We are live on ! Find out more
Simplex Trading

Simplex Trading Portfolio holdings

AUM $171B
1-Year Est. Return 85%
 

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
-10.88%
1 Year Est. Return
+85%
3 Year Est. Return
+183.25%
5 Year Est. Return
+145.21%
10 Year Est. Return
+1,056.84%
AUM
$1.36B
AUM Growth
+$171M
Cap. Flow
-$47.8M
Cap. Flow %
-3.51%
Top 10 Hldgs %
15.2%
Holding
7,014
New
1,810
Increased
2,203
Reduced
1,391
Closed
1,420

Top Buys

Rank Stock Value
1
IWM icon
iShares Russell 2000 ETF
IWM
+$29.8M
2
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$17.1M
3
DIS icon
Walt Disney
DIS
+$14.8M
4
GILD icon
Gilead Sciences
GILD
+$11.8M
5
EEM icon
iShares MSCI Emerging Markets ETF
EEM
+$11.2M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$92.9M
2
AAPL icon
Apple
AAPL
+$22.5M
3
META icon
Meta Platforms (Facebook)
META
+$20.5M
4
IBM icon
IBM
IBM
+$12.7M
5
BIDU icon
Baidu
BIDU
+$10M

Sector Composition

Rank Sector Weight
1 Miscellaneous 65.37%
2 Healthcare 6.71%
3 Communication Services 4.77%
4 Technology 4.7%
5 Consumer Discretionary 4.67%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
NDLS icon
5951
CALL
Noodles & Co
NDLS
$85.4M
– –
-11
Closed -$58K
NEON icon
5952
CALL
Neonode
NEON
$15.5M
– –
-2
Closed -$1K
NEON icon
5953
Neonode
NEON
$15.5M
$0 ﹤0.01%
+6
New +$168
NEU icon
5954
CALL
NewMarket
NEU
$8.14B
– –
-13
Closed -$7K
NG icon
5955
NovaGold Resources
NG
$3.54B
– –
-1,862
Closed -$6.28K
NGL icon
5956
CALL
NGL Energy Partners
NGL
$2.22B
– –
-13
Closed -$1K
NI icon
5957
PUT
NiSource
NI
$19.8B
– –
-25
Closed -$1K
NKTR icon
5958
CALL
Nektar Therapeutics
NKTR
$2.53B
– –
-13
Closed -$12K
NMM icon
5959
CALL
Navios Maritime Partners
NMM
$2.62B
– –
-2
Closed -$3K
NMR icon
5960
CALL
Nomura Holdings
NMR
$31.1B
– –
-60
Closed -$11K
NNI icon
5961
Nelnet
NNI
$4.56B
$0 ﹤0.01%
28
-2,129
-99% -$83.8K
NNN icon
5962
PUT
NNN REIT
NNN
$8.57B
– –
-66
Closed -$3K
NOG icon
5963
CALL
Northern Oil and Gas
NOG
$2.76B
– –
-8
Closed -$1K
NOV icon
5964
NOV
NOV
$7.63B
– –
-8,611
Closed -$352K
NRT
5965
North European Oil Royalty Trust
NRT
$82.1M
– –
-568
Closed -$6K
NRT
5966
PUT
North European Oil Royalty Trust
NRT
$82.1M
– –
-10
Closed -$1K
NSA
5967
DELISTED
National Storage Affiliates Trust
NSA
$0 ﹤0.01%
+17
New +$218
NSIT icon
5968
CALL
Insight Enterprises
NSIT
$4.72B
– –
-6
Closed -$1K
NSP icon
5969
Insperity
NSP
$1.98B
– –
-22
Closed –
NTAP icon
5970
NetApp
NTAP
$36.5B
– –
-2,002
Closed -$61.8K
NTGR icon
5971
PUT
NETGEAR
NTGR
$579M
– –
-10
Closed -$2K
NTRS icon
5972
CALL
Northern Trust
NTRS
$34.1B
– –
-22
Closed -$14K
NTWK icon
5973
CALL
NetSol Technologies
NTWK
$48.5M
– –
-106
Closed -$27K
NUE icon
5974
Nucor
NUE
$59.2B
– –
-486
Closed -$20.8K
NUWE icon
5975
Nuwellis
NUWE
$2.48M
– –
0
– –
237 238
239
240 241

Similar funds

Creative Planning
Creative Planning Overland Park, Kansas $171B AUM 24.68% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
Jennison Associates
Jennison Associates New York $167B AUM 44.17% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $164B AUM 112.45% 1-Year Est. Return
California Public Employees Retirement System
California Public Employees Retirement System Sacramento, California $177B AUM 39.86% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $178B AUM 37.23% 1-Year Est. Return

Simplex Trading's Q3 2015 Portfolio in Review

As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.

Simplex Trading withdrew a net $47.8M in Q3 2015, closing 1,420 positions and reducing 1,391 holdings. Its most notable exit was IBM, an estimated $12.7M position sold in full.

By sector, the portfolio is most concentrated in Miscellaneous at 65% of assets, up from 42% a quarter earlier, followed by Healthcare and Communication Services.

Against the trend, Simplex Trading opened a new position in iShares Russell 2000 ETF worth $27.5M.

  • Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
  • Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
  • Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
  • Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
  • Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
  • Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
  • Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.

Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.