Omnicom Group Inc.
US ˙ NYSE ˙ US6819191064

SecurityOMC / Omnicom Group Inc.
InstitutionMercer Global Advisors Inc /adv
Latest Disclosed Ownership92,648 shares
Latest Disclosed Value $ 6,977,334
Mercer Global Advisors Inc /adv reports 6.71% increase in ownership of OMC / Omnicom Group Inc.

On May 15, 2026 - Mercer Global Advisors Inc /adv filed a 13F-HR form disclosing ownership of 92,648 shares of Omnicom Group Inc. (US:OMC) valued at $6,977,321 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 86,824 shares of Omnicom Group Inc.. This represents a change in shares of 6.71% during the quarter. The current value of the position is $6,977,321 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.

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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 COM 681919106 92,648 5,824 6.71 6,977 -11.20 0.0103
2026-02-17 2025-12-31 13F OMNICOM GROUP COM 681919106 86,824 54,552 169.04 7,857 198.63 0.0120
2025-11-14 2025-09-30 13F OMNICOM GROUP COM 681919106 32,272 4,088 14.50 2,631 29.80 0.0044
2025-08-14 2025-06-30 13F OMNICOM GROUP COM 681919106 28,184 -6,994 -19.88 2,028 -30.49 0.0041
2025-05-15 2025-03-31 13F OMNICOM GROUP COM 681919106 35,178 -4,729 -11.85 2,917 -15.06 0.0067
2025-02-14 2024-12-31 13F OMNICOM GROUP COM 681919106 39,907 -13,922 -25.86 3,434 -37.91 0.0084
2024-11-14 2024-09-30 13F OMNICOM GROUP COM 681919106 53,829 12,079 28.93 5,529 47.64 0.0129
2024-08-12 2024-06-30 13F OMNICOM GROUP COM 681919106 41,750 -476 -1.13 3,745 93,525.00 0.0102
2024-05-15 2024-03-31 13F OMNICOM GROUP COM 681919106 42,226 -7,080 -14.36 4 0.00 0.0116
2024-02-15 2023-12-31 13F OMNICOM GROUP COM 681919106 49,306 599 1.23 4 33.33 0.0128
2023-11-15 2023-09-30 13F/A-1 OMNICOM GROUP COM 681919106 48,707 328 0.68 4 -25.00 0.0138
2023-11-14 2023-09-30 13F OMNICOM GROUP COM 681919106 48,707 328 4 0.0138
2023-08-14 2023-06-30 13F OMNICOM GROUP COM 681919106 48,379 11,497 31.17 5 33.33 0.0183
2023-05-16 2023-03-31 13F OMNICOM GROUP COM 681919106 36,882 1,763 5.02 3 50.00 0.0158
2023-02-09 2022-12-31 13F OMNICOM GROUP COM 681919106 35,119 2,239 6.81 3 -99.90 0.0143
2022-11-15 2022-09-30 13F OMNICOM GROUP COM 681919106 32,880 16,938 106.25 2,074 104.54 0.0123
2022-08-10 2022-06-30 13F OMNICOM GROUP COM 681919106 15,942 -1,896 -10.63 1,014 -33.03 0.0062
2022-05-10 2022-03-31 13F OMNICOM GROUP COM 681919106 17,838 1,398 8.50 1,514 25.64 0.0089
2022-02-04 2021-12-31 13F OMNICOM GROUP COM 681919106 16,440 2,820 20.70 1,205 22.09 0.0074
2021-11-10 2021-09-30 13F OMNICOM GROUP COM 681919106 13,620 3,419 33.52 987 20.96 0.0069
2021-08-10 2021-06-30 13F OMNICOM GROUP COM 681919106 10,201 1,130 12.46 816 21.25 0.0063
2021-08-10 2021-03-31 13F/A-1 OMNICOM GROUP COM 681919106 9,071 914 11.21 673 32.22 0.0061
2021-05-11 2021-03-31 13F OMNICOM GROUP COM 681919106 8,871 714 658 0.0063
2021-02-12 2020-12-31 13F OMNICOM GROUP COM 681919106 8,157 -911 -10.05 509 13.36 0.0064
2020-12-10 2020-09-30 13F OMNICOM GROUP COM 681919106 9,068 1,497 19.77 449 8.72 0.0068
2020-08-10 2020-06-30 13F OMNICOM GROUP COM 681919106 7,571 678 9.84 413 9.26 0.0075
2020-05-18 2020-03-31 13F OMNICOM GROUP COM 681919106 6,893 -9,295 -57.42 378 -71.19 0.0083
2020-02-13 2019-12-31 13F OMNICOM GROUP INC COM COM 681919106 16,188 -111 -0.68 1,312 2.82 0.0262
2019-11-12 2019-09-30 13F OMNICOM GROUP INC COM COM 681919106 16,299 2,373 17.04 1,276 11.83 0.0300
2019-08-14 2019-06-30 13F OMNICOM GROUP INC COM COM 681919106 13,926 319 2.34 1,141 14.90 0.0302
2019-04-23 2019-03-31 13F/A-1 OMNICOM GROUP INC COM COM 681919106 13,607 13,607 993 0.0357
2019-04-12 2019-03-31 13F OMNICOM GROUP INC COM COM 681919106 5,437 398 0.0212
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.