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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2076
PUT
McCormick & Company Non-Voting
MKC
$13.4B
| $1.02M | ﹤0.01% |
120
-154
| -56% | -$12.7K |
|
|
CVM.WS
2077
PUT
DELISTED
Cel-Sci Corp Series S
CVM.WS
| $1.02M | ﹤0.01% |
1,113
+732
| +192% | +$670K |
|
|
XLNX
2078
DELISTED
Xilinx Inc
XLNX
| $1.02M | ﹤0.01% |
+10,411
| New | +$978K |
|
|
SHOE
2079
CALL
Shoe Station Group
SHOE
$395M
| $1.01M | ﹤0.01% |
544
+534
| +5,340% | +$9.44K |
|
2080
Cirrus Logic
CRUS
$6.74B
| $1.01M | ﹤0.01% |
+12,285
| New | +$832K |
|
2081
CALL
Prudential
PUK
$36.5B
| $1.01M | ﹤0.01% |
273
+257
| +1,606% | +$9.06K |
|
2082
Fortinet
FTNT
$112B
| $1.01M | ﹤0.01% |
+47,230
| New | +$889K |
|
2083
Cameco
CCJ
$38.3B
| $1.01M | ﹤0.01% |
+113,168
| New | +$1.05M |
|
2084
PUT
JB Hunt Transport Services
JBHT
$27.1B
| $1M | ﹤0.01% |
86
-169
| -66% | -$19.4K |
|
2085
CALL
Canadian National Railway
CNI
$78.3B
| $1M | ﹤0.01% |
111
+61
| +122% | +$5.48K |
|
2086
PUT
Oshkosh
OSK
$9.67B
| $1M | ﹤0.01% |
106
+86
| +430% | +$7.41K |
|
2087
PUT
Raymond James Financial
RJF
$32.5B
| $1M | ﹤0.01% |
168
+82
| +95% | +$4.73K |
|
2088
CALL
Assured Guaranty
AGO
$3.78B
| $1M | ﹤0.01% |
204
-132
| -39% | -$6.31K |
|
|
NBL
2089
CALL
DELISTED
Noble Energy, Inc.
NBL
| $998K | ﹤0.01% |
402
+299
| +290% | +$6.35K |
|
2090
Corteva
CTVA
$59.7B
| $997K | ﹤0.01% |
+33,742
| New | +$893K |
|
|
SRG
2091
CALL
Seritage Growth Properties
SRG
$130M
| $997K | ﹤0.01% |
249
+59
| +31% | +$2.5K |
|
2092
PUT
Talos Energy
TALO
$2.49B
| $997K | ﹤0.01% |
331
+330
| +33,000% | +$7.71K |
|
|
MTOR
2093
CALL
DELISTED
MERITOR, Inc.
MTOR
| $997K | ﹤0.01% |
381
+327
| +606% | +$7.38K |
|
|
CARB
2094
PUT
DELISTED
Carbonite Inc
CARB
| $997K | ﹤0.01% |
434
-104
| -19% | -$2.04K |
|
|
ZUO
2095
PUT
DELISTED
Zuora, Inc.
ZUO
| $995K | ﹤0.01% |
695
+395
| +132% | +$5.79K |
|
2096
PUT
Galicia Financial Group
GGAL
$7.92B
| $994K | ﹤0.01% |
613
-2,540
| -81% | -$33.6K |
|
|
2097
CALL
Talos Energy
TALO
$2.49B
| $994K | ﹤0.01% |
+330
| New | +$7.71K |
|
2098
PUT
Interactive Brokers
IBKR
$40.9B
| $993K | ﹤0.01% |
852
+68
| +9% | +$798 |
|
2099
PUT
Dave & Buster's
PLAY
$343M
| $992K | ﹤0.01% |
247
-94
| -28% | -$3.76K |
|
2100
CALL
RPM International
RPM
$13.7B
| $990K | ﹤0.01% |
129
+40
| +45% | +$2.9K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.