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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
-6.21%
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
$56.7B
AUM Growth
+$11B
Cap. Flow
+$631M
Cap. Flow %
1.11%
Top 10 Hldgs %
50.41%
Holding
8,783
New
1,512
Increased
3,249
Reduced
2,705
Closed
1,159

Top Buys

Rank Stock Value
1
GLD icon
SPDR Gold Trust
GLD
+$31.6M
2
SLV icon
iShares Silver Trust
SLV
+$28.1M
3
DIA icon
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
+$25.1M
4
JPM icon
JPMorgan Chase
JPM
+$24.5M
5
JNUG icon
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
+$24M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$51.6M
2
AMZN icon
Amazon
AMZN
+$47.4M
3
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$44.7M
4
NFLX icon
Netflix
NFLX
+$38.3M
5
NVDA icon
NVIDIA
NVDA
+$31.1M

Sector Composition

Rank Sector Weight
1 Technology 0.49%
2 Healthcare 0.33%
3 Consumer Discretionary 0.32%
4 Financials 0.16%
5 Communication Services 0.16%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CELH icon
7626
CALL
Celsius Holdings
CELH
$6.95B
– –
-24
Closed -$3K
CENTA icon
7627
CALL
Central Garden & Pet Co Class A
CENTA
$2.36B
– –
-46
Closed -$114K
CEVA icon
7628
CEVA Inc
CEVA
$1.08B
– –
-2,483
Closed -$68.9K
CEVA icon
7629
PUT
CEVA Inc
CEVA
$1.08B
– –
-1
Closed -$2K
CFFN icon
7630
CALL
Capitol Federal Financial
CFFN
$1.06B
– –
-2
Closed -$2K
CFR icon
7631
Cullen/Frost Bankers
CFR
$10.1B
– –
-2,085
Closed -$170K
CHCO icon
7632
CALL
City Holding Co
CHCO
$1.94B
– –
-39
Closed -$319K
CHCO icon
7633
PUT
City Holding Co
CHCO
$1.94B
– –
-43
Closed -$352K
CHE icon
7634
Chemed
CHE
$6.68B
– –
-138
Closed -$61.6K
CHH icon
7635
CALL
Choice Hotels
CHH
$4.91B
– –
-2
Closed -$20K
CHT icon
7636
CALL
Chunghwa Telecom
CHT
$32.9B
– –
-1
Closed -$3K
CHT icon
7637
PUT
Chunghwa Telecom
CHT
$32.9B
– –
-1
Closed -$3K
CHTR icon
7638
Charter Communications
CHTR
$15.6B
– –
-17,215
Closed -$8.42M
CIA icon
7639
CALL
Citizens
CIA
$249M
– –
-10
Closed -$6K
CIEN icon
7640
Ciena
CIEN
$57.7B
– –
-7,012
Closed -$288K
CIM
7641
Chimera Investment
CIM
$1.03B
– –
-3,228
Closed -$183K
CINF icon
7642
Cincinnati Financial
CINF
$27.7B
– –
-504
Closed -$50.2K
CL icon
7643
Colgate-Palmolive
CL
$72.1B
– –
-41,315
Closed -$2.91M
CLDX icon
7644
Celldex Therapeutics
CLDX
$2.78B
– –
-13,705
Closed -$31K
CLF icon
7645
Cleveland-Cliffs
CLF
$6.25B
– –
-97,461
Closed -$613K
CLFD icon
7646
CALL
Clearfield
CLFD
$414M
– –
-63
Closed -$87K
CLFD icon
7647
Clearfield
CLFD
$414M
– –
-100
Closed -$1K
CLH icon
7648
Clean Harbors
CLH
$16.2B
– –
-1,312
Closed -$95.8K
CLS icon
7649
CALL
Celestica
CLS
$38.5B
– –
-5
Closed -$4K
CLSD
7650
PUT
DELISTED
Clearside Biomedical
CLSD
– –
-22
Closed -$97K
304 305
306
307 308

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Simplex Trading's Q1 2020 Portfolio in Review

As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.

Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.

By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.

  • Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
  • Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
  • Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
  • Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
  • Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
  • Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
  • Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.

Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.