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 | |
|---|---|---|---|---|---|---|
|
POT
201
DELISTED
Potash Corp Of Saskatchewan
POT
| $1.86M | 0.08% |
90,105
+74,982
| +496% | +$1.45M |
|
|
XYZ
202
PUT
Block Inc
XYZ
$46.3B
| $1.86M | 0.08% |
6,312
+1,565
| +33% | +$57.3K |
|
203
Constellation Brands
STZ
$22.4B
| $1.85M | 0.08% |
8,106
-53,680
| -87% | -$11.6M |
|
204
CALL
American International
AIG
$41.6B
| $1.84M | 0.08% |
3,130
+462
| +17% | +$28.4K |
|
205
Mercado Libre
MELI
$91.6B
| $1.83M | 0.08% |
+5,823
| New | +$1.58M |
|
206
United Therapeutics
UTHR
$26.3B
| $1.83M | 0.08% |
12,372
+5,405
| +78% | +$687K |
|
207
CALL
Norfolk Southern
NSC
$74.6B
| $1.83M | 0.08% |
1,014
-148
| -13% | -$19.9K |
|
208
CALL
lululemon athletica
LULU
$12.9B
| $1.82M | 0.08% |
1,797
-210
| -10% | -$14K |
|
209
CALL
XPO
XPO
$25.2B
| $1.8M | 0.08% |
2,119
-1,232
| -37% | -$31.5K |
|
210
Blackstone
BX
$150B
| $1.77M | 0.08% |
55,326
+21,206
| +62% | +$690K |
|
|
ETP
211
DELISTED
Energy Transfer Partners, L.P.
ETP
| $1.76M | 0.08% |
98,421
+31,244
| +47% | +$539K |
|
|
DATA
212
DELISTED
Tableau Software, Inc.
DATA
| $1.76M | 0.08% |
25,464
+19,866
| +355% | +$1.46M |
|
|
MON
213
DELISTED
Monsanto Co
MON
| $1.76M | 0.08% |
+15,096
| New | +$1.8M |
|
214
PUT
State Street Materials Select Sector SPDR ETF
XLB
$8.43B
| $1.74M | 0.08% |
63,834
+8,924
| +16% | +$263K |
|
|
TWX
215
CALL
DELISTED
Time Warner Inc
TWX
| $1.74M | 0.07% |
7,765
+6,429
| +481% | +$607K |
|
216
KraneShares CSI China Internet ETF
KWEB
$5.25B
| $1.73M | 0.07% |
29,526
+11,422
| +63% | +$663K |
|
217
PUT
Gilead Sciences
GILD
$163B
| $1.73M | 0.07% |
5,376
+89
| +2% | +$6.76K |
|
|
VMW
218
DELISTED
VMware, Inc
VMW
| $1.71M | 0.07% |
+13,683
| New | +$1.64M |
|
219
ConocoPhillips
COP
$145B
| $1.71M | 0.07% |
31,225
-89,944
| -74% | -$4.63M |
|
220
PUT
Deutsche Bank
DB
$68.3B
| $1.7M | 0.07% |
1,925
-453
| -19% | -$8.17K |
|
221
Unilever
UL
$133B
| $1.7M | 0.07% |
27,348
+26,561
| +3,375% | +$1.68M |
|
222
WisdomTree India Earnings Fund ETF
EPI
$2.03B
| $1.7M | 0.07% |
60,925
+30,326
| +99% | +$809K |
|
223
iShares Silver Trust
SLV
$29B
| $1.69M | 0.07% |
+105,631
| New | +$1.67M |
|
224
PUT
Walt Disney
DIS
$168B
| $1.69M | 0.07% |
7,961
-683
| -8% | -$70.4K |
|
225
CALL
Costco
COST
$409B
| $1.68M | 0.07% |
2,489
-291
| -10% | -$50.2K |
|
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.