Mereo BioPharma Group plc - Depositary Receipt (Common Stock)
US ˙ NasdaqCM ˙ US5894921072

SecurityMREO / Mereo BioPharma Group plc - Depositary Receipt (Common Stock)
InstitutionState Street Corp
Latest Disclosed Ownership133,379 shares
Latest Disclosed Value $ 44,015
State Street Corp reports 2.09% increase in ownership of MREO / Mereo BioPharma Group plc - Depositary Receipt (Common Stock)

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 133,379 shares of Mereo BioPharma Group plc - Depositary Receipt (Common Stock) (US:MREO) valued at $44,015 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 130,643 shares of Mereo BioPharma Group plc - Depositary Receipt (Common Stock). This represents a change in shares of 2.09% during the quarter. The current value of the position is $41,774 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MEREO BIOPHARMA GROUP SPON ADS 589492107 133,379 2,736 2.09 44 -18.52 0.0000
2026-02-13 2025-12-31 13F MEREO BIOPHARMA GROUP SPON ADS 589492107 130,643 -2,058 -1.55 54 -80.22 0.0000
2025-11-14 2025-09-30 13F MEREO BIOPHARMA GROUP SPON ADS 589492107 132,701 87,759 195.27 273 125.62 0.0000
2025-08-14 2025-06-30 13F MEREO BIOPHARMA GROUP SPON ADS 589492107 44,942 -717 -1.57 122 18.63 0.0000
2025-05-15 2025-03-31 13F MEREO BIOPHARMA GROUP SPON ADS 589492107 45,659 -1,426 -3.03 103 -37.80 0.0000
2025-02-14 2024-12-31 13F MEREO BIOPHARMA GROUP SPON ADS 589492107 47,085 -476 -1.00 165 -15.90 0.0000
2024-11-14 2024-09-30 13F MEREO BIOPHARMA GROUP SPON ADS 589492107 47,561 47,561 195 0.0000
2022-08-15 2022-06-30 13F MEREO BIOPHARMA GROUP ADS 589492107 0 -412,768 -100.00 0 -100.00
2022-05-16 2022-03-31 13F MEREO BIOPHARMA GROUP ADS 589492107 412,768 0 0.00 458 -30.61 0.0000
2022-02-14 2021-12-31 13F MEREO BIOPHARMA GROUP ADS 589492107 412,768 0 0.00 660 -34.20 0.0000
2021-11-15 2021-09-30 13F MEREO BIOPHARMA GROUP ADS 589492107 412,768 334,568 427.84 1,003 304.44 0.0001
2021-08-16 2021-06-30 13F MEREO BIOPHARMA GROUP ADS 589492107 78,200 78,200 248 0.0000
2020-06-19 2020-03-31 13F/A-1 MEREO BIOPHARMA GROUP ADS 589492107 0 -16,516 -100.00 0 -100.00
2020-02-06 2019-12-31 13F MEREO BIOPHARMA GROUP ADS 589492107 16,516 0 0.00 54 12.50 0.0000
2019-11-14 2019-09-30 13F MEREO BIOPHARMA GROUP ADS 589492107 16,516 0 0.00 48 20.00 0.0000
2019-08-14 2019-06-30 13F MEREO BIOPHARMA GROUP ADS 589492107 16,516 16,516 40 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.