Alternatives to CohnReznick LLP for 401(k) Audits

Peer audit practices selected by overlapping state footprint and similar engagement volume, from plan year 2024 Form 5500 filings. A neutral comparison: no firm pays to appear, and listing is not a recommendation.

Last updated September 6, 2026 · Source data: plan year 2024 Form 5500 filings

Which firms are comparable to CohnReznick LLP for 401(k) plan audits?

CohnReznick LLP audited 703 retirement plans in plan year 2024 across 35 states and territories (#15 nationally). Closest comparable practices by footprint and volume: WithumSmith+Brown, PC and Citrin Cooperman & Company, LLP; the table below lists 10 firms with linked profiles.

CohnReznick LLP at a glance

CohnReznick LLP: plan year 2024 Form 5500 audit engagements (for comparison)
Measure	Value
Retirement plan audits (401(k), 403(b), pension)	703
All audited filings (incl. welfare plans)	728
States and territories with clients	35
National rank by retirement plan volume	#15 of 3,956
Average client size (participants)	1,862
Largest client (participants)	137,769
Largest state concentrations	CT 133 · NY 115 · NJ 110

Full profile, including opinion mix and largest audited plans: CohnReznick LLP.

Audit firms comparable to CohnReznick LLP

Peer practices by footprint overlap and engagement volume relative to CohnReznick LLP, plan year 2024
#	Firm	Retirement plans audited	States served	States shared with CohnReznick LLP	Footprint overlap	Avg. client size
1	WithumSmith+Brown, PC	870	39	31	65%	5,491
2	Citrin Cooperman & Company, LLP	472	20	20	65%	905
3	Grant Thornton LLP	781	40	32	52%	5,006
4	PKF O'Connor Davies, LLP	577	27	22	54%	1,070
5	EisnerAmper LLP	580	31	26	52%	1,439
6	BDO USA, P.C.	1,237	45	33	63%	3,242
7	Ernst & Young LLP	519	42	33	55%	21,834
8	PricewaterhouseCoopers LLP	351	29	25	63%	13,426
9	Caron & Bletzer, PLLC	1,133	41	29	56%	863
10	Deloitte & Touche LLP	455	41	32	47%	14,274

Ordered by similarity to CohnReznick LLP, not by size. Footprint overlap is the share of the two firms’ state distributions that coincide (100% = identical state mix). Candidates: firms with between 141 and 3,515 retirement plan audits (within 5× of CohnReznick LLP’s volume). Average client size is the mean beginning-of-year participant count of the firm’s audited retirement plans.

Rankings derived from U.S. Department of Labor Form 5500 filings, plan year 2024. Read the full methodology.

Where the footprints overlap

CohnReznick LLP’s largest states and the comparable firms most active there, plan year 2024
State	CohnReznick LLP plans	Comparable firms active in the state (plans audited)
Connecticut	133	Caron & Bletzer, PLLC (51), PKF O'Connor Davies, LLP (39), Citrin Cooperman & Company, LLP (29)
New York	115	PKF O'Connor Davies, LLP (328), BDO USA, P.C. (181), Caron & Bletzer, PLLC (171)
New Jersey	110	WithumSmith+Brown, PC (170), EisnerAmper LLP (90), BDO USA, P.C. (69)
Massachusetts	48	Caron & Bletzer, PLLC (393), Citrin Cooperman & Company, LLP (64), BDO USA, P.C. (60)
Virginia	46	BDO USA, P.C. (59), Deloitte & Touche LLP (29), Grant Thornton LLP (27)

State reflects the plan sponsor’s address on Form 5500. Each state link opens the full ranked directory for that state.

How these alternatives were selected

Every firm in the dataset with at least 25 retirement plan audits in plan year 2024 was scored against CohnReznick LLP on two measures: footprint overlap — how closely its distribution of clients across states matches CohnReznick LLP’s — and volume similarity — how close its engagement count is on a logarithmic scale. Candidates are first limited to a volume band around CohnReznick LLP’s count (widened only when fewer than 8 firms qualify), then ranked by a weighted score (60% footprint, 40% volume). Ties resolve by volume, then name. The result is deterministic and rebuilds identically from the same filings.

What the score does not measure: audit quality, fees, staffing, industry focus, or fit for your plan. Volume and footprint indicate which firms do this work at comparable scale in the same places; they are a shortlist, not a verdict. Use each profile’s opinion mix and client-size figures, then the questions in how to switch 401(k) auditors to compare on what matters — EBPAQC membership, peer review results, team continuity, and a like-for-like fee.

Comparable-firm tables for other leading practices

Alternatives pages exist for the 25 largest employee benefit plan audit practices by retirement plan volume in plan year 2024.

About this page

Generated from public U.S. Department of Labor Form 5500 filings in which each firm is named as the plan’s independent qualified public accountant. None of the firms shown supplied, reviewed, or endorsed this comparison, and inclusion is neither a recommendation nor a criticism of any firm, including CohnReznick LLP. Filing data can contain sponsor-entered errors; corrections are welcome via the about page.