We are live on ! Find out more
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
+17.83%
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
$36B
AUM Growth
+$1.89B
Cap. Flow
-$586M
Cap. Flow %
-1.63%
Top 10 Hldgs %
34.84%
Holding
8,479
New
1,472
Increased
3,049
Reduced
2,419
Closed
1,324

Top Buys

Rank Stock Value
1
QQQ icon
Invesco QQQ Trust
QQQ
+$86.9M
2
DIS icon
Walt Disney
DIS
+$25.5M
3
BIDU icon
Baidu
BIDU
+$12.3M
4
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$12.3M
5
RHT
Red Hat Inc
RHT
+$11.4M

Top Sells

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$66M
2
IWM icon
iShares Russell 2000 ETF
IWM
+$60.3M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$33.9M
4
AAPL icon
Apple
AAPL
+$21.1M
5
XLF icon
State Street Financial Select Sector SPDR ETF
XLF
+$18.2M

Sector Composition

Rank Sector Weight
1 Communication Services 0.58%
2 Technology 0.42%
3 Healthcare 0.34%
4 Consumer Discretionary 0.29%
5 Industrials 0.21%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
IBUY icon
6901
PUT
Amplify Online Retail ETF
IBUY
$106M
$1K ﹤0.01%
1
-6
-86% -$281
ICAD
6902
PUT
DELISTED
iCAD Inc
ICAD
$1K ﹤0.01%
3
-26
-90% -$126
JELD icon
6903
PUT
JELD-WEN Holding
JELD
$94.8M
$1K ﹤0.01%
1
– –
JOE icon
6904
St. Joe Company
JOE
$3.57B
$1K ﹤0.01%
+114
New +$1.75K
JOE icon
6905
PUT
St. Joe Company
JOE
$3.57B
$1K ﹤0.01%
1
-14
-93% -$215
KB icon
6906
KB Financial Group
KB
$41.2B
$1K ﹤0.01%
+31
New +$1.24K
TBHC
6907
PUT
DELISTED
The Brand House Collective
TBHC
$1K ﹤0.01%
+2
New +$20
KOPN icon
6908
CALL
Kopin
KOPN
$663M
$1K ﹤0.01%
14
-9
-39% -$12
KT icon
6909
PUT
KT
KT
$8.84B
$1K ﹤0.01%
+1
New +$14
KURA icon
6910
CALL
Kura Oncology
KURA
$922M
$1K ﹤0.01%
1
-13
-93% -$200
LAKE icon
6911
Lakeland Industries
LAKE
$106M
$1K ﹤0.01%
+100
New +$1.12K
LNTH icon
6912
Lantheus
LNTH
$6.82B
$1K ﹤0.01%
+41
New +$820
MARA icon
6913
CALL
Marathon Digital Holdings
MARA
$4.62B
$1K ﹤0.01%
+8
New +$16
MTRX icon
6914
CALL
Matrix Service
MTRX
$347M
$1K ﹤0.01%
+1
New +$20
MUFG icon
6915
CALL
Mitsubishi UFJ Financial
MUFG
$258B
$1K ﹤0.01%
4
+1
+33% +$5
NOG icon
6916
Northern Oil and Gas
NOG
$2.3B
$1K ﹤0.01%
50
-297
-86% -$7.42K
NTCT icon
6917
NETSCOUT
NTCT
$2.86B
$1K ﹤0.01%
+45
New +$1.2K
IMDX
6918
Insight Molecular Diagnostics
IMDX
$153M
$1K ﹤0.01%
+16
New +$1.03K
OI icon
6919
PUT
O-I Glass
OI
$1.39B
$1K ﹤0.01%
1
-195
-99% -$3.78K
OPCH icon
6920
Option Care Health
OPCH
$3.4B
$1K ﹤0.01%
+220
New +$2.89K
OR icon
6921
CALL
OR Royalties Inc
OR
$5.47B
$1K ﹤0.01%
+1
New +$10
PAHC icon
6922
PUT
Phibro Animal Health
PAHC
$1.38B
$1K ﹤0.01%
+1
New +$31
PBT
6923
Permian Basin Royalty Trust
PBT
$1.36B
$1K ﹤0.01%
+249
New +$1.81K
PDFS icon
6924
CALL
PDF Solutions
PDFS
$2.13B
$1K ﹤0.01%
+1
New +$11
PKE icon
6925
PUT
Park Aerospace
PKE
$745M
$1K ﹤0.01%
+1
New +$19
275 276
277
278 279

Similar funds

Mitsubishi UFJ Asset Management
Mitsubishi UFJ Asset Management Tokyo, Japan $149B AUM 24.71% 1-Year Est. Return
Creative Planning
Creative Planning Overland Park, Kansas $147B AUM 18.73% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $145B AUM 34.61% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $154B AUM 29.96% 1-Year Est. Return
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board Toronto Ontario, Ontario, Canada $155B AUM 29.93% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $156B AUM 27.51% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

Simplex Trading's Q1 2019 Portfolio in Review

As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.

Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.

By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.

  • Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
  • Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
  • Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
  • Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
  • Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
  • Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
  • Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.

Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.