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 | |
|---|---|---|---|---|---|---|
3151
CALL
CNO Financial Group
CNO
$4.97B
| $20K | ﹤0.01% |
+182
| New | +$4.07K |
|
3152
CALL
Criteo
CRTO
$1.06B
| $20K | ﹤0.01% |
175
+78
| +80% | +$3.72K |
|
3153
PUT
Franco-Nevada
FNV
$41.5B
| $20K | ﹤0.01% |
210
+105
| +100% | +$8.07K |
|
3154
PUT
Gen Digital
GEN
$16.1B
| $20K | ﹤0.01% |
739
-254
| -26% | -$7.74K |
|
3155
CALL
Groupon
GRPN
$1.06B
| $20K | ﹤0.01% |
12
-20
| -63% | -$1.65K |
|
|
HBI
3156
PUT
DELISTED
Hanesbrands
HBI
| $20K | ﹤0.01% |
277
-379
| -58% | -$9.09K |
|
3157
CALL
Huntington Ingalls Industries
HII
$11.3B
| $20K | ﹤0.01% |
+10
| New | +$2.08K |
|
3158
CALL
Lamb Weston
LW
$7.31B
| $20K | ﹤0.01% |
147
+61
| +71% | +$2.74K |
|
3159
PUT
Methanex
MEOH
$4.2B
| $20K | ﹤0.01% |
240
-32
| -12% | -$1.51K |
|
3160
MidCap Financial Investment
MFIC
$792M
| $20K | ﹤0.01% |
1,144
-615
| -35% | -$11.4K |
|
3161
PUT
Monster Beverage
MNST
$93.2B
| $20K | ﹤0.01% |
602
-68
| -10% | -$1.83K |
|
3162
CALL
National Health Investors
NHI
$3.85B
| $20K | ﹤0.01% |
163
-185
| -53% | -$14.5K |
|
3163
PUT
Global X MSCI Norway ETF
NORW
$84.9M
| $20K | ﹤0.01% |
991
+377
| +61% | +$8.87K |
|
3164
CALL
Public Service Enterprise Group
PEG
$39.4B
| $20K | ﹤0.01% |
143
+112
| +361% | +$5.07K |
|
3165
CALL
Pool Corp
POOL
$6.76B
| $20K | ﹤0.01% |
+46
| New | +$4.97K |
|
|
RDFN
3166
CALL
DELISTED
Redfin
RDFN
| $20K | ﹤0.01% |
+138
| New | +$3.55K |
|
3167
PUT
Regency Centers
REG
$15.1B
| $20K | ﹤0.01% |
268
+199
| +288% | +$12.8K |
|
3168
CALL
Reliance Steel & Aluminium
RS
$20.7B
| $20K | ﹤0.01% |
137
+112
| +448% | +$8.18K |
|
3169
CALL
SM Energy
SM
$7.4B
| $20K | ﹤0.01% |
311
+43
| +16% | +$672 |
|
3170
PUT
Teekay
TK
$975M
| $20K | ﹤0.01% |
437
+164
| +60% | +$1.44K |
|
3171
PUT
Toro Company
TTC
$9.02B
| $20K | ﹤0.01% |
50
-41
| -45% | -$2.75K |
|
3172
PUT
Take-Two Interactive
TTWO
$45B
| $20K | ﹤0.01% |
324
+166
| +105% | +$14.9K |
|
3173
CALL
Under Armour Class C
UA
$2.96B
| $20K | ﹤0.01% |
1,405
-1,374
| -49% | -$23.1K |
|
3174
PUT
United States Oil Fund
USO
$2.08B
| $20K | ﹤0.01% |
64
-129
| -67% | -$10.2K |
|
3175
Valvoline
VVV
$5.03B
| $20K | ﹤0.01% |
874
-2,246
| -72% | -$50.4K |
|
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.