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 | |
|---|---|---|---|---|---|---|
|
LNW
4651
DELISTED
Light & Wonder
LNW
| $238K | ﹤0.01% |
+2,341
| New | +$211K |
|
4652
QuickLogic
QUIK
$211M
| $238K | ﹤0.01% |
14,891
-981
| -6% | -$14.1K |
|
|
ATXS
4653
PUT
DELISTED
Astria Therapeutics
ATXS
| $237K | ﹤0.01% |
16,900
+16,700
| +8,350% | +$208K |
|
4654
CALL
Consolidated Water Co
CWCO
$472M
| $237K | ﹤0.01% |
8,100
+1,900
| +31% | +$58.4K |
|
4655
CGI
GIB
$15.4B
| $237K | ﹤0.01% |
2,150
+53
| +3% | +$5.93K |
|
4656
CALL
Plexus
PLXS
$6.43B
| $237K | ﹤0.01% |
2,500
-27,700
| -92% | -$2.67M |
|
4657
CALL
Essential Utilities
WTRG
$11.5B
| $237K | ﹤0.01% |
6,400
-300
| -4% | -$10.9K |
|
4658
CALL
Zurn Elkay Water Solutions
ZWS
$8.55B
| $237K | ﹤0.01% |
7,100
-1,400
| -16% | -$43.1K |
|
|
SILV
4659
PUT
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $237K | ﹤0.01% |
35,600
+3,300
| +10% | +$19.3K |
|
4660
CALL
Arqit Quantum
ARQQ
$270M
| $236K | ﹤0.01% |
+13,024
| New | +$192K |
|
4661
GeoPark
GPRK
$609M
| $236K | ﹤0.01% |
24,649
-8,045
| -25% | -$71.5K |
|
4662
VICI Properties
VICI
$29.9B
| $236K | ﹤0.01% |
+7,938
| New | +$238K |
|
4663
PUT
Kimco Realty
KIM
$17.5B
| $235K | ﹤0.01% |
12,000
-39,900
| -77% | -$794K |
|
|
SVM
4664
Silvercorp Metals
SVM
$2.02B
| $235K | ﹤0.01% |
72,105
+42,763
| +146% | +$109K |
|
4665
Vertex
VERX
$2.16B
| $235K | ﹤0.01% |
7,406
+7,056
| +2,016% | +$190K |
|
4666
PUT
Verisk Analytics
VRSK
$27.7B
| $235K | ﹤0.01% |
1,000
-2,700
| -73% | -$649K |
|
|
AZPN
4667
DELISTED
Aspen Technology Inc
AZPN
| $235K | ﹤0.01% |
1,105
-1,158
| -51% | -$228K |
|
|
MORF
4668
PUT
DELISTED
Morphic Holding, Inc. Common Stock
MORF
| $235K | ﹤0.01% |
6,700
+4,800
| +253% | +$161K |
|
4669
CALL
Black Hills Corp
BKH
$5.55B
| $234K | ﹤0.01% |
4,300
+2,900
| +207% | +$152K |
|
|
CADE
4670
PUT
DELISTED
Cadence Bank
CADE
| $234K | ﹤0.01% |
+8,100
| New | +$225K |
|
4671
PUT
Huntsman Corp
HUN
$2.1B
| $234K | ﹤0.01% |
9,000
-5,200
| -37% | -$129K |
|
|
NVMI
4672
Nova
NVMI
$11.7B
| $234K | ﹤0.01% |
1,323
-7,784
| -85% | -$1.23M |
|
4673
CALL
Radian Group
RDN
$5.28B
| $234K | ﹤0.01% |
7,000
-6,000
| -46% | -$177K |
|
4674
PUT
Allot
ALLT
$362M
| $233K | ﹤0.01% |
103,900
-42,000
| -29% | -$79.9K |
|
4675
Amylyx Pharmaceuticals
AMLX
$2.19B
| $233K | ﹤0.01% |
82,107
-47,315
| -37% | -$619K |
|
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.