Orion Office REIT Inc. (ONL) Ownership
ONL ownership summary
as of October 17, 2026- Institutions
- 60.0% of shares outstanding
- Insiders
- 7.75% of shares outstanding
- Shares outstanding
- 57.0M
- Float
- 49.7M shares available to trade
- Short interest
- 4.42% 2.5M shares short
- Days to cover
- 10.21 short interest up 10.5% vs prior month
- Institutions 60.03%
- Insiders 7.75%
- Other investors 32.22%
ONL top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Private Management Group Inc | 9.39% | 5.4M | $11.0M | −38,172 (−0.7%) | June 30, 2026 |
| 2 | BlackRock Inc | 7.67% | 4.4M | $9.0M | +2.9M (+203.1%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 4.25% | 2.4M | $5.0M | +45,118 (+1.9%) | June 30, 2026 |
| 4 | Renaissance Technologies Corp | 3.27% | 1.9M | $3.8M | +159,700 (+9.4%) | June 30, 2026 |
| 5 | Parkwood LLC | 2.61% | 1.5M | $3.1M | −449,572 (−23.2%) | June 30, 2026 |
| 6 | J. Goldman & Co LP | 2.43% | 1.4M | $2.9M | −1.2M (−47.1%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.32% | 1.3M | $2.7M | +734,885 (+124.4%) | June 30, 2026 |
| 8 | RBF LLC | 1.75% | 1.0M | $2.1M | — | June 30, 2026 |
| 9 | Marshall Wace Asset Management Ltd | 1.35% | 768K | $1.6M | +316,552 (+70.1%) | June 30, 2026 |
| 10 | Two Sigma Investments LLC | 1.24% | 708K | $1.5M | +262,145 (+58.8%) | June 30, 2026 |
| 11 | State Street Corp | 1.00% | 573K | $1.2M | +335,600 (+141.2%) | June 30, 2026 |
| 12 | Dimensional Fund Advisors, Inc. | 0.87% | 498K | $1.0M | −73,615 (−12.9%) | June 30, 2026 |
| 13 | Charles Schwab Investment Management Inc | 0.77% | 441K | $907,723 | +125,305 (+39.7%) | June 30, 2026 |
| 14 | Northern Trust Corp | 0.73% | 415K | $854,039 | +295,155 (+247.1%) | June 30, 2026 |
| 15 | Vanguard Portfolio Management, LLC | 0.64% | 363K | $747,636 | +362,930 (0.0%) | June 30, 2026 |
| 16 | Vanguard Fiduciary Trust Co | 0.62% | 355K | $731,943 | +42,285 (+13.5%) | June 30, 2026 |
| 17 | Morgan Stanley - Brokerage Accounts | 0.62% | 352K | $724,387 | −7,199 (−2.0%) | June 30, 2026 |
| 18 | Cambria Investment Management, L.P. | 0.57% | 324K | $668,301 | +324,418 (0.0%) | June 30, 2026 |
| 19 | D. E. Shaw & Co LP | 0.48% | 273K | $563,148 | −248,201 (−47.6%) | June 30, 2026 |
| 20 | 683 Capital Management LLC | 0.36% | 208K | $428,756 | — | March 31, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 12 holders added 5.9M shares and 6 cut 2.0M.
