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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
EXAS
9376
DELISTED
Exact Sciences
EXAS
– –
-22,521
Closed -$2.32M
EXLS icon
9377
EXL Service
EXLS
$4.1B
– –
-155
Closed -$5.35K
EXPD icon
9378
Expeditors International
EXPD
$23.2B
– –
-8,617
Closed -$1.31M
AGNT
9379
PUT
AGNT Inc
AGNT
$703M
– –
-12,200
Closed -$110K
EYPT icon
9380
EyePoint Inc
EYPT
$1.06B
– –
-34,525
Closed -$516K
EZU icon
9381
iShare MSCI Eurozone ETF
EZU
$9.53B
– –
-546
Closed -$35K
F icon
9382
Ford
F
$57.5B
– –
-427,201
Closed -$5.63M
FA icon
9383
CALL
First Advantage
FA
$3.42B
– –
-100
Closed -$1.45K
FA icon
9384
First Advantage
FA
$3.42B
– –
-23
Closed -$334
FA icon
9385
PUT
First Advantage
FA
$3.42B
– –
-300
Closed -$4.36K
FARM
9386
CALL
DELISTED
Farmer Brothers
FARM
– –
-10,400
Closed -$15.2K
FBK icon
9387
CALL
FB Financial Corp
FBK
$2.94B
– –
-6,500
Closed -$363K
FC icon
9388
CALL
Franklin Covey
FC
$241M
– –
-3,700
Closed -$62.1K
FC icon
9389
PUT
Franklin Covey
FC
$241M
– –
-1,000
Closed -$16.8K
FCF icon
9390
CALL
First Commonwealth Financial
FCF
$2.12B
– –
-1,100
Closed -$18.5K
FCOM icon
9391
Fidelity MSCI Communication Services Index ETF
FCOM
$1.79B
– –
-360
Closed -$26.4K
FCOR icon
9392
CALL
Fidelity Corporate Bond ETF
FCOR
$353M
– –
-300
Closed -$13.8K
FDUS icon
9393
PUT
Fidus Investment
FDUS
$748M
– –
-1,000
Closed -$19.3K
FERG icon
9394
Ferguson
FERG
$44.5B
– –
-707
Closed -$172K
FF icon
9395
CALL
Future Fuel
FF
$214M
– –
-100
Closed -$319
FFIV icon
9396
F5
FFIV
$22.6B
– –
-9,503
Closed -$2.64M
FFTY icon
9397
CapForce IBD 50 ETF
FFTY
$81.7M
– –
-1,184
Closed -$41.2K
FHI icon
9398
CALL
Federated Hermes
FHI
$4.38B
– –
-1,400
Closed -$72.9K
FHTX icon
9399
PUT
Foghorn Therapeutics
FHTX
$306M
– –
-700
Closed -$3.78K
FISV
9400
Fiserv Inc
FISV
$26.8B
– –
-107,216
Closed -$6.63M
374 375
376
377 378

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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.