401(k) · DOL Form 5500 · 2023

Mimecast North America, Inc. 401(k) Plan

Data updated 2026-08-25

$70M
Total assets Below avg plan size
903
Participants Near avg headcount
89th
Percentile by assets National rank
$77,551
Avg per participant Below avg balance/head
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Official DOL plan name: Mimecast North America, Inc. 401(k) Plan · Sponsored by Mimecast North America, Inc. · Massachusetts · Professional & Technical Services

$70M in assets, 903 participants

Mimecast North America, Inc.'s Mimecast North America, Inc. 401(k) Plan reported $70M in total assets and 903 participants in its 2023 DOL Form 5500 filing, ranking in the 89th 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.

  • #18,251 in Professional & Technical Services (20,321 peers)

Where Mimecast North America, Inc. 401(k) Plan sits by assets

Mimecast North America, Inc. 401(k) Plan sits in the top quartile of all filed plans by assets, $70M for 903 participants (~$77,551/participant), up 41.5% in 2023.

#18,251
in Professional & Technical Services (20,321 peers)
+41.5%
assets growth YoY
0.7×
vs typical plan assets (national mean)

Mimecast North America, Inc. 401(k) Plan's outsized position by total assets

Mimecast North America, Inc. 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$70,028,986 Top 11% higher than 89% of 127,068 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

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

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023

Mimecast North America, Inc. 401(k) Plan among mid-size filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Mimecast North America, Inc. 401(k) Plan sits mid-pack in the medium band (903 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Mimecast North America, Inc. 401(k) Plan reported net income rose from $1M in the plan year 2022 filing to $21M in the plan year 2023 filing.
  • Mimecast North America, Inc. 401(k) Plan end-of-year assets rose from $49M in the plan year 2022 filing to $70M in the plan year 2023 filing.
  • Mimecast North America, Inc. 401(k) Plan reported participants rose from 694 in the plan year 2022 filing to 903 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Published 5500 schedule card

Filing strip 260851633 · Mimecast North America, Inc. PY 2023 · 401(k)

Mimecast North America, Inc. 401(k) Plan · $70M · 903 · 89th

  • EBSA $70M
  • PART 903
  • TYPE 89th
  • NET 401(k)
  • BOOK near The Retirement Plan for Associates of Metromont LLC
  • VS-ST ind #18251

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 Professional & Technical Services retirement plans → · Plans in Massachusetts →

Mimecast North America, Inc. 401(k) Plan in the asset neighbourhood

Bay Family of Companies 401(k) PlanBay Family of Companies 401(…$70MTrellis Company 401(k) Plan$70MThe Retirement Plan for Associates of Metromont LLCThe Retirement Plan for Asso…$70MMimecast North America, Inc. 401(k) PlanMimecast North America, Inc.…$70MVigor Industrial LLC Savings PlanVigor Industrial LLC Savings…$70M
End-of-year total assets ($M) among Mimecast North America, Inc. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)$49M
Net Assets (End of Year)$70M
Net Income$21M
Employer EIN260851633
Plan Effective Date2009-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Mimecast North America, Inc.)

Sponsor-wide plan assets over time

All Mimecast North America, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$93M 88.18638117963408% vs 2022
2024 filing year
$40M$60M$80M$100M 202220232024 $49.5M $93.1M ▲ +88.2%
Year Plans Participants Total Assets
2022 1 694 $49M
2023 1 903 $70M
2024 1 840 $93M

Nearby 401(k) Plans in Massachusetts

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

Mimecast North America, Inc. 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Mimecast North America, Inc. 401(k) Plan, Total assets ($B): 0.070028986 · Participants: 903Mimecast North America, Inc. 401(k) PlanFidelity Retirement Savings Plan, Total assets ($B): 28.649852331 · Participants: 62289Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 10.556596852 · Participants: 37052Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 6.829912863 · Participants: 14094Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 5.786107181 · Participants: 19881Boston Scientific Corporation 401(k) Retirement Savings PlanPhilips North America 401(k) Plan, Total assets ($B): 5.779286156 · Participants: 19120Philips North America 401(k) Plan
Mimecast North America, Inc. 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Mimecast North America, Inc. 401(k) Plan side-by-side with 3 peers →

Mimecast North America, Inc. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is The Retirement Plan for Associates of Metromont LLC in SC ($70M); by covered participants it is United Cleanup Oak Ridge Retirement Savings Plan in TN (903 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($70M here).

Similar participant headcount

Nearest other-state filings by covered participants (903 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Mimecast North America, Inc. 401(k) Plan assets move in 2023? ▼
Mimecast North America, Inc. 401(k) Plan surged - up 41.5% during 2023, from $49M to $70M. Reported net income was $21M.
How have Mimecast North America, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mimecast North America, Inc.'s sponsor-wide assets grew 88.2%, from $49M to $93M.
Where does Mimecast North America, Inc. 401(k) Plan rank by assets among Form 5500 filers? ▼
Mimecast North America, Inc. 401(k) Plan ranks in the 89th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Mimecast North America, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is The Retirement Plan for Associates of Metromont LLC in SC ($70M, 914 participants).
Which 401(k) plans cover a similar participant headcount to Mimecast North America, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is United Cleanup Oak Ridge Retirement Savings Plan in TN (903 participants, $183M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 260851633.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.