401(k) · DOL Form 5500 · 2024

Cabot Corporation 401(k) Plan

Data updated 2026-08-25

$876M
Total assets Above avg plan size: 1,076
Participants Near avg headcount: 98th
Percentile by assets National rank: $813,713
Avg per participant High balance/head

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Official DOL plan name: Cabot 401(k) Plan · Sponsored by Cabot Corporation · Massachusetts · Manufacturing

$876M in assets, 1,076 participants

Cabot Corporation's Cabot 401(k) Plan reported $876M in total assets and 1,076 participants in its 2024 DOL Form 5500 filing, ranking in the 98th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

#17,258 in Manufacturing (17,777 peers)

Where Cabot 401(k) Plan sits by assets

Cabot 401(k) Plan sits in the top 5% of all filed plans by assets, $876M for 1,076 participants (~$813,713/participant), up 8.6% in 2024.

#17,258
in Manufacturing (17,777 peers): +8.6%
assets growth YoY: 8.8×
vs typical plan assets (national mean)

Cabot 401(k) Plan's outsized position by total assets

Cabot 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$875,555,560 Top 2% higher than 98% of 123,620 filed plans

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Cabot 401(k) Plan's large-plan peer group by participant headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Cabot 401(k) Plan lands in the large band (1,076 participants).

Micro (1-10) 33,766 filings (27%) Small (11-100) 26,107 filings (21%) Medium (101-1,000) 54,251 filings (43%) Large (1,001-10,000) 10,349 filings (8%) Mega (10,000+) 1,399 filings (1%)

Cabot 401(k) Plan reported net income fell from $91M in the plan year 2023 filing to $69M in the plan year 2024 filing.
Cabot 401(k) Plan end-of-year assets rose from $806M in the plan year 2023 filing to $876M in the plan year 2024 filing.

See the national 2023→2024 release diff →

Plan-year Form 5500 strip

Filing strip 042271897 · Cabot Corporation PY 2024 · 401(k)

Cabot 401(k) Plan · $876M · 1,076 · 98th

TYPE $876M
TYPE 1,076
TYPE 98th
TYPE 401(k)
TYPE near Njm 401(k) Retirement Plan
TYPE ind #17258

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Manufacturing retirement plans → · Plans in Massachusetts →

End-of-year total assets ($M) among Cabot 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Scale-class filing particulars (2024)

Total Assets (Beginning of Year)	$806M
Net Assets (End of Year)	$876M
Net Income	$69M
Employer EIN	042271897
Plan Effective Date	1988-09-09
Filing Status	FILING RECEIVED

Sponsor Plan History (Cabot Corporation)

Latest sponsor-wide plan assets: $876M 22.370952156245504% vs 2022; 2024 filing year

Year	Plans	Participants	Total Assets
2022	1	1,176	$715M
2023	1	1,073	$806M
2024	1	1,076	$876M

Nearby 401(k) Plans in Massachusetts

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Cabot 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants

Fidelity Retirement Savings Plan $34.2B · 66,907
Liberty Mutual 401(k) Plan $11.4B · 34,618
Massachusetts Institute of Technology Supplemental 401(k) Plan $7.7B · 14,762
Boston Scientific Corporation 401(k) Retirement Savings Plan $6.8B · 20,639
State Street Salary Savings Program $6.5B · 12,777

Compare Cabot 401(k) Plan side-by-side with 3 peers →

Cabot 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Njm 401(k) Retirement Plan in NJ ($876M); by covered participants it is Affinity Gaming Retirement Savings Plan in NV (1,076 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($876M here).

Njm 401(k) Retirement Plan (NJ) $876M · 2,424
Dairy Farmers of America, Inc. Super Savings Plan (KS) $875M · 6,773
The Adecco Group 401(k) Plan (FL) $874M · 52,924
Scripps Retirement and Investment Plan (OH) $874M · 5,348

Similar participant headcount

Nearest other-state filings by covered participants (1,076 participants); asset peers above are excluded.

Affinity Gaming Retirement Savings Plan (NV) 1,076 · 0 off
Copa Health 403(b) Retirement Plan (AZ) 1,076 · 0 off
Enlink Midstream Operating, LP 401(k) Trust (TX) 1,076 · 0 off
Melroe Savings and Investment Plan (ND) 1,076 · 0 off

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Cabot 401(k) Plan assets move in 2024? ▼

Cabot 401(k) Plan grew at a solid clip - up 8.6% during 2024, from $806M to $876M. Reported net income was $69M.

How have Cabot Corporation plan assets changed over time? ▼

Across 3 plan years on file (2022-2024), Cabot Corporation's sponsor-wide assets grew 22.4%, from $715M to $876M.

Where does Cabot 401(k) Plan rank by assets among Form 5500 filers? ▼

Cabot 401(k) Plan ranks in the 98th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top 5% of all filed plans by assets).

Which 401(k) plans are similar in size to Cabot 401(k) Plan? ▼

Among 401(k) plans in other states, the closest by assets is Njm 401(k) Retirement Plan in NJ ($876M, 2,424 participants).

Which 401(k) plans cover a similar participant headcount to Cabot 401(k) Plan? ▼

Among 401(k) plans in other states, the closest by covered participants is Affinity Gaming Retirement Savings Plan in NV (1,076 participants, $38M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 042271897.