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 | |
|---|---|---|---|---|---|---|
|
LVNTA
3051
PUT
DELISTED
Liberty Interactive Corporation Series A Liberty Ventures
LVNTA
| $27K | ﹤0.01% |
221
+212
| +2,356% | +$12.1K |
|
|
GGP
3052
PUT
DELISTED
GGP Inc.
GGP
| $27K | ﹤0.01% |
1,845
+936
| +103% | +$20.8K |
|
|
IO
3053
DELISTED
ION Geophysical Corporation
IO
| $27K | ﹤0.01% |
+1,411
| New | +$17.7K |
|
|
VIA
3054
DELISTED
Viacom Inc. Class A
VIA
| $27K | ﹤0.01% |
795
| – | – |
|
3055
PUT
Assembly Biosciences
ASMB
$511M
| $26K | ﹤0.01% |
24
-19
| -44% | -$8.6K |
|
3056
Alibaba
BABA
$275B
| $26K | ﹤0.01% |
153
-90,227
| -100% | -$16.2M |
|
3057
Cogent Communications
CCOI
$608M
| $26K | ﹤0.01% |
+575
| New | +$27.4K |
|
3058
CVB Financial
CVBF
$4.02B
| $26K | ﹤0.01% |
+1,114
| New | +$26.5K |
|
3059
CALL
Cemex
CX
$17.6B
| $26K | ﹤0.01% |
1,478
-355
| -19% | -$2.81K |
|
|
DMC
3060
Del Monte Corp
DMC
$1.37B
| $26K | ﹤0.01% |
553
-282
| -34% | -$13.3K |
|
3061
PUT
GATX Corp
GATX
$6.54B
| $26K | ﹤0.01% |
213
+194
| +1,021% | +$11.8K |
|
3062
PUT
Galicia Financial Group
GGAL
$8.06B
| $26K | ﹤0.01% |
336
+159
| +90% | +$9.12K |
|
3063
CALL
Harley-Davidson
HOG
$2.66B
| $26K | ﹤0.01% |
142
-286
| -67% | -$13.9K |
|
3064
CALL
MarineMax
HZO
$801M
| $26K | ﹤0.01% |
100
+92
| +1,150% | +$1.77K |
|
3065
PUT
International Paper
IP
$22.5B
| $26K | ﹤0.01% |
459
-6
| -1% | -$322 |
|
3066
CALL
IQVIA
IQV
$35.2B
| $26K | ﹤0.01% |
155
+32
| +26% | +$3.26K |
|
3067
CALL
JetBlue
JBLU
$2.04B
| $26K | ﹤0.01% |
116
-56
| -33% | -$1.14K |
|
3068
PUT
Nordson
NDSN
$16.5B
| $26K | ﹤0.01% |
71
+55
| +344% | +$7.07K |
|
3069
PUT
Realty Income
O
$61.6B
| $26K | ﹤0.01% |
276
+68
| +33% | +$3.69K |
|
3070
PUT
PTC Therapeutics
PTCT
$6.35B
| $26K | ﹤0.01% |
194
-1,263
| -87% | -$21.4K |
|
3071
CALL
SEI Investments
SEIC
$12B
| $26K | ﹤0.01% |
+33
| New | +$2.21K |
|
3072
CALL
The Bancorp
TBBK
$2.82B
| $26K | ﹤0.01% |
147
+47
| +47% | +$431 |
|
|
UNIT
3073
PUT
Uniti Group
UNIT
$2.61B
| $26K | ﹤0.01% |
281
-99
| -26% | -$1.63K |
|
3074
CALL
Verisk Analytics
VRSK
$27.2B
| $26K | ﹤0.01% |
66
+1
| +2% | +$91 |
|
|
WPRT
3075
CALL
Westport Fuel Systems
WPRT
$34.2M
| $26K | ﹤0.01% |
17
+13
| +325% | +$423 |
|
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.