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HENNESSY ADVISORS INC

Position in OMC — Omnicom Group Inc.

CIK 1145255 NOVATO, CA

Position in OMC

as of Jun 30, 2026 · filed Jul 16, 2026
Position Value
$2,374,258
-$148,627 QoQ
Shares Held
32,600
-2.7% QoQ
Ownership
0.011%
of shares outstanding
% of Portfolio
0.08%
of 13F equity value
Holder Rank
#335
of 1,094 holders
Holding Since
Mar 2020
14 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in OMC Over Time

Shares Held

Position Value (USD)

Position in Advertising Agencies

Communication Services · as of Jun 30, 2026

HENNESSY ADVISORS INC holds $2,374,258 across 1 Advertising Agencies name. OMC ranks #1 (100.0% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 OMC
Omnicom Group Inc.
This page
32,600 $2,374,258

All Filings in OMC

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14 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $2,374,258 32,600
2026-03-31 $2,522,885 33,500
2024-12-31 $2,409,120 28,000
2024-09-30 $3,070,683 29,700
2024-06-30 $2,726,880 30,400
2024-03-31 $2,989,884 30,900
2021-12-31 $2,769,606 37,800
2021-09-30 $2,847,678 39,300
2021-06-30 $3,207,599 40,100
2021-03-31 $2,921,510 39,400
2020-12-31 $1,877,337 30,100
2020-09-30 $1,554,300 31,400
2020-06-30 $1,736,280 31,800
2020-03-31 $1,822,680 33,200