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Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

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
+8.29%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$114B
AUM Growth
+$21.9B
Cap. Flow
-$49.6M
Cap. Flow %
-0.04%
Top 10 Hldgs %
37.97%
Holding
10,803
New
1,536
Increased
3,663
Reduced
3,631
Closed
1,728

Top Buys

Rank Stock Value
1
WMT icon
Walmart Inc
WMT
+$43.6M
2
AAPL icon
Apple
AAPL
+$40.9M
3
OIH icon
VanEck Oil Services ETF
OIH
+$37.7M
4
C icon
Citigroup
C
+$34.2M
5
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$32.7M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$189M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$123M
3
NVDA icon
NVIDIA
NVDA
+$115M
4
TSLA icon
Tesla
TSLA
+$52M
5
META icon
Meta Platforms (Facebook)
META
+$49M

Sector Composition

Rank Sector Weight
1 Miscellaneous 98.51%
2 Technology 0.42%
3 Consumer Discretionary 0.2%
4 Healthcare 0.17%
5 Industrials 0.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
EPAC icon
9276
PUT
Enerpac Tool Group
EPAC
$1.9B
– –
-900
Closed -$22K
EPIX
9277
DELISTED
ESSA Pharma
EPIX
– –
-241
Closed -$708
EPD icon
9278
Enterprise Products Partners
EPD
$84.2B
– –
-129,623
Closed -$3.33M
EPSN icon
9279
Epsilon Energy
EPSN
$191M
– –
-1,195
Closed -$6.81K
EPV icon
9280
ProShares UltraShort FTSE Europe
EPV
$9.59M
– –
-2,314
Closed -$147K
VMRK
9281
Vivmark Residential
VMRK
$50.9B
– –
-10,060
Closed -$618K
EQWL icon
9282
Invesco S&P 100 Equal Weight ETF
EQWL
$2.86B
– –
-122
Closed -$9K
ERAS icon
9283
Erasca
ERAS
$5.65B
$0 ﹤0.01%
+36
New +$131
ERIE icon
9284
Erie Indemnity
ERIE
$13B
– –
-1,013
Closed -$251K
ERIE icon
9285
PUT
Erie Indemnity
ERIE
$13B
– –
-500
Closed -$124K
EMBJ
9286
Embraer S.A. ADS
EMBJ
$13.3B
– –
-175,629
Closed -$2.34M
ERO icon
9287
Ero Copper
ERO
$4.03B
– –
-5,180
Closed -$83.4K
ERY icon
9288
Direxion Daily Energy Bear 2X ETF
ERY
$38.4M
– –
-2,892
Closed -$84K
ESCA icon
9289
CALL
Escalade
ESCA
$286M
– –
-100
Closed -$1K
ESCA icon
9290
PUT
Escalade
ESCA
$286M
– –
-200
Closed -$2K
ESGE icon
9291
iShares ESG Aware MSCI EM ETF
ESGE
$7.1B
– –
-18
Closed –
ETD icon
9292
Ethan Allen Interiors
ETD
$547M
– –
-608
Closed -$17.3K
ETN icon
9293
Eaton
ETN
$164B
– –
-110
Closed -$18.3K
ETWO
9294
DELISTED
E2open Parent Holdings
ETWO
– –
-1,061
Closed -$6.41K
EVC icon
9295
Entravision Communication
EVC
$761M
– –
-431
Closed -$2.67K
EVC icon
9296
PUT
Entravision Communication
EVC
$761M
– –
-400
Closed -$1K
EVER icon
9297
PUT
EverQuote
EVER
$868M
– –
-1,700
Closed -$25K
EVGN icon
9298
Evogene
EVGN
$8.22M
$0 ﹤0.01%
68
– –
EVH icon
9299
Evolent Health
EVH
$475M
– –
-6,381
Closed -$202K
EVLV icon
9300
PUT
Evolv Technologies
EVLV
$918M
– –
-700
Closed -$1K
370 371
372
373 374

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Simplex Trading's Q1 2023 Portfolio in Review

As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.

Simplex Trading's Q1 2023 filing shows 1,536 new, 3,663 increased, 3,631 reduced and 1,728 closed positions. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M. The largest sale was Amazon, an estimated $189M.

By sector, the portfolio is most concentrated in Miscellaneous at 99% of assets, up from 98% a quarter earlier, followed by Technology and Consumer Discretionary.

  • Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
  • Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
  • Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
  • Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
  • Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
  • Simplex Trading opened 1,536 new positions and closed 1,728 in Q1 2023.
  • Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.

Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.