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 | |
|---|---|---|---|---|---|---|
|
RNAM
5501
CALL
DELISTED
Avidity Biosciences
RNAM
| $107K | ﹤0.01% |
4,200
-12,700
| -75% | -$199K |
|
5502
SkinHealth Systems
SKIN
$88.8M
| $107K | ﹤0.01% |
24,241
-213,868
| -90% | -$695K |
|
5503
CALL
Interface
TILE
$1.99B
| $107K | ﹤0.01% |
6,400
+6,100
| +2,033% | +$84.4K |
|
|
TSE
5504
CALL
DELISTED
Trinseo
TSE
| $107K | ﹤0.01% |
28,400
+17,800
| +168% | +$95K |
|
|
PENG
5505
PUT
Penguin Solutions Inc
PENG
$2.7B
| $107K | ﹤0.01% |
4,100
-5,100
| -55% | -$111K |
|
5506
CALL
Atmos Energy
ATO
$28.8B
| $106K | ﹤0.01% |
900
-200
| -18% | -$22.9K |
|
5507
CALL
BGC Group
BGC
$5.45B
| $106K | ﹤0.01% |
13,700
-88,900
| -87% | -$659K |
|
|
BRFS
5508
CALL
DELISTED
BRF SA
BRFS
| $106K | ﹤0.01% |
32,800
-3,500
| -10% | -$10.3K |
|
5509
PUT
Cimpress
CMPR
$2.39B
| $106K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$93.3K |
|
5510
UBS Group
UBS
$173B
| $106K | ﹤0.01% |
3,480
-73,575
| -95% | -$2.17M |
|
5511
PUT
Artisan Partners
APAM
$2.79B
| $105K | ﹤0.01% |
2,300
-36,200
| -94% | -$1.55M |
|
|
DCH
5512
PUT
Dauch Corp
DCH
$1.34B
| $105K | ﹤0.01% |
14,400
+8,000
| +125% | +$60.3K |
|
5513
Invesco DB Oil Fund
DBO
$403M
| $105K | ﹤0.01% |
6,802
+3,127
| +85% | +$45.7K |
|
|
DEA
5514
CALL
Easterly Government Properties
DEA
$1.13B
| $105K | ﹤0.01% |
3,680
+1,320
| +56% | +$40.1K |
|
|
IAS
5515
DELISTED
Integral Ad Science
IAS
| $105K | ﹤0.01% |
10,594
-476
| -4% | -$6.35K |
|
5516
PUT
NeoGenomics
NEO
$1.96B
| $105K | ﹤0.01% |
6,700
-28,000
| -81% | -$432K |
|
5517
Napco Security Technologies
NSSC
$1.32B
| $105K | ﹤0.01% |
2,620
+1,296
| +98% | +$50.9K |
|
5518
CALL
One Stop Systems
OSS
$303M
| $105K | ﹤0.01% |
32,300
+30,100
| +1,368% | +$82.2K |
|
5519
Sonos
SONO
$1.73B
| $105K | ﹤0.01% |
+5,553
| New | +$98.4K |
|
5520
CALL
Vestis
VSTS
$1.91B
| $105K | ﹤0.01% |
5,500
+4,000
| +267% | +$79.2K |
|
|
TXNM
5521
CALL
TXNM Energy Inc
TXNM
$6.41B
| $105K | ﹤0.01% |
2,800
+1,800
| +180% | +$67K |
|
|
AGS
5522
DELISTED
PlayAGS
AGS
| $104K | ﹤0.01% |
11,609
+7,565
| +187% | +$66.1K |
|
5523
CALL
InfraCap MLP ETF
AMZA
$470M
| $104K | ﹤0.01% |
2,900
-8,000
| -73% | -$303K |
|
5524
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$154B
| $104K | ﹤0.01% |
8,800
+2,100
| +31% | +$21K |
|
|
BORR
5525
CALL
Borr Drilling
BORR
$1.24B
| $104K | ﹤0.01% |
15,200
+5,900
| +63% | +$38.7K |
|
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.