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 | |
|---|---|---|---|---|---|---|
4401
CALL
Navigator Holdings
NVGS
$1.34B
| $187K | ﹤0.01% |
13,400
-5,000
| -27% | -$64.8K |
|
4402
PUT
Palomar
PLMR
$3.84B
| $187K | ﹤0.01% |
+3,400
| New | +$182K |
|
4403
PUT
UGI
UGI
$7.9B
| $187K | ﹤0.01% |
5,400
-1,100
| -17% | -$41.7K |
|
4404
CALL
Viper Energy
VNOM
$8.45B
| $187K | ﹤0.01% |
6,700
-16,000
| -70% | -$480K |
|
4405
CALL
BGC Group
BGC
$5.69B
| $186K | ﹤0.01% |
35,600
-142,900
| -80% | -$655K |
|
4406
CALL
BJ's Restaurants
BJRI
$1.48B
| $186K | ﹤0.01% |
+6,400
| New | +$200K |
|
4407
Cavco Industries
CVCO
$4.4B
| $186K | ﹤0.01% |
+588
| New | +$163K |
|
4408
PUT
GXO Logistics
GXO
$5.92B
| $186K | ﹤0.01% |
3,700
-79,200
| -96% | -$3.94M |
|
4409
Lifecore Biomedical
LFCR
$161M
| $186K | ﹤0.01% |
49,401
+38,527
| +354% | +$215K |
|
4410
CALL
Power Integrations
POWI
$3.16B
| $186K | ﹤0.01% |
2,200
-9,900
| -82% | -$822K |
|
4411
Ribbon Communications
RBBN
$386M
| $186K | ﹤0.01% |
54,558
+54,549
| +606,100% | +$199K |
|
|
SOND
4412
CALL
DELISTED
Sonder
SOND
| $186K | ﹤0.01% |
12,305
+6,820
| +124% | +$158K |
|
4413
CALL
Tilly's
TLYS
$112M
| $186K | ﹤0.01% |
24,200
-600
| -2% | -$5.01K |
|
4414
PUT
US Physical Therapy
USPH
$1.22B
| $186K | ﹤0.01% |
1,900
+1,000
| +111% | +$95.4K |
|
4415
PUT
Zeta Global
ZETA
$5.54B
| $186K | ﹤0.01% |
17,200
+10,900
| +173% | +$105K |
|
4416
Amplify Alternative Harvest ETF
MJ
$96.5M
| $185K | ﹤0.01% |
4,401
+1,284
| +41% | +$63.7K |
|
4417
RCI Hospitality Holdings
RICK
$201M
| $185K | ﹤0.01% |
2,378
-10,615
| -82% | -$920K |
|
|
GOL
4418
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $185K | ﹤0.01% |
70,651
+50,089
| +244% | +$135K |
|
4419
CALL
ArcBest
ARCB
$3.1B
| $184K | ﹤0.01% |
2,000
-3,900
| -66% | -$351K |
|
4420
Teucrium Sugar Fund
CANE
$74.4M
| $184K | ﹤0.01% |
16,247
-14,986
| -48% | -$153K |
|
4421
PUT
Copa Holdings
CPA
$5.59B
| $184K | ﹤0.01% |
+2,000
| New | +$181K |
|
4422
PUT
United States Copper Index Fund
CPER
$738M
| $184K | ﹤0.01% |
7,400
-46,700
| -86% | -$1.16M |
|
4423
CALL
Hallador Energy
HNRG
$650M
| $184K | ﹤0.01% |
20,100
+18,400
| +1,082% | +$156K |
|
|
MASI
4424
PUT
DELISTED
Masimo
MASI
| $184K | ﹤0.01% |
1,000
+800
| +400% | +$135K |
|
4425
CALL
Mercury Systems
MRCY
$5.51B
| $184K | ﹤0.01% |
3,600
+3,400
| +1,700% | +$172K |
|
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.