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 | |
|---|---|---|---|---|---|---|
|
NATI
1451
PUT
DELISTED
National Instruments Corp
NATI
| $3.96M | ﹤0.01% |
75,600
+72,800
| +2,600% | +$3.65M |
|
1452
PUT
Markel Group
MKL
$25B
| $3.96M | ﹤0.01% |
3,100
-200
| -6% | -$266K |
|
1453
CALL
Alcon
ALC
$33.1B
| $3.96M | ﹤0.01% |
56,100
-11,500
| -17% | -$818K |
|
1454
Energy Transfer Partners
ET
$70.1B
| $3.95M | ﹤0.01% |
316,896
-80,390
| -20% | -$1.02M |
|
1455
CALL
argenx
ARGX
$57.5B
| $3.95M | ﹤0.01% |
10,600
-7,000
| -40% | -$2.59M |
|
1456
PUT
Kinross Gold
KGC
$28.5B
| $3.95M | ﹤0.01% |
838,200
-250,900
| -23% | -$1.06M |
|
1457
CALL
Aehr Test Systems
AEHR
$2.48B
| $3.94M | ﹤0.01% |
127,000
-94,600
| -43% | -$3.05M |
|
1458
CALL
InMode
INMD
$873M
| $3.94M | ﹤0.01% |
123,200
-55,200
| -31% | -$1.89M |
|
1459
PUT
Clear Secure
YOU
$5.26B
| $3.92M | ﹤0.01% |
149,800
+146,900
| +5,066% | +$4.17M |
|
|
SGEN
1460
PUT
DELISTED
Seagen Inc. Common Stock
SGEN
| $3.91M | ﹤0.01% |
19,300
+15,200
| +371% | +$2.44M |
|
|
OSH
1461
PUT
DELISTED
Oak Street Health, Inc.
OSH
| $3.91M | ﹤0.01% |
101,000
-64,700
| -39% | -$2.09M |
|
1462
CALL
Ares Capital
ARCC
$13.5B
| $3.9M | ﹤0.01% |
213,400
+75,400
| +55% | +$1.43M |
|
1463
Trade Desk
TTD
$8.13B
| $3.9M | ﹤0.01% |
64,026
+62,426
| +3,902% | +$3.32M |
|
1464
CALL
Essential Utilities
WTRG
$11.2B
| $3.9M | ﹤0.01% |
89,300
+86,700
| +3,335% | +$3.91M |
|
1465
CALL
Brookfield
BN
$102B
| $3.88M | ﹤0.01% |
+181,650
| New | +$4.09M |
|
|
K
1466
PUT
DELISTED
Kellanova
K
| $3.88M | ﹤0.01% |
61,770
-156,875
| -72% | -$9.91M |
|
1467
e.l.f. Beauty
ELF
$4.56B
| $3.87M | ﹤0.01% |
46,998
+44,544
| +1,815% | +$3M |
|
|
EDR
1468
CALL
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $3.85M | ﹤0.01% |
160,900
+66,600
| +71% | +$1.48M |
|
1469
CALL
KeyCorp
KEY
$24.3B
| $3.85M | ﹤0.01% |
307,200
+103,600
| +51% | +$1.75M |
|
1470
CALL
LegalZoom.com
LZ
$1.23B
| $3.83M | ﹤0.01% |
408,800
+162,500
| +66% | +$1.38M |
|
|
FTCH
1471
CALL
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $3.82M | ﹤0.01% |
778,100
-476,500
| -38% | -$2.59M |
|
|
DISH
1472
DELISTED
DISH Network Corp.
DISH
| $3.82M | ﹤0.01% |
+409,253
| New | +$5.16M |
|
1473
PUT
Regions Financial
RF
$26.3B
| $3.81M | ﹤0.01% |
205,200
+54,400
| +36% | +$1.18M |
|
1474
PUT
MSCI
MSCI
$40B
| $3.81M | ﹤0.01% |
6,800
-2,800
| -29% | -$1.48M |
|
1475
PUT
Fluor
FLR
$7.29B
| $3.8M | ﹤0.01% |
123,000
-19,400
| -14% | -$667K |
|
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.