We are live on ! Find out more
Simplex Trading

Simplex Trading Portfolio holdings

AUM $149B
1-Year Est. Return 62.07%
 

Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.

This Fund
S&P 500
This Quarter Est. Return
+3.1%
1 Year Est. Return
+62.07%
3 Year Est. Return
+116.86%
5 Year Est. Return
+116.02%
10 Year Est. Return
+774.44%
AUM
$149B
AUM Growth
-$28.3B
Cap. Flow
-$18.1B
Cap. Flow %
-12.12%
Top 10 Hldgs %
51.08%
Holding
10,500
New
2,156
Increased
2,652
Reduced
3,926
Closed
1,574

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$168M
2
NVDA icon
NVIDIA
NVDA
+$141M
3
TSM icon
TSMC
TSM
+$121M
4
META icon
Meta Platforms (Facebook)
META
+$107M
5
GLD icon
SPDR Gold Trust
GLD
+$103M

Top Sells

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$174M
2
WDC icon
Western Digital
WDC
+$87.7M
3
AVGO icon
Broadcom
AVGO
+$62.2M
4
SOXL icon
Direxion Daily Semiconductor Bull 3X ETF
SOXL
+$52M
5
NFLX icon
Netflix
NFLX
+$44.6M

Sector Composition

Rank Sector Weight
1 Technology 0.62%
2 Communication Services 0.22%
3 Consumer Discretionary 0.21%
4 Healthcare 0.2%
5 Industrials 0.1%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
APPN icon
9001
Appian
APPN
$1.86B
– –
-849
Closed -$23K
ARCO icon
9002
Arcos Dorados Holdings
ARCO
$1.72B
– –
-70
Closed -$568
ARKB icon
9003
ARK 21Shares Bitcoin ETF
ARKB
$2.53B
– –
-19,029
Closed -$482K
ARKG icon
9004
ARK Genomic Revolution ETF
ARKG
$1.58B
– –
-34,278
Closed -$993K
ARIS
9005
Aris Mining
ARIS
$2.86B
– –
-46,747
Closed -$884K
ARR
9006
Armour Residential REIT
ARR
$2.03B
– –
-99,057
Closed -$1.75M
ASH icon
9007
CALL
Ashland
ASH
$3.14B
– –
-500
Closed -$29.3K
ASH icon
9008
Ashland
ASH
$3.14B
– –
-4,543
Closed -$269K
ASHR icon
9009
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.38B
– –
-220,929
Closed -$7.26M
ASLE icon
9010
PUT
AerSale
ASLE
$282M
– –
-300
Closed -$2.13K
ASMB icon
9011
PUT
Assembly Biosciences
ASMB
$497M
– –
-200
Closed -$6.8K
ASTE icon
9012
CALL
Astec Industries
ASTE
$1.24B
– –
-200
Closed -$8.66K
ASYS icon
9013
Amtech Systems
ASYS
$285M
– –
-681
Closed -$9.17K
ATAI icon
9014
AtaiBeckley Inc
ATAI
$2.64B
– –
-53,065
Closed -$200K
ATER icon
9015
Aterian
ATER
$11.1M
– –
-1,258
Closed -$874
ATHM icon
9016
CALL
Autohome
ATHM
$2.47B
– –
-100
Closed -$2.23K
ATI icon
9017
ATI
ATI
$25.4B
– –
-9,545
Closed -$1.33M
ATLO icon
9018
CALL
AMES National
ATLO
$262M
– –
-6,600
Closed -$152K
ATNI icon
9019
ATN International
ATNI
$352M
– –
-27
Closed -$615
ATNI icon
9020
PUT
ATN International
ATNI
$352M
– –
-100
Closed -$2.28K
ATO icon
9021
Atmos Energy
ATO
$29.6B
– –
-624
Closed -$110K
OPTU
9022
Optimum Communications Inc
OPTU
$326M
– –
-10,075
Closed -$15.8K
ATXS
9023
DELISTED
Astria Therapeutics
ATXS
– –
-3,257
Closed -$42.6K
ATXS
9024
PUT
DELISTED
Astria Therapeutics
ATXS
– –
-2,100
Closed -$27.5K
AUB icon
9025
CALL
Atlantic Union Bankshares
AUB
$6.13B
– –
-600
Closed -$21.2K
359 360
361
362 363

Similar funds

Mitsubishi UFJ Asset Management
Mitsubishi UFJ Asset Management Tokyo, Japan $149B AUM 24.71% 1-Year Est. Return
Creative Planning
Creative Planning Overland Park, Kansas $147B AUM 18.73% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $145B AUM 34.61% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $154B AUM 29.96% 1-Year Est. Return
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $155B AUM 29.93% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $156B AUM 27.51% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

Simplex Trading's Q1 2026 Portfolio in Review

As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.

Simplex Trading withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.

By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.

Against the trend, Simplex Trading opened a new position in Amazon worth $159M.

  • Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
  • Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
  • Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
  • Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
  • Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
  • Simplex Trading opened 2,156 new positions and closed 1,574 in Q1 2026.
  • Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.

Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.