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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
-6.21%
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
$56.7B
AUM Growth
+$11B
Cap. Flow
+$631M
Cap. Flow %
1.11%
Top 10 Hldgs %
50.41%
Holding
8,783
New
1,512
Increased
3,249
Reduced
2,705
Closed
1,159

Top Buys

Rank Stock Value
1
GLD icon
SPDR Gold Trust
GLD
+$31.6M
2
SLV icon
iShares Silver Trust
SLV
+$28.1M
3
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$25.1M
4
JPM icon
JPMorgan Chase
JPM
+$24.5M
5
JNUG icon
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
+$24M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$51.6M
2
AMZN icon
Amazon
AMZN
+$47.4M
3
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$44.7M
4
NFLX icon
Netflix
NFLX
+$38.3M
5
NVDA icon
NVIDIA
NVDA
+$31.1M

Sector Composition

Rank Sector Weight
1 Technology 0.49%
2 Healthcare 0.33%
3 Consumer Discretionary 0.32%
4 Financials 0.16%
5 Communication Services 0.16%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
FMC icon
7776
FMC
FMC
$1.46B
– –
-2,851
Closed -$265K
FNB icon
7777
FNB Corp
FNB
$6.72B
– –
-1,284
Closed -$13.6K
FNB icon
7778
PUT
FNB Corp
FNB
$6.72B
– –
-10
Closed -$12K
FOR icon
7779
PUT
Forestar Group
FOR
$1.42B
– –
-1
Closed -$2K
FOSL icon
7780
Fossil Group
FOSL
$236M
– –
-7,774
Closed -$45.8K
FRPT icon
7781
Freshpet
FRPT
$2.78B
– –
-2,929
Closed -$188K
FSLR icon
7782
First Solar
FSLR
$22.1B
– –
-7,401
Closed -$352K
FSS icon
7783
PUT
Federal Signal
FSS
$7.19B
– –
-14
Closed -$45K
FTEK icon
7784
Fuel Tech
FTEK
$49.9M
$0 ﹤0.01%
96
– –
FTI icon
7785
TechnipFMC
FTI
$30.3B
– –
-60,713
Closed -$666K
FTK icon
7786
Flotek Industries
FTK
$938M
– –
-1,831
Closed -$16.6K
FTK icon
7787
PUT
Flotek Industries
FTK
$938M
– –
-20
Closed -$24K
FTS icon
7788
Fortis
FTS
$29.8B
– –
-1,230
Closed -$50.4K
FUL icon
7789
H.B. Fuller
FUL
$2.96B
– –
-577
Closed -$24.2K
FULT icon
7790
Fulton Financial
FULT
$4.64B
– –
-443
Closed -$6.8K
FULT icon
7791
PUT
Fulton Financial
FULT
$4.64B
– –
-9
Closed -$15K
FUN icon
7792
Cedar Fair
FUN
$1.76B
– –
-1,935
Closed -$85K
GABC icon
7793
CALL
German American Bancorp
GABC
$1.79B
– –
-4
Closed -$14K
GASS icon
7794
StealthGas
GASS
$335M
$0 ﹤0.01%
237
-5,309
-96% -$14.8K
GATX icon
7795
GATX Corp
GATX
$6.51B
– –
-752
Closed -$54.7K
GD icon
7796
General Dynamics
GD
$103B
– –
-904
Closed -$150K
GDDY icon
7797
GoDaddy
GDDY
$11.6B
– –
-1,806
Closed -$120K
GDEN
7798
DELISTED
Golden Entertainment
GDEN
– –
-405
Closed -$6.18K
GDXJ icon
7799
VanEck Junior Gold Miners ETF
GDXJ
$7.05B
– –
-176,277
Closed -$7.45M
GEO icon
7800
The GEO Group
GEO
$4.15B
– –
-8,241
Closed -$126K
310 311
312
313 314

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Simplex Trading's Q1 2020 Portfolio in Review

As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.

Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.

By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
  • Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
  • Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
  • Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
  • Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
  • Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
  • Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.

Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.