William Blair & Company
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William Blair & Company’s Omnicom Group OMC Stock Holding History

William Blair & Company’s Portfolio OMC Stock Details OMC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$8.9M Sell
118,199
-620
-0.5% -$48.1K 0.03% 372
2025
Q4 		$9.59M Buy
118,819
+2,477
+2% +$189K 0.03% 366
2025
Q3 		$9.49M Sell
116,342
-1,031
-0.9% -$77.9K 0.03% 371
2025
Q2 		$8.44M Buy
117,373
+315
+0.3% +$23.3K 0.02% 382
2025
Q1 		$9.71M Sell
117,058
-1,240
-1% -$104K 0.03% 336
2024
Q4 		$10.2M Sell
118,298
-5,013
-4% -$497K 0.03% 338
2024
Q3 		$12.7M Sell
123,311
-719
-0.6% -$69.1K 0.04% 312
2024
Q2 		$11.1M Sell
124,030
-287
-0.2% -$26.6K 0.03% 308
2024
Q1 		$12M Sell
124,317
-4,716
-4% -$423K 0.04% 301
2023
Q4 		$11.2M Sell
129,033
-103,245
-44% -$8.14M 0.04% 298
2023
Q3 		$17.3M Sell
232,278
-441
-0.2% -$36.4K 0.07% 215
2023
Q2 		$22.1M Sell
232,719
-4,691
-2% -$436K 0.08% 191
2023
Q1 		$22.4M Buy
237,410
+3,944
+2% +$349K 0.09% 189
2022
Q4 		$19M Buy
233,466
+263
+0.1% +$19.5K 0.08% 201
2022
Q3 		$14.7M Buy
233,203
+928
+0.4% +$62.9K 0.07% 221
2022
Q2 		$14.8M Buy
232,275
+651
+0.3% +$48.2K 0.07% 233
2022
Q1 		$19.7M Sell
231,624
-6,140
-3% -$493K 0.07% 224
2021
Q4 		$17.4M Buy
237,764
+3,892
+2% +$277K 0.05% 251
2021
Q3 		$16.9M Sell
233,872
-1,083
-0.5% -$80.5K 0.06% 249
2021
Q2 		$18.8M Sell
234,955
-5,944
-2% -$483K 0.07% 229
2021
Q1 		$17.9M Sell
240,899
-4,970
-2% -$343K 0.07% 228
2020
Q4 		$15.3M Sell
245,869
-1,408
-0.6% -$80.5K 0.06% 244
2020
Q3 		$12.2M Buy
247,277
+2,226
+0.9% +$119K 0.05% 246
2020
Q2 		$13.4M Buy
245,051
+1,110
+0.5% +$60.4K 0.06% 222
2020
Q1 		$13.4M Buy
243,941
+837
+0.3% +$59.4K 0.08% 194
2019
Q4 		$19.7M Sell
243,104
-13,593
-5% -$1.07M 0.1% 194
2019
Q3 		$20.1M Sell
256,697
-1,564
-0.6% -$124K 0.12% 176
2019
Q2 		$21.2M Sell
258,261
-4,645
-2% -$367K 0.12% 164
2019
Q1 		$19.2M Sell
262,906
-4,641
-2% -$349K 0.12% 174
2018
Q4 		$19.6M Sell
267,547
-928
-0.3% -$68.8K 0.14% 152
2018
Q3 		$18.3M Buy
268,475
+162
+0.1% +$11.4K 0.11% 180
2018
Q2 		$20.5M Sell
268,313
-432
-0.2% -$31.9K 0.14% 152
2018
Q1 		$19.5M Buy
268,745
+768
+0.3% +$57.6K 0.14% 154
2017
Q4 		$19.5M Sell
267,977
-808
-0.3% -$58K 0.13% 162
2017
Q3 		$19.9M Sell
268,785
-454
-0.2% -$35K 0.15% 151
2017
Q2 		$22.3M Sell
269,239
-4,558
-2% -$380K 0.17% 141
2017
Q1 		$23.6M Sell
273,797
-874
-0.3% -$74.6K 0.19% 132
2016
Q4 		$23.4M Sell
274,671
-664
-0.2% -$55.7K 0.21% 123
2016
Q3 		$23.4M Buy
275,335
+1,555
+0.6% +$130K 0.21% 121
2016
Q2 		$22.3M Buy
273,780
+716
+0.3% +$59.5K 0.21% 124
2016
Q1 		$22.7M Buy
273,064
+243,236
+815% +$18.3M 0.21% 125
2015
Q4 		$2.26M Sell
29,828
-1
-0% -$73 0.02% 439
2015
Q3 		$1.97M Sell
29,829
-3,840
-11% -$269K 0.02% 533
2015
Q2 		$2.34M Buy
33,669
+3,428
+11% +$259K ﹤0.01% 1289
2015
Q1 		$2.36M Sell
30,241
-1,593
-5% -$122K ﹤0.01% 1264
2014
Q4 		$2.47M Buy
31,834
+15,424
+94% +$1.13M ﹤0.01% 1237
2014
Q3 		$1.13M Buy
16,410
+1,068
+7% +$76.2K ﹤0.01% 1427
2014
Q2 		$1.09M Sell
15,342
-22,700
-60% -$1.58M ﹤0.01% 1427
2014
Q1 		$2.76M Sell
38,042
-4,012
-10% -$295K ﹤0.01% 1110
2013
Q4 		$3.13M Sell
42,054
-1,244
-3% -$85.5K 0.01% 1037
2013
Q3 		$2.75M Buy
43,298
+27,970
+182% +$1.78M ﹤0.01% 1045
2013
Q2 		$964K Buy
+15,328
New +$940K ﹤0.01% 1292

Other funds holding OMC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
First Eagle Investment Management
First Eagle Investment Management New York $59B AUM 32.99% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

William Blair & Company's OMC Position: Q1 2026 in Review

William Blair & Company reduced its Omnicom Group (OMC) stake by 0.52% in Q1 2026, selling an estimated $48.1K and leaving 118,199 shares worth $8.9M. The position accounts for 0.03% of the portfolio, ranked #372.

William Blair & Company first reported a position in OMC in Q2 2013 and has held it in 52 quarters since. The position peaked at $23.6M in Q1 2017. 1,123 funds tracked by Wall St. Rank hold OMC as of Q1 2026.

  • William Blair & Company held 118,199 shares of Omnicom Group worth $8.9M as of Q1 2026.
  • William Blair & Company sold 620 Omnicom Group shares in Q1 2026, an estimated $48.1K.
  • Omnicom Group made up 0.03% of William Blair & Company's portfolio in Q1 2026, its #372 holding.
  • William Blair & Company first reported a position in Omnicom Group in Q2 2013 and has held it in 52 quarters since.
  • William Blair & Company's Omnicom Group position peaked at $23.6M in Q1 2017.
  • 1,123 funds tracked by Wall St. Rank held Omnicom Group as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.