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 | |
|---|---|---|---|---|---|---|
7276
CALL
Federal Agricultural Mortgage Class A
AGM.A
| $13K | ﹤0.01% |
100
-1,800
| -95% | -$202K |
|
7277
AMC Entertainment Holdings
AMC
$2.34B
| $13K | ﹤0.01% |
270
-380
| -58% | -$20.1K |
|
7278
APi Group
APG
$16.6B
| $13K | ﹤0.01% |
872
-6,295
| -88% | -$90.4K |
|
7279
PUT
A10 Networks
ATEN
$2.15B
| $13K | ﹤0.01% |
900
-4,900
| -84% | -$74.8K |
|
7280
CALL
Autohome
ATHM
$2.61B
| $13K | ﹤0.01% |
400
-700
| -64% | -$23.6K |
|
7281
PUT
Aviat Networks
AVNW
$259M
| $13K | ﹤0.01% |
400
| – | – |
|
7282
CALL
Brink's
BCO
$4.94B
| $13K | ﹤0.01% |
200
-400
| -67% | -$25.4K |
|
7283
VanEck BDC Income ETF
BIZD
$1.62B
| $13K | ﹤0.01% |
895
+501
| +127% | +$7.52K |
|
|
BPMC
7284
DELISTED
Blueprint Medicines
BPMC
| $13K | ﹤0.01% |
+290
| New | +$13.1K |
|
|
BRFS
7285
DELISTED
BRF SA
BRFS
| $13K | ﹤0.01% |
+10,270
| New | +$14.4K |
|
7286
PUT
Santander
BSBR
$38.5B
| $13K | ﹤0.01% |
2,600
+2,200
| +550% | +$11.9K |
|
7287
CALL
Cato Corp
CATO
$66.1M
| $13K | ﹤0.01% |
1,500
-400
| -21% | -$3.78K |
|
7288
CALL
CBAK Energy Technology Ltd
CBAT
$43M
| $13K | ﹤0.01% |
15,100
-10,900
| -42% | -$11.3K |
|
7289
Core Alternative Capital
CCOR
$28.2M
| $13K | ﹤0.01% |
+458
| New | +$14K |
|
7290
CALL
Cognyte Software
CGNT
$662M
| $13K | ﹤0.01% |
4,000
-300
| -7% | -$1.08K |
|
7291
Chord Energy
CHRD
$7.58B
| $13K | ﹤0.01% |
100
| – | – |
|
7292
Digi International
DGII
$2.46B
| $13K | ﹤0.01% |
+386
| New | +$13.2K |
|
|
EARN
7293
PUT
Ellington Residential Mortgage REIT
EARN
$167M
| $13K | ﹤0.01% |
1,900
+1,500
| +375% | +$11.4K |
|
7294
PUT
StealthGas
GASS
$329M
| $13K | ﹤0.01% |
+5,000
| New | +$13.8K |
|
7295
PUT
Golub Capital BDC
GBDC
$3.37B
| $13K | ﹤0.01% |
1,000
+800
| +400% | +$10.8K |
|
7296
Genius Group
GNS
$29M
| $13K | ﹤0.01% |
+995
| New | +$33.9K |
|
7297
PUT
Home BancShares
HOMB
$6.33B
| $13K | ﹤0.01% |
600
| – | – |
|
7298
iShares US Healthcare Providers ETF
IHF
$1.23B
| $13K | ﹤0.01% |
+270
| New | +$13.9K |
|
7299
INmune Bio
INMB
$45.7M
| $13K | ﹤0.01% |
2,140
-667
| -24% | -$5.37K |
|
7300
Jakks Pacific
JAKK
$298M
| $13K | ﹤0.01% |
+778
| New | +$14.6K |
|
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.