13FBOX
OYSTER ENT · 13F Institutional Holdings
Options Calculator Rankings
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O

OYSTER ENT

OYSE
Institutions
72
Combined AUM (Q2 2026)
$259.2M
Combined Shares (Q2 2026)
47.6M
Overall Trend
Increase
All institutions combined
Basis: holder count and combined value / shares merge all share classes of the same company (e.g. Class A / C); each institution is counted once, and value & shares are the sum across classes.
📥 Inflow (Q1 2026→Q2 2026)
+1.5M
16 institutions added · 2 new buys
Est. buy amount
📤 Outflow (Q1 2026→Q2 2026)
-1.2M
12 institutions reduced · 0 exits
Est. sell amount
⚖️ Net Share Change
+354,557
Net Buy
💰 Est. Net Value
≈ —
est. price
Latest AUM (Q2 2026)
$259.2M
Institutions
72
New Buys
2
Adds
14
Reduces
12
Exits
0
Unchanged
44
Ownership TrendPortfolio %Prev Q %RankQ2 2026 ValueQ2 2026 SharesPrev Q ValuePrev Q SharesShares ChangeAction
GLAZER CAPITAL, LLC
0.4%0.34%#7$16.2M2.3M$15.9M2.3M+12,348+0.53%Add
Magnetar Financial LLC
0.12%0.14%#20$13.6M2.6M$13.4M2.6M00.00%Unchanged
Westchester Capital Management, LLC
0.66%0.61%#4$13.4M2.1M$13.4M2.1M00.00%Unchanged
D. E. Shaw & Co., Inc.
0.01%0.01%#51$12.9M1.3M$12.8M1.3M00.00%Unchanged
LINDEN ADVISORS LP
0.06%0.07%#29$12.0M2.2M$11.9M2.2M00.00%Unchanged
AQR Arbitrage LLC
0.16%0.19%#17$11.5M2.2M$11.3M2.2M+6,400+0.29%Add
LMR Partners LLP
0.04%0.02%#33$11.4M2.2M$11.3M2.2M00.00%Unchanged
PICTON MAHONEY ASSET MANAGEMENT
0.08%0.08%#23$10.5M1.8M$10.3M1.8M+15,000+0.83%Add
TENOR CAPITAL MANAGEMENT Co., L.P.
0.13%0.14%#19$9.4M1.8M$9.3M1.8M00.00%Unchanged
METEORA CAPITAL, LLC
0.77%0.92%#1$9.3M3.0M$12.4M3.5M-485,461-13.87%Reduce
Karpus Management, Inc.
0.24%0.21%#11$8.3M803,996$6.7M658,061+145,935+22.18%Add
TWO SIGMA INVESTMENTS, LP
0.01%0.01%#53$8.2M797,500$8.1M797,50000.00%Unchanged
MILLENNIUM MANAGEMENT LLC
<0.01%<0.01%#62$8.1M1.4M$7.9M1.4M+11+0.00%Add
Hudson Bay Capital Management LP
0.02%0.02%#41$7.2M1.2M$7.2M1.2M00.00%Unchanged
Radcliffe Capital Management, L.P.
0.49%0.48%#6$6.5M1.2M$6.4M1.2M+1+0.00%Add
MOORE CAPITAL MANAGEMENT, LP
0.08%0.1%#24$5.2M1.0M$5.1M1.0M00.00%Unchanged
RIVERNORTH CAPITAL MANAGEMENT, LLC
0.24%0.25%#12$5.0M974,872$4.9M974,87200.00%Unchanged
BERKLEY W R CORP
0.23%0.26%#13$4.9M475,872$4.9M703,894-228,022-32.39%Reduce
ARISTEIA CAPITAL, L.L.C.
0.06%0.1%#30$4.7M908,000$4.7M908,00000.00%Unchanged
MANGROVE PARTNERS IM, LLC
0.3%0.37%#10$4.6M450,000$4.6M450,00000.00%Unchanged
Polar Asset Management Partners Inc.
0.07%0.08%#28$4.2M826,400$4.1M799,900+26,500+3.31%Add
