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 | |
|---|---|---|---|---|---|---|
701
PUT
Verisk Analytics
VRSK
$25.3B
| $3.84M | 0.01% |
352
+323
| +1,114% | +$37.8K |
|
|
HES
702
PUT
DELISTED
Hess
HES
| $3.83M | 0.01% |
947
-939
| -50% | -$53.5K |
|
703
CALL
ING
ING
$92.7B
| $3.83M | 0.01% |
3,598
+2,657
| +282% | +$31.9K |
|
704
PUT
Dollar General
DG
$25.4B
| $3.83M | 0.01% |
354
-483
| -58% | -$52.3K |
|
705
PUT
State Street SPDR Portfolio Europe ETF
SPEU
$707M
| $3.83M | 0.01% |
1,150
+105
| +10% | +$3.29K |
|
706
CALL
AngloGold Ashanti
AU
$39.7B
| $3.82M | 0.01% |
3,043
+3,008
| +8,594% | +$30.9K |
|
|
JNPR
707
CALL
DELISTED
Juniper Networks
JNPR
| $3.81M | 0.01% |
1,418
-293
| -17% | -$8.29K |
|
708
CALL
International Flavors & Fragrances
IFF
$18.8B
| $3.81M | 0.01% |
284
-99
| -26% | -$13.7K |
|
709
PUT
Albemarle
ALB
$13.8B
| $3.81M | 0.01% |
494
-243
| -33% | -$22.9K |
|
710
CALL
Trip.com Group
TCOM
$27.1B
| $3.78M | 0.01% |
1,396
+330
| +31% | +$10.1K |
|
|
KSU
711
PUT
DELISTED
Kansas City Southern
KSU
| $3.77M | 0.01% |
395
+68
| +21% | +$6.9K |
|
|
BLUE
712
PUT
DELISTED
bluebird bio
BLUE
| $3.76M | 0.01% |
29
+17
| +142% | +$26.1K |
|
713
PUT
iShares Convertible Bond ETF
ICVT
$7.37B
| $3.73M | 0.01% |
1,241
+1,111
| +855% | +$61.7K |
|
714
PUT
Emerson Electric
EMR
$81.2B
| $3.72M | 0.01% |
623
+554
| +803% | +$37.4K |
|
715
PUT
Freeport-McMoran
FCX
$91.3B
| $3.72M | 0.01% |
3,608
-1,668
| -32% | -$19.5K |
|
716
PUT
Edwards Lifesciences
EW
$48.3B
| $3.71M | 0.01% |
726
-1,704
| -70% | -$86.2K |
|
717
JD.com
JD
$40.6B
| $3.71M | 0.01% |
177,053
-277,567
| -61% | -$6.21M |
|
718
CALL
Tractor Supply
TSCO
$15.9B
| $3.7M | 0.01% |
2,220
+50
| +2% | +$897 |
|
719
CALL
McCormick & Company Non-Voting
MKC
$13.5B
| $3.66M | 0.01% |
526
+390
| +287% | +$28K |
|
720
PUT
Hershey
HSY
$34.9B
| $3.65M | 0.01% |
341
+13
| +4% | +$1.38K |
|
721
CALL
L3Harris
LHX
$55.8B
| $3.65M | 0.01% |
271
+193
| +247% | +$29.2K |
|
|
K
722
PUT
DELISTED
Kellanova
K
| $3.65M | 0.01% |
682
+359
| +111% | +$21.7K |
|
723
CALL
Trade Desk
TTD
$7.89B
| $3.64M | 0.01% |
3,140
-6,490
| -67% | -$81.2K |
|
724
CALL
Corning
GLW
$134B
| $3.64M | 0.01% |
1,205
+269
| +29% | +$8.58K |
|
725
CALL
Bank of Montreal
BMO
$124B
| $3.64M | 0.01% |
557
+479
| +614% | +$35.5K |
|
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.