Omnicom Group Inc.
US ˙ NYSE ˙ US6819191064

SecurityOMC / Omnicom Group Inc.
InstitutionBoston Trust Walden Corp
Latest Disclosed Ownership13,446 shares
Latest Disclosed Value $ 1,012,618
Boston Trust Walden Corp reports 14.33% decrease in ownership of OMC / Omnicom Group Inc.

On April 24, 2026 - Boston Trust Walden Corp filed a 13F-HR form disclosing ownership of 13,446 shares of Omnicom Group Inc. (US:OMC) valued at $1,012,618 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 15,696 shares of Omnicom Group Inc.. This represents a change in shares of -14.33% during the quarter. The current value of the position is $991,508 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)
2026-04-24 2026-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 13,446 -2,250 -14.33 1,013 -20.13 0.0050
2026-01-28 2025-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 15,696 -600 -3.68 1,267 -4.59 0.0096
2025-10-17 2025-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 16,296 -1,725 -9.57 1,329 2.47 0.0097
2025-07-28 2025-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 18,021 -9,633 -34.83 1,296 -43.46 0.0092
2025-04-21 2025-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 27,654 -137,329 -83.24 2,293 -83.85 0.0168
2025-01-24 2024-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 164,983 -960 -0.58 14,195 -17.26 0.0996
2024-10-24 2024-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 165,943 -20,488 -10.99 17,157 2.60 0.1194
2024-07-19 2024-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 186,431 14,153 8.22 16,723 0.32 0.1240
2024-04-22 2024-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 172,278 -296,563 -63.25 16,670 -58.90 0.1189
2024-01-24 2023-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 468,841 2,495 0.54 40,559 16.77 0.3060
2023-10-18 2023-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 466,346 2,762 0.60 34,733 -21.26 0.2911
2023-07-24 2023-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 463,584 -190,635 -29.14 44,110 -28.53 0.3618
2023-04-19 2023-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 654,219 -27,462 -4.03 61,719 11.00 0.5327
2023-01-20 2022-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 681,681 -56,522 -7.66 55,605 19.39 0.4889
2022-10-19 2022-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 738,203 -29,773 -3.88 46,574 -4.66 0.4614
2022-07-22 2022-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 767,976 17,021 2.27 48,851 -23.36 0.4616
2022-04-20 2022-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 750,955 97,985 15.01 63,741 33.23 0.5265
2022-01-21 2021-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 652,970 94,062 16.83 47,843 18.14 0.3842
2021-10-25 2021-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 558,908 -8,604 -1.52 40,498 -10.79 0.3586
2021-07-22 2021-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 567,512 19,266 3.51 45,395 11.66 0.4036
2021-04-21 2021-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 548,246 54,069 10.94 40,653 31.90 0.3937
2021-01-15 2020-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 494,177 151,261 44.11 30,822 81.57 0.3288
2020-10-14 2020-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 342,916 -20,946 -5.76 16,975 -14.56 0.2114
2020-07-23 2020-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 363,862 -184,995 -33.71 19,867 -34.07 0.2683
2020-04-24 2020-03-31 13F/A-1 OMNICOM GROUP COMMON STOCK 681919106 548,857 -108,729 -16.53 30,132 -43.44 0.4802
2020-04-21 2020-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 548,857 -108,729 30,132 267,189.5774
2020-01-10 2019-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 657,586 -5,830 -0.88 53,278 2.57 0.6201
2019-10-21 2019-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 663,416 -12,243 -1.81 51,945 -6.19 0.6530
2019-07-25 2019-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 675,659 5,600 0.84 55,370 13.21 0.7205
2019-04-16 2019-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 670,059 25,175 3.90 48,907 3.55 0.6658
2019-01-17 2018-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 644,884 -10,250 -1.56 47,231 5.99 0.7515
2018-10-23 2018-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 655,134 -34,039 -4.94 44,562 -15.22 0.6139
2018-07-25 2018-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 689,173 -11,370 -1.62 52,564 3.25 0.7713
2018-04-13 2018-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 700,543 -82,052 -10.48 50,908 -10.68 0.7724
2018-01-29 2017-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 782,595 -93,555 -10.68 56,996 -12.17 0.8355
2017-10-13 2017-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 876,150 -485 -0.06 64,897 -10.70 1.0105
2017-07-19 2017-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 876,635 3,786 0.43 72,673 -3.42 1.1677
2017-04-24 2017-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 872,849 8,545 0.99 75,248 2.29 1.1726
2017-02-07 2016-12-31 13F/A-1 OMNICOM GROUP COMMON STOCK 681919106 864,304 3,308 0.38 73,560 0.51 1.1597
2017-02-01 2016-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 864,304 73,560
2016-10-17 2016-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 860,996 11,681 1.38 73,184 5.74 1.2065
2016-08-09 2016-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 849,315 4,164 0.49 69,210 -1.61 1.1821
2016-04-19 2016-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 845,151 -2,875 -0.34 70,342 9.63 1.2247
2016-01-21 2015-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 848,026 -7,495 -0.88 64,161 13.81 1.1901
2015-10-29 2015-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 855,521 3,940 0.46 56,378 -4.73 0.9417
2015-07-17 2015-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 851,581 2,010 0.24 59,176 -10.68 0.9024
2015-04-15 2015-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 849,571 849,571 0.00 66,249 0.9834
2015-01-28 2014-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 0 -766,699 -100.00 0 -100.00
2014-10-23 2014-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 766,699 50,555 7.06 52,795 3.51 0.8153
2014-08-01 2014-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 716,144 -15,140 -2.07 51,004 -3.93 0.7412
2014-04-11 2014-03-31 13F OMNICOM GROUP COMMON STOCK 681919106 731,284 6,925 0.96 53,092 -1.45 0.7886
2014-02-11 2013-12-31 13F OMNICOM GROUP COMMON STOCK 681919106 724,359 -13,523 -1.83 53,871 15.08 0.7859
2013-11-15 2013-09-30 13F OMNICOM GROUP COMMON STOCK 681919106 737,882 -7,610 -1.02 46,811 -0.12 0.7162
2013-08-08 2013-06-30 13F OMNICOM GROUP COMMON STOCK 681919106 745,492 745,492 46,869 0.7567
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.