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 | |
|---|---|---|---|---|---|---|
1551
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $3.32M | ﹤0.01% |
73,500
-2,300
| -3% | -$112K |
|
1552
PUT
McCormick & Company Non-Voting
MKC
$13.4B
| $3.32M | ﹤0.01% |
39,900
+27,000
| +209% | +$2.06M |
|
1553
PUT
ING
ING
$93.8B
| $3.31M | ﹤0.01% |
279,100
-6,900
| -2% | -$91.3K |
|
1554
CALL
Helen of Troy
HELE
$663M
| $3.3M | ﹤0.01% |
34,700
-12,900
| -27% | -$1.38M |
|
|
GOOS
1555
CALL
Canada Goose Holdings
GOOS
$868M
| $3.3M | ﹤0.01% |
171,500
+5,300
| +3% | +$105K |
|
1556
PUT
Inspire Medical Systems
INSP
$1.42B
| $3.3M | ﹤0.01% |
14,100
+11,200
| +386% | +$2.83M |
|
|
MRSH
1557
CALL
Marsh
MRSH
$86.3B
| $3.3M | ﹤0.01% |
19,800
+10,700
| +118% | +$1.78M |
|
|
HBI
1558
DELISTED
Hanesbrands
HBI
| $3.29M | ﹤0.01% |
625,152
+536,377
| +604% | +$3.37M |
|
|
CFLT
1559
PUT
DELISTED
Confluent
CFLT
| $3.29M | ﹤0.01% |
136,600
-40,900
| -23% | -$948K |
|
1560
CALL
Bumble
BMBL
$367M
| $3.29M | ﹤0.01% |
168,100
+59,400
| +55% | +$1.34M |
|
1561
Vanguard Russell 2000 Growth ETF
VTWG
$1.47B
| $3.29M | ﹤0.01% |
19,914
-2,160
| -10% | -$359K |
|
1562
Western Digital
WDC
$179B
| $3.29M | ﹤0.01% |
+115,419
| New | +$3.39M |
|
|
SRG
1563
CALL
Seritage Growth Properties
SRG
$130M
| $3.28M | ﹤0.01% |
416,700
+309,600
| +289% | +$3.43M |
|
1564
KeyCorp
KEY
$24.3B
| $3.28M | ﹤0.01% |
+261,713
| New | +$4.42M |
|
1565
CALL
TG Therapeutics
TGTX
$8.58B
| $3.26M | ﹤0.01% |
216,800
-313,500
| -59% | -$4.76M |
|
1566
PUT
WD-40
WDFC
$3.1B
| $3.26M | ﹤0.01% |
18,300
+17,400
| +1,933% | +$3M |
|
1567
PUT
Masco
MAS
$16B
| $3.24M | ﹤0.01% |
65,100
-37,400
| -36% | -$1.93M |
|
1568
PUT
Charles River Laboratories
CRL
$10.9B
| $3.23M | ﹤0.01% |
16,000
+2,000
| +14% | +$453K |
|
1569
CALL
Interactive Brokers
IBKR
$40.9B
| $3.23M | ﹤0.01% |
156,400
-176,000
| -53% | -$3.58M |
|
1570
PUT
PVH
PVH
$3.71B
| $3.23M | ﹤0.01% |
36,200
-42,400
| -54% | -$3.46M |
|
1571
Vanguard Growth ETF
VUG
$216B
| $3.22M | ﹤0.01% |
+77,556
| New | +$3.02M |
|
1572
PUT
Wheaton Precious Metals
WPM
$50.6B
| $3.22M | ﹤0.01% |
66,900
-164,400
| -71% | -$7.19M |
|
1573
AGNC Investment
AGNC
$12.3B
| $3.22M | ﹤0.01% |
319,177
-42,361
| -12% | -$461K |
|
1574
PUT
FIVE9
FIVN
$1.77B
| $3.22M | ﹤0.01% |
44,500
-10,200
| -19% | -$730K |
|
1575
PUT
Voya Financial
VOYA
$8.94B
| $3.21M | ﹤0.01% |
45,000
+44,300
| +6,329% | +$3.1M |
|
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.