Ticker · CUSIP 681919106
···Share
Holders (tracked)
17
Combined shares
25,999,277
Combined value
$2.06B
Last close
$78.76
Quarter
2025Q4
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
17142024Q12025Q4
Price is -0.7% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

30 events
  1. +5,300 shares · 2025Q4
    13F
  2. +3,945,814 shares · 2025Q4
    13F
  3. −79,726 shares · 2025Q4
    13F
  4. +2,412,077 shares · 2025Q4
    13F
  5. −143,910 shares · 2025Q4
    13F
  6. +901,956 shares · 2025Q4
    13F
  7. +61,340 shares · 2025Q4
    13F
  8. +140,670 shares · 2025Q4
    13F
  9. +4,364,797 shares · 2025Q4
    13F
  10. +168,646 shares · 2025Q4
    13F
  11. +57,691 shares · 2025Q4
    13F
  12. +1,088,333 shares · 2025Q4
    13F
  13. −1,053,215 shares · 2025Q4
    13F
  14. +1,737,069 shares · 2025Q4
    13F
  15. +211,126 shares · 2025Q4
    13F
  16. +33,557 shares · 2025Q4
    13F
  17. −544,353 shares · 2025Q3
    13F
  18. −1,489,128 shares · 2025Q3
    13F
  19. +26,748 shares · 2025Q3
    13F
  20. −209,251 shares · 2025Q3
    13F
  21. +703,285 shares · 2025Q3
    13F
  22. −7,991 shares · 2025Q3
    13F
  23. −3,980,918 shares · 2025Q3
    13F
  24. −247,312 shares · 2025Q3
    13F
  25. −123,092 shares · 2025Q3
    13F
  26. −107,500 shares · 2025Q3
    13F
  27. +286,639 shares · 2025Q3
    13F
  28. +6,318,477 shares · 2025Q3
    13F
  29. −260 shares · 2025Q3
    13F
  30. +138,951 shares · 2024Q3
    13F

Insider activity

No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of OMC…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
T. Rowe Price2016Q1$8.59+816.9%$36.7M
Renaissance Technologies2016Q2$76.27+3.3%$9.2M
Paul Tudor Jones (Tudor Investment)2016Q1$76.37+3.1%$417K
John Rogers (Ariel Investments)2016Q1$80.47-2.1%$85.7M
Mario Gabelli (GAMCO)2025Q2$80.62-2.3%$16.9M
Ken Griffin (Citadel Advisors)2016Q2$80.73-2.4%$333.8M
Ken Griffin (Citadel Advisors)2016Q2$80.73-2.4%$333.8M
Ken Griffin (Citadel Advisors)2016Q2$80.73-2.4%$333.8M
Bill Nygren (Harris / Oakmark)2025Q4$80.75-2.5%$4.8M
Jeremy Grantham (GMO)2016Q1$80.99-2.8%$22.9M
Ray Dalio (Bridgewater Associates)2020Q1$81.01-2.8%$64.2M
Izzy Englander (Millennium Mgmt)2016Q4$81.07-2.8%$929K
Izzy Englander (Millennium Mgmt)2016Q4$81.07-2.8%$929K
AQR Capital Management2016Q1$81.13-2.9%$291.9M
Wellington Management2016Q1$81.41-3.3%$409.5M
Norges Bank (Norway SWF)2016Q1$81.50-3.4%$136.8M
First Eagle Investment Management2016Q1$81.75-3.7%$500.3M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
13
$18.92B
2022Q2
13
$5.19B
2022Q3
13
$8.5M
2022Q4
14
$2.36B
2023Q1
14
$2.55B
2023Q2
17
$2.75B
2023Q3
14
$1.67B
2023Q4
12
$2.03B
2024Q1
14
$3.25B
2024Q2
13
$3.12B
2024Q3
13
$1.24B
2024Q4
11
$147.3M
2025Q1
15
$756.7M
2025Q2
17
$852.1M
2025Q3
17
$992.1M
2025Q4
17
$2.06B
Congress members trading this stock
DateMemberTypeAmount rangeFiling
2026-03-13Gilbert CisnerosBuy$1K – $15KPDF ↗
2025-04-08Rob BresnahanSell$1K – $15KPDF ↗

Who owns OMC

17 super-investors · 2025Q4
Tracked stake
26.00M
shares
Combined value
$2.06B
% of shares outstanding
shares-out unknown
Quarter action mix
New4Added12Trim1
#ManagerSharesValue
1First Eagle Investment Management6.35M$513M
2Wellington Management5.20M$420M
3Ken Griffin
Citadel Advisors
4.24M$342M
4AQR Capital Management3.71M$299M
5Norges Bank
Norway SWF
1.74M$140M
6Izzy Englander
Millennium Mgmt
1.62M$131M
7John Rogers
Ariel Investments
1.09M$88M
8Ray Dalio
Bridgewater Associates
815.1K$66M
9Jeremy Grantham
GMO
290.2K$23M
10Mario Gabelli
GAMCO
214.2K$17M
11Renaissance Technologies116.2K$9M
12Bill Nygren
Harris / Oakmark
61.3K$5M
13Ken Griffin
Citadel Advisors
41.5K$3M
14Ken Griffin
Citadel Advisors
34.3K$3M
15Izzy Englander
Millennium Mgmt
11.8K$953K
16Paul Tudor Jones
Tudor Investment
5.3K$428K
17T. Rowe Price465.9K$38K

Recent moves

20 transactions
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