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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
+12.69%
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
$73.5B
AUM Growth
+$10.8B
Cap. Flow
-$1.16B
Cap. Flow %
-1.58%
Top 10 Hldgs %
42.78%
Holding
9,056
New
1,403
Increased
3,135
Reduced
3,122
Closed
1,191

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$102M
2
TSM icon
TSMC
TSM
+$27.8M
3
JPM icon
JPMorgan Chase
JPM
+$22.4M
4
BA icon
Boeing
BA
+$19.4M
5
XOM icon
ExxonMobil
XOM
+$14.7M

Top Sells

Rank Stock Value
1
GLD icon
SPDR Gold Trust
GLD
+$95.5M
2
QQQ icon
Invesco QQQ Trust
QQQ
+$79.6M
3
TSLA icon
Tesla
TSLA
+$75.3M
4
NVDA icon
NVIDIA
NVDA
+$51.6M
5
EFA icon
iShares MSCI EAFE ETF
EFA
+$40.5M

Sector Composition

Rank Sector Weight
1 Consumer Discretionary 0.53%
2 Technology 0.4%
3 Healthcare 0.22%
4 Financials 0.21%
5 Communication Services 0.18%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
COLD icon
7851
Americold
COLD
$4.09B
– –
-8,584
Closed -$324K
COLL icon
7852
Collegium Pharmaceutical
COLL
$1.14B
– –
-412
Closed -$7K
COLL icon
7853
PUT
Collegium Pharmaceutical
COLL
$1.14B
– –
-3
Closed -$5K
COST icon
7854
Costco
COST
$415B
– –
-14,128
Closed -$4.75M
CP icon
7855
Canadian Pacific Kansas City
CP
$82B
– –
-12,865
Closed -$734K
CPF icon
7856
Central Pacific Financial
CPF
$1.01B
$0 ﹤0.01%
+2
New +$30
CPRX
7857
DELISTED
Catalyst Pharmaceutical
CPRX
– –
-9,166
Closed -$35.8K
CPS icon
7858
CALL
Cooper-Standard Automotive
CPS
$504M
– –
-1
Closed -$1K
CPS icon
7859
Cooper-Standard Automotive
CPS
$504M
– –
-1,008
Closed -$14K
CPSS icon
7860
CALL
Consumer Portfolio Services
CPSS
$205M
– –
-14
Closed -$3K
CPSS icon
7861
Consumer Portfolio Services
CPSS
$205M
– –
-554
Closed -$1.8K
CRESY
7862
Cresud
CRESY
$794M
– –
-1,248
Closed -$4.07K
CRSP icon
7863
CRISPR Therapeutics
CRSP
$4.58B
– –
-5,082
Closed -$451K
CRVS icon
7864
Corvus Pharmaceuticals
CRVS
$1.1B
$0 ﹤0.01%
+117
New +$467
CSGP icon
7865
CoStar Group
CSGP
$11.3B
– –
-105,100
Closed -$8.38M
CSL icon
7866
Carlisle Companies
CSL
$13.6B
– –
-1,034
Closed -$127K
CTMX icon
7867
CytomX Therapeutics
CTMX
$705M
– –
-258
Closed -$2K
CTRA
7868
CALL
DELISTED
Coterra Energy
CTRA
– –
-1,539
Closed -$2.64M
CTRA
7869
DELISTED
Coterra Energy
CTRA
$0 ﹤0.01%
+13,867
New +$259K
CTRA
7870
PUT
DELISTED
Coterra Energy
CTRA
– –
-929
Closed -$1.6M
CTS icon
7871
CALL
CTS Corp
CTS
$1.72B
– –
-1
Closed -$2K
CUE icon
7872
Cue Biopharma
CUE
$135M
– –
-15
Closed -$8.64K
CUE icon
7873
PUT
Cue Biopharma
CUE
$135M
– –
0
– -$2K
CUZ icon
7874
PUT
Cousins Properties
CUZ
$5.29B
– –
-2
Closed -$5K
CVGW
7875
CALL
DELISTED
Calavo Growers
CVGW
– –
-31
Closed -$195K
313 314
315
316 317

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Simplex Trading's Q3 2020 Portfolio in Review

As of Q3 2020, Simplex Trading held 9,056 positions worth $73.5B, up 17% from $62.7B the previous quarter. Its ten largest holdings account for 43% of the portfolio.

Simplex Trading's Q3 2020 filing shows 1,403 new, 3,135 increased, 3,122 reduced and 1,191 closed positions. Its largest new stake was Goldman Sachs: 60,397 shares worth $12.1M. The largest sale was SPDR Gold Trust, an estimated $95.5M.

By sector, the portfolio is most concentrated in Consumer Discretionary at 0.53% of assets, up from 0.47% a quarter earlier, followed by Technology and Healthcare.

  • Simplex Trading's largest Q3 2020 buy was Goldman Sachs: 60,397 shares worth $12.1M.
  • Simplex Trading added most to Amazon in Q3 2020, an estimated $102M increase.
  • Simplex Trading's biggest Q3 2020 reduction was SPDR Gold Trust, cutting an estimated $95.5M.
  • Simplex Trading fully exited iShares MSCI EAFE ETF in Q3 2020, selling an estimated $40.5M.
  • Simplex Trading's ten largest holdings make up 43% of its $73.5B portfolio in Q3 2020.
  • Simplex Trading opened 1,403 new positions and closed 1,191 in Q3 2020.
  • Simplex Trading's portfolio value rose 17% quarter-over-quarter to $73.5B.

Based on Simplex Trading's 13F filing for Q3 2020, filed 14 Oct 2020.