ORION OFFICE REIT INC (ONL) Top Institutional Shareholders
ORION OFFICE REIT INC (ONL) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $52.39M in ONL holdings during the latest filing period.
Private Management Group Inc is currently the largest disclosed institutional shareholder of ONL tracked by InsiderSet, reporting ownership valued at approximately $11.60M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $14.95M, representing an estimated gain of +28.84% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 72% of the total disclosed ONL value among the investors covered in this analysis. Major shareholders include Private Management Group Inc, J. Goldman & Co Lp, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in ORION OFFICE REIT INC (ONL).
This page ranks the largest institutional ONL shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
188
Total Reported Value
$52.39M
Largest Holder
Private Management Group Inc
Largest Position
$11.60M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
210
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Private Management Group Inc | 0.33% | 5,395,475 | $11,600,271 | $14,945,466 | +$3,345,195 | +28.84% | |
| J. Goldman & Co Lp | 0.26% | 2,616,896 | $5,626,326 | $7,248,802 | +$1,622,476 | +28.84% | |
| Vanguard Capital Management Llc | 0.00% | 2,381,890 | $5,121,064 | $6,597,835 | +$1,476,771 | +28.84% | |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 1,706,100 | $3,668,115 | $4,725,897 | +$1,057,782 | +28.84% |
| Blackrock, Inc. | 0.00% | 1,444,213 | $3,105,059 | $4,000,470 | +$895,411 | +28.84% | |
| Rbf Capital, Llc | 0.11% | 1,000,000 | $2,150,000 | $2,770,000 | +$620,000 | +28.84% | |
| Rangeley Capital, Llc | 2.12% | 915,000 | $1,967,250 | $2,534,550 | +$567,300 | +28.84% | |
| Storebrand Asset Management As | 0.00% | 158,608 | $1,734,667 | $439,344 | -$1,295,323 | -74.67% | |
| Jane Street Group, Llc | 0.00% | 593,002 | $1,274,954 | $1,642,616 | +$367,662 | +28.84% | |
| Geode Capital Management, Llc | 0.00% | 590,895 | $1,271,256 | $1,636,779 | +$365,523 | +28.75% | |
| Dimensional Fund Advisors Lp | 0.00% | 571,758 | $1,229,063 | $1,583,770 | +$354,707 | +28.86% | |
| D. E. Shaw & Co., Inc. | 0.00% | 521,574 | $1,121,384 | $1,444,760 | +$323,376 | +28.84% | |
| Marshall Wace, Llp | 0.00% | 451,635 | $971,015 | $1,251,029 | +$280,014 | +28.84% | |
| Two Sigma Investments, Lp | 0.00% | 445,924 | $958,737 | $1,235,209 | +$276,472 | +28.84% | |
| Morgan Stanley | 0.00% | 358,843 | $771,516 | $993,995 | +$222,479 | +28.84% | |
| Charles Schwab Investment Management Inc | 0.00% | 315,337 | $677,975 | $873,483 | +$195,508 | +28.84% | |
| Vanguard Fiduciary Trust Co | 0.00% | 313,027 | $673,008 | $867,085 | +$194,077 | +28.84% | |
| Raymond James Financial Inc | 0.00% | 300,025 | $645,053 | $831,069 | +$186,016 | +28.84% | |
| Eversource Wealth Advisors, Llc | 0.02% | 12,782 | $548,397 | $35,406 | -$512,991 | -93.54% | |
| State Street Corp | 0.00% | 237,674 | $515,753 | $658,357 | +$142,604 | +27.65% | |
