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 | |
|---|---|---|---|---|---|---|
|
MNDT
976
CALL
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $3.08M | 0.01% |
2,911
+971
| +50% | +$14K |
|
977
CALL
Fidelity National Information Services
FIS
$20.7B
| $3.08M | 0.01% |
253
+69
| +38% | +$9.58K |
|
|
LSI
978
DELISTED
Life Storage, Inc.
LSI
| $3.08M | 0.01% |
48,797
+35,186
| +259% | +$2.51M |
|
979
United States Natural Gas Fund
UNG
$473M
| $3.06M | 0.01% |
61,029
-70,409
| -54% | -$4.09M |
|
980
PUT
Dominion Energy
D
$62.8B
| $3.06M | 0.01% |
424
-14
| -3% | -$1.14K |
|
|
DFS
981
CALL
DELISTED
Discover Financial Services
DFS
| $3.06M | 0.01% |
858
+584
| +213% | +$38.7K |
|
982
PUT
Globus Medical
GMED
$10.2B
| $3.02M | 0.01% |
710
+174
| +32% | +$8.6K |
|
983
PUT
Duke Energy
DUK
$101B
| $3.02M | 0.01% |
373
+47
| +14% | +$4.32K |
|
984
CALL
National Health Investors
NHI
$3.88B
| $3.01M | 0.01% |
608
+115
| +23% | +$8.73K |
|
985
PUT
Etsy
ETSY
$7.67B
| $3.01M | 0.01% |
782
-205
| -21% | -$10K |
|
986
PUT
Wheaton Precious Metals
WPM
$50B
| $3.01M | 0.01% |
1,092
+375
| +52% | +$10.8K |
|
|
987
CALL
United States Natural Gas Fund
UNG
$473M
| $3M | 0.01% |
599
-942
| -61% | -$54.7K |
|
988
PUT
Mid-America Apartment Communities
MAA
$15.4B
| $3M | 0.01% |
291
+30
| +11% | +$3.9K |
|
989
PUT
NetApp
NTAP
$32.3B
| $3M | 0.01% |
719
+11
| +2% | +$569 |
|
990
CALL
Equity Residential
EQR
$25.6B
| $2.99M | 0.01% |
485
-300
| -38% | -$23.2K |
|
|
GOOS
991
CALL
Canada Goose Holdings
GOOS
$896M
| $2.99M | 0.01% |
1,503
+863
| +135% | +$24.1K |
|
992
Tyson Foods
TSN
$20B
| $2.98M | 0.01% |
51,580
+23,473
| +84% | +$1.75M |
|
993
Equinix
EQIX
$102B
| $2.98M | 0.01% |
+4,776
| New | +$2.86M |
|
994
CALL
International Flavors & Fragrances
IFF
$18.8B
| $2.98M | 0.01% |
292
-182
| -38% | -$22.7K |
|
995
CALL
Hasbro
HAS
$12.4B
| $2.98M | 0.01% |
416
+122
| +41% | +$10.6K |
|
996
PUT
Halliburton
HAL
$27.3B
| $2.97M | 0.01% |
4,341
+2,418
| +126% | +$42.1K |
|
|
CSOD
997
CALL
DELISTED
Cornerstone OnDemand, Inc.
CSOD
| $2.96M | 0.01% |
932
+646
| +226% | +$31.5K |
|
998
Dropbox
DBX
$6.63B
| $2.96M | 0.01% |
163,342
+159,903
| +4,650% | +$2.91M |
|
999
PUT
HCA Healthcare
HCA
$83.6B
| $2.96M | 0.01% |
329
-880
| -73% | -$114K |
|
|
BBBY
1000
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $2.95M | 0.01% |
7,004
+2,133
| +44% | +$24.8K |
|
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.