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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
-2.07%
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
$35.2B
AUM Growth
-$1.49B
Cap. Flow
-$310M
Cap. Flow %
-0.88%
Top 10 Hldgs %
32.67%
Holding
8,410
New
1,312
Increased
3,129
Reduced
2,596
Closed
1,163

Top Buys

Rank Stock Value
1
BABA icon
Alibaba
BABA
+$50.3M
2
BA icon
Boeing
BA
+$24.3M
3
GLD icon
SPDR Gold Trust
GLD
+$18.3M
4
BIIB icon
Biogen
BIIB
+$15.9M
5
FDX icon
FedEx
FDX
+$15.1M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$60.3M
2
IWM icon
iShares Russell 2000 ETF
IWM
+$36.4M
3
NFLX icon
Netflix
NFLX
+$19M
4
XLI icon
State Street Industrial Select Sector SPDR ETF
XLI
+$17.3M
5
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$14.2M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 0.49%
2 Technology 0.48%
3 Healthcare 0.35%
4 Industrials 0.35%
5 Communication Services 0.21%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
NSIT icon
7676
PUT
Insight Enterprises
NSIT
$3.51B
– –
-12
Closed -$69K
NTWK icon
7677
CALL
NetSol Technologies
NTWK
$51.9M
– –
-12
Closed -$6K
NVMI
7678
Nova
NVMI
$14.3B
– –
-97
Closed -$2.76K
NVT icon
7679
nVent Electric
NVT
$25.6B
– –
-17
Closed -$382
NWPX icon
7680
PUT
NWPX Infrastructure Inc
NWPX
$1.28B
– –
-3
Closed -$7K
NXRT
7681
NexPoint Residential Trust
NXRT
$661M
– –
-519
Closed -$21K
O icon
7682
Realty Income
O
$60.2B
– –
-2,691
Closed -$189K
ODFL icon
7683
Old Dominion Freight Line
ODFL
$47.9B
– –
-3,621
Closed -$196K
ODP
7684
DELISTED
ODP
ODP
– –
-2,860
Closed -$49.3K
OFIX icon
7685
CALL
Orthofix Medical
OFIX
$444M
– –
-2
Closed -$10K
OFIX icon
7686
Orthofix Medical
OFIX
$444M
$0 ﹤0.01%
2
– –
OLED icon
7687
Universal Display
OLED
$3.7B
– –
-2,765
Closed -$553K
OLP
7688
CALL
One Liberty Properties
OLP
$543M
– –
-3
Closed -$8K
OLP
7689
One Liberty Properties
OLP
$543M
$0 ﹤0.01%
20
-1,510
-99% -$42.4K
OMER icon
7690
Omeros
OMER
$743M
– –
-766
Closed -$13.1K
OMEX icon
7691
Odyssey Marine Exploration
OMEX
$42.8M
– –
-2,314
Closed -$10.9K
ACH
7692
Accendra Health
ACH
$235M
– –
-3,924
Closed -$17.6K
OOMA icon
7693
Ooma
OOMA
$534M
– –
-939
Closed -$11K
OPI
7694
DELISTED
Office Properties Income Trust
OPI
$0 ﹤0.01%
5,414
-17,620
-76% -$492K
ORC
7695
CALL
Orchid Island Capital
ORC
$1.32B
– –
-7
Closed -$20K
ORA icon
7696
CALL
Ormat Technologies
ORA
$6.35B
– –
-9
Closed -$57K
ORLY icon
7697
O'Reilly Automotive
ORLY
$71.2B
– –
-41,295
Closed -$1.07M
ORMP icon
7698
CALL
Oramed Pharmaceuticals
ORMP
$170M
– –
-37
Closed -$13K
ORMP icon
7699
Oramed Pharmaceuticals
ORMP
$170M
– –
-1,775
Closed -$5.91K
OSUR icon
7700
OraSure Technologies
OSUR
$275M
– –
-1,130
Closed -$8.84K
306 307
308
309 310

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Simplex Trading's Q3 2019 Portfolio in Review

As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.

Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.

By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.

  • Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
  • Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
  • Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
  • Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
  • Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
  • Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
  • Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.

Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.