Jane Street’s Harbor Osmosis International Resource Efficient ETF EFFI Stock Holding History

Jane Street’s Portfolio EFFI Stock Details EFFI Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$390K	Sell	15,368 -3,547	-19%	-$88.7K	﹤0.01%	8598
2026 Q1	$449K	Buy	+18,915	New	+$463K	﹤0.01%	8314
2025 Q2	–	Sell	-24,823	Closed	-$499K	–	11264
2025 Q1	$499K	Buy	+24,823	New	+$497K	﹤0.01%	6865

Other funds holding EFFI

State of Wisconsin Investment Board Madison, Wisconsin $49.6B AUM 39.59% 1-Year Est. Return

GWP

Gateway Wealth Partners Appleton, Wisconsin $1.67B AUM 21.55% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

IAIM

International Assets Investment Management Orlando, Florida $1.67B AUM 28.26% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Jane Street's EFFI Position: Q2 2026 in Review

Jane Street reduced its Harbor Osmosis International Resource Efficient ETF (EFFI) stake by 19% in Q2 2026, selling an estimated $88.7K and leaving 15,368 shares worth $390K. The position accounts for ﹤0.01% of the portfolio, ranked #8598.

Jane Street first reported a position in EFFI in Q1 2025 and has held it in 3 quarters since. The position peaked at $499K in Q1 2025. 6 funds tracked by Wall St. Rank hold EFFI as of Q2 2026.

Jane Street held 15,368 shares of Harbor Osmosis International Resource Efficient ETF worth $390K as of Q2 2026.
Jane Street sold 3,547 Harbor Osmosis International Resource Efficient ETF shares in Q2 2026, an estimated $88.7K.
Harbor Osmosis International Resource Efficient ETF made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #8598 holding.
Jane Street first reported a position in Harbor Osmosis International Resource Efficient ETF in Q1 2025 and has held it in 3 quarters since.
Jane Street's Harbor Osmosis International Resource Efficient ETF position peaked at $499K in Q1 2025.
6 funds tracked by Wall St. Rank held Harbor Osmosis International Resource Efficient ETF as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.