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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
EB
9326
DELISTED
Eventbrite
EB
– –
-26,569
Closed -$118K
EB
9327
PUT
DELISTED
Eventbrite
EB
– –
-200
Closed -$890
ECPG icon
9328
CALL
Encore Capital Group
ECPG
$1.84B
– –
-1,500
Closed -$81.5K
EDV icon
9329
Vanguard World Funds Extended Duration ETF
EDV
$3.3B
– –
-16,843
Closed -$1.09M
EEFT icon
9330
Euronet Worldwide
EEFT
$2.94B
– –
-15,685
Closed -$1.12M
EEFT icon
9331
PUT
Euronet Worldwide
EEFT
$2.94B
– –
-17,000
Closed -$1.29M
EEM icon
9332
iShares MSCI Emerging Markets ETF
EEM
$28.6B
– –
-107,806
Closed -$5.9M
EFA icon
9333
iShares MSCI EAFE ETF
EFA
$76.1B
– –
-12,489
Closed -$1.2M
EFC
9334
Ellington Financial
EFC
$1.67B
– –
-3,415
Closed -$43.4K
EFX icon
9335
Equifax
EFX
$19.6B
– –
-1,587
Closed -$315K
EFXT
9336
CALL
Enerflex
EFXT
$2.91B
– –
-100
Closed -$1.54K
EG icon
9337
Everest Group
EG
$14.9B
– –
-757
Closed -$249K
EGBN icon
9338
Eagle Bancorp
EGBN
$842M
– –
-22,635
Closed -$564K
EGAN icon
9339
PUT
eGain
EGAN
$173M
– –
-700
Closed -$7.2K
EGHT icon
9340
8x8 Inc
EGHT
$228M
– –
-1,377
Closed -$2.82K
EGO icon
9341
Eldorado Gold
EGO
$8.33B
– –
-128,456
Closed -$5.23M
EIDO icon
9342
iShares MSCI Indonesia ETF
EIDO
$481M
– –
-274
Closed -$5.12K
EIG icon
9343
Employers Holdings
EIG
$903M
– –
-66
Closed -$2.85K
ELA icon
9344
CALL
Envela
ELA
$542M
– –
-100
Closed -$1.34K
ELA icon
9345
Envela
ELA
$542M
– –
-121
Closed -$1.62K
ELA icon
9346
PUT
Envela
ELA
$542M
– –
-500
Closed -$6.69K
ELAN icon
9347
Elanco Animal Health
ELAN
$12.4B
– –
-35,698
Closed -$873K
ELME
9348
CALL
Elme Communities
ELME
$131M
– –
-5,000
Closed -$87K
ELVN icon
9349
CALL
Enliven Therapeutics
ELVN
$3.77B
– –
-7,000
Closed -$108K
EMB icon
9350
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$14.9B
– –
-3,919
Closed -$377K
372 373
374
375 376

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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.