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 | |
|---|---|---|---|---|---|---|
5476
TFS Financial
TFSL
$5.16B
| $75K | ﹤0.01% |
+5,978
| New | +$83.5K |
|
5477
CALL
Vicor
VICR
$9.56B
| $75K | ﹤0.01% |
1,600
-1,700
| -52% | -$94.3K |
|
5478
Vanguard Mortgage-Backed Securities ETF
VMBS
$15.4B
| $75K | ﹤0.01% |
1,619
-930
| -36% | -$43.2K |
|
5479
CALL
Advanced Drainage Systems
WMS
$10.6B
| $75K | ﹤0.01% |
900
-900
| -50% | -$79.2K |
|
|
KNTE
5480
DELISTED
Kinnate Biopharma Inc. Common Stock
KNTE
| $75K | ﹤0.01% |
12,089
+11,501
| +1,956% | +$70.1K |
|
5481
Agilon Health
AGL
$1.53B
| $74K | ﹤0.01% |
+125
| New | +$70K |
|
5482
American Public Education
APEI
$890M
| $74K | ﹤0.01% |
+13,718
| New | +$144K |
|
5483
PUT
Beam Global
BEEM
$23.3M
| $74K | ﹤0.01% |
4,700
-900
| -16% | -$14.9K |
|
|
CADE
5484
CALL
DELISTED
Cadence Bank
CADE
| $74K | ﹤0.01% |
3,600
+3,100
| +620% | +$77.1K |
|
5485
CALL
Cue Biopharma
CUE
$113M
| $74K | ﹤0.01% |
693
-177
| -20% | -$16.9K |
|
5486
Designer Brands
DBI
$307M
| $74K | ﹤0.01% |
8,471
-951
| -10% | -$9.13K |
|
5487
ProShares Ultra Dow30
DDM
$542M
| $74K | ﹤0.01% |
2,332
-4,478
| -66% | -$143K |
|
5488
PUT
Definitive Healthcare
DH
$72M
| $74K | ﹤0.01% |
7,200
+7,100
| +7,100% | +$83.6K |
|
5489
PUT
Horizon Technology Finance
HRZN
$295M
| $74K | ﹤0.01% |
6,600
-6,000
| -48% | -$71.6K |
|
5490
International Seaways
INSW
$4.76B
| $74K | ﹤0.01% |
1,787
-2,887
| -62% | -$122K |
|
|
KREF
5491
PUT
KKR Real Estate Finance Trust
KREF
$448M
| $74K | ﹤0.01% |
6,500
+2,700
| +71% | +$37.9K |
|
5492
PUT
Precigen
PGEN
$2.24B
| $74K | ﹤0.01% |
70,200
+30,800
| +78% | +$44.4K |
|
5493
CALL
Snap-on
SNA
$21.2B
| $74K | ﹤0.01% |
300
+200
| +200% | +$48.8K |
|
|
VGR
5494
CALL
DELISTED
Vector Group Ltd.
VGR
| $74K | ﹤0.01% |
6,200
-12,900
| -68% | -$163K |
|
5495
AMC Global Media
AMCX
$492M
| $73K | ﹤0.01% |
4,159
+3,556
| +590% | +$66.5K |
|
5496
Eldorado Gold
EGO
$7.87B
| $73K | ﹤0.01% |
+7,138
| New | +$66.5K |
|
5497
iShares Expanded Tech Sector ETF
IGM
$10B
| $73K | ﹤0.01% |
1,302
+552
| +74% | +$28.8K |
|
5498
PUT
Regency Centers
REG
$14.7B
| $73K | ﹤0.01% |
1,200
| – | – |
|
5499
CALL
Red Robin
RRGB
$145M
| $73K | ﹤0.01% |
5,100
+4,300
| +538% | +$43.6K |
|
5500
Vera Therapeutics
VERA
$2.3B
| $73K | ﹤0.01% |
+9,492
| New | +$73.3K |
|
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.