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REK · ProShares Short Real Estate ETF

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$15.82 +0.11 (+0.72%) At close · Sep 4

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →
Holders: 7
Total Value: $327,485
Total Shares: 19,029

Institutional Ownership Trend

24 quarters

Holder Concentration

Across 7 13F filers · Δ vs Sep 30, 2025
Top Holder
95.9%
Mar 2023 → Dec 2025 · range 34.0% – 95.9%
+53.6 pts
Top 5
100.0%
Mar 2023 → Dec 2025 · range 79.8% – 100.0%
+0.0 pts
Top 10
100.0%
Mar 2023 → Dec 2025 · range 97.1% – 100.0%
0.0 pts
HHI
9,214
Mar 2023 → Dec 2025 · range 1,935 – 9,214
Highly concentrated+6,288

Quarterly Activity

vs Sep 30, 2025
New
1
Increased
2
Decreased
0
Sold Out
4
Unchanged
4
Holder count: -3
Institutional value: -73.1%
Shares held: -74.2%

Top Buyers

vs Sep 30, 2025
Institution Added Now Holds Open
IMC-Chicago, LLC +2,200 18,257
SIMPLEX TRADING, LLC +292 509

Top Sellers

vs Sep 30, 2025
No qualifying movers this quarter.

Top New Positions

vs Sep 30, 2025
Institution Acquired Value (USD) Open
Sound Income Strategies, LLC 245 $4,216

Top Sold-Out Positions

vs Sep 30, 2025
Institution Previously Held Last Value (USD) Open
CITADEL ADVISORS LLC 31,100 $514,705
SUSQUEHANNA INTERNATIONAL GROUP, LLP 15,963 $264,187
JANE STREET GROUP, LLC 10,000 $165,500
Advisory Services Network, LLC 350 $5,792
Filter: New 1 Increased 2 Reduced 0 Sold out 4 Unchanged 4
Showing 7 of 7
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
IMC-Chicago, LLC REK $314,202 95.94% 18,257
SIMPLEX TRADING, LLC REK $8,759 2.67% 509
Sound Income Strategies, LLC REK $4,216 1.29% 245
TCTC Holdings, LLC REK $240 0.07% 14
MORGAN STANLEY REK $34 0.01% 2
UBS Group AG REK $17 0.01% 1
HUNTINGTON NATIONAL BANK REK $17 0.01% 1