v3.26.1
Schedule H, Line 4i - Schedule of Assets (Held At End of Year)
12 Months Ended
Dec. 31, 2025
EBP 022 [Member]  
EBP, Schedule of Asset Held for Investment [Line Items]  
Schedule H, Line 4i – Schedule of Assets (Held At End of Year)
Cabot 401(k) Plan
Schedule H, Line 4i – Schedule of Assets (Held At End of Year)
As of December 31, 2025
  
EIN:
 04-2271897
  
PN: 022
 
a)    b)    c)    d)     e)  
    
Identity of issue, borrower,
lessor of similar party
   Description of investment
including maturity date, rate of
interest, collateral, par or maturity
value
   Cost     Current value  
*
  
Cabot Corporation
  
Company Stock
     **     $ 40,128,718  
*
  
Vanguard Institutional Index Fund
  
Mutual fund
     **       187,678,826  
*
  
Vanguard Wellington Fund
  
Mutual fund
     **       53,527,889  
*
  
Vanguard Total Bond Market Index Fund
  
Mutual fund
     **       64,937,034  
*
  
Vanguard Windsor II Fund
  
Mutual fund
     **       41,560,394  
*
  
Vanguard International Growth Fund
  
Mutual fund
     **       31,787,218  
*
  
Vanguard Extended Market Index Fund
  
Mutual fund
     **       42,173,888  
*
  
Vanguard Total International Stock Index Fund
  
Mutual fund
     **       51,497,298  
*
  
Vanguard Explorer Fund
  
Mutual fund
     **       31,460,073  
*
  
Vanguard Total International Bond Index Fund
  
Mutual fund
     **       13,407,219  
*
  
Vanguard International Value Fund
  
Mutual fund
     **       9,076,017  
*
  
Vanguard Federal Money Market Fund
  
Mutual fund
     **       772,359  
*
  
Vanguard Short-term Federal Fund
  
Mutual fund
     **       17,810,768  
*
  
Vanguard Inflation-Protected Securities Fund: Adm Shares
  
Mutual fund
     **       6,474,952  
*
  
Vanguard Target Retirement 2020 Trust II
  
Common collective trust
     **       10,526,514  
*
  
Vanguard Target Retirement 2025 Trust II
  
Common collective trust
     **       12,754,099  
*
  
Vanguard Target Retirement 2030 Trust II
  
Common collective trust
     **       38,858,350  
*
  
Vanguard Target Retirement 2035 Trust II
  
Common collective trust
     **       31,540,660  
*
  
Vanguard Target Retirement 2040 Trust II
  
Common collective trust
     **       25,569,787  
*
  
Vanguard Target Retirement 2045 Trust II
  
Common collective trust
     **       30,041,639  
*
  
Vanguard Target Retirement 2050 Trust II
  
Common collective trust
     **       31,012,717  
*
  
Vanguard Target Retirement 2055 Trust II
  
Common collective trust
     **       17,130,703  
*
  
Vanguard Target Retirement 2060 Trust II
  
Common collective trust
     **       7,784,829  
*
  
Vanguard Target Retirement 2065 Trust II
  
Common collective trust
     **       3,063,372  
*
  
Vanguard Target Retirement 2070 Trust II
  
Common collective trust
     **       546,925  
*
  
Vanguard Target Retirement Income Trust II
  
Common collective trust
     **       8,693,862  
*
  
Vanguard Target Retirement Income and Growth Trust II
  
Common collective trust
     **       6,995  
*
  
MFS Growth Equity Fund Class S
  
Common collective trust
     **       78,774,367  
*
  
Vanguard Retirement Savings Trust III
  
Common collective trust
     **       31,672,951  
  
Total investments on the Statement of Net Assets Available for Benefits
          920,270,423  
*
   Participant Loans    (5.25%
-10.5%)
     ----        3,617,716  
  
Total investments on the Form 5500
        $ 923,888,139  
*
   Indicates
party-in-interest
to the Plan
       
**
   Cost omitted for participant directed investments