| Millennium Management Llc | 0.00% | 225,235 | $484,255 | $623,901 | +$139,646 | +28.84% | |
| Susquehanna International Group, Llp | 0.00% | 211,448 | $454,613 | $585,711 | +$131,098 | +28.84% | |
| Samalin Investment Counsel, Llc | 0.16% | 211,319 | $454,336 | $585,354 | +$131,018 | +28.84% | |
| 683 Capital Management, Llc | 0.04% | 208,134 | $447,488 | $576,531 | +$129,043 | +28.84% | |
| Citadel Advisors Llc | 0.00% | 144,832 | $311,389 | $401,185 | +$89,796 | +28.84% | |
| Northern Trust Corp | 0.00% | 119,427 | $256,769 | $330,813 | +$74,044 | +28.84% | |
| Xtx Topco Ltd | 0.00% | 111,521 | $239,770 | $308,913 | +$69,143 | +28.84% | |
| Nomura Asset Management Co Ltd | 0.00% | 92,200 | $198,230 | $255,394 | +$57,164 | +28.84% | |
| Goldman Sachs Group Inc | 0.00% | 91,971 | $197,738 | $254,760 | +$57,022 | +28.84% | |
| Engineers Gate Manager Lp | 0.00% | 91,206 | $196,093 | $252,641 | +$56,548 | +28.84% | |
| Quinn Opportunity Partners Llc | 0.01% | 90,768 | $195,151 | $251,427 | +$56,276 | +28.84% | |
| Asset Management One Co., Ltd. | 0.00% | 81,329 | $174,857 | $225,281 | +$50,424 | +28.84% | |
| Ubs Group Ag | 0.00% | 76,898 | $165,331 | $213,007 | +$47,676 | +28.84% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 76,302 | $164,049 | $211,357 | +$47,308 | +28.84% | |
| Invesco Ltd. | 0.00% | 65,817 | $141,506 | $182,313 | +$40,807 | +28.84% | |
| Nomura Asset Management International Inc. | 0.00% | 63,164 | $136,000 | $174,964 | +$38,964 | +28.65% | |
| Macquarie Group Ltd | 0.00% | 63,164 | $135,803 | $174,964 | +$39,161 | +28.84% | |
| Mariner, Llc | 0.00% | 59,944 | $128,881 | $166,045 | +$37,164 | +28.84% | |
| Sumitomo Mitsui Trust Group, Inc. | 0.00% | 58,879 | $126,590 | $163,095 | +$36,505 | +28.84% | |
| Fmr Llc | 0.00% | 58,200 | $125,130 | $161,214 | +$36,084 | +28.84% | |
| Stifel Financial Corp | 0.00% | 56,388 | $121,241 | $156,195 | +$34,954 | +28.83% | |
| Barclays Plc | 0.00% | 54,487 | $117,147 | $150,929 | +$33,782 | +28.84% | |
| Lpl Financial Llc | 0.00% | 51,584 | $110,905 | $142,888 | +$31,983 | +28.84% | |
| Bank Of America Corp | 0.00% | 42,214 | $90,760 | $116,933 | +$26,173 | +28.84% | |
| Qube Research & Technologies Ltd | 0.00% | 40,194 | $86,417 | $111,337 | +$24,920 | +28.84% | |
| Meeder Asset Management Inc | 0.00% | 39,876 | $85,733 | $110,457 | +$24,724 | +28.84% | |
| Squarepoint Ops Llc | 0.00% | 39,171 | $84,218 | $108,504 | +$24,286 | +28.84% | |
| Schonfeld Strategic Advisors Llc | 0.00% | 39,121 | $84,110 | $108,365 | +$24,255 | +28.84% | |
| Mitsubishi Ufj Asset Management Co., Ltd. | 0.00% | 37,889 | $81,461 | $104,953 | +$23,492 | +28.84% | |
| Catalyst Funds Management Pty Ltd | 0.01% | 35,900 | $77,185 | $99,443 | +$22,258 | +28.84% |
Frequently asked questions about ONL
Who owns the most ONL stock?
The largest holders of ONL are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ORION OFFICE REIT INC (ONL).
Is ONL widely held by superinvestors?
Many widely followed stocks like ONL appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ONL is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.