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 | |
|---|---|---|---|---|---|---|
3451
Arcturus Therapeutics
ARCT
$164M
| $13K | ﹤0.01% |
897
+117
| +15% | +$1.75K |
|
3452
PUT
Buckle
BKE
$2.25B
| $13K | ﹤0.01% |
69
+58
| +527% | +$1.33K |
|
3453
PUT
Cardinal Health
CAH
$53.7B
| $13K | ﹤0.01% |
139
-33
| -19% | -$2.39K |
|
3454
PUT
Cheesecake Factory
CAKE
$4.32B
| $13K | ﹤0.01% |
169
+125
| +284% | +$7.06K |
|
3455
CALL
Clean Energy Fuels
CLNE
$432M
| $13K | ﹤0.01% |
278
-57
| -17% | -$215 |
|
3456
PUT
Clearway Energy Class C
CWEN
$5B
| $13K | ﹤0.01% |
160
-42
| -21% | -$657 |
|
3457
PUT
DexCom
DXCM
$28.3B
| $13K | ﹤0.01% |
80
-108
| -57% | -$1.91K |
|
3458
PUT
Evercore
EVR
$13.2B
| $13K | ﹤0.01% |
+29
| New | +$1.78K |
|
3459
iShares MSCI Singapore ETF
EWS
$1.03B
| $13K | ﹤0.01% |
+697
| New | +$14.6K |
|
3460
CALL
Extra Space Storage
EXR
$31.3B
| $13K | ﹤0.01% |
78
+51
| +189% | +$3.75K |
|
3461
EyePoint Inc
EYPT
$1.04B
| $13K | ﹤0.01% |
810
+524
| +183% | +$10.6K |
|
3462
CALL
First Horizon
FHN
$12.1B
| $13K | ﹤0.01% |
112
-201
| -64% | -$3.54K |
|
3463
PUT
Invesco CurrencyShares Canadian Dollar Trust
FXC
$72.6M
| $13K | ﹤0.01% |
7
-175
| -96% | -$13K |
|
|
HDSN
3464
CALL
Hudson Technologies
HDSN
$263M
| $13K | ﹤0.01% |
+141
| New | +$995 |
|
3465
PUT
Hormel Foods
HRL
$14.3B
| $13K | ﹤0.01% |
81
-47
| -37% | -$1.7K |
|
3466
CALL
Invesco
IVZ
$13.3B
| $13K | ﹤0.01% |
427
-153
| -26% | -$4.71K |
|
3467
CALL
Kinross Gold
KGC
$28.6B
| $13K | ﹤0.01% |
294
-216
| -42% | -$758 |
|
3468
CALL
Grand Canyon Education
LOPE
$3.84B
| $13K | ﹤0.01% |
+28
| New | +$1.43K |
|
3469
Dorian LPG
LPG
$1.88B
| $13K | ﹤0.01% |
1,686
-17,295
| -91% | -$124K |
|
3470
PUT
MBIA
MBI
$282M
| $13K | ﹤0.01% |
831
-103
| -11% | -$951 |
|
3471
PUT
Magna International
MGA
$18.3B
| $13K | ﹤0.01% |
34
+16
| +89% | +$672 |
|
3472
CALL
Nordic American Tanker
NAT
$1.37B
| $13K | ﹤0.01% |
609
+143
| +31% | +$1.27K |
|
3473
CALL
Navigator Holdings
NVGS
$1.34B
| $13K | ﹤0.01% |
+251
| New | +$2.07K |
|
3474
CALL
Enviri
NVRI
$620M
| $13K | ﹤0.01% |
100
-102
| -50% | -$1.22K |
|
3475
PUT
Newell Brands
NWL
$2.2B
| $13K | ﹤0.01% |
97
-62
| -39% | -$3K |
|
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.