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 | |
|---|---|---|---|---|---|---|
1076
Viper Energy
VNOM
$8.81B
| $269K | 0.01% |
+11,532
| New | +$234K |
|
1077
CALL
Conagra Brands
CAG
$6.88B
| $268K | 0.01% |
1,244
+524
| +73% | +$18.6K |
|
1078
United Rentals
URI
$71.4B
| $268K | 0.01% |
+1,560
| New | +$237K |
|
1079
WEC Energy
WEC
$37.4B
| $268K | 0.01% |
4,035
-344
| -8% | -$23.1K |
|
|
ACIA
1080
PUT
DELISTED
Acacia Communications Inc
ACIA
| $268K | 0.01% |
175
+16
| +10% | +$653 |
|
|
PAY
1081
DELISTED
Verifone Systems Inc
PAY
| $268K | 0.01% |
15,177
+9,131
| +151% | +$170K |
|
1082
CALL
Cummins
CMI
$91.8B
| $266K | 0.01% |
209
-161
| -44% | -$27.5K |
|
|
BPFH
1083
DELISTED
Boston Private Financial Holdings, Inc.
BPFH
| $266K | 0.01% |
17,264
+16,248
| +1,599% | +$259K |
|
|
EMBJ
1084
Embraer S.A. ADS
EMBJ
$11.7B
| $265K | 0.01% |
+11,089
| New | +$227K |
|
|
NUVA
1085
DELISTED
NuVasive, Inc.
NUVA
| $264K | 0.01% |
4,521
-2,117
| -32% | -$120K |
|
1086
PUT
Altria Group
MO
$120B
| $262K | 0.01% |
4,033
+1,015
| +34% | +$68K |
|
1087
American Electric Power
AEP
$73.4B
| $261K | 0.01% |
3,561
-12,969
| -78% | -$969K |
|
1088
PUT
MBIA
MBI
$293M
| $261K | 0.01% |
1,172
+1,073
| +1,084% | +$8.34K |
|
1089
Teekay
TK
$973M
| $261K | 0.01% |
28,075
+16,689
| +147% | +$144K |
|
1090
Pan American Silver
PAAS
$18.6B
| $260K | 0.01% |
16,747
-4,231
| -20% | -$67K |
|
1091
CALL
ProShares UltraShort Health Care
RXD
$3.3M
| $260K | 0.01% |
1,215
-5
| -0.4% | -$618 |
|
1092
WEX
WEX
$5.94B
| $260K | 0.01% |
+1,844
| New | +$231K |
|
1093
CALL
BHP
BHP
$212B
| $259K | 0.01% |
518
+331
| +177% | +$12.5K |
|
1094
CALL
Wolfspeed
WOLF
$1.35B
| $259K | 0.01% |
548
+241
| +79% | +$8.31K |
|
1095
PUT
Comcast
CMCSA
$78.3B
| $258K | 0.01% |
5,444
+2,685
| +97% | +$101K |
|
1096
CALL
CF Industries
CF
$19.5B
| $257K | 0.01% |
778
-69
| -8% | -$2.6K |
|
|
ESPR
1097
CALL
DELISTED
Esperion Therapeutics
ESPR
| $257K | 0.01% |
252
+223
| +769% | +$12K |
|
1098
CALL
Williams Companies
WMB
$92B
| $257K | 0.01% |
2,216
-69
| -3% | -$2.01K |
|
|
CLVS
1099
CALL
DELISTED
Clovis Oncology, Inc.
CLVS
| $257K | 0.01% |
556
+310
| +126% | +$21.7K |
|
1100
Alamos Gold
AGI
$12.3B
| $256K | 0.01% |
39,389
+37,510
| +1,996% | +$245K |
|
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.