CITY OFFICE REIT INC (CIO) Institutional Ownership Changes & 13F Activity

CITY OFFICE REIT INC (CIO). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Newtyn Management, Llc, Fil Ltd, Nomura Holdings Inc, Magnetar Financial Llc, and Toronto Dominion Bank.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Transmarket Holdings LpBuy+10,000—10,000$69.90KQ4 2025May 13, 2026
Virtu Financial LlcBuy+61,580—61,580$430.00KQ4 2025Feb 23, 2026
Mercer Global Advisors IncBuy+12,628—12,628$88.27KQ4 2025Feb 18, 2026
Newtyn Management, LlcBuy+2,800,000—2,800,000$19.57MQ4 2025Feb 17, 2026
Fil LtdBuy+1,614,545—1,614,545$11.29MQ4 2025Feb 17, 2026
Nomura Holdings IncBuy+1,410,430—1,410,430$9.86MQ4 2025Feb 17, 2026
Magnetar Financial LlcBuy+1,012,143—1,012,143$7.07MQ4 2025Feb 17, 2026
Toronto Dominion BankBuy+612,093—612,093$4.28MQ4 2025Feb 17, 2026
Prelude Capital Management, LlcBuy+415,998—415,998$2.91MQ4 2025Feb 17, 2026
Northern Trust CorpBuy+325,778—325,778$2.28MQ4 2025Feb 17, 2026
Millennium Management LlcBuy+291,630—291,630$2.04MQ4 2025Feb 17, 2026
Engine Capital Management, LpBuy+231,020—231,020$1.61MQ4 2025Feb 17, 2026
Css Llc/IlBuy+207,013—207,013$1.45MQ4 2025Feb 17, 2026
Quantinno Capital Management LpBuy+177,732—177,732$1.24MQ4 2025Feb 17, 2026
Qube Research & Technologies LtdBuy+155,337—155,337$1.09MQ4 2025Feb 17, 2026
Xtx Topco LtdBuy+142,646—142,646$997.10KQ4 2025Feb 17, 2026
Cambria Investment Management, L.P.Buy+113,223—113,223$791.43KQ4 2025Feb 17, 2026
Lmr Partners LlpBuy+90,800—90,800$634.69KQ4 2025Feb 17, 2026
D. E. Shaw & Co., Inc.Buy+72,767—72,767$508.64KQ4 2025Feb 17, 2026
Alliancebernstein L.P.Buy+61,929—61,929$432.88KQ4 2025Feb 17, 2026
Water Island Capital LlcBuy+61,498—61,498$429.87KQ4 2025Feb 17, 2026
Penderfund Capital Management Ltd.Buy+58,700—58,700$410.31KQ4 2025Feb 17, 2026
Aqr Capital Management LlcBuy+47,504—47,504$332.06KQ4 2025Feb 17, 2026
Pharvision Advisers, LlcBuy+46,164—46,164$322.69KQ4 2025Feb 17, 2026
Odyssean, LlcBuy+44,385—44,385$310.25KQ4 2025Feb 17, 2026
Osaic Holdings, Inc.Buy+44,232—44,232$309.17KQ4 2025Feb 17, 2026
Castleknight Management LpBuy+42,300—42,300$295.68KQ4 2025Feb 17, 2026
Two Sigma Advisers, LpBuy+35,500—35,500$248.15KQ4 2025Feb 17, 2026
Bank Of America CorpBuy+30,849—30,849$215.63KQ4 2025Feb 17, 2026
State Of Wisconsin Investment BoardBuy+28,100—28,100$196.42KQ4 2025Feb 17, 2026
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Frequently asked questions about CIO activity

  • Which institutional owners are buying CIO?

    Institutional owners buying CIO include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in CIO activity?

    "Buy" means an investor increased their reported position in CIO compared to the prior reporting period. This reflects growing exposure to CITY OFFICE REIT INC (CIO) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in CIO increasing?

    Institutional interest in CIO can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.