Omnicom Group Inc.
US ˙ NYSE ˙ US6819191064

SecurityOMC / Omnicom Group Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership180,598 shares
Latest Disclosed Value $ 13,601,310
Stifel Financial Corp reports 29.62% decrease in ownership of OMC / Omnicom Group Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 180,598 shares of Omnicom Group Inc. (US:OMC) valued at $13,600,835 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 256,619 shares of Omnicom Group Inc.. This represents a change in shares of -29.62% during the quarter. The current value of the position is $13,658,627 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)
2026-05-12 2026-03-31 13F OMNICOM GROUP COM 681919106 180,598 -76,021 -29.62 13,601 -34.36 0.0029
2026-02-13 2025-12-31 13F OMNICOM GROUP COM 681919106 256,619 120,474 88.49 20,722 86.70 0.0186
2025-11-12 2025-09-30 13F OMNICOM GROUP COM 681919106 136,145 76,895 129.78 11,100 160.42 0.0101
2025-08-14 2025-06-30 13F OMNICOM GROUP COM 681919106 59,250 -32,933 -35.73 4,262 -44.23 0.0041
2025-05-14 2025-03-31 13F OMNICOM GROUP COM 681919106 92,183 17,032 22.66 7,643 18.19 0.0081
2025-02-13 2024-12-31 13F OMNICOM GROUP COM 681919106 75,151 2,716 3.75 6,466 -13.66 0.0067
2024-11-14 2024-09-30 13F OMNICOM GROUP COM 681919106 72,435 4,594 6.77 7,489 23.07 0.0079
2024-08-13 2024-06-30 13F OMNICOM GROUP COM 681919106 67,841 -3,100 -4.37 6,085 -11.35 0.0068
2024-05-14 2024-03-31 13F OMNICOM GROUP COM 681919106 70,941 -3,540 -4.75 6,864 6.53 0.0078
2024-02-12 2023-12-31 13F OMNICOM GROUP COM 681919106 74,481 -1,160 -1.53 6,443 14.38 0.0081
2023-11-13 2023-09-30 13F OMNICOM GROUP COM 681919106 75,641 10,312 15.78 5,634 -9.38 0.0079
2023-08-14 2023-06-30 13F OMNICOM GROUP COM 681919106 65,329 -6,680 -9.28 6,216 -8.49 0.0085
2023-05-12 2023-03-31 13F OMNICOM GROUP COM 681919106 72,009 -4,133 -5.43 6,793 9.39 0.0097
2023-02-13 2022-12-31 13F OMNICOM GROUP COM 681919106 76,142 1,584 2.12 6,211 32.04 0.0093
2022-11-14 2022-09-30 13F OMNICOM GROUP COM 681919106 74,558 2,210 3.05 4,703 2.17 0.0077
2022-08-15 2022-06-30 13F OMNICOM GROUP COM 681919106 72,348 260 0.36 4,603 -24.78 0.0072
2022-05-13 2022-03-31 13F OMNICOM GROUP COM 681919106 72,088 3,882 5.69 6,119 22.45 0.0083
2022-02-14 2021-12-31 13F OMNICOM GROUP COM 681919106 68,206 97 0.14 4,997 1.26 0.0066
2021-11-15 2021-09-30 13F OMNICOM GROUP COM 681919106 68,109 1,428 2.14 4,935 -7.46 0.0072
2021-08-13 2021-06-30 13F OMNICOM GROUP COM 681919106 66,681 -2,467 -3.57 5,333 4.02 0.0080
2021-05-14 2021-03-31 13F OMNICOM GROUP COM 681919106 69,148 4,841 7.53 5,127 27.86 0.0085
2021-02-12 2020-12-31 13F OMNICOM GROUP COM 681919106 64,307 11,471 21.71 4,010 53.35 0.0072
2020-11-16 2020-09-30 13F OMNICOM GROUP COM 681919106 52,836 -3,215 -5.74 2,615 -14.57 0.0054
