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 | |
|---|---|---|---|---|---|---|
7526
CALL
EverCommerce
EVCM
$2.14B
| $10K | ﹤0.01% |
+1,000
| New | +$9.66K |
|
7527
PUT
Evertec
EVTC
$1.94B
| $10K | ﹤0.01% |
300
-4,600
| -94% | -$162K |
|
7528
Forestar Group
FOR
$1.49B
| $10K | ﹤0.01% |
674
+336
| +99% | +$5.04K |
|
7529
CALL
US Global Investors
GROW
$36.1M
| $10K | ﹤0.01% |
+4,100
| New | +$11.8K |
|
7530
HSBC
HSBC
$356B
| $10K | ﹤0.01% |
+300
| New | +$10.8K |
|
7531
CALL
Investcorp Credit Management BDC
ICMB
$11M
| $10K | ﹤0.01% |
2,900
-1,600
| -36% | -$6.15K |
|
7532
Independent Bank
INDB
$4.11B
| $10K | ﹤0.01% |
+167
| New | +$12.8K |
|
7533
PUT
Ingredion
INGR
$6.46B
| $10K | ﹤0.01% |
100
-1,500
| -94% | -$150K |
|
7534
Independence Realty Trust
IRT
$3.96B
| $10K | ﹤0.01% |
+638
| New | +$11.2K |
|
7535
CALL
Korn Ferry
KFY
$4.25B
| $10K | ﹤0.01% |
+200
| New | +$10.8K |
|
|
LPRO
7536
PUT
Open Lending Corp
LPRO
$373M
| $10K | ﹤0.01% |
1,500
| – | – |
|
|
MESO
7537
PUT
Mesoblast
MESO
$1.87B
| $10K | ﹤0.01% |
1,550
-450
| -23% | -$2.98K |
|
7538
PUT
MarketWise
MKTW
$54.5M
| $10K | ﹤0.01% |
285
+220
| +338% | +$8.84K |
|
7539
CALL
Momentus
MNTS
$85.3M
| $10K | ﹤0.01% |
1
-9
| -90% | -$91.2K |
|
7540
PUT
Marten Transport
MRTN
$1.26B
| $10K | ﹤0.01% |
+500
| New | +$10.6K |
|
|
NAAS
7541
PUT
NaaS Technology Inc
NAAS
$55.9M
| $10K | ﹤0.01% |
+3
| New | +$5.02K |
|
7542
CALL
NovaGold Resources
NG
$2.54B
| $10K | ﹤0.01% |
1,700
-2,600
| -60% | -$15.8K |
|
|
NIU
7543
CALL
Niu Technologies
NIU
$209M
| $10K | ﹤0.01% |
2,500
-14,600
| -85% | -$67.7K |
|
|
NIU
7544
PUT
Niu Technologies
NIU
$209M
| $10K | ﹤0.01% |
2,500
-29,200
| -92% | -$135K |
|
7545
CALL
Enpro
NPO
$6.67B
| $10K | ﹤0.01% |
+100
| New | +$10.9K |
|
7546
CALL
Enviri
NVRI
$620M
| $10K | ﹤0.01% |
+1,600
| New | +$12.1K |
|
7547
CALL
Quanex
NX
$890M
| $10K | ﹤0.01% |
+500
| New | +$12K |
|
7548
Peoples Bancorp
PEBO
$1.51B
| $10K | ﹤0.01% |
+400
| New | +$11.5K |
|
7549
CALL
Preferred Bank
PFBC
$1.25B
| $10K | ﹤0.01% |
200
-500
| -71% | -$33.8K |
|
|
PLYM
7550
CALL
DELISTED
Plymouth Industrial REIT
PLYM
| $10K | ﹤0.01% |
+500
| New | +$10.5K |
|
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.