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 | |
|---|---|---|---|---|---|---|
1501
PUT
Energy Transfer Partners
ET
$70.1B
| $1.95M | ﹤0.01% |
1,520
+790
| +108% | +$9.73K |
|
1502
CALL
NRG Energy
NRG
$29.8B
| $1.94M | ﹤0.01% |
489
+41
| +9% | +$1.62K |
|
|
NVTA
1503
PUT
DELISTED
Invitae Corporation
NVTA
| $1.94M | ﹤0.01% |
1,205
+608
| +102% | +$10.8K |
|
1504
Ferrari
RACE
$63.3B
| $1.94M | ﹤0.01% |
11,737
+437
| +4% | +$70.7K |
|
1505
CALL
Cognex
CGNX
$10.3B
| $1.94M | ﹤0.01% |
346
+100
| +41% | +$5.17K |
|
|
CEO
1506
PUT
DELISTED
CNOOC Limited
CEO
| $1.93M | ﹤0.01% |
116
-2
| -2% | -$306 |
|
|
MRTX
1507
CALL
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.93M | ﹤0.01% |
150
-49
| -25% | -$4.73K |
|
1508
CALL
Brighthouse Financial
BHF
$3.63B
| $1.93M | ﹤0.01% |
492
+432
| +720% | +$17K |
|
1509
CALL
IPG Photonics
IPGP
$3.89B
| $1.93M | ﹤0.01% |
133
-104
| -44% | -$14.5K |
|
|
UNIT
1510
CALL
Uniti Group
UNIT
$2.63B
| $1.92M | ﹤0.01% |
2,344
+910
| +63% | +$6.58K |
|
1511
PUT
Casey's General Stores
CASY
$31.9B
| $1.92M | ﹤0.01% |
121
+66
| +120% | +$10.9K |
|
1512
PUT
Nu Skin
NUS
$247M
| $1.92M | ﹤0.01% |
469
+411
| +709% | +$16.8K |
|
|
EB
1513
DELISTED
Eventbrite
EB
| $1.92M | ﹤0.01% |
+95,117
| New | +$1.82M |
|
1514
CALL
Trane Technologies
TT
$106B
| $1.91M | ﹤0.01% |
144
-115
| -44% | -$14.6K |
|
1515
PUT
Lithia Motors
LAD
$7.78B
| $1.91M | ﹤0.01% |
130
+59
| +83% | +$8.87K |
|
1516
PUT
Deutsche Bank
DB
$66.3B
| $1.91M | ﹤0.01% |
2,449
-605
| -20% | -$4.54K |
|
1517
CALL
Bilibili
BILI
$7.18B
| $1.9M | ﹤0.01% |
1,023
+668
| +188% | +$10.8K |
|
1518
GE Aerospace
GE
$367B
| $1.9M | ﹤0.01% |
34,244
-47,316
| -58% | -$2.44M |
|
1519
CALL
Elastic
ESTC
$6.1B
| $1.9M | ﹤0.01% |
296
-126
| -30% | -$9.24K |
|
1520
CALL
Packaging Corp of America
PKG
$22.7B
| $1.9M | ﹤0.01% |
170
+130
| +325% | +$14.3K |
|
|
BNY
1521
CALL
Bank of New York Mellon
BNY
$108B
| $1.9M | ﹤0.01% |
377
-392
| -51% | -$18.7K |
|
|
AVLR
1522
PUT
DELISTED
Avalara, Inc.
AVLR
| $1.9M | ﹤0.01% |
259
-134
| -34% | -$9.73K |
|
|
EPAY
1523
DELISTED
Bottomline Technologies Inc
EPAY
| $1.9M | ﹤0.01% |
35,392
+18,806
| +113% | +$855K |
|
|
BBBY
1524
CALL
DELISTED
Bed Bath & Beyond Inc
BBBY
| $1.89M | ﹤0.01% |
1,093
-1,102
| -50% | -$15.4K |
|
1525
CALL
Canadian Imperial Bank of Commerce
CM
$107B
| $1.89M | ﹤0.01% |
454
-268
| -37% | -$11.3K |
|
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.