CP
Insider
Casdin Partners Master Fund, L.P.
DirectorCasdin Partners Master Fund, L.P. (Director) filed 6 Form 4 reports as a reporting entity in the trailing twelve months (5 purchases, 1 sale), most often in LAB. Across 5 priced purchase filings, the average 21-session return was +14.0% from execution and +12.5% from disclosure (delay-adjusted; derived). The largest single filing was $28.1M of BLFS (1,200,000 sh across 3 lots, as filed), executed May 19.
Add to watchlistReturn, ttmiAverage return per filing, trailing twelve months
+14.0%
avg across 5 priced filings
Delay-adjustediThe same average, entered at disclosure dates
+12.5%
same 5 filings, from disclosure
Filings, ttm
6
5 buys · 1 sells
Median delay
2d
execution → disclosure
Volume, ttmiDollar value disclosed in the trailing twelve months
$42.6M
shares × price, as filed
Last traded
May 21
Filed May 21
Impact on $10,000 · 12M
$10,787 (+7.9%)
S&P 500 $11,725 (+17.2%) · 9.4 pts behind
Casdin Partners Master Fund, L.P.
S&P 500
Compounded across filings from disclosure dates · past 12 months
Open performance→Volume by month
Buys $16.2M
Sells $28.1M
Shares × price, as filed · by filing month · past 24 months
Sectors filed on
Not on file
6 filings
Sector per market data · by filing · past 12 months
Most traded names
LAB
LAB
LAB · 9 buys · 0 sells
9 filings
BLFS
BLFS
BLFS · 0 buys · 1 sell
1 filing
Recent filings
BLFSSALE
BIOLIFE SOLUTIONS INC
View filing →
$28.1M1,200,000 sh across 3 lots
Exec May 19
Filed May 21 · 5:30 PM ET LABPURCHASE STANDARD BIOTOOLS INC. View filing → $503K
350,000 sh across 3 lots
Exec Dec 2 2025
Filed Dec 4 2025 · 8:59 PM ET LABPURCHASE STANDARD BIOTOOLS INC. View filing → $10.1M
7,700,000 sh across 2 lots
Exec Nov 24 2025
Filed Nov 26 2025 · 4:58 PM ET LABPURCHASE STANDARD BIOTOOLS INC. View filing → $1.4M
1,075,000 sh across 3 lots
Exec Nov 18 2025
Filed Nov 20 2025 · 7:45 PM ET LABPURCHASE STANDARD BIOTOOLS INC. View filing → $1.1M
925,000 sh across 3 lots
Exec Nov 13 2025
Filed Nov 17 2025 · 6:58 PM ET LABPURCHASE STANDARD BIOTOOLS INC. View filing → $1.4M
1,175,000 sh across 4 lots
Exec Nov 7 2025
Filed Nov 12 2025 · 7:46 PM ET LABPURCHASE STANDARD BIOTOOLS INC. View filing → $129K
100,000 sh × $1.29
Exec Sep 9 2025
Filed Sep 11 2025 · 9:03 PM ET LABPURCHASE STANDARD BIOTOOLS INC. View filing → $636K
500,000 sh across 2 lots
Exec Sep 3 2025
Filed Sep 5 2025 · 7:08 PM ET More filings →