OMERS Administration Corp’s Mersana Therapeutics MRSN Stock Holding History

OMERS Administration Corp’s Portfolio MRSN Stock Details MRSN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-7,900	Closed	-$229K	–	1148
2025 Q4	$229K	Buy	+7,900	New	+$150K	﹤0.01%	885

Other funds holding MRSN

IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

OMERS Administration Corp's MRSN Position: Q1 2026 in Review

OMERS Administration Corp sold out of Mersana Therapeutics (MRSN) in Q1 2026, closing a stake of 7,900 shares — an estimated $229K sold.

OMERS Administration Corp first reported a position in MRSN in Q4 2025 and held it in 1 quarter. The position peaked at $229K in Q4 2025. 1 fund tracked by Wall St. Rank holds MRSN as of Q1 2026.

OMERS Administration Corp reported no remaining Mersana Therapeutics position as of Q1 2026 after selling out during the quarter.
OMERS Administration Corp sold 7,900 Mersana Therapeutics shares in Q1 2026, an estimated $229K.
OMERS Administration Corp first reported a position in Mersana Therapeutics in Q4 2025 and held it in 1 quarter.
OMERS Administration Corp's Mersana Therapeutics position peaked at $229K in Q4 2025.
1 fund tracked by Wall St. Rank held Mersana Therapeutics as of Q1 2026.

Based on OMERS Administration Corp's 13F filing for Q1 2026, filed 15 May 2026.