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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1901
CALL
Manulife Financial
MFC
$72.6B
| $2.13M | ﹤0.01% |
115,900
+68,300
| +143% | +$1.3M |
|
1902
CALL
HDFC Bank
HDB
$119B
| $2.13M | ﹤0.01% |
63,800
+34,200
| +116% | +$1.14M |
|
1903
PUT
Wendy's
WEN
$1.33B
| $2.13M | ﹤0.01% |
97,600
+92,200
| +1,707% | +$2.03M |
|
|
HBI
1904
PUT
DELISTED
Hanesbrands
HBI
| $2.12M | ﹤0.01% |
403,900
+117,700
| +41% | +$740K |
|
1905
Direxion Daily FTSE China Bull 3X ETF
YINN
$660M
| $2.12M | ﹤0.01% |
+44,655
| New | +$2.37M |
|
1906
State Street Health Care Select Sector SPDR ETF
XLV
$42.1B
| $2.12M | ﹤0.01% |
16,373
-1,912
| -10% | -$250K |
|
1907
CALL
Willis Towers Watson
WTW
$27.9B
| $2.11M | ﹤0.01% |
9,100
-34,400
| -79% | -$8.32M |
|
1908
Humana
HUM
$46.7B
| $2.1M | ﹤0.01% |
+4,336
| New | +$2.14M |
|
1909
iShares MSCI Singapore ETF
EWS
$1.01B
| $2.1M | ﹤0.01% |
105,990
+15,228
| +17% | +$297K |
|
|
DQ
1910
Daqo New Energy
DQ
$790M
| $2.1M | ﹤0.01% |
44,872
+12,746
| +40% | +$586K |
|
1911
CALL
2x Long VIX Futures ETF
UVIX
$286M
| $2.1M | ﹤0.01% |
65
+50
| +333% | +$2.03M |
|
1912
CALL
Weatherford International
WFRD
$6.36B
| $2.1M | ﹤0.01% |
35,400
+31,400
| +785% | +$1.84M |
|
1913
PUT
Olin
OLN
$2.64B
| $2.1M | ﹤0.01% |
37,800
-12,100
| -24% | -$693K |
|
|
NVRO
1914
PUT
DELISTED
NEVRO CORP.
NVRO
| $2.1M | ﹤0.01% |
58,000
+51,400
| +779% | +$1.81M |
|
1915
Veeva Systems
VEEV
$30.3B
| $2.1M | ﹤0.01% |
11,401
-12,175
| -52% | -$2.08M |
|
1916
CALL
Canadian Solar
CSIQ
$906M
| $2.09M | ﹤0.01% |
52,600
-145,600
| -73% | -$5.78M |
|
|
ABB
1917
PUT
DELISTED
ABB Ltd
ABB
| $2.09M | ﹤0.01% |
61,000
-34,700
| -36% | -$1.16M |
|
1918
Twilio
TWLO
$29.1B
| $2.09M | ﹤0.01% |
31,381
-36,445
| -54% | -$2.25M |
|
1919
CALL
Vermilion Energy
VET
$1.73B
| $2.09M | ﹤0.01% |
161,000
+3,000
| +2% | +$42.3K |
|
|
KRTX
1920
PUT
DELISTED
Karuna Therapeutics, Inc. Common Stock
KRTX
| $2.09M | ﹤0.01% |
11,500
-5,700
| -33% | -$1.09M |
|
1921
PUT
OneMain Financial
OMF
$6.9B
| $2.08M | ﹤0.01% |
56,200
+40,900
| +267% | +$1.64M |
|
|
BCYC
1922
CALL
Bicycle Therapeutics
BCYC
$270M
| $2.08M | ﹤0.01% |
97,800
+96,500
| +7,423% | +$2.42M |
|
1923
PUT
Marriott Vacations Worldwide
VAC
$3.24B
| $2.08M | ﹤0.01% |
15,400
+11,200
| +267% | +$1.66M |
|
1924
PUT
Copart
CPRT
$25.9B
| $2.08M | ﹤0.01% |
55,200
+14,600
| +36% | +$496K |
|
1925
CALL
American Homes 4 Rent
AMH
$12B
| $2.07M | ﹤0.01% |
65,900
+64,900
| +6,490% | +$2.07M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.