Insider · CIK 0001534265

Casdin Partners Master Fund, L.P.

CIK 0001534265 Name as filed on the most recent filing

Filed as Casdin Partners Master Fund, L.P. (55)

103 transaction lines · from 55 filings · filed 2018-07-23 to 2026-06-08 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.

How this page attributes a trade

A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.

01

Issuers this insider has filed against

Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-22 05:23 UTC.

No issuer is recorded

The catalog holds no filing linking this CIK to an issuer.

02

Transactions

Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.

2 transactions · Newest transaction date first, id breaking the tie.

Fault

This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-22 05:23 UTC.

Transactions filed by this insider
Direction Date Code Company Value USD Filing
2026-06-05 P, Open-market purchase GeneDx Holdings Corp.WGS 2,642,830, acquired Open Form 4 filing 0000919574-26-003907
2026-06-04 P, Open-market purchase GeneDx Holdings Corp.WGS 8,466,735, acquired Open Form 4 filing 0000919574-26-003907
2026-05-21 S, Open-market sale Biolife Solutions IncBLFS 15,405,000, disposed Open Form 4 filing 0000919574-26-003646
2026-05-20 P, Open-market purchase GeneDx Holdings Corp.WGS 6,132,854, acquired Open Form 4 filing 0000919574-26-003627
2026-05-20 S, Open-market sale Biolife Solutions IncBLFS 5,925,000, disposed Open Form 4 filing 0000919574-26-003646
2026-05-19 P, Open-market purchase GeneDx Holdings Corp.WGS 7,880,334, acquired Open Form 4 filing 0000919574-26-003627
2026-05-19 S, Open-market sale Biolife Solutions IncBLFS 6,795,000, disposed Open Form 4 filing 0000919574-26-003646
2026-05-18 P, Open-market purchase GeneDx Holdings Corp.WGS 7,446,548, acquired Open Form 4 filing 0000919574-26-003627
2025-12-04 P, Open-market purchase Standard Biotools Inc.LAB 217,020, acquired Open Form 4 filing 0000919574-25-007243
2025-12-03 P, Open-market purchase Standard Biotools Inc.LAB 108,038, acquired Open Form 4 filing 0000919574-25-007243
2025-12-02 P, Open-market purchase Standard Biotools Inc.LAB 177,513, acquired Open Form 4 filing 0000919574-25-007243
2025-11-25 P, Open-market purchase Standard Biotools Inc.LAB 9,838,405, acquired Open Form 4 filing 0000919574-25-007187
2025-11-24 P, Open-market purchase Standard Biotools Inc.LAB 214,875, acquired Open Form 4 filing 0000919574-25-007187
2025-11-20 P, Open-market purchase Standard Biotools Inc.LAB 586,260, acquired Open Form 4 filing 0000919574-25-007124
2025-11-19 P, Open-market purchase Standard Biotools Inc.LAB 448,910, acquired Open Form 4 filing 0000919574-25-007124
2025-11-18 P, Open-market purchase Standard Biotools Inc.LAB 339,405, acquired Open Form 4 filing 0000919574-25-007124
2025-11-17 P, Open-market purchase Standard Biotools Inc.LAB 275,580, acquired Open Form 4 filing 0000919574-25-007087
2025-11-14 P, Open-market purchase Standard Biotools Inc.LAB 309,800, acquired Open Form 4 filing 0000919574-25-007087
2025-11-13 P, Open-market purchase Standard Biotools Inc.LAB 541,395, acquired Open Form 4 filing 0000919574-25-007087
2025-11-12 P, Open-market purchase Standard Biotools Inc.LAB 445,838, acquired Open Form 4 filing 0000919574-25-006597
2025-11-11 P, Open-market purchase Standard Biotools Inc.LAB 358,800, acquired Open Form 4 filing 0000919574-25-006597
2025-11-10 P, Open-market purchase Standard Biotools Inc.LAB 321,915, acquired Open Form 4 filing 0000919574-25-006597
2025-11-07 P, Open-market purchase Standard Biotools Inc.LAB 252,765, acquired Open Form 4 filing 0000919574-25-006597
2025-10-15 S, Open-market sale Biolife Solutions IncBLFS 21,410,325, disposed Open Form 4 filing 0000919574-25-006180
2025-09-09 P, Open-market purchase Standard Biotools Inc.LAB 128,920, acquired Open Form 4 filing 0000919574-25-005636
2025-09-04 P, Open-market purchase Standard Biotools Inc.LAB 319,350, acquired Open Form 4 filing 0000919574-25-005603
