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 | |
|---|---|---|---|---|---|---|
176
TAL Education Group
TAL
$5.72B
| $2.23M | 0.1% |
75,211
+52,532
| +232% | +$1.6M |
|
177
PVH
PVH
$3.56B
| $2.2M | 0.09% |
16,046
+3,471
| +28% | +$453K |
|
178
Tyson Foods
TSN
$20.4B
| $2.18M | 0.09% |
26,850
+10,240
| +62% | +$784K |
|
179
iShares Russell 2000 Value ETF
IWN
$14.5B
| $2.17M | 0.09% |
17,268
-6,425
| -27% | -$803K |
|
|
CZR
180
DELISTED
Caesars Entertainment Corporation
CZR
| $2.17M | 0.09% |
+171,300
| New | +$2.17M |
|
181
Deutsche Bank
DB
$67.7B
| $2.16M | 0.09% |
113,404
-33,155
| -23% | -$598K |
|
182
Abbott
ABT
$174B
| $2.15M | 0.09% |
+37,678
| New | +$2.09M |
|
183
CALL
Nike
NKE
$63.7B
| $2.14M | 0.09% |
4,593
+1,193
| +35% | +$68.6K |
|
184
CALL
AutoZone
AZO
$49.2B
| $2.11M | 0.09% |
1,173
+120
| +11% | +$76.7K |
|
185
Simon Property Group
SPG
$74B
| $2.11M | 0.09% |
+12,268
| New | +$1.99M |
|
186
CALL
Bausch Health
BHC
$1.69B
| $2.1M | 0.09% |
6,809
+4,291
| +170% | +$68K |
|
|
LNW
187
DELISTED
Light & Wonder
LNW
| $2.09M | 0.09% |
40,773
-31,160
| -43% | -$1.52M |
|
188
PUT
Intuitive Surgical
ISRG
$124B
| $2.04M | 0.09% |
8,286
+2,229
| +37% | +$279K |
|
189
CALL
Bath & Body Works
BBWI
$4.09B
| $2.04M | 0.09% |
1,779
+416
| +31% | +$16.8K |
|
|
BLUE
190
CALL
DELISTED
bluebird bio
BLUE
| $2.02M | 0.09% |
37
-11
| -23% | -$22.3K |
|
191
CALL
Visa
V
$677B
| $2.01M | 0.09% |
3,606
-294
| -8% | -$32.5K |
|
192
PUT
CVS Health
CVS
$141B
| $1.96M | 0.08% |
2,979
+753
| +34% | +$54.7K |
|
193
eBay
EBAY
$50.2B
| $1.95M | 0.08% |
+51,654
| New | +$1.92M |
|
194
iShares 7-10 Year Treasury Bond ETF
IEF
$47.3B
| $1.93M | 0.08% |
18,328
+1,649
| +10% | +$175K |
|
195
CALL
NetEase
NTES
$82.9B
| $1.93M | 0.08% |
5,970
+2,795
| +88% | +$175K |
|
196
Aflac
AFL
$62.9B
| $1.92M | 0.08% |
43,684
-1,582
| -3% | -$67.5K |
|
197
NRG Energy
NRG
$27.8B
| $1.92M | 0.08% |
67,326
-19,741
| -23% | -$537K |
|
|
MNDT
198
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.91M | 0.08% |
134,537
+103,026
| +327% | +$1.57M |
|
199
Ulta Beauty
ULTA
$21B
| $1.9M | 0.08% |
8,514
-29,680
| -78% | -$6.28M |
|
200
ProShares Ultra Dow30
DDM
$537M
| $1.89M | 0.08% |
+85,884
| New | +$1.73M |
|
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.