ONL top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.13% | 1.8M | $3.7M | — | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 2.22% | 1.3M | $2.6M | −14,592 (−1.1%) | September 30, 2026 |
| 3 | Fidelity Small Cap Index | 1.04% | 595K | $1.2M | −733 (−0.1%) | July 31, 2026 |
| 4 | iShares Russell 2000 Value ETF | 0.88% | 505K | $1.0M | +766 (+0.2%) | September 30, 2026 |
| 5 | Vanguard Russell 2000 ETF | 0.54% | 310K | $638,367 | +6,120 (+2.0%) | August 31, 2026 |
| 6 | Schwab US Small-Cap ETF™ | 0.52% | 296K | $610,580 | +198 (+0.1%) | September 30, 2026 |
| 7 | Cambria Global Real Estate ETF | 0.48% | 271K | $559,203 | — | September 30, 2026 |
| 8 | Fidelity Extended Market Index | 0.35% | 197K | $406,098 | −1,059 (−0.5%) | August 31, 2026 |
| 9 | DFA Global Real Estate Securities Port | 0.33% | 187K | $384,583 | — | August 31, 2026 |
| 10 | iShares Micro-Cap ETF | 0.29% | 168K | $346,679 | −1,161 (−0.7%) | September 30, 2026 |
| 11 | iShares Core S&P Total US Stock Mkt ETF | 0.28% | 159K | $327,680 | +140 (+0.1%) | September 30, 2026 |
| 12 | DFA Real Estate Securities I | 0.26% | 150K | $308,623 | +18,952 (+14.5%) | August 31, 2026 |
| 13 | Schwab Small Cap Index | 0.23% | 130K | $268,533 | — | August 31, 2026 |
| 14 | Adirondack Small Cap | 0.22% | 126K | $259,943 | −66,193 (−34.4%) | June 30, 2026 |
| 15 | iShares Russell 2000 Small-Cap Idx Instl | 0.18% | 100K | $206,960 | — | August 31, 2026 |
| 16 | Fidelity Total Market Index | 0.17% | 98K | $201,460 | — | August 31, 2026 |
| 17 | Goldman Sachs ActiveBeta® US SmCp Eq ETF | 0.17% | 95K | $195,883 | — | September 30, 2026 |
| 18 | Fidelity Series Total Market Index | 0.15% | 86K | $176,558 | — | August 31, 2026 |
| 19 | Dimensional Global Real Estate ETF | 0.14% | 82K | $168,632 | — | September 30, 2026 |
| 20 | Fidelity Small Cap Value Index | 0.14% | 79K | $163,138 | +3,042 (+4.0%) | July 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ONL insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-08-27 | Reginald Harold Gilyard | Buy | $2.91 | 55,000 | $160,050 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ONL shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ONL
Institutional investors own 60.0% of Orion Office REIT's shares and insiders 7.75%. The largest holder is Private Management Group Inc with 9.39% of the shares (5.4M), as of June 30, 2026. Among the top 20 institutions, 12 added shares and 6 reduced their stake in the latest filings. Short interest is 4.42% of the float, or 10.21 days of average trading volume. The share count fell 1.2% since 2019.
Related: ONL analyst forecast, ONL key metrics, ONL dividend history. See the ONL stock overview for the latest quote and news.
ONL ownership FAQ
Who owns the most Orion Office REIT stock?
The largest shareholders of Orion Office REIT are Private Management Group Inc (9.39%), BlackRock Inc (7.67%), Vanguard Capital Management, LLC (4.25%), Renaissance Technologies Corp (3.27%), Parkwood LLC (2.61%).
What percentage of Orion Office REIT is owned by institutions?
Institutions hold 60.0% of Orion Office REIT's shares outstanding; insiders hold 7.75%.
Which funds own Orion Office REIT?
The largest fund holders of Orion Office REIT are Vanguard MStar Total Stk Mkt Idx Invest (3.13%), iShares Russell 2000 ETF (2.22%), Fidelity Small Cap Index (1.04%), iShares Russell 2000 Value ETF (0.88%), Vanguard Russell 2000 ETF (0.54%).
What is Orion Office REIT's short interest?
2.5M shares of Orion Office REIT were sold short, 4.42% of the float; at the average daily volume it would take 10.21 days to cover.
Are insiders buying or selling Orion Office REIT?
Of the latest 1 reported insider transactions in Orion Office REIT (since August 27, 2025), 1 were purchases and 0 were sales.
How many shares of Orion Office REIT are outstanding?
Orion Office REIT has 57.0M shares outstanding, of which 49.7M are in the public float.