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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
GNE icon
7351
PUT
Genie Energy
GNE
$408M
– –
-10
Closed -$8K
GNL icon
7352
Global Net Lease
GNL
$2.11B
– –
-6,504
Closed -$124K
GOGO icon
7353
Gogo Inc
GOGO
$385M
– –
-27,624
Closed -$134K
GOOD
7354
CALL
Gladstone Commercial Corp
GOOD
$635M
– –
-18
Closed -$37K
GOOGL icon
7355
Alphabet (Google) Class A
GOOGL
$4.14T
– –
-233,780
Closed -$13.5M
GPN icon
7356
Global Payments
GPN
$24.5B
– –
-678
Closed -$101K
GPRK icon
7357
PUT
GeoPark
GPRK
$750M
– –
-178
Closed -$306K
GPRO icon
7358
GoPro
GPRO
$351M
– –
-3,320
Closed -$21.1K
GRFS
7359
CALL
Grifois
GRFS
$5.31B
– –
-2
Closed -$4K
GREK
7360
Global X MSCI Greece ETF
GREK
$350M
– –
-3,319
Closed -$80K
GROW icon
7361
US Global Investors
GROW
$36.6M
– –
-104
Closed -$125
GRPN icon
7362
Groupon
GRPN
$767M
– –
-869
Closed -$61.3K
GSG icon
7363
CALL
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1.01B
– –
-2
Closed -$3K
GSHD icon
7364
CALL
Goosehead Insurance
GSHD
$1.55B
– –
-20
Closed -$55K
GSHD icon
7365
Goosehead Insurance
GSHD
$1.55B
– –
-439
Closed -$12K
GSHD icon
7366
PUT
Goosehead Insurance
GSHD
$1.55B
– –
-51
Closed -$142K
GSM icon
7367
CALL
FerroAtlántica
GSM
$873M
– –
-85
Closed -$17K
GT icon
7368
Goodyear
GT
$1.8B
– –
-16,936
Closed -$286K
GTLS
7369
DELISTED
Chart Industries
GTLS
– –
-1,079
Closed -$88.6K
GTY
7370
PUT
Getty Realty Corp
GTY
$2.01B
– –
-6
Closed -$19K
GYRE icon
7371
PUT
Gyre Therapeutics
GYRE
$727M
– –
-13
Closed -$79K
HAE icon
7372
CALL
Haemonetics
HAE
$4.68B
– –
-16
Closed -$139K
HAIN icon
7373
Hain Celestial
HAIN
$67.5M
– –
-17,150
Closed -$376K
HASI icon
7374
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.93B
– –
-3,275
Closed -$87K
HBM icon
7375
CALL
Hudbay
HBM
$12.2B
– –
-165
Closed -$117K
293 294
295
296 297

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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.