Jane Street’s Harbor Osmosis Emerging Markets Resource Efficient ETF EFFE Stock Holding History

Jane Street’s Portfolio EFFE Stock Details EFFE Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$289K	Sell	12,632 -948	-7%	-$22.9K	﹤0.01%	9321
2025 Q4	$313K	Sell	13,580 -3,045	-18%	-$73.3K	﹤0.01%	8737
2025 Q3	$398K	Buy	16,625 +1,865	+13%	+$43.6K	﹤0.01%	8331
2025 Q2	$335K	Buy	14,760 +2,963	+25%	+$62.8K	﹤0.01%	7667
2025 Q1	$244K	Buy	+11,797	New	+$242K	﹤0.01%	8151

Other funds holding EFFE

State of Wisconsin Investment Board Madison, Wisconsin $43.7B AUM 27.76% 1-Year Est. Return

Jane Street's EFFE Position: Q1 2026 in Review

Jane Street reduced its Harbor Osmosis Emerging Markets Resource Efficient ETF (EFFE) stake by 7% in Q1 2026, selling an estimated $22.9K and leaving 12,632 shares worth $289K. The position accounts for ﹤0.01% of the portfolio, ranked #9321.

Jane Street first reported a position in EFFE in Q1 2025 and has held it in 5 quarters since. The position peaked at $398K in Q3 2025. 2 funds tracked by Wall St. Rank hold EFFE as of Q1 2026.

Jane Street held 12,632 shares of Harbor Osmosis Emerging Markets Resource Efficient ETF worth $289K as of Q1 2026.
Jane Street sold 948 Harbor Osmosis Emerging Markets Resource Efficient ETF shares in Q1 2026, an estimated $22.9K.
Harbor Osmosis Emerging Markets Resource Efficient ETF made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #9321 holding.
Jane Street first reported a position in Harbor Osmosis Emerging Markets Resource Efficient ETF in Q1 2025 and has held it in 5 quarters since.
Jane Street's Harbor Osmosis Emerging Markets Resource Efficient ETF position peaked at $398K in Q3 2025.
2 funds tracked by Wall St. Rank held Harbor Osmosis Emerging Markets Resource Efficient ETF as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.