Alberta Investment Management Corp
0.02%0.02%#40$4.2M800,000$4.1M800,00000.00%Unchanged
DAVIDSON KEMPNER CAPITAL MANAGEMENT LP
0.05%0.06%#32$4.2M800,000$4.1M800,00000.00%Unchanged
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS
0.02%0.02%#44$3.7M750,000$3.6M350,000+400,000+114.29%Add
GOLDMAN SACHS GROUP INC
<0.01%<0.01%#64$3.6M346,312$3.5M346,31200.00%Unchanged
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
0.01%0.01%#54$3.6M790,000$3.5M790,00000.00%Unchanged
Bulldog Investors, LLP
0.73%0.75%#2$3.3M628,625$3.3M634,125-5,500-0.87%Reduce
Verition Fund Management LLC
<0.01%0.01%#57$3.1M872,877$3.2M1.1M-218,924-20.05%Reduce
TORONTO DOMINION BANK
<0.01%<0.01%#60$2.9M793,549$2.9M677,000+116,549+17.22%Add
Context Capital Management, LLC
0.05%0.06%#31$2.6M501,564$2.6M501,56400.00%Unchanged
GABELLI & Co INVESTMENT ADVISERS, INC.
0.38%0.38%#8$2.6M501,400$2.6M501,40000.00%Unchanged
WHITEBOX ADVISORS LLC
0.03%0.03%#37$2.6M500,000$2.6M500,00000.00%Unchanged
PERISCOPE CAPITAL INC.
0.22%0.28%#14$2.6M544,345$2.5M544,34500.00%Unchanged
Schonfeld Strategic Advisors LLC
0.01%0.02%#48$2.5M485,091$2.2M457,303+27,788+6.08%Add
Clear Street Group Inc.
0.01%0.01%#52$2.4M491,554$2.6M514,238-22,684-4.41%Reduce
Shaolin Capital Management LLC
0.16%0.17%#18$2.2M650,393$2.6M700,000-49,607-7.09%Reduce
WOLVERINE ASSET MANAGEMENT LLC
0.02%0.02%#42$2.2M214,698$2.2M217,108-2,410-1.11%Reduce
MYDA Advisors LLC
0.31%0.34%#9$2.1M548,000$2.1M548,00000.00%Unchanged
MMCAP International Inc. SPC
0.18%0.18%#16$2.1M400,000$2.1M400,00000.00%Unchanged
SONA ASSET MANAGEMENT (US) LLC
0.04%0.04%#34$1.8M623,344$1.8M173,344+450,000+259.60%Add
GABELLI FUNDS LLC
0.01%0.01%#47$1.8M373,600$2.1M398,600-25,000-6.27%Reduce
Mint Tower Capital Management B.V.
0.18%0.15%#15$1.6M300,000$1.5M300,00000.00%Unchanged
First Trust Capital Management L.P.
0.09%0.08%#22$1.5M150,000$1.5M150,00000.00%Unchanged
Calamos Advisors LLC
<0.01%<0.01%#56$1.3M246,186$1.3M123,093+123,093+100.00%Add
DLD Asset Management, LP
0.07%0.09%#26$1.0M206,130$1.0M206,13000.00%Unchanged
O'Connor Alternative Investments LLC
0.07%0.09%#27$1.0M100,000$1.0M100,00000.00%Unchanged
JPMORGAN CHASE & CO
<0.01%<0.01%#66$1.0M100,000$1.0M100,00000.00%Unchanged
L1 Global Manager Pty Ltd
0.73%0.68%#3$1.0M100,000$1.0M100,00000.00%Unchanged
Parallax Volatility Advisers, L.P.
<0.01%<0.01%#63$953,634234,143$737,629312,067-77,924-24.97%Reduce
683 Capital Management, LLC
0.04%0.04%#35$780,008150,000$772,133150,00000.00%Unchanged

🧭 Institutional Sector Flow Heatmap

Net Outflow Net Inflow