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 | |
|---|---|---|---|---|---|---|
1751
CALL
Life Time Group Holdings
LTH
$9.42B
| $2.54M | ﹤0.01% |
159,500
+120,200
| +306% | +$2.06M |
|
1752
CALL
Watsco Inc
WSO
$14.9B
| $2.54M | ﹤0.01% |
+8,000
| New | +$2.35M |
|
1753
CALL
Main Street Capital
MAIN
$4.97B
| $2.54M | ﹤0.01% |
64,400
+44,200
| +219% | +$1.74M |
|
1754
Mercado Libre
MELI
$91.3B
| $2.53M | ﹤0.01% |
+1,923
| New | +$2.19M |
|
1755
CALL
Noble Corp
NE
$6.9B
| $2.53M | ﹤0.01% |
64,200
+53,100
| +478% | +$2.13M |
|
1756
Transocean
RIG
$5.92B
| $2.53M | ﹤0.01% |
397,864
-328,328
| -45% | -$2.11M |
|
1757
Crocs
CROX
$6.69B
| $2.53M | ﹤0.01% |
20,001
-65,322
| -77% | -$7.89M |
|
1758
CALL
Metropolitan Bank Holding Corp
MCB
$1.13B
| $2.53M | ﹤0.01% |
+74,600
| New | +$3.87M |
|
|
COOP
1759
CALL
DELISTED
Mr. Cooper
COOP
| $2.52M | ﹤0.01% |
61,500
+9,800
| +19% | +$430K |
|
1760
PUT
Exelon
EXC
$48.6B
| $2.52M | ﹤0.01% |
60,100
+55,000
| +1,078% | +$2.29M |
|
1761
Loews
L
$24.3B
| $2.52M | ﹤0.01% |
+43,386
| New | +$2.57M |
|
|
LAC
1762
PUT
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $2.52M | ﹤0.01% |
115,600
-23,600
| -17% | -$522K |
|
1763
CALL
Aurinia Pharmaceuticals
AUPH
$1.97B
| $2.51M | ﹤0.01% |
229,200
+8,700
| +4% | +$76.6K |
|
1764
CALL
GFL Environmental
GFL
$14.3B
| $2.51M | ﹤0.01% |
72,900
+55,500
| +319% | +$1.75M |
|
1765
RB Global
RBA
$20.8B
| $2.51M | ﹤0.01% |
44,542
+33,249
| +294% | +$1.96M |
|
1766
PUT
Arbor Realty Trust
ABR
$960M
| $2.5M | ﹤0.01% |
218,000
+137,100
| +169% | +$1.9M |
|
1767
iShares 1-3 Year Treasury Bond ETF
SHY
$25.4B
| $2.5M | ﹤0.01% |
+30,484
| New | +$2.48M |
|
1768
CALL
Algoma Steel
ASTL
$455M
| $2.5M | ﹤0.01% |
309,600
+291,300
| +1,592% | +$2.23M |
|
1769
CALL
Rapid7
RPD
$634M
| $2.48M | ﹤0.01% |
54,100
+52,500
| +3,281% | +$2.23M |
|
1770
PUT
2x Long VIX Futures ETF
UVIX
$286M
| $2.48M | ﹤0.01% |
76
+70
| +1,167% | +$2.85M |
|
1771
CALL
Guardant Health
GH
$19.5B
| $2.47M | ﹤0.01% |
105,400
-111,600
| -51% | -$3.19M |
|
1772
Sibanye-Stillwater
SBSW
$5.92B
| $2.47M | ﹤0.01% |
296,888
+227,339
| +327% | +$2.21M |
|
1773
Papa John's
PZZA
$999M
| $2.46M | ﹤0.01% |
32,894
+19,238
| +141% | +$1.63M |
|
1774
PUT
Sempra
SRE
$60.8B
| $2.46M | ﹤0.01% |
32,600
+14,800
| +83% | +$1.14M |
|
|
ARCH
1775
CALL
DELISTED
Arch Resources, Inc.
ARCH
| $2.46M | ﹤0.01% |
18,700
-88,000
| -82% | -$12.7M |
|
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.