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 |
iShares Russell 2000 ETF
IWM
|
+$58.5M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$56.5M |
| 3 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$44.1M |
| 4 |
Apple
AAPL
|
+$20.3M |
| 5 |
State Street SPDR S&P Oil & Gas Exploration & Production ETF
XOP
|
+$12.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$109M |
| 2 |
Meta Platforms (Facebook)
META
|
+$62.3M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$36.2M |
| 4 |
Goldman Sachs
GS
|
+$27.1M |
| 5 |
Boeing
BA
|
+$24.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.49% |
| 2 | Consumer Discretionary | 0.48% |
| 3 | Technology | 0.4% |
| 4 | Financials | 0.25% |
| 5 | Industrials | 0.22% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
901
Travelers Companies
TRV
$78.5B
| $2.69M | 0.01% |
+22,430
| New | +$2.81M |
|
902
CALL
Linde
LIN
$234B
| $2.68M | 0.01% |
+172
| New | +$27.2K |
|
903
CALL
Hasbro
HAS
$12.4B
| $2.68M | 0.01% |
330
+9
| +3% | +$837 |
|
|
BLUE
904
CALL
DELISTED
bluebird bio
BLUE
| $2.68M | 0.01% |
21
+4
| +24% | +$6.14K |
|
|
GRMN
905
CALL
Garmin
GRMN
$46.3B
| $2.68M | 0.01% |
423
-33
| -7% | -$2.14K |
|
906
CALL
Mohawk Industries
MHK
$6.71B
| $2.68M | 0.01% |
229
-18
| -7% | -$2.4K |
|
|
SIVB
907
CALL
DELISTED
SVB Financial Group
SIVB
| $2.68M | 0.01% |
141
-46
| -25% | -$11.2K |
|
908
CALL
Zillow
Z
$6.77B
| $2.67M | 0.01% |
847
+418
| +97% | +$14.8K |
|
909
CALL
Keysight
KEYS
$55.6B
| $2.67M | 0.01% |
430
+93
| +28% | +$5.6K |
|
910
PUT
Campbell Soup
CPB
$6.38B
| $2.65M | 0.01% |
805
-969
| -55% | -$36.7K |
|
911
CALL
NIO
NIO
$11.6B
| $2.64M | 0.01% |
4,148
+3,427
| +475% | +$23.8K |
|
912
CALL
C.H. Robinson
CHRW
$24.2B
| $2.63M | 0.01% |
313
+45
| +17% | +$4.03K |
|
913
PUT
Columbia Sportswear
COLM
$3.16B
| $2.63M | 0.01% |
313
-12
| -4% | -$1.06K |
|
914
CALL
National Health Investors
NHI
$3.88B
| $2.63M | 0.01% |
348
+211
| +154% | +$15.9K |
|
915
PUT
iQIYI
IQ
$1.17B
| $2.63M | 0.01% |
1,766
-3,149
| -64% | -$65.7K |
|
916
PUT
Prudential Financial
PRU
$40.9B
| $2.63M | 0.01% |
322
+9
| +3% | +$829 |
|
917
CALL
ArcelorMittal
MT
$49.9B
| $2.62M | 0.01% |
1,269
+817
| +181% | +$20.2K |
|
918
PUT
PTC
PTC
$13.1B
| $2.62M | 0.01% |
316
+87
| +38% | +$7.64K |
|
|
VIAB
919
CALL
DELISTED
Viacom Inc. Class B
VIAB
| $2.61M | 0.01% |
1,016
-776
| -43% | -$23.9K |
|
|
IMMU
920
CALL
DELISTED
Immunomedics Inc
IMMU
| $2.6M | 0.01% |
1,825
+1,077
| +144% | +$21.4K |
|
921
PUT
IPG Photonics
IPGP
$4.09B
| $2.59M | 0.01% |
229
+132
| +136% | +$17.5K |
|
922
PUT
Harley-Davidson
HOG
$2.79B
| $2.59M | 0.01% |
759
+86
| +13% | +$3.37K |
|
923
PUT
Eastman Chemical
EMN
$7.77B
| $2.59M | 0.01% |
354
+287
| +428% | +$22.9K |
|
924
CALL
Acuity Brands
AYI
$9.79B
| $2.59M | 0.01% |
225
+136
| +153% | +$16.8K |
|
|
JOYY
925
PUT
JOYY Inc
JOYY
$3.66B
| $2.58M | 0.01% |
431
-399
| -48% | -$26K |
|
Similar funds
Simplex Trading's Q4 2018 Portfolio in Review
As of Q4 2018, Simplex Trading held 8,576 positions worth $34.1B, up 9.5% from $31.1B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q4 2018 filing shows 1,199 new, 2,701 increased, 2,877 reduced and 1,573 closed positions. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M. The largest sale was Amazon, an estimated $109M.
By sector, the portfolio is most concentrated in Communication Services at 0.49% of assets, down from 0.89% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q4 2018 buy was State Street SPDR S&P 500 ETF Trust: 163,699 shares worth $40.9M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q4 2018, an estimated $58.5M increase.
- Simplex Trading's biggest Q4 2018 reduction was Amazon, cutting an estimated $109M.
- Simplex Trading fully exited Meta Platforms (Facebook) in Q4 2018, selling an estimated $62.3M.
- Simplex Trading's ten largest holdings make up 43% of its $34.1B portfolio in Q4 2018.
- Simplex Trading opened 1,199 new positions and closed 1,573 in Q4 2018.
- Simplex Trading's portfolio value rose 9.5% quarter-over-quarter to $34.1B.
Based on Simplex Trading's 13F filing for Q4 2018, filed 16 Jan 2019.