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 |
Amazon
AMZN
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3226
Bankunited
BKU
$3.36B
| $18K | ﹤0.01% |
+533
| New | +$17.9K |
|
3227
CALL
Compañía de Minas Buenaventura
BVN
$8.06B
| $18K | ﹤0.01% |
460
+302
| +191% | +$3.81K |
|
3228
CALL
Casey's General Stores
CASY
$31.6B
| $18K | ﹤0.01% |
+54
| New | +$5.74K |
|
3229
Chegg
CHGG
$110M
| $18K | ﹤0.01% |
1,219
-4,242
| -78% | -$60.4K |
|
3230
PUT
Clorox
CLX
$11.8B
| $18K | ﹤0.01% |
114
-226
| -66% | -$30.4K |
|
3231
CALL
Costamare
CMRE
$1.89B
| $18K | ﹤0.01% |
595
-1,167
| -66% | -$7.55K |
|
3232
PUT
Cooper Companies
COO
$13.7B
| $18K | ﹤0.01% |
344
+8
| +2% | +$489 |
|
3233
CALL
CareTrust REIT
CTRE
$10.1B
| $18K | ﹤0.01% |
+14
| New | +$262 |
|
3234
State Street SPDR Bloomberg Convertible Securities ETF
CWB
$5.57B
| $18K | ﹤0.01% |
371
+300
| +423% | +$15.2K |
|
3235
PUT
DHI Group
DHX
$164M
| $18K | ﹤0.01% |
510
+460
| +920% | +$1.05K |
|
3236
PUT
Euronet Worldwide
EEFT
$3.01B
| $18K | ﹤0.01% |
95
+80
| +533% | +$7.58K |
|
3237
PUT
Edison International
EIX
$30.3B
| $18K | ﹤0.01% |
243
-54
| -18% | -$4.27K |
|
3238
PUT
Eastman Chemical
EMN
$7.74B
| $18K | ﹤0.01% |
280
-166
| -37% | -$14.1K |
|
3239
PUT
Floor & Decor
FND
$5.99B
| $18K | ﹤0.01% |
187
-33
| -15% | -$1.23K |
|
3240
CALL
Fossil Group
FOSL
$249M
| $18K | ﹤0.01% |
337
+131
| +64% | +$1.23K |
|
3241
PUT
Hershey
HSY
$36.6B
| $18K | ﹤0.01% |
447
+118
| +36% | +$12.6K |
|
3242
CALL
Independence Realty Trust
IRT
$3.87B
| $18K | ﹤0.01% |
487
+94
| +24% | +$950 |
|
3243
PUT
KKR & Co
KKR
$91.3B
| $18K | ﹤0.01% |
303
-158
| -34% | -$3K |
|
3244
CALL
LG Display
LPL
$3.14B
| $18K | ﹤0.01% |
130
+98
| +306% | +$1.41K |
|
3245
Lattice Semiconductor
LSCC
$16.8B
| $18K | ﹤0.01% |
3,493
-8,410
| -71% | -$51.2K |
|
3246
CALL
Medifast
MED
$110M
| $18K | ﹤0.01% |
+38
| New | +$1.89K |
|
3247
PUT
MPLX
MPLX
$59.2B
| $18K | ﹤0.01% |
147
-120
| -45% | -$4.15K |
|
3248
PUT
Nokia
NOK
$51.8B
| $18K | ﹤0.01% |
233
+2
| +0.9% | +$12 |
|
3249
Insperity
NSP
$1.92B
| $18K | ﹤0.01% |
422
+204
| +94% | +$8.08K |
|
|
OBE
3250
Obsidian Energy
OBE
$660M
| $18K | ﹤0.01% |
2,472
-968
| -28% | -$7.17K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.