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Cash Equivalents and Marketable Securities
6 Months Ended
Jun. 30, 2025
Cash Equivalents And Marketable Securities [Abstract]  
Cash Equivalents and Marketable Securities
4.
Cash Equivalents and Marketable Securities

We invest in certain U.S. government money market funds, treasury bills and commercial paper classified as cash equivalents. Our marketable securities consist of high investment grade fixed income securities that are invested in U.S. treasury bills.

Cash equivalents and marketable securities consisted of the following:

 

 

 

June 30, 2025

 

 

 

Amortized
Cost Basis

 

 

Unrealized
Gains

 

 

Unrealized
Losses

 

 

Estimated Fair
Value

 

 

 

(in thousands)

 

Cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

 

$

331,772

 

 

$

 

 

$

 

 

$

331,772

 

Treasury bills

 

 

31,365

 

 

 

1

 

 

 

 

 

 

31,366

 

Agency discount notes

 

 

14,969

 

 

 

 

 

 

 

 

 

14,969

 

Total cash equivalents

 

$

378,106

 

 

$

1

 

 

$

 

 

$

378,107

 

Marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

Treasury bills

 

 

7,939

 

 

 

 

 

 

 

 

 

7,939

 

Total marketable securities

 

 

7,939

 

 

 

 

 

 

 

 

 

7,939

 

Total cash equivalents and marketable
   securities

 

$

386,045

 

 

$

1

 

 

$

 

 

$

386,046

 

 

 

 

December 31, 2024

 

 

 

Amortized
Cost Basis

 

 

Unrealized
Gains

 

 

Unrealized
Losses

 

 

Estimated Fair
Value

 

 

 

(in thousands)

 

Cash equivalents:

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

 

$

294,872

 

 

$

 

 

$

 

 

$

294,872

 

Treasury bills

 

 

20,710

 

 

 

4

 

 

 

 

 

 

20,714

 

Agency discount notes

 

 

44,201

 

 

 

4

 

 

 

 

 

 

44,205

 

Total cash equivalents

 

$

359,783

 

 

$

8

 

 

$

 

 

$

359,791

 

 

There were no marketable securities as of December 31, 2024.