Simplex Trading Portfolio holdings
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.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$29.6M |
| 2 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$22.6M |
| 3 |
iShares Russell 2000 ETF
IWM
|
+$17.9M |
| 4 |
Netflix
NFLX
|
+$17.1M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$13.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 2 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$40.6M |
| 3 |
Walt Disney
DIS
|
+$25.6M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$13.5M |
| 5 |
Johnson & Johnson
JNJ
|
+$11.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.5% |
| 2 | Communication Services | 0.5% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.3% |
| 5 | Consumer Discretionary | 0.26% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1701
PUT
C.H. Robinson
CHRW
$22B
| $1.26M | ﹤0.01% |
149
+128
| +610% | +$10.8K |
|
1702
CrowdStrike
CRWD
$187B
| $1.25M | ﹤0.01% |
+73,456
| New | +$1.25M |
|
|
NEWR
1703
PUT
DELISTED
New Relic, Inc.
NEWR
| $1.25M | ﹤0.01% |
145
+122
| +530% | +$12.1K |
|
|
CLR
1704
CALL
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $1.25M | ﹤0.01% |
298
+123
| +70% | +$5.26K |
|
1705
CALL
F5
FFIV
$22.1B
| $1.25M | ﹤0.01% |
86
-146
| -63% | -$21.9K |
|
1706
PUT
Brookfield
BN
$102B
| $1.25M | ﹤0.01% |
734
+529
| +258% | +$8.95K |
|
1707
CALL
Universal Health Services
UHS
$9.43B
| $1.25M | ﹤0.01% |
96
+45
| +88% | +$5.66K |
|
|
ANSS
1708
PUT
DELISTED
Ansys
ANSS
| $1.25M | ﹤0.01% |
61
-50
| -45% | -$9.53K |
|
|
BLD
1709
PUT
DELISTED
TopBuild
BLD
| $1.25M | ﹤0.01% |
151
+125
| +481% | +$9.56K |
|
1710
CALL
Cirrus Logic
CRUS
$6.74B
| $1.25M | ﹤0.01% |
286
+206
| +258% | +$8.95K |
|
1711
Chevron
CVX
$388B
| $1.25M | ﹤0.01% |
+10,044
| New | +$1.21M |
|
1712
CALL
Telecom Argentina
TEO
$5.89B
| $1.25M | ﹤0.01% |
707
+423
| +149% | +$6.45K |
|
1713
United States Oil Fund
USO
$2.45B
| $1.25M | ﹤0.01% |
+12,965
| New | +$1.29M |
|
|
ATH
1714
CALL
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $1.25M | ﹤0.01% |
290
-409
| -59% | -$17.7K |
|
1715
Arrowhead Research
ARWR
$12.1B
| $1.24M | ﹤0.01% |
46,978
+38,102
| +429% | +$836K |
|
1716
PUT
Verisk Analytics
VRSK
$26.4B
| $1.24M | ﹤0.01% |
85
-501
| -85% | -$70.7K |
|
1717
State Street SPDR S&P China ETF
GXC
$445M
| $1.24M | ﹤0.01% |
+13,010
| New | +$1.26M |
|
1718
CALL
HSBC
HSBC
$355B
| $1.24M | ﹤0.01% |
298
-324
| -52% | -$13.6K |
|
1719
PUT
Barclays
BCS
$94.1B
| $1.24M | ﹤0.01% |
1,667
+1,378
| +477% | +$10.9K |
|
|
TSG
1720
CALL
DELISTED
The Stars Group Inc.
TSG
| $1.23M | ﹤0.01% |
723
-250
| -26% | -$4.44K |
|
1721
PUT
STMicroelectronics
STM
$46B
| $1.23M | ﹤0.01% |
700
+480
| +218% | +$8.12K |
|
1722
Pampa Energía
PAM
$4.64B
| $1.23M | ﹤0.01% |
+35,509
| New | +$928K |
|
1723
iShares US Transportation ETF
IYT
$2.33B
| $1.23M | ﹤0.01% |
+26,100
| New | +$1.23M |
|
|
ARQL
1724
PUT
DELISTED
Arqule Inc
ARQL
| $1.23M | ﹤0.01% |
1,115
+295
| +36% | +$2.05K |
|
|
FTCH
1725
PUT
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $1.23M | ﹤0.01% |
589
-123
| -17% | -$2.84K |
|
Similar funds
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 1,301 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 Technology at 0.5% of assets, up from 0.42% a quarter earlier, followed by Communication Services and Healthcare.
- 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 1,301 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.