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 | |
|---|---|---|---|---|---|---|
6051
PUT
UroGen Pharma
URGN
$1.86B
| $63K | ﹤0.01% |
4,200
-1,300
| -24% | -$21.2K |
|
|
JOAN
6052
PUT
DELISTED
JOANN, Inc. Common Stock
JOAN
| $63K | ﹤0.01% |
13,700
-1,600
| -10% | -$644 |
|
6053
PUT
Adient
ADNT
$1.65B
| $62K | ﹤0.01% |
1,900
-500
| -21% | -$17K |
|
6054
American Outdoor Brands
AOUT
$155M
| $62K | ﹤0.01% |
7,064
-7,187
| -50% | -$62K |
|
|
DSL
6055
CALL
DoubleLine Income Solutions Fund
DSL
$1.22B
| $62K | ﹤0.01% |
4,900
-6,800
| -58% | -$85.4K |
|
|
HPP
6056
CALL
Hudson Pacific Properties
HPP
$747M
| $62K | ﹤0.01% |
1,386
-12,200
| -90% | -$643K |
|
6057
CALL
Imperial Oil
IMO
$62.7B
| $62K | ﹤0.01% |
900
-4,900
| -84% | -$299K |
|
|
NXDR
6058
CALL
Nextdoor Holdings
NXDR
$847M
| $62K | ﹤0.01% |
27,900
-189,600
| -87% | -$354K |
|
6059
PUT
Life Time Group Holdings
LTH
$10.1B
| $62K | ﹤0.01% |
4,000
+2,500
| +167% | +$34.7K |
|
6060
La-Z-Boy
LZB
$1.58B
| $62K | ﹤0.01% |
1,659
-4,095
| -71% | -$150K |
|
6061
CALL
News Corp Class B
NWS
$16.9B
| $62K | ﹤0.01% |
2,400
-7,300
| -75% | -$193K |
|
6062
PUT
Surgery Partners
SGRY
$2.01B
| $62K | ﹤0.01% |
2,100
-1,800
| -46% | -$56.3K |
|
6063
PUT
SkinHealth Systems
SKIN
$88.8M
| $62K | ﹤0.01% |
14,100
-3,100
| -18% | -$10.1K |
|
|
SOL
6064
DELISTED
Emeren Group
SOL
| $62K | ﹤0.01% |
32,365
-24,093
| -43% | -$49.1K |
|
6065
State Street SPDR Portfolio Long Term Treasury ETF
SPTL
$10.4B
| $62K | ﹤0.01% |
2,232
-17,550
| -89% | -$490K |
|
6066
CALL
Thomson Reuters
TRI
$42.8B
| $62K | ﹤0.01% |
394
-591
| -60% | -$92K |
|
6067
Vanguard Industrials ETF
VIS
$8.1B
| $62K | ﹤0.01% |
255
+50
| +24% | +$11.4K |
|
|
KLRS
6068
CALL
Kalaris Therapeutics
KLRS
$83.5M
| $62K | ﹤0.01% |
3,604
+247
| +7% | +$4.03K |
|
|
AXNX
6069
PUT
DELISTED
Axonics, Inc. Common Stock
AXNX
| $62K | ﹤0.01% |
900
-4,900
| -84% | -$331K |
|
|
INST
6070
CALL
DELISTED
Instructure Holdings, Inc.
INST
| $62K | ﹤0.01% |
2,900
-4,700
| -62% | -$111K |
|
6071
CALL
Aaon
AAON
$7.3B
| $61K | ﹤0.01% |
700
-500
| -42% | -$39.2K |
|
6072
Beam Global
BEEM
$23.3M
| $61K | ﹤0.01% |
8,994
-30,406
| -77% | -$207K |
|
6073
DMC Global
BOOM
$138M
| $61K | ﹤0.01% |
3,164
+1,371
| +76% | +$24K |
|
6074
CALL
DLH Holdings
DLHC
$70.7M
| $61K | ﹤0.01% |
4,600
-1,300
| -22% | -$20.1K |
|
6075
CALL
Federated Hermes
FHI
$4.55B
| $61K | ﹤0.01% |
1,700
+1,200
| +240% | +$42.2K |
|
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.