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 | |
|---|---|---|---|---|---|---|
|
AEVA
6376
Aeva Technologies
AEVA
$1.2B
| $33K | ﹤0.01% |
5,585
-1,315
| -19% | -$10.5K |
|
|
GOLD
6377
Gold.com Inc
GOLD
$1.2B
| $33K | ﹤0.01% |
976
-6,098
| -86% | -$203K |
|
6378
PUT
Atmos Energy
ATO
$28.8B
| $33K | ﹤0.01% |
300
+200
| +200% | +$22.7K |
|
6379
Blackrock
BLK
$169B
| $33K | ﹤0.01% |
50
| – | – |
|
6380
PUT
Cardlytics
CDLX
$21.7M
| $33K | ﹤0.01% |
990
+230
| +30% | +$12K |
|
6381
PUT
Cemex
CX
$17.1B
| $33K | ﹤0.01% |
6,000
+200
| +3% | +$1.02K |
|
6382
Crane NXT
CXT
$2.99B
| $33K | ﹤0.01% |
+852
| New | +$33.7K |
|
|
ETWO
6383
CALL
DELISTED
E2open Parent Holdings
ETWO
| $33K | ﹤0.01% |
5,800
+3,000
| +107% | +$18.1K |
|
6384
CALL
CapForce IBD 50 ETF
FFTY
$79.5M
| $33K | ﹤0.01% |
+1,400
| New | +$32.2K |
|
6385
CALL
Invesco CurrencyShares Australian Dollar Trust
FXA
$97.6M
| $33K | ﹤0.01% |
500
-7,400
| -94% | -$501K |
|
6386
Harmonic Inc
HLIT
$1.25B
| $33K | ﹤0.01% |
2,287
-367
| -14% | -$5.06K |
|
6387
PUT
Holley
HLLY
$321M
| $33K | ﹤0.01% |
12,300
+6,900
| +128% | +$17.6K |
|
6388
PUT
Haleon
HLN
$43.5B
| $33K | ﹤0.01% |
4,100
-600
| -13% | -$4.78K |
|
6389
International General Insurance
IGIC
$1.19B
| $33K | ﹤0.01% |
4,056
-11
| -0.3% | -$91 |
|
6390
PUT
Liberty Global Class C
LBTYK
$3.53B
| $33K | ﹤0.01% |
1,700
-4,000
| -70% | -$84.2K |
|
6391
CALL
Lincoln Electric
LECO
$14.2B
| $33K | ﹤0.01% |
200
-100
| -33% | -$16.5K |
|
6392
Liquidia Corp
LQDA
$7.48B
| $33K | ﹤0.01% |
4,893
-5,650
| -54% | -$38.6K |
|
6393
CALL
Malibu Boats
MBUU
$541M
| $33K | ﹤0.01% |
600
+500
| +500% | +$29.2K |
|
|
MODV
6394
PUT
DELISTED
ModivCare
MODV
| $33K | ﹤0.01% |
+400
| New | +$38.5K |
|
|
MOMO
6395
Hello Group
MOMO
$885M
| $33K | ﹤0.01% |
3,693
-10,776
| -74% | -$103K |
|
|
MRC
6396
DELISTED
MRC Global
MRC
| $33K | ﹤0.01% |
+3,454
| New | +$39.2K |
|
6397
Bank of N.T. Butterfield & Son
NTB
$2.43B
| $33K | ﹤0.01% |
1,258
+1,223
| +3,494% | +$39K |
|
6398
PUT
FreightCar America
RAIL
$261M
| $33K | ﹤0.01% |
10,600
-7,300
| -41% | -$25.2K |
|
6399
Sturm, Ruger & Co
RGR
$594M
| $33K | ﹤0.01% |
578
-5,571
| -91% | -$311K |
|
6400
State Street SPDR Dow Jones International Real Estate ETF
RWX
$269M
| $33K | ﹤0.01% |
+1,279
| New | +$34.9K |
|
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.