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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2126
Church & Dwight Co
CHD
$23.1B
| $855K | ﹤0.01% |
12,011
+4,901
| +69% | +$322K |
|
2127
CALL
O-I Glass
OI
$1.39B
| $855K | ﹤0.01% |
451
-55
| -11% | -$1.07K |
|
2128
PUT
ZTO Express
ZTO
$18.2B
| $855K | ﹤0.01% |
468
+398
| +569% | +$7.29K |
|
2129
CALL
Synaptics
SYNA
$4.41B
| $854K | ﹤0.01% |
215
-57
| -21% | -$2.25K |
|
2130
CALL
ABM Industries
ABM
$2.8B
| $850K | ﹤0.01% |
234
+229
| +4,580% | +$7.96K |
|
2131
PUT
Xerox
XRX
$337M
| $850K | ﹤0.01% |
266
-130
| -33% | -$3.67K |
|
|
GTT
2132
CALL
DELISTED
GTT Communications, Inc.
GTT
| $850K | ﹤0.01% |
245
+146
| +147% | +$4.29K |
|
2133
PUT
AppFolio
APPF
$5.85B
| $849K | ﹤0.01% |
107
+97
| +970% | +$6.49K |
|
|
SNV
2134
CALL
DELISTED
Synovus
SNV
| $848K | ﹤0.01% |
247
-10
| -4% | -$367 |
|
2135
CALL
Upland Software
UPLD
$12M
| $847K | ﹤0.01% |
+20
| New | +$6.8K |
|
|
ZGNX
2136
PUT
DELISTED
Zogenix, Inc.
ZGNX
| $847K | ﹤0.01% |
154
-68
| -31% | -$3.24K |
|
|
P
2137
Everpure Inc
P
$24.8B
| $846K | ﹤0.01% |
38,851
+21,630
| +126% | +$411K |
|
2138
PUT
Ryanair
RYAAY
$29.5B
| $846K | ﹤0.01% |
283
+255
| +911% | +$7.39K |
|
|
CLVS
2139
DELISTED
Clovis Oncology, Inc.
CLVS
| $846K | ﹤0.01% |
34,090
-48,221
| -59% | -$1.21M |
|
2140
PUT
HP
HPQ
$23.5B
| $845K | ﹤0.01% |
435
+330
| +314% | +$6.99K |
|
2141
iShares Expanded Tech-Software Sector ETF
IGV
$13B
| $844K | ﹤0.01% |
+20,025
| New | +$790K |
|
|
ESPR
2142
CALL
DELISTED
Esperion Therapeutics
ESPR
| $843K | ﹤0.01% |
210
-100
| -32% | -$4.49K |
|
2143
CALL
Genesis Energy
GEL
$1.84B
| $843K | ﹤0.01% |
362
+184
| +103% | +$3.98K |
|
|
RDFN
2144
PUT
DELISTED
Redfin
RDFN
| $843K | ﹤0.01% |
416
+335
| +414% | +$6.11K |
|
2145
CALL
Service Corp International
SCI
$11.4B
| $843K | ﹤0.01% |
210
-75
| -26% | -$3.13K |
|
2146
Invesco S&P 500 Low Volatility ETF
SPLV
$7.2B
| $842K | ﹤0.01% |
+16,007
| New | +$802K |
|
|
HEXO
2147
CALL
DELISTED
HEXO Corp. Common Shares
HEXO
| $841K | ﹤0.01% |
+23
| New | +$7.45K |
|
2148
PUT
Frontdoor
FTDR
$5.02B
| $839K | ﹤0.01% |
+244
| New | +$7.45K |
|
|
AMED
2149
CALL
DELISTED
Amedisys
AMED
| $838K | ﹤0.01% |
68
-4
| -6% | -$502 |
|
2150
PUT
Realty Income
O
$61.2B
| $838K | ﹤0.01% |
118
+63
| +115% | +$4.17K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.