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 | |
|---|---|---|---|---|---|---|
5451
CALL
National Health Investors
NHI
$3.69B
| $77K | ﹤0.01% |
1,500
+1,000
| +200% | +$54.5K |
|
5452
CALL
Rafael Holdings
RFL
$99.8M
| $77K | ﹤0.01% |
50,396
+39,749
| +373% | +$78.3K |
|
5453
CALL
LendingTree
TREE
$450M
| $77K | ﹤0.01% |
2,900
-1,700
| -37% | -$55.8K |
|
|
TUYA
5454
CALL
Tuya Inc
TUYA
$1.02B
| $77K | ﹤0.01% |
41,100
+40,200
| +4,467% | +$90.8K |
|
5455
Veeco
VECO
$3.07B
| $77K | ﹤0.01% |
3,659
+2,645
| +261% | +$54.4K |
|
5456
PUT
Select Water Solutions
WTTR
$2.32B
| $77K | ﹤0.01% |
+11,100
| New | +$86.4K |
|
5457
PUT
Xometry
XMTR
$4.73B
| $77K | ﹤0.01% |
5,200
+4,600
| +767% | +$121K |
|
|
EPIX
5458
PUT
DELISTED
ESSA Pharma
EPIX
| $76K | ﹤0.01% |
+25,900
| New | +$76.1K |
|
5459
CALL
FirstCash
FCFS
$8.88B
| $76K | ﹤0.01% |
+800
| New | +$72.2K |
|
5460
Fulgent Genetics
FLGT
$484M
| $76K | ﹤0.01% |
+2,465
| New | +$79.3K |
|
5461
PUT
G-III Apparel Group
GIII
$1.54B
| $76K | ﹤0.01% |
4,900
-3,400
| -41% | -$53.3K |
|
5462
Howard Hughes
HHH
$3.83B
| $76K | ﹤0.01% |
+998
| New | +$77.7K |
|
5463
CALL
Horizon Technology Finance
HRZN
$296M
| $76K | ﹤0.01% |
6,800
-7,700
| -53% | -$91.9K |
|
5464
PUT
Oportun Financial
OPRT
$252M
| $76K | ﹤0.01% |
19,700
+17,500
| +795% | +$98.4K |
|
|
BERY
5465
PUT
DELISTED
Berry Global Group, Inc.
BERY
| $76K | ﹤0.01% |
1,416
-9,147
| -87% | -$506K |
|
|
EMAN
5466
CALL
DELISTED
eMagin Corporation
EMAN
| $76K | ﹤0.01% |
+36,900
| New | +$44.4K |
|
|
TUZ
5467
PUT
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $76K | ﹤0.01% |
800
-600
| -43% | -$57K |
|
|
LUNA
5468
CALL
DELISTED
Luna Innovations Incorporated
LUNA
| $76K | ﹤0.01% |
10,600
-6,700
| -39% | -$59.1K |
|
5469
PUT
AquaBounty Technologies
AQB
$4.59M
| $75K | ﹤0.01% |
6,305
+295
| +5% | +$4.75K |
|
|
DRD
5470
CALL
DRDGold
DRD
$1.76B
| $75K | ﹤0.01% |
7,900
-6,100
| -44% | -$48.9K |
|
5471
KNOT Offshore Partners
KNOP
$376M
| $75K | ﹤0.01% |
14,043
+10,248
| +270% | +$65.9K |
|
5472
PUT
LivePerson
LPSN
$22M
| $75K | ﹤0.01% |
1,147
-240
| -17% | -$38.5K |
|
5473
CALL
Procore
PCOR
$8.33B
| $75K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$64.3K |
|
5474
PDS Biotechnology
PDSB
$38.5M
| $75K | ﹤0.01% |
12,279
+555
| +5% | +$4.54K |
|
5475
CALL
SunCoke Energy
SXC
$706M
| $75K | ﹤0.01% |
8,400
-11,400
| -58% | -$104K |
|
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.