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 | |
|---|---|---|---|---|---|---|
|
AMTD
1176
CALL
DELISTED
TD Ameritrade Holding Corp
AMTD
| $231K | 0.01% |
305
-21
| -6% | -$1.05K |
|
1177
CALL
New Oriental
EDU
$7.85B
| $230K | 0.01% |
281
+140
| +99% | +$12.4K |
|
1178
PUT
Take-Two Interactive
TTWO
$42.7B
| $228K | 0.01% |
841
+517
| +160% | +$56.5K |
|
1179
PUT
Honeywell
HON
$78B
| $227K | 0.01% |
3,578
-437
| -11% | -$58.6K |
|
1180
Nabors Industries
NBR
$1.25B
| $227K | 0.01% |
666
-1,838
| -73% | -$585K |
|
|
BWLD
1181
CALL
DELISTED
Buffalo Wild Wings, Inc.
BWLD
| $227K | 0.01% |
372
+219
| +143% | +$28.8K |
|
1182
PUT
UnitedHealth
UNH
$385B
| $226K | 0.01% |
2,254
+52
| +2% | +$11K |
|
|
VER
1183
DELISTED
VEREIT, Inc.
VER
| $226K | 0.01% |
5,819
+1,589
| +38% | +$63.7K |
|
1184
PUT
Herbalife
HLF
$1.22B
| $225K | 0.01% |
4,442
+1,062
| +31% | +$37.2K |
|
1185
CALL
Philip Morris
PM
$298B
| $225K | 0.01% |
1,674
+760
| +83% | +$81K |
|
1186
CALL
Vipshop
VIPS
$6.92B
| $225K | 0.01% |
1,298
+1,016
| +360% | +$8.99K |
|
1187
CALL
VeriSign
VRSN
$23.8B
| $225K | 0.01% |
254
-169
| -40% | -$18.9K |
|
|
ICPT
1188
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $225K | 0.01% |
+3,856
| New | +$243K |
|
|
GCAP
1189
PUT
DELISTED
Gain Capital Holdings, Inc.
GCAP
| $225K | 0.01% |
+2,198
| New | +$15.8K |
|
|
AVP
1190
PUT
DELISTED
Avon Products, Inc.
AVP
| $225K | 0.01% |
2,104
+630
| +43% | +$1.35K |
|
|
IDTI
1191
DELISTED
Integrated Device Technology I
IDTI
| $225K | 0.01% |
+7,583
| New | +$228K |
|
|
CHL
1192
DELISTED
China Mobile Limited
CHL
| $225K | 0.01% |
4,458
+2,826
| +173% | +$142K |
|
1193
Element Solutions
ESI
$9.33B
| $224K | 0.01% |
+22,660
| New | +$235K |
|
1194
Halozyme
HALO
$9.59B
| $224K | 0.01% |
11,077
+6,673
| +152% | +$123K |
|
1195
iShares Russell 2000 Growth ETF
IWO
$14.6B
| $224K | 0.01% |
+1,204
| New | +$220K |
|
1196
Synaptics
SYNA
$4.59B
| $224K | 0.01% |
+5,614
| New | +$215K |
|
1197
CALL
Albemarle
ALB
$13.8B
| $223K | 0.01% |
328
+115
| +54% | +$15.6K |
|
1198
Itaú Unibanco
ITUB
$92B
| $223K | 0.01% |
+35,416
| New | +$226K |
|
1199
PUT
McDonald's
MCD
$187B
| $223K | 0.01% |
2,798
+272
| +11% | +$45.7K |
|
|
NXTM
1200
PUT
DELISTED
NxStage Medical Inc.
NXTM
| $223K | 0.01% |
475
+136
| +40% | +$3.58K |
|
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.