Jane Street’s Siebert Financial SIEB Stock Holding History

Jane Street’s Portfolio SIEB Stock Details SIEB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2021 Q4	–	Sell	-10,000	Closed	-$34K	–	10754
2021 Q3	$34K	Sell	10,000 -1,000	-9%	-$3.96K	﹤0.01%	9650
2021 Q2	$53K	Sell	11,000 -10,500	-49%	-$43.5K	﹤0.01%	9490
2021 Q1	$87K	Buy	+21,500	New	+$103K	﹤0.01%	8686

Other funds holding SIEB

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Cantor Fitzgerald New York $9.31B AUM 73.66% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Cetera Investment Advisers Schaumburg, Illinois $110B AUM 26.29% 1-Year Est. Return

Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Citadel Advisors Miami, Florida $875B AUM 40.89% 1-Year Est. Return

Jane Street's SIEB Position: Q2 2026 in Review

Jane Street opened a new position in Siebert Financial (SIEB) in Q2 2026: 55,771 shares worth $92K. The stake represents ﹤0.01% of the portfolio and ranks #10642 among its holdings. This is a return to the name: Jane Street previously reported a position in SIEB as recently as Q4 2025.

Jane Street first reported a position in SIEB in Q4 2024 and has held it in 4 quarters since. 47 funds tracked by Wall St. Rank hold SIEB as of Q2 2026.

Jane Street held 55,771 shares of Siebert Financial worth $92K as of Q2 2026.
Siebert Financial was a new Jane Street position in Q2 2026.
Siebert Financial made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #10642 holding.
Jane Street first reported a position in Siebert Financial in Q4 2024 and has held it in 4 quarters since.
47 funds tracked by Wall St. Rank held Siebert Financial as of Q2 2026.

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