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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
+2.11%
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
$36.6B
AUM Growth
+$674M
Cap. Flow
-$102M
Cap. Flow %
-0.28%
Top 10 Hldgs %
34.99%
Holding
8,406
New
1,261
Increased
2,604
Reduced
3,015
Closed
1,300

Top Buys

Rank Stock Value
1
NVDA icon
NVIDIA
NVDA
+$29.6M
2
XLI icon
State Street Industrial Select Sector SPDR ETF
XLI
+$22.6M
3
IWM icon
iShares Russell 2000 ETF
IWM
+$17.9M
4
NFLX icon
Netflix
NFLX
+$17.1M
5
TLT icon
iShares 20+ Year Treasury Bond ETF
TLT
+$13.4M

Top Sells

Rank Stock Value
1
QQQ icon
Invesco QQQ Trust
QQQ
+$123M
2
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$40.6M
3
DIS icon
Walt Disney
DIS
+$25.6M
4
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$13.5M
5
JNJ icon
Johnson & Johnson
JNJ
+$11.2M

Sector Composition

Rank Sector Weight
1 Miscellaneous 97.48%
2 Technology 0.51%
3 Communication Services 0.5%
4 Healthcare 0.37%
5 Industrials 0.31%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
EDIT icon
7251
Editas Medicine
EDIT
$496M
– –
-17,148
Closed -$409K
EDIV icon
7252
State Street SPDR S&P Emerging Markets Dividend ETF
EDIV
$1.24B
– –
-200
Closed -$6K
EEFT icon
7253
Euronet Worldwide
EEFT
$2.76B
– –
-1,807
Closed -$276K
EFA icon
7254
iShares MSCI EAFE ETF
EFA
$80.1B
– –
-67,982
Closed -$4.41M
EFX icon
7255
Equifax
EFX
$20.8B
– –
-3,847
Closed -$482K
EGBN icon
7256
CALL
Eagle Bancorp
EGBN
$859M
– –
-2
Closed -$10K
EGY icon
7257
CALL
Vaalco Energy
EGY
$631M
– –
-181
Closed -$40K
EHC icon
7258
Encompass Health
EHC
$12B
– –
-23,958
Closed -$1.16M
EMB icon
7259
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$14.6B
– –
-12,892
Closed -$1.42M
ENOV icon
7260
Enovis
ENOV
$1.07B
– –
-9,781
Closed -$471K
ENSG icon
7261
The Ensign Group
ENSG
$9.95B
– –
-480
Closed -$24K
EPOL icon
7262
iShares MSCI Poland ETF
EPOL
$862M
– –
-107
Closed -$2K
EQIX icon
7263
Equinix
EQIX
$102B
– –
-335
Closed -$161K
ERX icon
7264
Direxion Daily Energy Bull 2X ETF
ERX
$251M
– –
-7,295
Closed -$1.66M
ES icon
7265
Eversource Energy
ES
$26.8B
– –
-2,109
Closed -$154K
ESCA icon
7266
CALL
Escalade
ESCA
$287M
– –
-4
Closed -$4K
ESTC icon
7267
Elastic
ESTC
$9.64B
– –
-8,620
Closed -$704K
ETSY icon
7268
Etsy
ETSY
$7.02B
– –
-10,189
Closed -$665K
EVC icon
7269
Entravision Communication
EVC
$777M
– –
-116
Closed –
EWH icon
7270
iShares MSCI Hong Kong ETF
EWH
$1.2B
– –
-38,581
Closed -$1.01M
EWQ icon
7271
iShares MSCI France ETF
EWQ
$338M
– –
-190
Closed -$5K
EXK
7272
Endeavour Silver
EXK
$3.29B
– –
-9,240
Closed -$18.8K
EXLS icon
7273
CALL
EXL Service
EXLS
$5.55B
– –
-25
Closed -$30K
EXR icon
7274
Extra Space Storage
EXR
$29.4B
– –
-1,081
Closed -$114K
F icon
7275
Ford
F
$58.3B
– –
-131,055
Closed -$1.29M
289 290
291
292 293

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Simplex Trading's Q2 2019 Portfolio in Review

As of Q2 2019, Simplex Trading held 8,406 positions worth $36.6B, up 1.9% from $36B the previous quarter. Its ten largest holdings account for 35% of the portfolio.

Simplex Trading's Q2 2019 filing shows 1,261 new, 2,604 increased, 3,015 reduced and 1,300 closed positions. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M. The largest sale was Invesco QQQ Trust, an estimated $123M.

By sector, the portfolio is most concentrated in Miscellaneous at 97% of assets, up from 97% a quarter earlier, followed by Technology and Communication Services.

  • Simplex Trading's largest Q2 2019 buy was iShares 20+ Year Treasury Bond ETF: 105,724 shares worth $14M.
  • Simplex Trading added most to NVIDIA in Q2 2019, an estimated $29.6M increase.
  • Simplex Trading's biggest Q2 2019 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $40.6M.
  • Simplex Trading fully exited Invesco QQQ Trust in Q2 2019, selling an estimated $123M.
  • Simplex Trading's ten largest holdings make up 35% of its $36.6B portfolio in Q2 2019.
  • Simplex Trading opened 1,261 new positions and closed 1,300 in Q2 2019.
  • Simplex Trading's portfolio value rose 1.9% quarter-over-quarter to $36.6B.

Based on Simplex Trading's 13F filing for Q2 2019, filed 26 Jul 2019.