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 | |
|---|---|---|---|---|---|---|
1101
CALL
EOG Resources
EOG
$77.5B
| $256K | 0.01% |
846
-652
| -44% | -$65.7K |
|
1102
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$744M
| $256K | 0.01% |
3,347
-720
| -18% | -$16.5K |
|
1103
DHT Holdings
DHT
$2.96B
| $255K | 0.01% |
71,233
+32,201
| +82% | +$125K |
|
1104
PUT
Procter & Gamble
PG
$342B
| $255K | 0.01% |
5,473
-1,083
| -17% | -$97.4K |
|
1105
Madison Square Garden
MSGS
$9.49B
| $253K | 0.01% |
1,684
+1,104
| +190% | +$170K |
|
1106
Ooma
OOMA
$532M
| $253K | 0.01% |
21,199
+10,984
| +108% | +$117K |
|
|
SEM
1107
DELISTED
Select Medical
SEM
| $253K | 0.01% |
26,700
+14,135
| +112% | +$135K |
|
1108
CALL
Shopify
SHOP
$145B
| $253K | 0.01% |
7,910
+3,030
| +62% | +$31K |
|
1109
AGCO
AGCO
$8.49B
| $252K | 0.01% |
3,536
+2,659
| +303% | +$190K |
|
1110
Brunswick
BC
$5.17B
| $252K | 0.01% |
4,578
-1,746
| -28% | -$95K |
|
1111
PUT
Macy's
M
$6.14B
| $252K | 0.01% |
2,650
-1,065
| -29% | -$23.4K |
|
1112
MACOM Technology Solutions
MTSI
$21.6B
| $252K | 0.01% |
7,774
-31,194
| -80% | -$1.13M |
|
1113
CALL
Analog Devices
ADI
$185B
| $251K | 0.01% |
819
-244
| -23% | -$21.6K |
|
1114
CALL
Cigna
CI
$75.7B
| $251K | 0.01% |
101
-174
| -63% | -$34.6K |
|
|
APC
1115
CALL
DELISTED
Anadarko Petroleum
APC
| $251K | 0.01% |
815
+242
| +42% | +$11.9K |
|
|
CAVM
1116
CALL
DELISTED
Cavium, Inc.
CAVM
| $251K | 0.01% |
145
+51
| +54% | +$3.95K |
|
1117
ABM Industries
ABM
$2.77B
| $250K | 0.01% |
6,651
+6,634
| +39,024% | +$274K |
|
1118
PUT
Cardinal Health
CAH
$52.9B
| $250K | 0.01% |
709
+357
| +101% | +$22.1K |
|
1119
Federal Realty Investment Trust
FRT
$10.8B
| $250K | 0.01% |
1,888
+1,384
| +275% | +$179K |
|
1120
Hilton Worldwide
HLT
$72.9B
| $250K | 0.01% |
3,140
-2,448
| -44% | -$182K |
|
1121
Insperity
NSP
$1.83B
| $250K | 0.01% |
4,376
+3,954
| +937% | +$209K |
|
|
AVX
1122
DELISTED
AVX Corporation
AVX
| $250K | 0.01% |
+14,497
| New | +$265K |
|
1123
AES
AES
$10.6B
| $249K | 0.01% |
+23,073
| New | +$250K |
|
1124
CALL
Humana
HUM
$47.4B
| $249K | 0.01% |
250
-140
| -36% | -$34.6K |
|
1125
Supernus Pharmaceuticals
SUPN
$2.74B
| $249K | 0.01% |
6,251
-1,889
| -23% | -$74.6K |
|
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.