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 | |
|---|---|---|---|---|---|---|
1001
ZTO Express
ZTO
$18.3B
| $217K | 0.01% |
+18,049
| New | +$260K |
|
|
AIMC
1002
DELISTED
Altra Industrial Motion Corp
AIMC
| $217K | 0.01% |
5,904
+4,330
| +275% | +$144K |
|
|
ACAS
1003
CALL
DELISTED
American Capital Ltd
ACAS
| $216K | 0.01% |
1,228
+348
| +40% | +$5.99K |
|
1004
CALL
Axos Financial
AX
$5.42B
| $215K | 0.01% |
642
+378
| +143% | +$9K |
|
1005
CALL
Flowers Foods
FLO
$1.64B
| $215K | 0.01% |
327
+301
| +1,158% | +$4.95K |
|
|
SIOX
1006
DELISTED
Sio Gene Therapies Inc. Common Stock
SIOX
| $215K | 0.01% |
+2,169
| New | +$228K |
|
|
AMTD
1007
DELISTED
TD Ameritrade Holding Corp
AMTD
| $215K | 0.01% |
+4,940
| New | +$192K |
|
1008
Jones Lang LaSalle
JLL
$14.8B
| $214K | 0.01% |
2,125
+1,040
| +96% | +$105K |
|
|
GAP
1009
PUT
The Gap Inc
GAP
$6.8B
| $214K | 0.01% |
1,263
-541
| -30% | -$13.9K |
|
|
CLR
1010
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $214K | 0.01% |
+4,161
| New | +$215K |
|
|
CVSA
1011
Covista Inc
CVSA
$3.92B
| $213K | 0.01% |
+6,840
| New | +$185K |
|
1012
CALL
Dell
DELL
$284B
| $213K | 0.01% |
2,031
-1,297
| -39% | -$18.6K |
|
1013
Pultegroup
PHM
$23.7B
| $213K | 0.01% |
+11,615
| New | +$221K |
|
1014
CALL
RTX Corp
RTX
$282B
| $213K | 0.01% |
1,878
-158
| -8% | -$10.5K |
|
|
FMSA
1015
CALL
DELISTED
Fairmount Santrol Holdings Inc.
FMSA
| $213K | 0.01% |
1,165
+1,067
| +1,089% | +$9.87K |
|
|
STI
1016
CALL
DELISTED
SunTrust Banks, Inc.
STI
| $212K | 0.01% |
399
+65
| +19% | +$3.25K |
|
1017
AutoNation
AN
$6.86B
| $211K | 0.01% |
+4,355
| New | +$202K |
|
|
BRFS
1018
DELISTED
BRF SA
BRFS
| $211K | 0.01% |
14,356
+13,239
| +1,185% | +$209K |
|
1019
PUT
NOV
NOV
$7.22B
| $211K | 0.01% |
1,065
+155
| +17% | +$5.65K |
|
1020
CALL
ProShares UltraShort Industrials
SIJ
$5.78M
| $211K | 0.01% |
149
-10
| -6% | -$4.5K |
|
1021
PUT
Edwards Lifesciences
EW
$48.3B
| $210K | 0.01% |
615
+237
| +63% | +$7.68K |
|
|
FL
1022
CALL
DELISTED
Foot Locker
FL
| $210K | 0.01% |
635
+328
| +107% | +$23.3K |
|
1023
PUT
Lockheed Martin
LMT
$131B
| $210K | 0.01% |
640
-1,533
| -71% | -$383K |
|
1024
Sensata Technologies
ST
$6.63B
| $210K | 0.01% |
+5,416
| New | +$206K |
|
|
HTZ
1025
DELISTED
Hertz Global Holdings, Inc.
HTZ
| $210K | 0.01% |
11,218
+1,178
| +12% | +$29.5K |
|
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.