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 | |
|---|---|---|---|---|---|---|
3376
PUT
Actinium Pharmaceuticals
ATNM
$26.7M
| $18K | ﹤0.01% |
+3
| New | +$60 |
|
3377
B2Gold
BTG
$5.14B
| $18K | ﹤0.01% |
6,058
+4,605
| +317% | +$12.4K |
|
3378
CALL
Cogent Communications
CCOI
$642M
| $18K | ﹤0.01% |
60
-116
| -66% | -$5.53K |
|
3379
CALL
Campbell Soup
CPB
$6.91B
| $18K | ﹤0.01% |
371
-237
| -39% | -$11.3K |
|
|
DOG
3380
ProShares Short Dow30
DOG
$109M
| $18K | ﹤0.01% |
+313
| New | +$19.6K |
|
3381
PUT
Eastman Chemical
EMN
$7.87B
| $18K | ﹤0.01% |
96
-184
| -66% | -$16.7K |
|
3382
PUT
Edwards Lifesciences
EW
$48.2B
| $18K | ﹤0.01% |
378
-231
| -38% | -$8.48K |
|
|
EXK
3383
Endeavour Silver
EXK
$2.29B
| $18K | ﹤0.01% |
7,903
-7,351
| -48% | -$16.6K |
|
3384
CALL
Genworth Financial
GNW
$3.81B
| $18K | ﹤0.01% |
1,605
-5
| -0.3% | -$17 |
|
3385
PUT
US Global Investors
GROW
$37M
| $18K | ﹤0.01% |
+159
| New | +$539 |
|
3386
PUT
HDFC Bank
HDB
$123B
| $18K | ﹤0.01% |
176
+76
| +76% | +$1.82K |
|
3387
PUT
Intuit
INTU
$87B
| $18K | ﹤0.01% |
91
+58
| +176% | +$8.84K |
|
3388
Amplify Mobile Payments ETF
IPAY
$172M
| $18K | ﹤0.01% |
+526
| New | +$17.9K |
|
3389
CALL
ITT
ITT
$17.7B
| $18K | ﹤0.01% |
27
-37
| -58% | -$1.86K |
|
3390
CALL
MiMedx Group
MDXG
$652M
| $18K | ﹤0.01% |
97
-244
| -72% | -$2.98K |
|
3391
MacroGenics
MGNX
$240M
| $18K | ﹤0.01% |
+972
| New | +$18.1K |
|
|
OBE
3392
Obsidian Energy
OBE
$637M
| $18K | ﹤0.01% |
2,115
-357
| -14% | -$2.89K |
|
3393
CALL
Paycom
PAYC
$7.61B
| $18K | ﹤0.01% |
72
-56
| -44% | -$4.48K |
|
3394
PUT
Papa John's
PZZA
$1.03B
| $18K | ﹤0.01% |
52
-75
| -59% | -$4.67K |
|
3395
PUT
Qualys
QLYS
$4.87B
| $18K | ﹤0.01% |
+113
| New | +$6.35K |
|
3396
CALL
Regenxbio
RGNX
$608M
| $18K | ﹤0.01% |
29
-31
| -52% | -$934 |
|
3397
CALL
RCI Hospitality Holdings
RICK
$205M
| $18K | ﹤0.01% |
152
+47
| +45% | +$1.35K |
|
3398
CALL
SiriusXM
SIRI
$10.7B
| $18K | ﹤0.01% |
48
-98
| -67% | -$5.41K |
|
3399
PUT
Teucrium Soybean Fund
SOYB
$62.2M
| $18K | ﹤0.01% |
190
-7
| -4% | -$129 |
|
3400
CALL
Toyota
TM
$221B
| $18K | ﹤0.01% |
45
+7
| +18% | +$873 |
|
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.