2025-09-03 P, Open-market purchase Standard Biotools Inc.LAB 316,400, acquired Open Form 4 filing 0000919574-25-005603
2025-08-26 P, Open-market purchase Standard Biotools Inc.LAB 157,938, acquired Open Form 4 filing 0000919574-25-005152
2025-08-25 P, Open-market purchase Standard Biotools Inc.LAB 248,180, acquired Open Form 4 filing 0000919574-25-005152
2025-08-22 S, Open-market sale GeneDx Holdings Corp.WGS 60,451,950, disposed Open Form 4 filing 0000919574-25-005084
2025-08-22 P, Open-market purchase Standard Biotools Inc.LAB 252,680, acquired Open Form 4 filing 0000919574-25-005152
2025-08-15 P, Open-market purchase Standard Biotools Inc.LAB 183,210, acquired Open Form 4 filing 0000919574-25-004979
2025-08-15 S, Open-market sale Biolife Solutions IncBLFS 12,200,000, disposed Open Form 4 filing 0000919574-25-005051
2025-08-14 P, Open-market purchase Standard Biotools Inc.LAB 161,543, acquired Open Form 4 filing 0000919574-25-004979
2025-08-13 P, Open-market purchase Standard Biotools Inc.LAB 98,280, acquired Open Form 4 filing 0000919574-25-004979
2025-08-11 S, Open-market sale Biolife Solutions IncBLFS 11,300,000, disposed Open Form 4 filing 0000919574-25-004702
2025-06-10 S, Open-market sale Biolife Solutions IncBLFS 23,800,000, disposed Open Form 4 filing 0000919574-25-003572
2025-02-28 P, Open-market purchase Standard Biotools Inc.LAB 5,134,321, acquired Open Form 4 filing 0000919574-25-001777
2024-08-27 P, Open-market purchase Standard Biotools Inc.LAB 546,750, acquired Open Form 4 filing 0000919574-24-005134
2024-08-26 P, Open-market purchase Standard Biotools Inc.LAB 322,455, acquired Open Form 4 filing 0000919574-24-004878
2024-08-23 P, Open-market purchase Standard Biotools Inc.LAB 620,975, acquired Open Form 4 filing 0000919574-24-004878
2024-08-22 P, Open-market purchase Standard Biotools Inc.LAB 602,807, acquired Open Form 4 filing 0000919574-24-004878
2024-08-21 P, Open-market purchase Standard Biotools Inc.LAB 951,950, acquired Open Form 4 filing 0000919574-24-004812
2024-08-20 P, Open-market purchase Standard Biotools Inc.LAB 936,700, acquired Open Form 4 filing 0000919574-24-004812
2024-08-19 P, Open-market purchase Standard Biotools Inc.LAB 463,225, acquired Open Form 4 filing 0000919574-24-004812
2024-08-14 P, Open-market purchase Standard Biotools Inc.LAB 1,913,520, acquired Open Form 4 filing 0000919574-24-004802
2024-08-13 P, Open-market purchase Standard Biotools Inc.LAB 890,560, acquired Open Form 4 filing 0000919574-24-004593
2024-08-12 P, Open-market purchase Standard Biotools Inc.LAB 820,600, acquired Open Form 4 filing 0000919574-24-004593
2024-08-09 P, Open-market purchase Standard Biotools Inc.LAB 848,481, acquired Open Form 4 filing 0000919574-24-004593
2024-08-08 P, Open-market purchase Standard Biotools Inc.LAB 932,601, acquired Open Form 4 filing 0000919574-24-004339

This column is intentionally blank

No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.

Codes on this page
P, Open-market purchase
Open-market purchase
S, Open-market sale
Open-market sale

Every value is as reported on the Form 4, totalled to the dollar. Share counts, the price per share and the full list of reporting owners are on each filing's own page, which every row here opens.

What this insider's stored lines contain

Exact counts over every stored line for this entity. This is a statement of composition, not a filter: the only filter this page offers is the open-market one above, because that is the only one an index serves today.

  • Open-market purchase 2
  • Open-market sale 0
  • Option exercise 0
  • Grant or award 0
  • Tax withholding 0
  • Disposition to the issuer 0
  • In-the-money option exercise 0

How to cite this page

ebomi catalog. Casdin Partners Master Fund, L.P., insider transactions. Retrieved 2026-08-23 from https://ebomi.com/insider/0001534265

Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6

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