Omnicom Group Inc.
US ˙ NYSE ˙ US6819191064

SecurityOMC / Omnicom Group Inc.
InstitutionAdvisory Services Network, LLC
Latest Disclosed Ownership18,167 shares
Latest Disclosed Value $ 1,368,109
Advisory Services Network, LLC reports 84.06% increase in ownership of OMC / Omnicom Group Inc.

On May 15, 2026 - Advisory Services Network, LLC filed a 13F-HR form disclosing ownership of 18,167 shares of Omnicom Group Inc. (US:OMC) valued at $1,368,157 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 9,870 shares of Omnicom Group Inc.. This represents a change in shares of 84.06% during the quarter. The current value of the position is $1,373,970 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F OMNICOM GROUP INC COM Stock 681919106 18,167 8,297 84.06 1,368 71.64 0.0126
2026-02-17 2025-12-31 13F OMNICOM GROUP INC COM Stock 681919106 9,870 -5,458 -35.61 797 -36.19 0.0113
2025-11-18 2025-09-30 13F OMNICOM GROUP Stock 681919106 15,328 117 0.77 1,250 14.06 0.0183
2025-08-19 2025-06-30 13F OMNICOM GROUP Stock 681919106 15,211 -300 -1.93 1,096 -14.85 0.0176
2025-05-15 2025-03-31 13F OMNICOM GROUP Stock 681919106 15,511 5,258 51.28 1,286 45.80 0.0247
2025-02-13 2024-12-31 13F OMNICOM GROUP Stock 681919106 10,253 -1,999 -16.32 882 -19.75 0.0164
2024-11-14 2024-09-30 13F OMNICOM GROUP Stock 681919106 12,252 0 0.00 1,099 0.00 0.0227
2024-08-13 2024-06-30 13F OMNICOM GROUP Stock 681919106 12,252 2,758 29.05 1,099 19.72 0.0227
2024-05-06 2024-03-31 13F OMNICOM GROUP Stock 681919106 9,494 8,726 1,136.20 919 1,290.91 0.0204
2024-02-09 2023-12-31 13F OMNICOM GROUP Stock 681919106 768 -5,807 -88.32 66 -86.50 0.0016
2023-11-14 2023-09-30 13F OMNICOM GROUP Stock 681919106 6,575 343 5.50 490 -17.54 0.0132
2023-08-09 2023-06-30 13F OMNICOM GROUP Stock 681919106 6,232 -249 -3.84 593 -2.95 0.0158
2023-05-17 2023-03-31 13F OMNICOM GROUP Stock 681919106 6,481 5,723 755.01 611 901.64 0.0169
2023-02-13 2022-12-31 13F OMNICOM GROUP Stock 681919106 758 758 62 0.0019
2022-05-23 2022-03-31 13F OMNICOM GROUP Stock 681919106 0 -2,834 -100.00 0 -100.00
2022-02-14 2021-12-31 13F OMNICOM GROUP Stock 681919106 2,834 2,834 208 0.0060
2021-11-05 2021-09-30 13F OMNICOM GROUP Stock 681919106 0 -1,516 -100.00 0 -100.00
2021-08-12 2021-06-30 13F OMNICOM GROUP Stock 681919106 1,516 1,516 122 0.0038
2021-05-24 2021-03-31 13F OMNICOM GROUP Stock 681919106 0 -1,416 -100.00 0 -100.00
2021-02-09 2020-12-31 13F OMNICOM GROUP Stock 681919106 1,416 -5,970 -80.83 87 -76.23 0.0035
2020-11-16 2020-09-30 13F OMNICOM GROUP Stock 681919106 7,386 -334 -4.33 366 -13.06 0.0172
2020-08-10 2020-06-30 13F OMNICOM GROUP Stock 681919106 7,720 5,867 316.62 421 316.83 0.0231
2020-05-15 2020-03-31 13F OMNICOM GROUP Stock 681919106 1,853 362 24.28 101 -16.53 0.0066
2020-02-04 2019-12-31 13F OMNICOM GROUP Stock 681919106 1,491 -1,782 -54.45 121 -54.85 0.0064
2019-11-04 2019-09-30 13F OMNICOM GROUP Stock 681919106 3,273 0 0.00 268 0.00 0.0164
2019-08-01 2019-06-30 13F OMNICOM GROUP Stock 681919106 3,273 1,759 116.18 268 141.44 0.0164
2019-05-20 2019-03-31 13F OMNICOM GROUP Stock 681919106 1,514 -98 -6.08 111 -5.93 0.0078
2019-02-15 2018-12-31 13F OMNICOM GROUP Stock 681919106 1,612 -103 -6.01 118 0.85 0.0103
2018-11-02 2018-09-30 13F OMNICOM GROUP Stock 681919106 1,715 -28 -1.61 117 -2.50 0.0085
2018-07-27 2018-06-30 13F OMNICOM GROUP Stock 681919106 1,743 42 2.47 120 -3.23 0.0091
2018-04-23 2018-03-31 13F OMNICOM GROUP Stock 681919106 1,701 -4,875 -74.13 124 -74.11 0.0099
2018-02-08 2017-12-31 13F OMNICOM GROUP Stock 681919106 6,576 898 15.82 479 13.78 0.0418
2017-10-12 2017-09-30 13F OMNICOM GROUP Stock 681919106 5,678 40 0.71 421 -9.85 0.0482
2017-08-17 2017-06-30 13F OMNICOM GROUP INC COM Stock 681919106 5,638 1 0.02 467 -3.91 0.0609
2017-04-28 2017-03-31 13F OMNICOM GROUP INC COM Stock 681919106 5,637 5,403 2,308.97 486 2,330.00 0.0706
2016-10-07 2016-09-30 13F OMNICOM GROUP Stock 681919106 234 72 44.44 20 53.85 0.0038
2016-07-27 2016-06-30 13F OMNICOM GROUP Stock 681919106 162 -28 -14.74 13 -18.75 0.0030
2016-04-21 2016-03-31 13F OMNICOM GROUP Stock 681919106 190 1 0.53 16 14.29 0.0044
2016-01-27 2015-12-31 13F OMNICOM GROUP INC COM Stock 681919106 189 1 0.53 14 16.67 0.0045
2015-10-01 2015-09-30 13F OMNICOM GROUP INC COM Stock 681919106 188 121 180.60 12 140.00 0.0036
2015-07-02 2015-06-30 13F OMNICOM GROUP INC COM Stock 681919106 67 -23 -25.56 5 -28.57 0.0015
2015-04-08 2015-03-31 13F OMNICOM GROUP INC COM Stock 681919106 90 23 34.33 7 40.00 0.0019
2015-01-23 2014-12-31 13F OMNICOM GROUP Stock 681919106 67 -39 -36.79 5 -37.50 0.0016
2014-02-13 2013-12-31 13F OMNICOM GROUP Stock 681919106 106 106 8 0.0040
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.