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 | |
|---|---|---|---|---|---|---|
3626
CALL
Baytex Energy
BTE
$2.86B
| $11K | ﹤0.01% |
+556
| New | +$2.41K |
|
3627
PUT
Caleres
CAL
$447M
| $11K | ﹤0.01% |
+216
| New | +$6.33K |
|
3628
CALL
Chemed
CHE
$6.87B
| $11K | ﹤0.01% |
+20
| New | +$2.94K |
|
|
3629
PUT
Chemed
CHE
$6.87B
| $11K | ﹤0.01% |
46
+37
| +411% | +$5.43K |
|
|
CIM
3630
CALL
Chimera Investment
CIM
$1.06B
| $11K | ﹤0.01% |
85
+26
| +44% | +$1.27K |
|
3631
CALL
Clearfield
CLFD
$425M
| $11K | ﹤0.01% |
90
-29
| -24% | -$551 |
|
3632
CALL
Curtiss-Wright
CW
$26.9B
| $11K | ﹤0.01% |
+56
| New | +$5.32K |
|
3633
CALL
Editas Medicine
EDIT
$402M
| $11K | ﹤0.01% |
89
+64
| +256% | +$971 |
|
3634
PUT
Energy Focus
EFOI
$17.6M
| $11K | ﹤0.01% |
4
+1
| +33% | +$158 |
|
3635
CALL
Everest Group
EG
$15.8B
| $11K | ﹤0.01% |
6
-6
| -50% | -$1.24K |
|
|
ESPR
3636
CALL
DELISTED
Esperion Therapeutics
ESPR
| $11K | ﹤0.01% |
56
-5
| -8% | -$60 |
|
3637
PUT
Etsy
ETSY
$8.21B
| $11K | ﹤0.01% |
42
+36
| +600% | +$466 |
|
|
EXK
3638
Endeavour Silver
EXK
$2.29B
| $11K | ﹤0.01% |
3,163
-5
| -0.2% | -$20 |
|
3639
CALL
Future Fuel
FF
$202M
| $11K | ﹤0.01% |
+69
| New | +$892 |
|
3640
PUT
Five Below
FIVE
$11.5B
| $11K | ﹤0.01% |
87
+30
| +53% | +$1.18K |
|
3641
PUT
Fluor
FLR
$6.89B
| $11K | ﹤0.01% |
188
-10
| -5% | -$519 |
|
3642
PUT
Fomento Económico Mexicano
FMX
$43.5B
| $11K | ﹤0.01% |
9
-134
| -94% | -$11.5K |
|
|
TDAY
3643
CALL
USA Today Co
TDAY
$1.27B
| $11K | ﹤0.01% |
+103
| New | +$1.59K |
|
3644
Guidewire Software
GWRE
$13.3B
| $11K | ﹤0.01% |
225
-269
| -54% | -$15.1K |
|
|
HIMX
3645
CALL
Himax Technologies
HIMX
$2.09B
| $11K | ﹤0.01% |
2,611
+1,009
| +63% | +$7.63K |
|
3646
CALL
Hormel Foods
HRL
$14.1B
| $11K | ﹤0.01% |
144
-130
| -47% | -$4.69K |
|
3647
PUT
Heron Therapeutics
HRTX
$92M
| $11K | ﹤0.01% |
44
-341
| -89% | -$5.35K |
|
3648
PUT
Icon
ICLR
$13.9B
| $11K | ﹤0.01% |
52
-30
| -37% | -$2.33K |
|
3649
PUT
Idacorp
IDA
$8.24B
| $11K | ﹤0.01% |
+100
| New | +$7.71K |
|
|
BRSL
3650
PUT
Brightstar Lottery PLC
BRSL
$1.92B
| $11K | ﹤0.01% |
+79
| New | +$2.12K |
|
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.