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 | |
|---|---|---|---|---|---|---|
|
IPFF
1601
PUT
DELISTED
iShares International Preferred Stock ETF
IPFF
| $1.4M | ﹤0.01% |
293
-1,563
| -84% | -$23.8K |
|
1602
PUT
Synchrony
SYF
$23.7B
| $1.4M | ﹤0.01% |
403
-787
| -66% | -$26.7K |
|
1603
PUT
Vornado Realty Trust
VNO
$7.47B
| $1.4M | ﹤0.01% |
218
+213
| +4,260% | +$14.3K |
|
|
INFO
1604
CALL
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $1.4M | ﹤0.01% |
219
-107
| -33% | -$6.14K |
|
|
S
1605
CALL
DELISTED
Sprint Corporation
S
| $1.4M | ﹤0.01% |
2,124
+1,669
| +367% | +$10.5K |
|
|
CY
1606
PUT
DELISTED
Cypress Semiconductor
CY
| $1.39M | ﹤0.01% |
627
+238
| +61% | +$4.32K |
|
1607
CALL
Editas Medicine
EDIT
$399M
| $1.39M | ﹤0.01% |
563
+384
| +215% | +$9.17K |
|
1608
PUT
Broadridge
BR
$17.2B
| $1.39M | ﹤0.01% |
109
-51
| -32% | -$6.14K |
|
|
EXAS
1609
DELISTED
Exact Sciences
EXAS
| $1.39M | ﹤0.01% |
+11,765
| New | +$1.19M |
|
1610
PUT
CenterPoint Energy
CNP
$29.1B
| $1.38M | ﹤0.01% |
483
-29
| -6% | -$865 |
|
1611
PUT
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $1.38M | ﹤0.01% |
1,398
+489
| +54% | +$23.1K |
|
1612
CALL
Ligand Pharmaceuticals
LGND
$6.02B
| $1.38M | ﹤0.01% |
194
-207
| -52% | -$15.2K |
|
|
AAN.A
1613
PUT
DELISTED
The Aaron's Company Inc Class A
AAN.A
| $1.38M | ﹤0.01% |
225
+86
| +62% | +$528K |
|
|
AMRN
1614
Amarin Corp
AMRN
$284M
| $1.38M | ﹤0.01% |
3,557
+481
| +16% | +$176K |
|
1615
KB Home
KBH
$3.48B
| $1.37M | ﹤0.01% |
53,404
-49,554
| -48% | -$1.28M |
|
1616
CALL
Progressive
PGR
$124B
| $1.37M | ﹤0.01% |
172
-443
| -72% | -$34.3K |
|
1617
CALL
Children's Place
PLCE
$53.6M
| $1.37M | ﹤0.01% |
144
+11
| +8% | +$1.12K |
|
1618
CALL
BorgWarner
BWA
$13.2B
| $1.37M | ﹤0.01% |
371
+211
| +132% | +$7.48K |
|
|
SGEN
1619
CALL
DELISTED
Seagen Inc. Common Stock
SGEN
| $1.37M | ﹤0.01% |
198
+133
| +205% | +$9.31K |
|
1620
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $1.37M | ﹤0.01% |
139
+61
| +78% | +$5.42K |
|
1621
PUT
Trane Technologies
TT
$106B
| $1.37M | ﹤0.01% |
108
+22
| +26% | +$2.63K |
|
1622
PUT
Myriad Genetics
MYGN
$530M
| $1.37M | ﹤0.01% |
492
+267
| +119% | +$7.54K |
|
|
CZR
1623
DELISTED
Caesars Entertainment Corporation
CZR
| $1.37M | ﹤0.01% |
+115,578
| New | +$1.09M |
|
1624
Ashland
ASH
$3.04B
| $1.36M | ﹤0.01% |
+17,071
| New | +$1.32M |
|
1625
NRG Energy
NRG
$29.8B
| $1.36M | ﹤0.01% |
38,872
+25,078
| +182% | +$945K |
|
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.