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 | |
|---|---|---|---|---|---|---|
3476
Invesco KBW Bank ETF
KBWB
$6.88B
| $408K | ﹤0.01% |
9,738
+8,814
| +954% | +$461K |
|
3477
PUT
Magnite
MGNI
$2.73B
| $408K | ﹤0.01% |
44,100
+28,600
| +185% | +$305K |
|
3478
PUT
Meritage Homes
MTH
$4.89B
| $408K | ﹤0.01% |
7,000
-1,400
| -17% | -$75.3K |
|
|
TBCH
3479
PUT
Turtle Beach Corp
TBCH
$245M
| $408K | ﹤0.01% |
40,800
+16,800
| +70% | +$143K |
|
3480
CALL
Mid-America Apartment Communities
MAA
$15.5B
| $407K | ﹤0.01% |
2,700
+600
| +29% | +$95.1K |
|
3481
Old National Bancorp
ONB
$10.1B
| $407K | ﹤0.01% |
28,292
+7,080
| +33% | +$120K |
|
3482
Simplify Interest Rate Hedge ETF
PFIX
$168M
| $407K | ﹤0.01% |
+6,681
| New | +$423K |
|
3483
CALL
Tiptree Inc
TIPT
$678M
| $407K | ﹤0.01% |
28,000
+21,100
| +306% | +$321K |
|
3484
Cal-Maine
CALM
$4.2B
| $406K | ﹤0.01% |
6,679
-10,784
| -62% | -$601K |
|
3485
CALL
Credo Technology Group
CRDO
$38.8B
| $406K | ﹤0.01% |
43,200
+16,000
| +59% | +$202K |
|
3486
CALL
SouthState Bank Corp
SSB
$10.2B
| $406K | ﹤0.01% |
+5,700
| New | +$444K |
|
3487
Amplify Energy
AMPY
$155M
| $405K | ﹤0.01% |
58,962
-5,971
| -9% | -$49K |
|
3488
PUT
Bain Capital Specialty
BCSF
$815M
| $405K | ﹤0.01% |
34,000
-32,200
| -49% | -$411K |
|
3489
Digimarc Corp
DMRC
$137M
| $405K | ﹤0.01% |
20,626
-27,026
| -57% | -$545K |
|
3490
PUT
Vaalco Energy
EGY
$552M
| $405K | ﹤0.01% |
90,400
+84,700
| +1,486% | +$387K |
|
3491
PUT
Leidos
LDOS
$14.5B
| $405K | ﹤0.01% |
4,400
+2,700
| +159% | +$261K |
|
3492
CALL
News Corp Class B
NWS
$16.8B
| $405K | ﹤0.01% |
23,500
+1,200
| +5% | +$22.2K |
|
3493
CALL
Oscar Health
OSCR
$8.54B
| $405K | ﹤0.01% |
62,000
+41,700
| +205% | +$170K |
|
|
PCH
3494
PUT
DELISTED
PotlatchDeltic
PCH
| $405K | ﹤0.01% |
8,200
| – | – |
|
|
GOEV
3495
PUT
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $405K | ﹤0.01% |
1,349
-452
| -25% | -$192K |
|
|
ESMT
3496
DELISTED
EngageSmart, Inc.
ESMT
| $405K | ﹤0.01% |
21,049
+19,571
| +1,324% | +$379K |
|
3497
Parker-Hannifin
PH
$124B
| $403K | ﹤0.01% |
+1,201
| New | +$398K |
|
3498
Sigma Lithium
SGML
$1.12B
| $403K | ﹤0.01% |
10,737
+2,904
| +37% | +$93.1K |
|
3499
PUT
Semtech
SMTC
$11.3B
| $403K | ﹤0.01% |
16,700
+14,900
| +828% | +$466K |
|
|
TWNK
3500
CALL
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $403K | ﹤0.01% |
16,200
+7,700
| +91% | +$181K |
|
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.