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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
WOW
10326
PUT
DELISTED
WideOpenWest
WOW
– –
-14,200
Closed -$142
WPRT
10327
CALL
Westport Fuel Systems
WPRT
$35.9M
– –
-500
Closed -$785
WPRT
10328
Westport Fuel Systems
WPRT
$35.9M
– –
-6,705
Closed -$13.4K
WRAP icon
10329
PUT
Wrap Technologies
WRAP
$105M
– –
-500
Closed -$1.19K
WRBY icon
10330
Warby Parker
WRBY
$3.02B
– –
-126,190
Closed -$3.13M
WSBC icon
10331
CALL
WesBanco
WSBC
$3.88B
– –
-3,100
Closed -$103K
WSFS icon
10332
CALL
WSFS Financial
WSFS
$4.14B
– –
-400
Closed -$22.1K
WYY icon
10333
CALL
WidePoint Corp
WYY
$120M
– –
-300
Closed -$1.61K
WYY icon
10334
WidePoint Corp
WYY
$120M
– –
-24,585
Closed -$132K
XBIT icon
10335
XBiotech
XBIT
$68.6M
– –
-67
Closed -$162
XLV icon
10336
State Street Health Care Select Sector SPDR ETF
XLV
$41.5B
– –
-28,657
Closed -$4.44M
XME icon
10337
State Street SPDR S&P Metals & Mining ETF
XME
$4.04B
– –
-43,012
Closed -$4.46M
XMTR icon
10338
Xometry
XMTR
$5.53B
– –
-319
Closed -$16.9K
XNCR icon
10339
Xencor
XNCR
$1.52B
– –
-6,460
Closed -$80.2K
XNCR icon
10340
PUT
Xencor
XNCR
$1.52B
– –
-600
Closed -$9.19K
XOMA
10341
DELISTED
Xoma
XOMA
– –
-173
Closed -$4.63K
XOM icon
10342
ExxonMobil
XOM
$629B
– –
-24,131
Closed -$3.52M
XOMO icon
10343
YieldMax XOM Option Income Strategy ETF
XOMO
$31.8M
– –
-6
Closed -$70
XPEL icon
10344
CALL
XPEL
XPEL
$1.2B
– –
-3,000
Closed -$150K
XPEL icon
10345
PUT
XPEL
XPEL
$1.2B
– –
-8,200
Closed -$409K
XPOF icon
10346
Xponential Fitness
XPOF
$263M
– –
-11,822
Closed -$85.4K
XPRO icon
10347
Expro Ltd
XPRO
$1.83B
– –
-81
Closed -$1.33K
XYLD icon
10348
Global X S&P 500 Covered Call ETF
XYLD
$3.21B
– –
-257
Closed -$10.4K
XYL icon
10349
Xylem
XYL
$28.7B
– –
-2,805
Closed -$368K
YCS icon
10350
ProShares UltraShort Yen
YCS
$34.2M
– –
-79
Closed -$4.02K
412 413
414
415 416

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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.