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
+14.57%
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
$45.7B
AUM Growth
+$10.6B
Cap. Flow
+$229M
Cap. Flow %
0.5%
Top 10 Hldgs %
38.52%
Holding
8,523
New
1,277
Increased
3,072
Reduced
2,710
Closed
1,251

Top Buys

Rank Stock Value
1
AAPL icon
Apple
AAPL
+$70.1M
2
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$46.6M
3
GOOG icon
Alphabet (Google) Class C
GOOG
+$37.4M
4
AMZN icon
Amazon
AMZN
+$37M
5
TSLA icon
Tesla
TSLA
+$28M

Top Sells

Rank Stock Value
1
BABA icon
Alibaba
BABA
+$41M
2
BA icon
Boeing
BA
+$27.8M
3
BIIB icon
Biogen
BIIB
+$18.9M
4
GLD icon
SPDR Gold Trust
GLD
+$18.3M
5
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$13.6M

Sector Composition

Rank Sector Weight
1 Technology 0.75%
2 Consumer Discretionary 0.58%
3 Communication Services 0.33%
4 Healthcare 0.31%
5 Industrials 0.19%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
GSAT icon
7526
Globalstar
GSAT
$10.2B
– –
-947
Closed -$5.73K
GSG icon
7527
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1.03B
– –
-6,092
Closed -$94.6K
GSG icon
7528
PUT
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1.03B
– –
-106
Closed -$159K
GSIT icon
7529
GSI Technology
GSIT
$233M
– –
-100
Closed –
GSM icon
7530
FerroAtlántica
GSM
$626M
– –
-1,203
Closed -$1K
GSM icon
7531
PUT
FerroAtlántica
GSM
$626M
– –
-10
Closed -$1K
GTN icon
7532
Gray Television
GTN
$400M
– –
-7,460
Closed -$139K
GTY
7533
Getty Realty Corp
GTY
$2.1B
– –
-4
Closed –
GTX icon
7534
Garrett Motion
GTX
$5.9B
$0 ﹤0.01%
39,247
+18,176
+86% +$185K
GUSH icon
7535
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$251M
– –
-129
Closed -$37.3K
GWW icon
7536
W.W. Grainger
GWW
$64.6B
– –
-1,526
Closed -$484K
GXC icon
7537
State Street SPDR S&P China ETF
GXC
$447M
$0 ﹤0.01%
+6
New +$576
HAE icon
7538
CALL
Haemonetics
HAE
$3.52B
– –
-350
Closed -$4.41M
HBIO icon
7539
CALL
Harvard Bioscience
HBIO
$27.9M
– –
-6
Closed -$18K
HCI icon
7540
HCI Group
HCI
$2.23B
– –
-271
Closed -$11.9K
HCKT icon
7541
CALL
Hackett Group
HCKT
$234M
– –
-26
Closed -$42K
HCKT icon
7542
PUT
Hackett Group
HCKT
$234M
– –
-14
Closed -$23K
HDSN
7543
Hudson Technologies
HDSN
$266M
– –
-200
Closed -$134
HEES
7544
DELISTED
H&E Equipment Services
HEES
– –
-1,657
Closed -$53.7K
HESM icon
7545
CALL
Hess Midstream
HESM
$5.2B
– –
-3
Closed -$5K
MCHB
7546
CALL
Mechanics Bancorp
MCHB
$3.53B
– –
-29
Closed -$79K
HP icon
7547
Helmerich & Payne
HP
$3.5B
– –
-10,818
Closed -$434K
HPP
7548
CALL
Hudson Pacific Properties
HPP
$807M
– –
-4
Closed -$83K
HPQ icon
7549
HP
HPQ
$22.4B
– –
-9,356
Closed -$177K
HQY icon
7550
HealthEquity
HQY
$7.89B
– –
-6,917
Closed -$432K
300 301
302
303 304

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 Q4 2019 Portfolio in Review

As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.

Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.

By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.

  • Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
  • Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
  • Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
  • Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
  • Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
  • Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
  • Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.

Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.