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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
GH icon
7801
Guardant Health
GH
$19.9B
– –
-11,504
Closed -$883K
GIS icon
7802
General Mills
GIS
$19B
– –
-35,080
Closed -$1.85M
GL icon
7803
Globe Life
GL
$13.3B
– –
-1,466
Closed -$138K
GLNG icon
7804
Golar LNG
GLNG
$5.07B
– –
-56,423
Closed -$619K
GLRE icon
7805
Greenlight Captial
GLRE
$542M
– –
-3,127
Closed -$26.9K
GLRE icon
7806
PUT
Greenlight Captial
GLRE
$542M
– –
-42
Closed -$42K
GMS
7807
PUT
DELISTED
GMS Inc
GMS
– –
-393
Closed -$1.06M
GNSS icon
7808
CALL
Genasys
GNSS
$76.1M
– –
-38
Closed -$12K
GNSS icon
7809
Genasys
GNSS
$76.1M
– –
-249
Closed –
GNTX icon
7810
Gentex
GNTX
$5.07B
– –
-25,292
Closed -$702K
GOEX icon
7811
Global X Gold Explorers ETF NEW
GOEX
$107M
– –
-100
Closed -$2K
B
7812
Barrick Mining
B
$62.3B
– –
-900
Closed -$16.9K
GOOG icon
7813
Alphabet (Google) Class C
GOOG
$3.88T
– –
-771,680
Closed -$51.6M
GOOGL icon
7814
Alphabet (Google) Class A
GOOGL
$3.88T
– –
-19,900
Closed -$1.35M
GPI icon
7815
Group 1 Automotive
GPI
$3.89B
– –
-332
Closed -$28K
GPRK icon
7816
GeoPark
GPRK
$666M
$0 ﹤0.01%
17
-1,009
-98% -$16.1K
GPRK icon
7817
PUT
GeoPark
GPRK
$666M
– –
-3
Closed -$6K
GRBK icon
7818
Green Brick Partners
GRBK
$3.06B
$0 ﹤0.01%
+55
New +$582
GROW icon
7819
US Global Investors
GROW
$36M
$0 ﹤0.01%
+849
New +$1.04K
GSAT icon
7820
PUT
Globalstar
GSAT
$10.2B
– –
-11
Closed -$8K
GTE icon
7821
CALL
Gran Tierra Energy
GTE
$272M
– –
-7
Closed -$9K
GTES icon
7822
CALL
Gates Industrial Corporation Ltd.
GTES
$6.84B
– –
-2
Closed -$2K
GTX icon
7823
Garrett Motion
GTX
$5.9B
$0 ﹤0.01%
65,259
+26,012
+66% +$189K
GURE
7824
Gulf Resources
GURE
$0 ﹤0.01%
+18
New +$632
GVA icon
7825
Granite Construction
GVA
$5.54B
– –
-4,658
Closed -$105K
311 312
313
314 315

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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.