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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3651
CALL
Inogen
INGN
$174M
| $11K | ﹤0.01% |
+18
| New | +$1.11K |
|
3652
CALL
Iovance Biotherapeutics
IOVA
$2.12B
| $11K | ﹤0.01% |
189
+56
| +42% | +$385 |
|
3653
CALL
Jazz Pharmaceuticals
JAZZ
$16.3B
| $11K | ﹤0.01% |
96
-7
| -7% | -$780 |
|
|
KNDI
3654
CALL
Kandi Technologies Group
KNDI
$65M
| $11K | ﹤0.01% |
343
+128
| +60% | +$635 |
|
|
HAPN
3655
CALL
Happen Inc
HAPN
$2.21B
| $11K | ﹤0.01% |
141
-99
| -41% | -$2.72K |
|
3656
PUT
Lexicon Pharmaceuticals
LXRX
$999M
| $11K | ﹤0.01% |
284
+198
| +230% | +$3.18K |
|
3657
CALL
LSB Industries
LXU
$829M
| $11K | ﹤0.01% |
634
+504
| +388% | +$2.92K |
|
3658
PUT
La-Z-Boy
LZB
$1.65B
| $11K | ﹤0.01% |
153
+127
| +488% | +$3.44K |
|
3659
CALL
Macerich
MAC
$7.53B
| $11K | ﹤0.01% |
+57
| New | +$4.07K |
|
3660
CALL
Masco
MAS
$16.6B
| $11K | ﹤0.01% |
346
-172
| -33% | -$5.52K |
|
3661
PUT
Motorola Solutions
MSI
$73.1B
| $11K | ﹤0.01% |
306
+161
| +111% | +$12.6K |
|
3662
PUT
NovaGold Resources
NG
$2.57B
| $11K | ﹤0.01% |
68
+31
| +84% | +$140 |
|
3663
PUT
Packaging Corp of America
PKG
$22.7B
| $11K | ﹤0.01% |
33
-41
| -55% | -$3.44K |
|
3664
CALL
PPG Industries
PPG
$27.2B
| $11K | ﹤0.01% |
35
+4
| +13% | +$382 |
|
3665
CALL
Ferrari
RACE
$68.4B
| $11K | ﹤0.01% |
55
-251
| -82% | -$13.7K |
|
3666
CALL
Ralph Lauren
RL
$22.8B
| $11K | ﹤0.01% |
110
+5
| +5% | +$508 |
|
3667
PUT
Roper Technologies
ROP
$38.8B
| $11K | ﹤0.01% |
+39
| New | +$6.99K |
|
3668
VanEck Retail ETF
RTH
$253M
| $11K | ﹤0.01% |
151
-3,089
| -95% | -$239K |
|
3669
ProShares Short Russell2000
RWM
$131M
| $11K | ﹤0.01% |
242
-2,143
| -90% | -$112K |
|
3670
CALL
Snap-on
SNA
$21.6B
| $11K | ﹤0.01% |
21
-45
| -68% | -$7.32K |
|
3671
PUT
Truist Financial
TFC
$64.5B
| $11K | ﹤0.01% |
1,885
+1,491
| +378% | +$63.4K |
|
3672
PUT
ReposiTrak
TRAK
$160M
| $11K | ﹤0.01% |
117
+68
| +139% | +$923 |
|
3673
PUT
Trex
TREX
$4.61B
| $11K | ﹤0.01% |
+136
| New | +$2.12K |
|
3674
Sixth Street Specialty
TSLX
$1.68B
| $11K | ﹤0.01% |
+602
| New | +$11K |
|
3675
CALL
Viavi Solutions
VIAV
$8.64B
| $11K | ﹤0.01% |
94
-107
| -53% | -$831 |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.