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 |
Alphabet (Google) Class C
GOOG
|
+$40.1M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.5M |
| 3 |
Alibaba
BABA
|
+$10.5M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 5 |
Intel
INTC
|
+$9.83M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$35.7M |
| 2 |
Gilead Sciences
GILD
|
+$32.3M |
| 3 |
Amazon
AMZN
|
+$29M |
| 4 |
Booking.com
BKNG
|
+$28.4M |
| 5 |
Baidu
BIDU
|
+$13.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 7.76% |
| 2 | Consumer Discretionary | 7.62% |
| 3 | Healthcare | 7.24% |
| 4 | Technology | 6.95% |
| 5 | Financials | 4.83% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
RESI
2201
DELISTED
Front Yard Residential Corporation Common Stock
RESI
| $24K | ﹤0.01% |
+1,155
| New | +$22.3K |
|
2202
PUT
Archer Daniels Midland
ADM
$41.4B
| $23K | ﹤0.01% |
+351
| New | +$16.7K |
|
2203
ASE Group
ASX
$80.8B
| $23K | ﹤0.01% |
+3,314
| New | +$23.1K |
|
2204
B&G Foods
BGS
$285M
| $23K | ﹤0.01% |
+805
| New | +$23.7K |
|
2205
CDW
CDW
$17.1B
| $23K | ﹤0.01% |
623
-261
| -30% | -$9.51K |
|
2206
CALL
Ciena
CIEN
$55.3B
| $23K | ﹤0.01% |
107
-79
| -42% | -$1.57K |
|
2207
PUT
Clean Energy Fuels
CLNE
$447M
| $23K | ﹤0.01% |
70
-50
| -42% | -$248 |
|
2208
CALL
Community Health Systems
CYH
$385M
| $23K | ﹤0.01% |
108
-35
| -24% | -$1.45K |
|
|
CYBR
2209
PUT
DELISTED
CyberArk
CYBR
| $23K | ﹤0.01% |
+59
| New | +$2.78K |
|
2210
CALL
Delek Logistics
DKL
$3.04B
| $23K | ﹤0.01% |
+64
| New | +$2.51K |
|
2211
PUT
Enterprise Products Partners
EPD
$83.8B
| $23K | ﹤0.01% |
205
-15
| -7% | -$503 |
|
2212
PUT
Eversource Energy
ES
$28.2B
| $23K | ﹤0.01% |
+65
| New | +$3.42K |
|
2213
CALL
Mohawk Industries
MHK
$6.9B
| $23K | ﹤0.01% |
17
+16
| +1,600% | +$2.77K |
|
2214
MSCI
MSCI
$40B
| $23K | ﹤0.01% |
+376
| New | +$21K |
|
2215
NGL Energy Partners
NGL
$1.94B
| $23K | ﹤0.01% |
+911
| New | +$25.7K |
|
2216
PUT
Nucor
NUE
$56.4B
| $23K | ﹤0.01% |
84
+44
| +110% | +$2.06K |
|
|
PDS
2217
Precision Drilling
PDS
$1.09B
| $23K | ﹤0.01% |
189
+188
| +18,800% | +$21.6K |
|
2218
CALL
Polaris
PII
$4.15B
| $23K | ﹤0.01% |
57
-31
| -35% | -$4.57K |
|
2219
CALL
Sarepta Therapeutics
SRPT
$1.66B
| $23K | ﹤0.01% |
203
-400
| -66% | -$5.33K |
|
2220
CALL
Texas Capital Bancshares
TCBI
$4.31B
| $23K | ﹤0.01% |
+101
| New | +$4.76K |
|
2221
PUT
Tenet Healthcare
THC
$20.1B
| $23K | ﹤0.01% |
155
+42
| +37% | +$1.96K |
|
2222
CALL
Textron
TXT
$16.6B
| $23K | ﹤0.01% |
89
-32
| -26% | -$1.39K |
|
2223
CALL
Vanguard FTSE Europe ETF
VGK
$30B
| $23K | ﹤0.01% |
144
+126
| +700% | +$6.79K |
|
2224
PUT
Vanguard S&P 500 ETF
VOO
$968B
| $23K | ﹤0.01% |
256
+39
| +18% | +$7.38K |
|
2225
Teucrium Wheat Fund
WEAT
$314M
| $23K | ﹤0.01% |
435
+253
| +139% | +$14.2K |
|
Similar funds
Simplex Trading's Q1 2015 Portfolio in Review
As of Q1 2015, Simplex Trading held 6,670 positions worth $860M, up 4.2% from $826M the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q1 2015 filing shows 1,973 new, 1,386 increased, 1,513 reduced and 1,643 closed positions. Its largest new stake was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M. The largest sale was Apple, an estimated $35.7M.
By sector, the portfolio is most concentrated in Communication Services at 7.8% of assets, up from 4.8% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q1 2015 buy was Alphabet (Google) Class C: 1,497,580 shares worth $41.4M.
- Simplex Trading added most to Alibaba in Q1 2015, an estimated $10.5M increase.
- Simplex Trading's biggest Q1 2015 reduction was Apple, cutting an estimated $35.7M.
- Simplex Trading fully exited Amazon in Q1 2015, selling an estimated $29M.
- Simplex Trading's ten largest holdings make up 15% of its $860M portfolio in Q1 2015.
- Simplex Trading opened 1,973 new positions and closed 1,643 in Q1 2015.
- Simplex Trading's portfolio value rose 4.2% quarter-over-quarter to $860M.
Based on Simplex Trading's 13F filing for Q1 2015, filed 21 Apr 2015.