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
+5.31%
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
$25.5B
AUM Growth
+$23.2B
Cap. Flow
+$226M
Cap. Flow %
0.89%
Top 10 Hldgs %
29.06%
Holding
8,400
New
2,282
Increased
2,314
Reduced
2,591
Closed
1,035

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$34.5M
2
MU icon
Micron Technology
MU
+$33.9M
3
BRK.B icon
Berkshire Hathaway Class B
BRK.B
+$30.8M
4
NVDA icon
NVIDIA
NVDA
+$23.5M
5
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$22.2M

Top Sells

Rank Stock Value
1
TWX
Time Warner Inc
TWX
+$34.8M
2
AMZN icon
Amazon
AMZN
+$31.2M
3
TSLA icon
Tesla
TSLA
+$17.6M
4
NFLX icon
Netflix
NFLX
+$15.5M
5
AMD icon
Advanced Micro Devices
AMD
+$12.9M

Sector Composition

Rank Sector Weight
1 Technology 1.23%
2 Consumer Discretionary 0.92%
3 Communication Services 0.73%
4 Financials 0.62%
5 Industrials 0.6%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
LH icon
7651
Labcorp
LH
$23.8B
– –
-1,312
Closed -$198K
LLY icon
7652
Eli Lilly
LLY
$1.05T
– –
-485
Closed -$39.8K
LNC icon
7653
Lincoln National
LNC
$7.81B
– –
-15,292
Closed -$1.05M
LNN icon
7654
Lindsay Corp
LNN
$1.16B
– –
-216
Closed -$20.3K
LNN icon
7655
PUT
Lindsay Corp
LNN
$1.16B
– –
-20
Closed -$1K
LNTH icon
7656
PUT
Lantheus
LNTH
$6.75B
– –
-15
Closed -$5K
LPLA icon
7657
LPL Financial
LPLA
$25.9B
– –
-3,490
Closed -$229K
LSCC icon
7658
Lattice Semiconductor
LSCC
$18.7B
– –
-10,962
Closed -$62.8K
LW icon
7659
Lamb Weston
LW
$6.83B
– –
-18,828
Closed -$1.23M
LZB icon
7660
La-Z-Boy
LZB
$1.54B
– –
-11,364
Closed -$349K
MAA icon
7661
Mid-America Apartment Communities
MAA
$15.4B
– –
-8,716
Closed -$813K
MAIN icon
7662
Main Street Capital
MAIN
$4.94B
– –
-16,375
Closed -$623K
MARA icon
7663
CALL
Marathon Digital Holdings
MARA
$4.9B
– –
-52
Closed -$2K
MARA icon
7664
Marathon Digital Holdings
MARA
$4.9B
– –
-2,065
Closed -$11.1K
MASI
7665
DELISTED
Masimo
MASI
– –
-1,498
Closed -$142K
MATV icon
7666
Mativ Holdings
MATV
$434M
– –
-4,518
Closed -$192K
MATV icon
7667
PUT
Mativ Holdings
MATV
$434M
– –
-13
Closed -$1K
MATW icon
7668
Matthews International
MATW
$840M
– –
-93
Closed -$4.96K
MBIN icon
7669
Merchants Bancorp
MBIN
$2.13B
– –
-1,637
Closed -$26.6K
MCHI icon
7670
iShares MSCI China ETF
MCHI
$6.03B
– –
-6,535
Closed -$448K
MCRI icon
7671
PUT
Monarch Casino & Resort
MCRI
$2.11B
– –
-59
Closed -$4K
MCY icon
7672
Mercury Insurance
MCY
$5.83B
– –
-1,339
Closed -$63.1K
MDT icon
7673
Medtronic
MDT
$105B
– –
-7,935
Closed -$663K
MED icon
7674
Medifast
MED
$105M
– –
-327
Closed -$41.8K
MEI icon
7675
Methode Electronics
MEI
$568M
– –
-779
Closed -$31.8K
305 306
307
308 309

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 Q2 2018 Portfolio in Review

As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.

Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.

By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.

  • Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
  • Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
  • Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
  • Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
  • Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
  • Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
  • Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.

Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.