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The Lean 100 · 2026 edition
No.86
Costello Asset Management logo

Costello Asset Management

Feasterville Trevose, PA · Firm website

83%AUM growth, 2024 to 2026
$389MAUM in the 2026 filing
12%client growth
3people at the firm

AUM by filing

$195M2023
$213M2024
$348M2025
$389M2026

Clients by filing

3202023
3492024
4042025
3902026

Key people

  • Robert CostelloPresidentOwner · 27 years at the firm
    in
  • Linda CostelloSecretaryOwner · 20 years at the firm

Against the list

  • MeasureThis firmList median
  • AUM growth83%104%
  • Client growth12%43%
  • People37
  • AUM per person$129.5M$49.7M

Rank by measure

  • Official rankNo. 8683%
  • Client growthNo. 9712%
  • AUM added per personNo. 13$58.6M
  • AUM per personNo. 7$129.5M

AUM jump noted: this firm reported a large one-year rise with no deal we could find behind it.

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Costello Asset Management: No. 86 on The Lean 100 (2026) — Private Wealth Daily