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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
NINE
9801
PUT
DELISTED
Nine Energy Service
NINE
– –
-900
Closed -$311
NIO icon
9802
NIO
NIO
$11.7B
– –
-659,692
Closed -$3.33M
NIU
9803
PUT
Niu Technologies
NIU
$213M
– –
-4,100
Closed -$12.4K
NLOP
9804
Net Lease Office Properties
NLOP
$173M
– –
-185
Closed -$3.11K
NMFC icon
9805
New Mountain Finance
NMFC
$656M
– –
-17,727
Closed -$148K
NMFC icon
9806
PUT
New Mountain Finance
NMFC
$656M
– –
-800
Closed -$7.37K
NMR icon
9807
CALL
Nomura Holdings
NMR
$28.8B
– –
-600
Closed -$5.03K
NNBR icon
9808
NN Inc
NNBR
$266M
– –
-1,364
Closed -$2.05K
NNVC icon
9809
NanoViricides
NNVC
$36.3M
– –
-2,803
Closed -$2.93K
NOAH
9810
CALL
Noah Holdings
NOAH
$607M
– –
-200
Closed -$2.01K
NOK icon
9811
Nokia
NOK
$58B
– –
-30,054
Closed -$221K
NOTV
9812
PUT
DELISTED
Inotiv
NOTV
– –
-13,100
Closed -$7.36K
NRDS icon
9813
NerdWallet
NRDS
$588M
– –
-3,247
Closed -$36.6K
NRG icon
9814
NRG Energy
NRG
$28.9B
– –
-17,567
Closed -$2.76M
NRGV icon
9815
Energy Vault
NRGV
$616M
– –
-110,721
Closed -$457K
NSSC icon
9816
Napco Security Technologies
NSSC
$1.28B
– –
-3,376
Closed -$141K
NTR icon
9817
Nutrien
NTR
$33B
– –
-18,681
Closed -$1.33M
NTRS icon
9818
CALL
Northern Trust
NTRS
$32.9B
– –
-1,700
Closed -$232K
NTWK icon
9819
NetSol Technologies
NTWK
$52.6M
– –
-953
Closed -$3.18K
NUE icon
9820
Nucor
NUE
$53.7B
– –
-895
Closed -$156K
NVCT icon
9821
PUT
Nuvectis Pharma
NVCT
$608M
– –
-14,200
Closed -$107K
NVDQ icon
9822
T-Rex 2X Inverse NVIDIA Daily Target ETF
NVDQ
$20.2M
– –
-95
Closed -$1.6K
NVGS icon
9823
CALL
Navigator Holdings
NVGS
$1.31B
– –
-5,100
Closed -$88.3K
NVGS icon
9824
PUT
Navigator Holdings
NVGS
$1.31B
– –
-1,400
Closed -$24.2K
NVNO
9825
CALL
enVVeno Medical
NVNO
$6.78M
– –
-43
Closed -$481
391 392
393
394 395

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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.