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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
VAR
1651
CALL
DELISTED
Varian Medical Systems, Inc.
VAR
| $1.29M | ﹤0.01% |
126
+123
| +4,100% | +$16.2K |
|
1652
CALL
Amphenol
APH
$188B
| $1.29M | ﹤0.01% |
708
+624
| +743% | +$14.9K |
|
|
MIME
1653
CALL
DELISTED
Mimecast Limited
MIME
| $1.29M | ﹤0.01% |
365
+220
| +152% | +$9.51K |
|
1654
Virtu Financial
VIRT
$5.2B
| $1.29M | ﹤0.01% |
+61,842
| New | +$1.14M |
|
1655
CALL
Post Holdings
POST
$4.12B
| $1.29M | ﹤0.01% |
237
+35
| +17% | +$2.27K |
|
1656
CALL
Stride
LRN
$3.69B
| $1.28M | ﹤0.01% |
680
+646
| +1,900% | +$11.9K |
|
1657
CALL
SAP
SAP
$187B
| $1.28M | ﹤0.01% |
116
-248
| -68% | -$31.3K |
|
1658
Trip.com Group
TCOM
$27.5B
| $1.28M | ﹤0.01% |
+54,627
| New | +$1.7M |
|
|
DAY
1659
CALL
DELISTED
Dayforce
DAY
| $1.28M | ﹤0.01% |
256
+64
| +33% | +$4.24K |
|
|
IMMU
1660
CALL
DELISTED
Immunomedics Inc
IMMU
| $1.28M | ﹤0.01% |
950
-2,114
| -69% | -$35.6K |
|
1661
Datadog
DDOG
$87.9B
| $1.28M | ﹤0.01% |
+35,566
| New | +$1.47M |
|
1662
Textron
TXT
$16.6B
| $1.28M | ﹤0.01% |
47,931
+24,934
| +108% | +$1.01M |
|
|
CTRA
1663
DELISTED
Coterra Energy
CTRA
| $1.28M | ﹤0.01% |
74,290
+31,108
| +72% | +$492K |
|
1664
CALL
Scotiabank
BNS
$106B
| $1.27M | ﹤0.01% |
314
-16
| -5% | -$809 |
|
|
CBPO
1665
CALL
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $1.27M | ﹤0.01% |
118
-16
| -12% | -$1.84K |
|
|
OPTU
1666
Optimum Communications Inc
OPTU
$316M
| $1.27M | ﹤0.01% |
56,865
+31,995
| +129% | +$835K |
|
1667
CALL
Helen of Troy
HELE
$663M
| $1.27M | ﹤0.01% |
88
+3
| +4% | +$508 |
|
1668
PUT
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.27M | ﹤0.01% |
562
-48
| -8% | -$1.29K |
|
1669
PUT
ArcelorMittal
MT
$50.4B
| $1.26M | ﹤0.01% |
1,354
+697
| +106% | +$9.77K |
|
1670
PUT
ING
ING
$93.8B
| $1.26M | ﹤0.01% |
2,452
+1,941
| +380% | +$18.7K |
|
1671
Tandem Diabetes Care
TNDM
$1.17B
| $1.26M | ﹤0.01% |
19,625
+8,013
| +69% | +$561K |
|
|
SIX
1672
PUT
DELISTED
Six Flags Entertainment Corp.
SIX
| $1.26M | ﹤0.01% |
1,007
+749
| +290% | +$22.3K |
|
|
SAVE
1673
PUT
DELISTED
Spirit Airlines, Inc.
SAVE
| $1.26M | ﹤0.01% |
979
+351
| +56% | +$11.3K |
|
1674
CALL
NetApp
NTAP
$32.9B
| $1.26M | ﹤0.01% |
302
-272
| -47% | -$14.1K |
|
1675
PUT
Ryman Hospitality Properties
RHP
$8.4B
| $1.25M | ﹤0.01% |
350
+343
| +4,900% | +$23.7K |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.