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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
GPRE icon
7051
PUT
Green Plains
GPRE
$1.19B
$3K ﹤0.01%
8
-15
-65% -$162
GRWG icon
7052
CALL
GrowGeneration
GRWG
$82.9M
$3K ﹤0.01%
+9
New +$42
HBM icon
7053
PUT
Hudbay
HBM
$9.92B
$3K ﹤0.01%
21
+1
+5% +$3
HWC icon
7054
CALL
Hancock Whitney
HWC
$6.13B
$3K ﹤0.01%
2
-423
-100% -$14.6K
IBP icon
7055
PUT
Installed Building Products
IBP
$6.13B
$3K ﹤0.01%
1
– –
IDT icon
7056
IDT Corp
IDT
$1.6B
$3K ﹤0.01%
+729
New +$5.21K
IIIN icon
7057
Insteel Industries
IIIN
$633M
$3K ﹤0.01%
297
+179
+152% +$3.55K
IMNN icon
7058
CALL
Imunon
IMNN
$6.35M
– –
0
– –
LAB icon
7059
Standard BioTools
LAB
$326M
$3K ﹤0.01%
1,542
-4,352
-74% -$14.3K
LILA icon
7060
Liberty Latin America Class A
LILA
$1.51B
$3K ﹤0.01%
+540
New +$5.43K
LPG icon
7061
Dorian LPG
LPG
$1.94B
$3K ﹤0.01%
+377
New +$4.45K
LRMR icon
7062
CALL
Larimar Therapeutics
LRMR
$416M
$3K ﹤0.01%
+4
New +$53
LSTA icon
7063
PUT
Lisata Therapeutics
LSTA
$15.2M
$3K ﹤0.01%
1
– –
MAS icon
7064
Masco
MAS
$16B
$3K ﹤0.01%
100
-11,005
-99% -$481K
MATX icon
7065
Matsons
MATX
$6.37B
$3K ﹤0.01%
+117
New +$4.14K
MCRB icon
7066
CALL
Seres Therapeutics
MCRB
$48M
$3K ﹤0.01%
+1
New +$67
MFIN icon
7067
CALL
Medallion Financial
MFIN
$226M
$3K ﹤0.01%
18
-61
-77% -$339
NPO icon
7068
CALL
Enpro
NPO
$7.05B
$3K ﹤0.01%
+1
New +$55
NSIT icon
7069
Insight Enterprises
NSIT
$3.55B
$3K ﹤0.01%
75
-485
-87% -$28.1K
NX icon
7070
PUT
Quanex
NX
$854M
$3K ﹤0.01%
3
-3
-50% -$48
IMDX
7071
Insight Molecular Diagnostics
IMDX
$153M
$3K ﹤0.01%
63
-90
-59% -$4.41K
PBPB
7072
PUT
DELISTED
Potbelly
PBPB
$3K ﹤0.01%
11
-3
-21% -$12
PKX icon
7073
POSCO
PKX
$15.8B
$3K ﹤0.01%
114
+35
+44% +$1.49K
PSO icon
7074
PUT
Pearson
PSO
$9.78B
$3K ﹤0.01%
5
– –
PUMP icon
7075
CALL
ProPetro Holding
PUMP
$1.45B
$3K ﹤0.01%
13
+8
+160% +$64
281 282
283
284 285

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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.