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 | |
|---|---|---|---|---|---|---|
|
AGIG
6226
PUT
Abundia Global Impact Group
AGIG
$42.5M
| $38K | ﹤0.01% |
1,500
-640
| -30% | -$21K |
|
6227
CALL
Lexicon Pharmaceuticals
LXRX
$1.03B
| $38K | ﹤0.01% |
15,800
+3,300
| +26% | +$7.56K |
|
6228
CALL
MGIC Investment
MTG
$6.16B
| $38K | ﹤0.01% |
2,900
+1,000
| +53% | +$13.5K |
|
6229
PLAYSTUDIOS Inc
MYPS
$77.9M
| $38K | ﹤0.01% |
10,446
+4,713
| +82% | +$19.1K |
|
|
OLP
6230
CALL
One Liberty Properties
OLP
$530M
| $38K | ﹤0.01% |
1,700
+900
| +113% | +$20.7K |
|
6231
CALL
Pagaya Technologies
PGY
$1.61B
| $38K | ﹤0.01% |
3,125
+2,692
| +622% | +$34.9K |
|
6232
CALL
Rigetti Computing
RGTI
$4.97B
| $38K | ﹤0.01% |
52,600
+43,800
| +498% | +$35.6K |
|
|
SHOE
6233
CALL
Shoe Station Group
SHOE
$413M
| $38K | ﹤0.01% |
1,500
-700
| -32% | -$18.3K |
|
6234
CALL
Turkcell
TKC
$4.68B
| $38K | ﹤0.01% |
8,900
-1,800
| -17% | -$8.23K |
|
6235
CALL
UFP Technologies
UFPT
$1.97B
| $38K | ﹤0.01% |
+300
| New | +$34.9K |
|
6236
PUT
Wave Life Sciences
WVE
$1.09B
| $38K | ﹤0.01% |
8,800
+4,300
| +96% | +$19.7K |
|
|
AMPS
6237
PUT
DELISTED
Altus Power
AMPS
| $38K | ﹤0.01% |
7,000
-8,600
| -55% | -$60.3K |
|
|
LL
6238
DELISTED
LL Flooring Holdings, Inc.
LL
| $38K | ﹤0.01% |
10,036
-12,613
| -56% | -$64.3K |
|
|
EVBG
6239
PUT
DELISTED
Everbridge, Inc. Common Stock
EVBG
| $38K | ﹤0.01% |
1,100
-4,100
| -79% | -$131K |
|
6240
CALL
AppFolio
APPF
$6.38B
| $37K | ﹤0.01% |
300
-3,600
| -92% | -$434K |
|
6241
PUT
Barings BDC
BBDC
$864M
| $37K | ﹤0.01% |
4,700
+4,400
| +1,467% | +$36.9K |
|
|
BRAG
6242
CALL
Bragg Gaming Group
BRAG
$50.6M
| $37K | ﹤0.01% |
10,500
-15,400
| -59% | -$60.2K |
|
6243
China Automotive Systems
CAAS
$136M
| $37K | ﹤0.01% |
7,209
-4,839
| -40% | -$33.9K |
|
6244
CALL
Cathay General Bancorp
CATY
$4.22B
| $37K | ﹤0.01% |
1,100
+100
| +10% | +$4.11K |
|
6245
CALL
Community Health Systems
CYH
$393M
| $37K | ﹤0.01% |
7,700
+1,300
| +20% | +$6.84K |
|
|
DAWN
6246
CALL
DELISTED
Day One Biopharmaceuticals
DAWN
| $37K | ﹤0.01% |
2,800
+1,500
| +115% | +$29.3K |
|
|
FINV
6247
PUT
FinVolution Group
FINV
$1.15B
| $37K | ﹤0.01% |
9,100
+4,300
| +90% | +$21.8K |
|
6248
CALL
IGC Pharma
IGC
$26M
| $37K | ﹤0.01% |
110,700
-49,600
| -31% | -$18.6K |
|
6249
CALL
iHeartMedia
IHRT
$543M
| $37K | ﹤0.01% |
9,700
+6,800
| +234% | +$43.4K |
|
6250
PUT
Immunome
IMNM
$2.58B
| $37K | ﹤0.01% |
7,600
+4,500
| +145% | +$22K |
|
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.