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 | |
|---|---|---|---|---|---|---|
1051
iShares US Home Construction ETF
ITB
$2.4B
| $2.12M | 0.01% |
70,611
+64,600
| +1,075% | +$2.03M |
|
1052
PUT
Exelixis
EXEL
$13.9B
| $2.11M | 0.01% |
1,073
+703
| +190% | +$12.5K |
|
1053
Bank OZK
OZK
$5.5B
| $2.11M | 0.01% |
92,351
+85,538
| +1,256% | +$2.37M |
|
1054
CALL
TSMC
TSM
$2.1T
| $2.11M | 0.01% |
571
-706
| -55% | -$26.9K |
|
|
DOCU
1055
CALL
DocuSign
DOCU
$9.55B
| $2.1M | 0.01% |
525
-493
| -48% | -$20.7K |
|
1056
PUT
Knight Transportation
KNX
$11.9B
| $2.1M | 0.01% |
839
+749
| +832% | +$23.2K |
|
1057
CALL
Unum
UNM
$13.8B
| $2.1M | 0.01% |
714
+451
| +171% | +$15.8K |
|
1058
MetLife
MET
$60.2B
| $2.09M | 0.01% |
+50,894
| New | +$2.18M |
|
|
PARA
1059
CALL
DELISTED
Paramount Global Class B
PARA
| $2.09M | 0.01% |
478
-1,112
| -70% | -$59.1K |
|
|
SPLK
1060
DELISTED
Splunk Inc
SPLK
| $2.09M | 0.01% |
19,925
-30,637
| -61% | -$3.1M |
|
1061
Yelp
YELP
$1.4B
| $2.09M | 0.01% |
59,653
+11,033
| +23% | +$422K |
|
1062
PUT
Aflac
AFL
$63.7B
| $2.09M | 0.01% |
458
+367
| +403% | +$16.3K |
|
|
PPLI
1063
CALL
People Inc
PPLI
$3.12B
| $2.09M | 0.01% |
638
-632
| -50% | -$21.2K |
|
|
LHCG
1064
PUT
DELISTED
LHC Group LLC
LHCG
| $2.08M | 0.01% |
222
+108
| +95% | +$10.3K |
|
1065
PUT
Textron
TXT
$16.6B
| $2.08M | 0.01% |
453
+38
| +9% | +$2.14K |
|
1066
PUT
Amphenol
APH
$188B
| $2.08M | 0.01% |
1,028
+960
| +1,412% | +$20.6K |
|
|
APC
1067
PUT
DELISTED
Anadarko Petroleum
APC
| $2.08M | 0.01% |
475
-682
| -59% | -$38.5K |
|
1068
PUT
Deutsche Bank
DB
$66.4B
| $2.08M | 0.01% |
2,553
+880
| +53% | +$8.59K |
|
1069
PUT
Ciena
CIEN
$55B
| $2.08M | 0.01% |
613
-123
| -17% | -$3.9K |
|
1070
CALL
LiveRamp
RAMP
$2.29B
| $2.08M | 0.01% |
538
-255
| -32% | -$11.5K |
|
1071
CALL
Ecolab
ECL
$75.4B
| $2.08M | 0.01% |
141
+75
| +114% | +$11.5K |
|
1072
CALL
PACCAR
PCAR
$70B
| $2.07M | 0.01% |
545
+263
| +93% | +$10.5K |
|
1073
Capri Holdings
CPRI
$1.79B
| $2.07M | 0.01% |
+54,675
| New | +$2.75M |
|
|
CMA
1074
DELISTED
Comerica
CMA
| $2.07M | 0.01% |
30,154
+29,048
| +2,626% | +$2.31M |
|
1075
CALL
Illinois Tool Works
ITW
$81B
| $2.06M | 0.01% |
163
+27
| +20% | +$3.56K |
|
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.