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 | |
|---|---|---|---|---|---|---|
1476
Ventas
VTR
$48.4B
| $155K | 0.01% |
2,598
-1,421
| -35% | -$89.8K |
|
1477
W&T Offshore
WTI
$546M
| $155K | 0.01% |
+46,898
| New | +$146K |
|
|
COR
1478
DELISTED
Coresite Realty Corporation
COR
| $155K | 0.01% |
1,369
+1,037
| +312% | +$118K |
|
|
CXRX
1479
PUT
DELISTED
Concordia International Corp. Common Stock
CXRX
| $155K | 0.01% |
486
+185
| +61% | +$127 |
|
1480
PUT
Opko Health
OPK
$914M
| $154K | 0.01% |
525
+377
| +255% | +$2.19K |
|
1481
PUT
Rio Tinto
RIO
$149B
| $154K | 0.01% |
1,161
-482
| -29% | -$23.5K |
|
1482
CALL
Dentsply Sirona
XRAY
$2.61B
| $154K | 0.01% |
404
-222
| -35% | -$14.1K |
|
|
JOYY
1483
PUT
JOYY Inc
JOYY
$3.72B
| $154K | 0.01% |
412
+134
| +48% | +$13.4K |
|
|
TVRD
1484
Tvardi Therapeutics
TVRD
$23.5M
| $154K | 0.01% |
352
+341
| +3,100% | +$155K |
|
|
ARRY
1485
CALL
DELISTED
Array Biopharma Inc
ARRY
| $154K | 0.01% |
771
+60
| +8% | +$682 |
|
|
MON
1486
PUT
DELISTED
Monsanto Co
MON
| $154K | 0.01% |
1,893
+529
| +39% | +$62.9K |
|
1487
PUT
Assured Guaranty
AGO
$3.78B
| $153K | 0.01% |
967
+126
| +15% | +$4.57K |
|
|
FENG
1488
Phoenix New Media
FENG
$16.8M
| $153K | 0.01% |
3,936
+873
| +29% | +$32.5K |
|
1489
Inogen
INGN
$168M
| $153K | 0.01% |
+1,292
| New | +$142K |
|
|
JKS
1490
JinkoSolar
JKS
$787M
| $153K | 0.01% |
6,379
+5,786
| +976% | +$146K |
|
|
SF
1491
CALL
Stifel
SF
$12.2B
| $153K | 0.01% |
697
-248
| -26% | -$6.07K |
|
|
SAFM
1492
DELISTED
Sanderson Farms Inc
SAFM
| $153K | 0.01% |
+1,105
| New | +$171K |
|
|
NVO
1493
Novo Nordisk
NVO
$216B
| $152K | 0.01% |
+5,674
| New | +$144K |
|
|
KOL
1494
DELISTED
VanEck Vectors Coal ETF
KOL
| $152K | 0.01% |
948
+741
| +358% | +$112K |
|
1495
Allegion
ALLE
$13.1B
| $151K | 0.01% |
+1,905
| New | +$160K |
|
1496
CALL
Franklin Covey
FC
$235M
| $151K | 0.01% |
393
+309
| +368% | +$6.06K |
|
1497
PUT
Lumen
LUMN
$6.68B
| $151K | 0.01% |
899
-363
| -29% | -$6.16K |
|
|
WLH
1498
DELISTED
WILLIAM LYON HOMES
WLH
| $150K | 0.01% |
+5,167
| New | +$140K |
|
|
ANSS
1499
DELISTED
Ansys
ANSS
| $149K | 0.01% |
+1,010
| New | +$143K |
|
1500
Clean Energy Fuels
CLNE
$454M
| $149K | 0.01% |
73,545
+69,329
| +1,644% | +$153K |
|
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.