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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5351
QuidelOrtho
QDEL
$1.14B
| $125K | ﹤0.01% |
+2,621
| New | +$153K |
|
5352
Qualys
QLYS
$5.1B
| $125K | ﹤0.01% |
+753
| New | +$133K |
|
|
CADE
5353
CALL
DELISTED
Cadence Bank
CADE
| $124K | ﹤0.01% |
4,300
+700
| +19% | +$19.5K |
|
5354
VanEck Digital Transformation ETF
DAPP
$234M
| $124K | ﹤0.01% |
10,720
+3,389
| +46% | +$31.9K |
|
5355
CALL
Enovis
ENOV
$1.68B
| $124K | ﹤0.01% |
2,000
-3,900
| -66% | -$233K |
|
5356
PUT
Integra LifeSciences
IART
$1.29B
| $124K | ﹤0.01% |
3,500
| – | – |
|
5357
iShares US Industrials ETF
IYJ
$1.98B
| $124K | ﹤0.01% |
+994
| New | +$117K |
|
5358
CALL
Live Oak Bancshares
LOB
$1.98B
| $124K | ﹤0.01% |
3,000
-17,300
| -85% | -$689K |
|
5359
PUT
NOV
NOV
$6.93B
| $124K | ﹤0.01% |
6,400
+2,900
| +83% | +$54K |
|
5360
CALL
Rekor Systems
REKR
$85.8M
| $124K | ﹤0.01% |
54,200
+44,500
| +459% | +$123K |
|
|
SLRN
5361
DELISTED
ACELYRIN
SLRN
| $124K | ﹤0.01% |
+18,429
| New | +$140K |
|
5362
PUT
Titan Machinery
TITN
$396M
| $124K | ﹤0.01% |
5,000
+4,500
| +900% | +$118K |
|
|
EVA
5363
CALL
DELISTED
Enviva Inc.
EVA
| $124K | ﹤0.01% |
283,500
+281,100
| +11,713% | +$147K |
|
|
ACRE
5364
Ares Commercial Real Estate
ACRE
$236M
| $123K | ﹤0.01% |
16,601
+9,072
| +120% | +$78.9K |
|
5365
PUT
Flowserve
FLS
$9.71B
| $123K | ﹤0.01% |
2,700
-4,100
| -60% | -$173K |
|
5366
PUT
Ichor Holdings
ICHR
$2.62B
| $123K | ﹤0.01% |
3,200
-700
| -18% | -$27.1K |
|
5367
Pacific Biosciences
PACB
$435M
| $123K | ﹤0.01% |
33,006
-293,785
| -90% | -$1.72M |
|
5368
Sabre
SABR
$731M
| $123K | ﹤0.01% |
+51,154
| New | +$172K |
|
|
VRNT
5369
DELISTED
Verint Systems
VRNT
| $123K | ﹤0.01% |
3,724
-5,704
| -61% | -$171K |
|
|
ACCD
5370
PUT
DELISTED
Accolade Inc
ACCD
| $123K | ﹤0.01% |
11,800
-2,000
| -14% | -$22.7K |
|
5371
CALL
EnerSys
ENS
$6.78B
| $122K | ﹤0.01% |
1,300
+200
| +18% | +$18.8K |
|
5372
PUT
iHeartMedia
IHRT
$543M
| $122K | ﹤0.01% |
58,500
-4,800
| -8% | -$11.3K |
|
|
INFA
5373
PUT
DELISTED
Informatica
INFA
| $122K | ﹤0.01% |
3,500
+3,000
| +600% | +$94.4K |
|
5374
Joby Aviation
JOBY
$7.03B
| $122K | ﹤0.01% |
22,838
-82,675
| -78% | -$469K |
|
5375
PUT
D-Wave Quantum Inc. Common Stock
QBTS
$6.7B
| $122K | ﹤0.01% |
60,000
+48,200
| +408% | +$67.7K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.