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 | |
|---|---|---|---|---|---|---|
|
BRSP
6751
BrightSpire Capital
BRSP
$633M
| $23K | ﹤0.01% |
4,056
+3,573
| +740% | +$24.5K |
|
|
BRY
6752
PUT
DELISTED
Berry Corp
BRY
| $23K | ﹤0.01% |
3,000
-4,600
| -61% | -$39.9K |
|
6753
CALL
CareDx
CDNA
$1.97B
| $23K | ﹤0.01% |
2,600
+2,400
| +1,200% | +$30.7K |
|
6754
ClearPoint Neuro
CLPT
$437M
| $23K | ﹤0.01% |
2,736
-3,148
| -54% | -$27.6K |
|
6755
PUT
Core & Main
CNM
$8.15B
| $23K | ﹤0.01% |
1,000
-1,800
| -64% | -$39.6K |
|
6756
PUT
CenterPoint Energy
CNP
$27.8B
| $23K | ﹤0.01% |
800
-14,000
| -95% | -$409K |
|
6757
CALL
Columbia Banking Systems
COLB
$8.84B
| $23K | ﹤0.01% |
+1,100
| New | +$30.5K |
|
6758
CALL
Cumberland Pharmaceuticals
CPIX
$101M
| $23K | ﹤0.01% |
+12,100
| New | +$28.8K |
|
6759
CALL
Crescent Energy
CRGY
$3.69B
| $23K | ﹤0.01% |
2,100
-1,700
| -45% | -$19.7K |
|
6760
Direxion Daily MSCI Emerging Markets Bear 3X ETF
EDZ
$18.8M
| $23K | ﹤0.01% |
+192
| New | +$23.7K |
|
6761
PUT
VanEck Energy Income ETF
EINC
$77.9M
| $23K | ﹤0.01% |
800
-4,700
| -85% | -$291K |
|
6762
PUT
Eversource Energy
ES
$27.8B
| $23K | ﹤0.01% |
300
-1,000
| -77% | -$79K |
|
6763
PUT
Element Solutions
ESI
$8.68B
| $23K | ﹤0.01% |
1,200
-400
| -25% | -$7.89K |
|
6764
Vertical Aerospace
EVTL
$166M
| $23K | ﹤0.01% |
1,098
-134
| -11% | -$2.8K |
|
6765
CALL
Full House Resorts
FLL
$79.4M
| $23K | ﹤0.01% |
3,300
+2,000
| +154% | +$17.2K |
|
6766
PUT
Flux Power
FLUX
$11.5M
| $23K | ﹤0.01% |
4,900
-1,200
| -20% | -$6.69K |
|
6767
PUT
Humacyte
HUMA
$181M
| $23K | ﹤0.01% |
7,600
+5,900
| +347% | +$16.8K |
|
6768
PUT
IDEX
IEX
$17.3B
| $23K | ﹤0.01% |
100
-8,100
| -99% | -$1.84M |
|
6769
InflaRx
IFRX
$253M
| $23K | ﹤0.01% |
12,044
-16,846
| -58% | -$36.4K |
|
|
INZY
6770
DELISTED
Inozyme Pharma
INZY
| $23K | ﹤0.01% |
4,181
+4,044
| +2,952% | +$10.7K |
|
6771
PUT
Karyopharm Therapeutics
KPTI
$159M
| $23K | ﹤0.01% |
407
-940
| -70% | -$46.4K |
|
|
KZR
6772
DELISTED
Kezar Life Sciences
KZR
| $23K | ﹤0.01% |
+745
| New | +$43.1K |
|
6773
CALL
Local Bounti
LOCL
$23.3M
| $23K | ﹤0.01% |
2,262
-1,607
| -42% | -$17.2K |
|
6774
MiMedx Group
MDXG
$636M
| $23K | ﹤0.01% |
6,998
-11,809
| -63% | -$45.7K |
|
6775
CALL
MeiraGTx Holdings
MGTX
$1.11B
| $23K | ﹤0.01% |
4,600
+2,300
| +100% | +$15.9K |
|
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.