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 | |
|---|---|---|---|---|---|---|
101
CALL
Intuitive Surgical
ISRG
$124B
| $4.23M | 0.18% |
3,474
+747
| +27% | +$93.5K |
|
102
AbbVie
ABBV
$448B
| $4.05M | 0.17% |
41,900
+19,104
| +84% | +$1.8M |
|
103
CALL
Bank of America
BAC
$430B
| $4.03M | 0.17% |
10,547
+6,095
| +137% | +$168K |
|
104
iShares US Home Construction ETF
ITB
$2.36B
| $3.98M | 0.17% |
91,030
+90,755
| +33,002% | +$3.68M |
|
105
Morgan Stanley
MS
$332B
| $3.97M | 0.17% |
75,702
+74,493
| +6,162% | +$3.77M |
|
106
Comcast
CMCSA
$84.9B
| $3.96M | 0.17% |
98,897
-11,985
| -11% | -$451K |
|
107
Charter Communications
CHTR
$15.9B
| $3.83M | 0.16% |
11,398
+3,966
| +53% | +$1.35M |
|
108
Amgen
AMGN
$198B
| $3.79M | 0.16% |
+21,787
| New | +$3.86M |
|
109
Mondelez International
MDLZ
$76.8B
| $3.74M | 0.16% |
87,325
-83,473
| -49% | -$3.5M |
|
110
PUT
Micron Technology
MU
$1.1T
| $3.71M | 0.16% |
15,020
+2,682
| +22% | +$116K |
|
111
CALL
Mastercard
MA
$484B
| $3.65M | 0.16% |
1,633
-572
| -26% | -$85.1K |
|
|
RDS.A
112
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $3.65M | 0.16% |
54,721
+43,427
| +385% | +$2.74M |
|
113
Blackrock
BLK
$163B
| $3.6M | 0.15% |
+7,007
| New | +$3.41M |
|
|
CELG
114
PUT
DELISTED
Celgene Corp
CELG
| $3.51M | 0.15% |
4,682
+2,326
| +99% | +$262K |
|
115
CALL
Qualcomm
QCOM
$183B
| $3.49M | 0.15% |
9,560
+7,564
| +379% | +$459K |
|
116
Kimberly-Clark
KMB
$36B
| $3.49M | 0.15% |
28,911
+16,506
| +133% | +$1.93M |
|
117
CALL
Goldman Sachs
GS
$311B
| $3.48M | 0.15% |
3,225
+281
| +10% | +$68.9K |
|
|
BWLD
118
DELISTED
Buffalo Wild Wings, Inc.
BWLD
| $3.45M | 0.15% |
22,066
+15,259
| +224% | +$2.01M |
|
|
119
PUT
Baidu
BIDU
$36.8B
| $3.43M | 0.15% |
4,112
+1,023
| +33% | +$250K |
|
|
X
120
DELISTED
US Steel
X
| $3.43M | 0.15% |
97,360
+18,267
| +23% | +$531K |
|
121
Caterpillar
CAT
$410B
| $3.42M | 0.15% |
21,716
-18,134
| -46% | -$2.52M |
|
122
CALL
Salesforce
CRM
$139B
| $3.34M | 0.14% |
3,880
-99
| -2% | -$10.1K |
|
123
Freeport-McMoran
FCX
$89.9B
| $3.27M | 0.14% |
+172,750
| New | +$2.61M |
|
124
CALL
JPMorgan Chase
JPM
$901B
| $3.24M | 0.14% |
5,046
+340
| +7% | +$34.4K |
|
125
Advanced Micro Devices
AMD
$888B
| $3.24M | 0.14% |
315,409
+66,189
| +27% | +$773K |
|
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.