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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
751
CALL
Cboe Global Markets
CBOE
$29.8B
| $5.45M | 0.01% |
454
+195
| +75% | +$22.9K |
|
752
PUT
Labcorp
LH
$23.9B
| $5.43M | 0.01% |
374
+365
| +4,056% | +$52.7K |
|
753
CALL
Ford
F
$56.4B
| $5.43M | 0.01% |
5,837
+3,419
| +141% | +$30.7K |
|
754
PUT
Clorox
CLX
$11.3B
| $5.4M | 0.01% |
352
+186
| +112% | +$27.8K |
|
755
CALL
TJX Companies
TJX
$170B
| $5.4M | 0.01% |
884
-224
| -20% | -$13.2K |
|
756
CALL
XPO
XPO
$25.1B
| $5.39M | 0.01% |
1,957
-220
| -10% | -$6.04K |
|
|
LHCG
757
PUT
DELISTED
LHC Group LLC
LHCG
| $5.39M | 0.01% |
391
-245
| -39% | -$30.5K |
|
758
CALL
Alexandria Real Estate Equities
ARE
$8.73B
| $5.38M | 0.01% |
+333
| New | +$52.5K |
|
759
PUT
Canadian Pacific Kansas City
CP
$82B
| $5.38M | 0.01% |
1,055
+930
| +744% | +$43.6K |
|
|
BLUE
760
CALL
DELISTED
bluebird bio
BLUE
| $5.37M | 0.01% |
47
-9
| -16% | -$9.78K |
|
761
CALL
LyondellBasell Industries
LYB
$19.9B
| $5.36M | 0.01% |
567
+60
| +12% | +$5.5K |
|
762
Vanguard S&P 500 ETF
VOO
$967B
| $5.35M | 0.01% |
18,099
+9,140
| +102% | +$2.59M |
|
763
CALL
DexCom
DXCM
$27.2B
| $5.34M | 0.01% |
976
+624
| +177% | +$29.6K |
|
|
764
PUT
Ford
F
$56.4B
| $5.33M | 0.01% |
5,730
+2,849
| +99% | +$25.6K |
|
765
CALL
National Healthcare
NHC
$3.46B
| $5.32M | 0.01% |
616
+277
| +82% | +$23.1K |
|
766
CALL
Eversource Energy
ES
$28.1B
| $5.32M | 0.01% |
625
+537
| +610% | +$44.7K |
|
|
GBT
767
CALL
DELISTED
Global Blood Therapeutics, Inc.
GBT
| $5.31M | 0.01% |
668
+128
| +24% | +$7.58K |
|
|
JWN
768
CALL
DELISTED
Nordstrom
JWN
| $5.3M | 0.01% |
1,295
+333
| +35% | +$12.3K |
|
769
PUT
Cummins
CMI
$91.8B
| $5.3M | 0.01% |
296
-34
| -10% | -$5.98K |
|
770
PUT
Cardinal Health
CAH
$52.9B
| $5.29M | 0.01% |
1,047
+117
| +13% | +$6.04K |
|
771
Applied Materials
AMAT
$447B
| $5.28M | 0.01% |
+86,510
| New | +$4.86M |
|
772
PUT
Dow Inc
DOW
$22.3B
| $5.27M | 0.01% |
963
+557
| +137% | +$28.8K |
|
|
AL
773
PUT
DELISTED
Air Lease Corp
AL
| $5.26M | 0.01% |
1,108
+874
| +374% | +$39.2K |
|
774
PUT
MetLife
MET
$59.5B
| $5.25M | 0.01% |
1,031
-361
| -26% | -$17.4K |
|
775
CALL
Hexcel
HXL
$8.29B
| $5.24M | 0.01% |
715
+88
| +14% | +$6.76K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.