% of holding | 850,000 | Form 4 |
| 2026-05-11 | WGS | Purchase | 50,000 | — | +6.3% of holding | 850,000 | Form 4 |
| 2026-05-08 | WGS | Purchase | 300,000 | — | +60.0% of holding | 800,000 | Form 4 |
| 2026-05-08 | WGS | Purchase | 300,000 | — | +60.0% of holding | 800,000 | Form 4 |
| 2026-05-08 | WGS | Purchase | 300,000 | — | +60.0% of holding | 800,000 | Form 4 |
| 2026-05-08 | WGS | Purchase | 300,000 | — | +60.0% of holding | 800,000 | Form 4 |
| 2026-05-08 | WGS | Purchase | 300,000 | — | +60.0% of holding | 800,000 | Form 4 |
| 2026-05-07 | WGS | Purchase | 500,000 | — | ownership Δ n/a | 500,000 | Form 4 |
| 2026-05-07 | WGS | Purchase | 500,000 | — | ownership Δ n/a | 500,000 | Form 4 |
| 2026-05-07 | WGS | Purchase | 500,000 | — | ownership Δ n/a | 500,000 | Form 4 |
| 2026-05-07 | WGS | Purchase | 500,000 | — | ownership Δ n/a | 500,000 | Form 4 |
| 2026-05-07 | WGS | Purchase | 500,000 | — | ownership Δ n/a | 500,000 | Form 4 |
| 2025-08-22 | WGS | Sale | 500,000 @ $120.90 | $60.5M | −14.3% of holding | 3,007,164 | Form 4 |
12 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2025-05-13 | TSVT | Code U | 2,000,000 | 0 | Form 4 |
| 2025-05-13 | TSVT | Code U | 22,625 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 12,050 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 33,400 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 12,050 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 33,400 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 12,050 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 33,400 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 12,050 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 33,400 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 12,050 | 0 | Form 4 |
| 2025-05-13 | TSVT | Disposition | 33,400 | 0 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.