Insiders who reported open-market trades in the last 12 months at the companies Casdin Partners Master Fund, L.P. files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
Greef Roderick de - $3.61M in BLFS purchases and sales in the last 12 months
Karen A. Foster - $2.03M in BLFS purchases and sales in the last 12 months
Troy Wichterman - $799K in BLFS purchases and sales in the last 12 months
Amy Duross - $257K in BLFS purchases and sales in the last 12 months
Joydeep Goswami - $48K in BLFS purchases and sales in the last 12 months
Aby J. Mathew - $25K in BLFS purchases and sales in the last 12 months
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Casdin Partners Master Fund, L.P. is an investment firm, tracked as 10% Owner of BIOLIFE SOLUTIONS INC (BLFS). InsiderAlpha holds 13 primary Form 4 filings for it, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Casdin Partners Master Fund, L.P. last file a Form 4?
The most recent primary Form 4 on record is dated 21 May 2026, one of 13 filings going back to 2025.
Has Casdin Partners Master Fund, L.P. been buying or selling stock?
Recorded transactions: 24 open-market purchases ($16.30M) and 6 open-market sales ($73.04M) across all tracked filings.
Casdin Partners Master Fund, L.P. is 10% Owner of BIOLIFE SOLUTIONS INC (BLFS). 13 SEC Form 4 filings on record going back to 2025, most recently on 21 May 2026. Most recent open-market trade: sold $15.40M of BLFS on 21 May 2026. Lifetime open-market purchases: $16.30M. Lifetime open-market sales: $73.04M.
Recent transactions
20
The latest 20 SEC Form 4 transactions reported by Casdin Partners Master Fund, L.P..
InsiderAlpha's records for Casdin Partners Master Fund, L.P. go back to 2025: 13 primary Form 4 filings, an average of 6.5 per year. The typical open-market purchase is $679K (24 buys totaling $16.30M). The largest single buy on record is $9.84M of LAB in 2025. Sales side: 6 recorded sales totaling $73.04M, so the filing history runs sell-heavy by dollar value. No recorded transaction carries a Rule 10b5-1 plan flag. An absent flag does not establish whether a transaction was pre-arranged or discretionary.
