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SIMPLEX TRADING, LLC

Position in MREO — Mereo BioPharma Group plc

CIK 1488542 CHICAGO, IL

Position in MREO

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$5,972
-$168,949 QoQ
Shares Held
18,780
-95.5% QoQ
Ownership
0.012%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
#34
of 58 holders
Holding Since
Mar 2021
17 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in MREO Over Time

Shares Held

Position Value (USD)

Position in Biotechnology

Healthcare · as of Jun 30, 2026

SIMPLEX TRADING, LLC holds $82,538,439 across 183 Biotechnology names. MREO ranks #149 (0.0% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in MREO

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17 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $5,972 18,780
2025-12-31 $174,921 419,477
2025-09-30 $404,314 196,269
2025-06-30 $545,092 201,141
2025-03-31 $9,263 4,117
2024-12-31 $192,846 55,099
2024-09-30 $139,144 33,855
2024-06-30 $149,014 41,393
2024-03-31 $96,498 29,242
2022-12-31 $4 6,190
2022-09-30 $1,603 1,862
2022-06-30 $79,504 70,986
2022-03-31 $1,130 1,009
2021-12-31 $177,732 111,083
2021-09-30 $27,619 11,413
2021-06-30 $52,415 16,535
2021-03-31 $24,867 7,379