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 |
CELG
Celgene Corp
CELG
|
+$31.6M |
| 2 |
Citigroup
C
|
+$19.5M |
| 3 |
AGN
Allergan plc
AGN
|
+$18.4M |
| 4 |
Baidu
BIDU
|
+$18M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$14.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$81.3M |
| 2 |
NVIDIA
NVDA
|
+$60.2M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$48.2M |
| 4 |
Apple
AAPL
|
+$48.2M |
| 5 |
Meta Platforms (Facebook)
META
|
+$31.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 11.27% |
| 2 | Technology | 10.64% |
| 3 | Healthcare | 7.06% |
| 4 | Communication Services | 6.92% |
| 5 | Industrials | 5.66% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SHLD
2176
CALL
DELISTED
Sears Holding Corporation
SHLD
| $66K | ﹤0.01% |
3,298
+1,125
| +52% | +$5.56K |
|
2177
CALL
BJ's Restaurants
BJRI
$1.41B
| $65K | ﹤0.01% |
210
-191
| -48% | -$6.37K |
|
2178
PUT
Cameco
CCJ
$38.3B
| $65K | ﹤0.01% |
307
+164
| +115% | +$1.54K |
|
2179
Ceragon Networks
CRNT
$194M
| $65K | ﹤0.01% |
33,278
+8,076
| +32% | +$15.9K |
|
|
GRMN
2180
CALL
Garmin
GRMN
$46.9B
| $65K | ﹤0.01% |
171
-79
| -32% | -$4.63K |
|
2181
CALL
Leidos
LDOS
$14.1B
| $65K | ﹤0.01% |
225
+212
| +1,631% | +$13.3K |
|
2182
PUT
Cheniere Energy
LNG
$56.5B
| $65K | ﹤0.01% |
771
+180
| +30% | +$8.68K |
|
2183
CALL
Manhattan Associates
MANH
$8.97B
| $65K | ﹤0.01% |
+138
| New | +$6.19K |
|
2184
CALL
Marathon Digital Holdings
MARA
$4.62B
| $65K | ﹤0.01% |
+100
| New | +$1.18K |
|
2185
PUT
MGM Resorts International
MGM
$11.7B
| $65K | ﹤0.01% |
1,374
-754
| -35% | -$24.3K |
|
2186
PUT
ServiceNow
NOW
$102B
| $65K | ﹤0.01% |
1,520
-1,185
| -44% | -$29.5K |
|
2187
PUT
NXP Semiconductors
NXPI
$68B
| $65K | ﹤0.01% |
2,063
-423
| -17% | -$48.9K |
|
2188
PUT
PNC Financial Services
PNC
$100B
| $65K | ﹤0.01% |
1,580
+175
| +12% | +$24.2K |
|
2189
Pinnacle West Capital
PNW
$12.9B
| $65K | ﹤0.01% |
+766
| New | +$67.6K |
|
|
GAP
2190
PUT
The Gap Inc
GAP
$6.84B
| $65K | ﹤0.01% |
909
-174
| -16% | -$5.19K |
|
|
DATA
2191
PUT
DELISTED
Tableau Software, Inc.
DATA
| $65K | ﹤0.01% |
538
+234
| +77% | +$17.2K |
|
|
BRS
2192
DELISTED
Bristow Group, Inc.
BRS
| $65K | ﹤0.01% |
+4,870
| New | +$57.7K |
|
|
SODA
2193
PUT
DELISTED
SodaStream International Ltd
SODA
| $65K | ﹤0.01% |
517
+164
| +46% | +$10.9K |
|
2194
CALL
American Tower
AMT
$77.7B
| $64K | ﹤0.01% |
172
-219
| -56% | -$31.3K |
|
2195
CACI
CACI
$10.8B
| $64K | ﹤0.01% |
487
+122
| +33% | +$16.5K |
|
2196
CRISPR Therapeutics
CRSP
$4.58B
| $64K | ﹤0.01% |
2,768
-555
| -17% | -$10.5K |
|
2197
ImmunityBio
IBRX
$7.44B
| $64K | ﹤0.01% |
14,349
+3,959
| +38% | +$18.7K |
|
2198
PUT
Kinder Morgan
KMI
$73.1B
| $64K | ﹤0.01% |
425
+20
| +5% | +$359 |
|
2199
MakeMyTrip
MMYT
$4.67B
| $64K | ﹤0.01% |
2,147
-3,096
| -59% | -$85.6K |
|
|
NGD
2200
DELISTED
New Gold Inc
NGD
| $64K | ﹤0.01% |
+19,560
| New | +$65.7K |
|
Similar funds
Simplex Trading's Q4 2017 Portfolio in Review
As of Q4 2017, Simplex Trading held 7,407 positions worth $2.32B, down 5.1% from $2.45B the previous quarter. Its ten largest holdings account for 17% of the portfolio.
Simplex Trading withdrew a net $315M in Q4 2017, closing 1,460 positions and reducing 2,239 holdings. Its most notable exit was iShares 20+ Year Treasury Bond ETF, an estimated $21.1M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 11% of assets, down from 14% a quarter earlier, followed by Technology and Healthcare.
Against the trend, Simplex Trading opened a new position in Celgene Corp worth $29.2M.
- Simplex Trading's largest Q4 2017 buy was Celgene Corp: 280,194 shares worth $29.2M.
- Simplex Trading added most to Baidu in Q4 2017, an estimated $18M increase.
- Simplex Trading's biggest Q4 2017 reduction was Amazon, cutting an estimated $81.3M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q4 2017, selling an estimated $21.1M.
- Simplex Trading's ten largest holdings make up 17% of its $2.32B portfolio in Q4 2017.
- Simplex Trading opened 1,548 new positions and closed 1,460 in Q4 2017.
- Simplex Trading's portfolio value fell 5.1% quarter-over-quarter to $2.32B.
Based on Simplex Trading's 13F filing for Q4 2017, filed 10 Jan 2018.