2020-08-14 2020-06-30 13F OMNICOM GROUP COM 681919106 56,051 -566 -1.00 3,061 -1.00 0.0070
2020-05-14 2020-03-31 13F OMNICOM GROUP COM 681919106 56,617 -55,387 -49.45 3,092 -65.94 0.0085
2020-02-13 2019-12-31 13F OMNICOM GROUP COM 681919106 112,004 2,836 2.60 9,078 6.26 0.0189
2019-11-19 2019-09-30 13F/A-1 OMNICOM GROUP COM 681919106 109,168 44,114 67.81 8,543 60.31 0.0218
2019-11-13 2019-09-30 13F OMNICOM GROUP COM 681919106 109,263 44,209 8,550 4,792.7035
2019-08-14 2019-06-30 13F OMNICOM GROUP COM 681919106 65,054 -1,154 -1.74 5,329 10.29 0.0137
2019-05-14 2019-03-31 13F OMNICOM GROUP COM 681919106 66,208 -5,308 -7.42 4,832 -7.43 0.0137
2019-02-13 2018-12-31 13F OMNICOM GROUP COM 681919106 71,516 21,711 43.59 5,220 54.30 0.0169
2018-11-13 2018-09-30 13F OMNICOM GROUP COM 681919106 49,805 -15,772 -24.05 3,383 -32.35 0.0097
2018-08-14 2018-06-30 13F OMNICOM GROUP COM 681919106 65,577 850 1.31 5,001 6.02 0.0153
2018-05-11 2018-03-31 13F OMNICOM GROUP COM 681919106 64,727 -1,387 -2.10 4,717 -2.22 0.0149
2018-02-14 2017-12-31 13F OMNICOM GROUP COM 681919106 66,114 16,638 33.63 4,824 31.52 0.0153
2017-11-13 2017-09-30 13F OMNICOM GROUP COM 681919106 49,476 -703 -1.40 3,668 -11.57 0.0127
2017-08-14 2017-06-30 13F OMNICOM GROUP COM 681919106 50,179 8,223 19.60 4,148 14.81 0.0154
2017-05-10 2017-03-31 13F OMNICOM GROUP COM 681919106 41,956 2,291 5.78 3,613 7.31 0.0140
2017-02-16 2016-12-31 13F OMNICOM GROUP COM 681919106 39,665 -14,757 -27.12 3,367 -27.22 0.0143
2016-11-15 2016-09-30 13F OMNICOM GROUP COM 681919106 54,422 -3,391 -5.87 4,626 -1.85 0.0208
2016-08-17 2016-06-30 13F OMNICOM GROUP COM 681919106 57,813 -23,326 -28.75 4,713 -30.20 0.0218
2016-05-16 2016-03-31 13F OMNICOM GROUP COM 681919106 81,139 20,595 34.02 6,752 47.39 0.0360
2016-03-21 2015-12-31 13F/A-2 OMNICOM GROUP COM 681919106 60,544 30,381 100.72 4,581 130.43 0.0239
2016-02-26 2015-12-31 13F/A-1 OMNICOM GROUP COM 681919106 60,532 -12 4,582 0.0240
2016-02-16 2015-12-31 13F OMNICOM GROUP COM 681919106 41,319 2,967
2015-11-16 2015-09-30 13F OMNICOM GROUP COM 681919106 30,163 620 2.10 1,988 -1.09 0.0112
2015-08-17 2015-06-30 13F/A-1 OMNICOM GROUP COM 681919106 29,543 13,214 80.92 2,010 57.89 0.0104
2015-08-17 2015-06-30 13F OMNICOM GROUP COM 681919106 20,050 1,392
2015-05-14 2015-03-31 13F OMNICOM GROUP COM 681919106 16,329 382 2.40 1,273 3.08 0.0070
2015-02-13 2014-12-31 13F OMNICOM GROUP COM 681919106 15,947 2,287 16.74 1,235 31.24 0.0069
2014-11-13 2014-09-30 13F OMNICOM GROUP COM 681919106 13,660 1,501 12.34 941 8.66 0.0083
2014-08-14 2014-06-30 13F OMNICOM GROUP COM 681919106 12,159 -229 -1.85 866 -3.67 0.0078
2014-05-15 2014-03-31 13F OMNICOM GROUP COM 681919106 12,388 12,388 899 0.0086
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.