OMNICOM GROUP INC

Ticker: OMC CUSIP: 681919106 Class: COM

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 104,572 Value ($000) $8,444 Avg Close $75.76 Range $69.18 - $82.39

Q3 2025

Shares 305,486 Value ($000) $24,906 Avg Close $74.34 Range $69.07 - $82.15

Q2 2025

Shares 591,712 Value ($000) $42,568 Avg Close $71.94 Range $67.10 - $80.64

Q1 2025

Shares 831,848 Value ($000) $68,969 Avg Close $80.64 Range $76.47 - $86.12

Q4 2024

Shares 35,041 Value ($000) $3,015 Avg Close $94.87 Range $81.50 - $102.31

Q4 2023

Shares 4,900 Value ($000) $424 Avg Close $73.20 Range $66.98 - $82.23

Q1 2023

Shares 36,300 Value ($000) $3,425 Avg Close $80.37 Range $73.85 - $87.38

Q3 2022

Shares 230,939 Value ($000) $14,569 Avg Close $60.29 Range $54.43 - $65.53

Q2 2022

Shares 105,644 Value ($000) $6,722 Avg Close $65.19 Range $54.75 - $76.93

Q4 2021

Shares 835,595 Value ($000) $61,224 Avg Close $61.44 Range $56.73 - $66.97

Q3 2021

Shares 305,125 Value ($000) $22,109 Avg Close $63.56 Range $60.09 - $69.72

Q2 2021

Shares 77,845 Value ($000) $6,226 Avg Close $68.98 Range $62.74 - $73.18

Q1 2021

Shares 12,074 Value ($000) $896 Avg Close $58.12 Range $50.68 - $66.03

Q4 2020

Shares 154,713 Value ($000) $9,649 Avg Close $47.57 Range $36.97 - $54.67

Q3 2020

Shares 262,891 Value ($000) $13,013 Avg Close $44.01 Range $39.88 - $47.39

Q2 2020

Shares 160,590 Value ($000) $8,769 Avg Close $44.27 Range $37.85 - $51.94

Q1 2020

Shares 370,329 Value ($000) $20,331 Avg Close $57.15 Range $37.64 - $65.23

Q3 2019

Shares 54,031 Value ($000) $4,230 Avg Close $62.85 Range $59.00 - $67.24

Q1 2017

Shares 20,221 Value ($000) $1,739 Avg Close $62.46 Range $61.24 - $63.88

Q4 2016

Shares 149,782 Value ($000) $12,748 Avg Close $60.96 Range $57.12 - $65.10

Q3 2016

Shares 25,572 Value ($000) $2,173 Avg Close $60.52 Range $57.66 - $63.12

Q2 2014

Shares 251,225 Value ($000) $17,892 Avg Close $47.35 Range $44.41 - $49.44

Q1 2014

Shares 25,280 Value ($000) $1,835 Avg Close $49.73 Range $47.66 - $52.06

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	104,572	$8,444	$75.76	$69.18 - $82.39
Q3 2025	305,486	$24,906	$74.34	$69.07 - $82.15
Q2 2025	591,712	$42,568	$71.94	$67.10 - $80.64
Q1 2025	831,848	$68,969	$80.64	$76.47 - $86.12
Q4 2024	35,041	$3,015	$94.87	$81.50 - $102.31
Q4 2023	4,900	$424	$73.20	$66.98 - $82.23
Q1 2023	36,300	$3,425	$80.37	$73.85 - $87.38
Q3 2022	230,939	$14,569	$60.29	$54.43 - $65.53
Q2 2022	105,644	$6,722	$65.19	$54.75 - $76.93
Q4 2021	835,595	$61,224	$61.44	$56.73 - $66.97
Q3 2021	305,125	$22,109	$63.56	$60.09 - $69.72
Q2 2021	77,845	$6,226	$68.98	$62.74 - $73.18
Q1 2021	12,074	$896	$58.12	$50.68 - $66.03
Q4 2020	154,713	$9,649	$47.57	$36.97 - $54.67
Q3 2020	262,891	$13,013	$44.01	$39.88 - $47.39
Q2 2020	160,590	$8,769	$44.27	$37.85 - $51.94
Q1 2020	370,329	$20,331	$57.15	$37.64 - $65.23
Q3 2019	54,031	$4,230	$62.85	$59.00 - $67.24
Q1 2017	20,221	$1,739	$62.46	$61.24 - $63.88
Q4 2016	149,782	$12,748	$60.96	$57.12 - $65.10
Q3 2016	25,572	$2,173	$60.52	$57.66 - $63.12
Q2 2014	251,225	$17,892	$47.35	$44.41 - $49.44
Q1 2014	25,280	$1,835	$49.73	$47.66 - $52.06