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 | |
|---|---|---|---|---|---|---|
2626
CALL
Hawaiian Electric Industries
HE
$2.33B
| $1.6M | ﹤0.01% |
142,500
-90,500
| -39% | -$1.15M |
|
2627
PUT
Westlake Corp
WLK
$9.46B
| $1.6M | ﹤0.01% |
10,500
+5,600
| +114% | +$788K |
|
2628
CALL
Mativ Holdings
MATV
$448M
| $1.6M | ﹤0.01% |
85,500
-229,600
| -73% | -$3.43M |
|
2629
CALL
Brookdale Senior Living
BKD
$3.62B
| $1.6M | ﹤0.01% |
242,400
+9,500
| +4% | +$55.4K |
|
2630
PUT
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.6M | ﹤0.01% |
32,600
+17,400
| +114% | +$817K |
|
2631
PUT
Children's Place
PLCE
$53.6M
| $1.59M | ﹤0.01% |
138,300
+55,100
| +66% | +$1.04M |
|
2632
PUT
Brunswick
BC
$5.19B
| $1.59M | ﹤0.01% |
16,500
-10,800
| -40% | -$948K |
|
2633
CALL
Cirrus Logic
CRUS
$6.74B
| $1.59M | ﹤0.01% |
17,200
+10,300
| +149% | +$890K |
|
2634
CALL
Bread Financial
BFH
$4.21B
| $1.59M | ﹤0.01% |
42,700
+7,700
| +22% | +$273K |
|
2635
PUT
Varonis Systems
VRNS
$5.25B
| $1.59M | ﹤0.01% |
33,700
+29,300
| +666% | +$1.4M |
|
2636
CALL
Bloomin' Brands
BLMN
$680M
| $1.59M | ﹤0.01% |
55,300
-27,600
| -33% | -$751K |
|
2637
PUT
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.3M
| $1.59M | ﹤0.01% |
53,900
-38,700
| -42% | -$715K |
|
2638
CALL
PAR Technology
PAR
$637M
| $1.58M | ﹤0.01% |
34,900
+16,500
| +90% | +$729K |
|
2639
PUT
Annovis Bio
ANVS
$70.6M
| $1.58M | ﹤0.01% |
132,500
+132,300
| +66,150% | +$1.44M |
|
|
GRFS
2640
Grifois
GRFS
$5.16B
| $1.58M | ﹤0.01% |
235,955
+234,108
| +12,675% | +$1.83M |
|
|
ARCH
2641
PUT
DELISTED
Arch Resources, Inc.
ARCH
| $1.57M | ﹤0.01% |
9,800
-11,800
| -55% | -$2.02M |
|
2642
PUT
RUM Group Inc
RUM
$1.57B
| $1.57M | ﹤0.01% |
194,900
+105,000
| +117% | +$678K |
|
2643
PUT
Liquidia Corp
LQDA
$7.67B
| $1.57M | ﹤0.01% |
106,700
-189,700
| -64% | -$2.64M |
|
2644
PUT
Plains GP Holdings
PAGP
$5.23B
| $1.57M | ﹤0.01% |
86,200
+75,900
| +737% | +$1.28M |
|
2645
CALL
STAAR Surgical
STAA
$1.16B
| $1.57M | ﹤0.01% |
41,100
+26,400
| +180% | +$858K |
|
2646
CALL
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $1.57M | ﹤0.01% |
29,000
-70,600
| -71% | -$3.28M |
|
2647
PUT
Bio-Techne
TECH
$11.2B
| $1.57M | ﹤0.01% |
22,300
-5,000
| -18% | -$358K |
|
2648
CALL
Spectrum Brands
SPB
$2.04B
| $1.57M | ﹤0.01% |
17,600
+8,100
| +85% | +$661K |
|
2649
CALL
Global Ship Lease
GSL
$1.57B
| $1.56M | ﹤0.01% |
77,100
+44,100
| +134% | +$898K |
|
2650
CALL
NeoGenomics
NEO
$1.81B
| $1.56M | ﹤0.01% |
99,600
+73,300
| +279% | +$1.13M |
|
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.