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MREO Institutional Ownership & 13F Holders | SmartMoneyDB

MREOMEREO BIOPHARMA GROUP PLC

SPON ADS · CUSIP 589492107

Smart Money Ownership

Of the 5 tracked institutions holding MREO, 2 have a 3-year clone track record — 2 of them beat the S&P. Average holder's clone alpha: +6.5pt. It's a gauge of who owns the name, not just how many.

Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →

MREO (MEREO BIOPHARMA GROUP PLC) Institutional Ownership Summary

Among the 5 tracked institutional investors we monitor, MREO (MEREO BIOPHARMA GROUP PLC) is held with a combined value of $327.58K across 952,608 shares. The largest holder is CITADEL ADVISORS LLC with a position worth $141.11K. CITADEL ADVISORS LLC opened a new position in the most recent quarter. 3 funds increased their holdings. 1 fund reduced its position.

Total Institutional Value

$327.58K

Total Shares Held

952,608

Institutional Holders

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

CITADEL ADVISORS LLCNew position~$141.1K TWO SIGMA ADVISERS, LP+4% shares~$4.0K RENAISSANCE TECHNOLOGIES LLC+8% shares~$1.2K STATE STREET CORP+1% shares~$423.931

Biggest Sellers

13F Institutional Holders

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CITADEL ADVISORS LLC

0.00% of bookNew

$141.11K

TWO SIGMA ADVISERS, LP

RENAISSANCE TECHNOLOGIES LLC

0.00% of book+7.6%

$16.55K

#	Fund	Value↓	Shares	Portfolio %	Change
1	CITADEL ADVISORS LLC	$141.11K	444,158	0.00%	New
2	TWO SIGMA ADVISERS, LP	$104.97K	251,900	0.00%	+4.0%
3	STATE STREET CORP	$42.82K	134,772	0.00%	+1.0%
4	BlackRock, Inc.	$22.14K	69,678	0.00%	-77.0%
5	RENAISSANCE TECHNOLOGIES LLC	$16.55K	52,100	0.00%	+7.6%

Activist & Large Holders (13D/13G)

Investor	Ownership	Type	Filed
EcoR1 Capital, LLC	0.6%	13G/A	2026-08-14

SEC Schedule 13D (activist) and 13G (passive) filings for MREO. Filed when an investor acquires 5%+ ownership.

Frequently Asked Questions

Which institutional investors own the most MREO stock?

As of the latest SEC 13F filings, CITADEL ADVISORS LLC is the largest institutional holder of MREO with a position worth $141.11K, representing 0.00% of their portfolio. In total, 5 institutional investors hold MREO with a combined value of $327.58K.

Are hedge funds buying or selling MREO?

In the most recent quarter, 1 fund opened a new position in MREO. Additionally, 3 increased their holdings and 1 reduced their positions.

What percentage of MREO is owned by institutional investors?

Institutional investors hold $327.58K worth of MREO stock across 5 positions. The largest institutional holder is CITADEL ADVISORS LLC with $141.11K in holdings.

What is a 13F filing and why does it matter for MREO?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For MREO, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track MREO institutional moves

Get notified when hedge funds change their MREO positions.