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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
RC
9951
PUT
Ready Capital
RC
$278M
– –
-24,300
Closed -$53K
RCKT icon
9952
Rocket Pharmaceuticals
RCKT
$375M
– –
-42,495
Closed -$169K
RDN icon
9953
Radian Group
RDN
$5.17B
– –
-1,502
Closed -$50.4K
RDWR icon
9954
Radware
RDWR
$1.28B
– –
-1,544
Closed -$37.2K
REAL icon
9955
The RealReal
REAL
$1.39B
– –
-59,738
Closed -$756K
REE
9956
CALL
DELISTED
REE Automotive
REE
– –
-2,000
Closed -$1.47K
REGN icon
9957
Regeneron Pharmaceuticals
REGN
$70.5B
– –
-8,559
Closed -$6.55M
REK icon
9958
ProShares Short Real Estate
REK
$11.7M
– –
-509
Closed -$8.76K
REKR icon
9959
Rekor Systems
REKR
$86M
– –
-14,826
Closed -$15.9K
REM icon
9960
iShares Mortgage Real Estate ETF
REM
$551M
– –
-343
Closed -$7.61K
RES icon
9961
PUT
RPC Inc
RES
$1.3B
– –
-200
Closed -$1.09K
REVG
9962
CALL
DELISTED
REV Group
REVG
– –
-100
Closed -$6.08K
REVG
9963
DELISTED
REV Group
REVG
– –
-39
Closed -$2.37K
REX icon
9964
REX American Resources
REX
$1.52B
– –
-1,097
Closed -$35.5K
REZI icon
9965
PUT
Resideo Technologies
REZI
$5.38B
– –
-1,500
Closed -$52.7K
RGNX icon
9966
Regenxbio
RGNX
$557M
– –
-6,234
Closed -$65.5K
RGP icon
9967
CALL
Resources Connection
RGP
$152M
– –
-400
Closed -$2.02K
RH icon
9968
RH
RH
$3.48B
– –
-4,652
Closed -$848K
RHP icon
9969
Ryman Hospitality Properties
RHP
$8.2B
– –
-569
Closed -$54.6K
RIET icon
9970
Hoya Capital High Dividend Yield ETF
RIET
$109M
– –
-79
Closed -$733
RIG icon
9971
Transocean
RIG
$5.8B
– –
-448,107
Closed -$2.52M
RILY icon
9972
BRC Group Holdings
RILY
$276M
– –
-23,824
Closed -$178K
RIO icon
9973
Rio Tinto
RIO
$147B
– –
-16,600
Closed -$1.51M
RIVN icon
9974
Rivian
RIVN
$25.7B
– –
-215,942
Closed -$3.45M
RJF icon
9975
PUT
Raymond James Financial
RJF
$32.8B
– –
-3,500
Closed -$562K
397 398
399
400 401

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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.