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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
DE icon
7701
Deere & Co
DE
$165B
– –
-6,316
Closed -$999K
DECK icon
7702
Deckers Outdoor
DECK
$13.4B
– –
-32,250
Closed -$897K
DENN
7703
DELISTED
Denny's
DENN
– –
-9
Closed -$153
DFJ icon
7704
WisdomTree Japan SmallCap Dividend Fund
DFJ
$377M
– –
-100
Closed -$7K
DFS
7705
DELISTED
Discover Financial Services
DFS
– –
-4,891
Closed -$324K
DGII icon
7706
PUT
Digi International
DGII
$2.48B
– –
-111
Closed -$196K
KUST
7707
CALL
Kustom Entertainment Inc
KUST
$871K
– –
0
– -$8K
KUST
7708
Kustom Entertainment Inc
KUST
$871K
– –
0
– –
DHT icon
7709
DHT Holdings
DHT
$2.96B
– –
-80,019
Closed -$507K
DHX icon
7710
DHI Group
DHX
$163M
– –
-100
Closed -$268
DIG icon
7711
ProShares Ultra Energy
DIG
$70.4M
– –
-4,740
Closed -$151K
DIN icon
7712
Dine Brands
DIN
$428M
– –
-2,202
Closed -$160K
DIOD icon
7713
PUT
Diodes
DIOD
$4.26B
– –
-5
Closed -$28K
DLB icon
7714
Dolby
DLB
$4.65B
– –
-1,595
Closed -$105K
DLNG icon
7715
CALL
Dynagas LNG Partners
DLNG
$140M
– –
-23
Closed -$4K
DLTR icon
7716
Dollar Tree
DLTR
$22.6B
– –
-35,698
Closed -$3.04M
DNTH icon
7717
CALL
Dianthus Therapeutics
DNTH
$5.73B
– –
0
– -$1K
DNTH icon
7718
Dianthus Therapeutics
DNTH
$5.73B
$0 ﹤0.01%
5
-26
-84% -$4.82K
DOC icon
7719
Healthpeak Properties
DOC
$15.2B
– –
-3,997
Closed -$130K
DOG
7720
ProShares Short Dow30
DOG
$97.2M
– –
-361
Closed -$17K
DPZ icon
7721
Domino's
DPZ
$10.7B
– –
-9,935
Closed -$3.06M
DRN icon
7722
Direxion Daily Real Estate Bull 3X ETF
DRN
$48.3M
$0 ﹤0.01%
104
-75
-42% -$1.9K
DRRX
7723
PUT
DELISTED
DURECT Corp
DRRX
– –
-191
Closed -$726K
DUST icon
7724
Direxion Daily Gold Miners Index Bear 2X ETF
DUST
$72.8M
– –
-10
Closed -$141K
DX
7725
CALL
Dynex Capital
DX
$2.99B
– –
-1
Closed -$1K
307 308
309
310 311

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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.