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 | |
|---|---|---|---|---|---|---|
|
BZUN
2551
CALL
Baozun
BZUN
$144M
| $45K | ﹤0.01% |
136
-307
| -69% | -$9.91K |
|
2552
CALL
Canadian Solar
CSIQ
$906M
| $45K | ﹤0.01% |
1,262
+996
| +374% | +$17.1K |
|
2553
HealthEquity
HQY
$7.91B
| $45K | ﹤0.01% |
979
-239
| -20% | -$11.8K |
|
2554
Kinross Gold
KGC
$28.5B
| $45K | ﹤0.01% |
10,424
+4,504
| +76% | +$18.8K |
|
2555
CALL
Pediatrix Medical
MD
$2.16B
| $45K | ﹤0.01% |
+38
| New | +$1.79K |
|
2556
CALL
NGL Energy Partners
NGL
$1.94B
| $45K | ﹤0.01% |
350
+132
| +61% | +$1.63K |
|
2557
PUT
Prospect Capital
PSEC
$1.06B
| $45K | ﹤0.01% |
492
+130
| +36% | +$848 |
|
2558
CALL
Transocean
RIG
$5.92B
| $45K | ﹤0.01% |
749
-354
| -32% | -$3.67K |
|
2559
CALL
Travel + Leisure Co
TNL
$4.54B
| $45K | ﹤0.01% |
295
+16
| +6% | +$793 |
|
2560
Vanguard Mid-Cap Growth ETF
VOT
$19B
| $45K | ﹤0.01% |
+360
| New | +$45.2K |
|
|
COUP
2561
DELISTED
Coupa Software Incorporated
COUP
| $45K | ﹤0.01% |
1,468
-6,978
| -83% | -$237K |
|
|
KL
2562
CALL
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $45K | ﹤0.01% |
+475
| New | +$6.54K |
|
|
TIVO
2563
PUT
DELISTED
Tivo Inc
TIVO
| $45K | ﹤0.01% |
+190
| New | +$3.29K |
|
|
AFSI
2564
PUT
DELISTED
AmTrust Financial Services, Inc.
AFSI
| $45K | ﹤0.01% |
247
+38
| +18% | +$431 |
|
|
PERY
2565
CALL
DELISTED
Perry Ellis International Inc
PERY
| $45K | ﹤0.01% |
262
+98
| +60% | +$2.34K |
|
2566
Ameren
AEE
$31.5B
| $44K | ﹤0.01% |
754
-554
| -42% | -$34K |
|
2567
First Majestic Silver
AG
$8.05B
| $44K | ﹤0.01% |
6,547
-39,987
| -86% | -$276K |
|
2568
Bloomin' Brands
BLMN
$680M
| $44K | ﹤0.01% |
2,095
+1,147
| +121% | +$22K |
|
2569
Ericsson
ERIC
$30.7B
| $44K | ﹤0.01% |
6,619
-7,597
| -53% | -$47.4K |
|
2570
PUT
Franklin Covey
FC
$233M
| $44K | ﹤0.01% |
333
-308
| -48% | -$6.04K |
|
2571
PUT
The Greenbrier Companies
GBX
$1.61B
| $44K | ﹤0.01% |
178
-46
| -21% | -$2.31K |
|
2572
CALL
HDFC Bank
HDB
$119B
| $44K | ﹤0.01% |
672
+196
| +41% | +$4.69K |
|
2573
Icahn Enterprises
IEP
$5.17B
| $44K | ﹤0.01% |
766
-1,386
| -64% | -$75.3K |
|
2574
Malibu Boats
MBUU
$544M
| $44K | ﹤0.01% |
+1,500
| New | +$45.7K |
|
2575
CALL
Nabors Industries
NBR
$1.23B
| $44K | ﹤0.01% |
12
+5
| +71% | +$1.59K |
|
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.