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 | |
|---|---|---|---|---|---|---|
3076
Sherwin-Williams
SHW
$80.7B
| $1.04M | ﹤0.01% |
2,995
-6,992
| -70% | -$2.23M |
|
3077
United Parks & Resorts
PRKS
$2.12B
| $1.04M | ﹤0.01% |
+18,517
| New | +$940K |
|
3078
CALL
M/I Homes
MHO
$3.81B
| $1.03M | ﹤0.01% |
7,600
-8,900
| -54% | -$1.13M |
|
3079
CALL
PROG Holdings
PRG
$1.73B
| $1.03M | ﹤0.01% |
30,000
+28,000
| +1,400% | +$881K |
|
3080
CALL
Sturm, Ruger & Co
RGR
$620M
| $1.03M | ﹤0.01% |
22,400
-11,200
| -33% | -$495K |
|
|
WW
3081
PUT
DELISTED
WW International
WW
| $1.03M | ﹤0.01% |
558,800
+197,600
| +55% | +$786K |
|
3082
Brookfield Renewable
BEPC
$5.95B
| $1.03M | ﹤0.01% |
41,934
+40,318
| +2,495% | +$1.06M |
|
3083
CALL
Terex
TEX
$7.89B
| $1.03M | ﹤0.01% |
16,000
+2,300
| +17% | +$135K |
|
3084
CALL
Shoals Technologies Group
SHLS
$1.57B
| $1.03M | ﹤0.01% |
92,100
+10,000
| +12% | +$138K |
|
3085
CALL
ASE Group
ASX
$80.2B
| $1.03M | ﹤0.01% |
93,500
+68,100
| +268% | +$668K |
|
3086
CALL
Boise Cascade
BCC
$2.75B
| $1.03M | ﹤0.01% |
6,700
-29,000
| -81% | -$3.92M |
|
|
MAXN
3087
PUT
DELISTED
Maxeon Solar Technologies
MAXN
| $1.03M | ﹤0.01% |
3,087
+497
| +19% | +$223K |
|
3088
CALL
Bio-Techne
TECH
$11.2B
| $1.03M | ﹤0.01% |
14,600
-5,800
| -28% | -$415K |
|
3089
CALL
Mid-America Apartment Communities
MAA
$15.5B
| $1.03M | ﹤0.01% |
7,800
+900
| +13% | +$117K |
|
3090
CALL
Donnelley Financial Solutions
DFIN
$1.26B
| $1.02M | ﹤0.01% |
+16,500
| New | +$1.03M |
|
3091
CALL
Zeta Global
ZETA
$5.17B
| $1.02M | ﹤0.01% |
93,600
+33,200
| +55% | +$331K |
|
3092
CALL
Allegiant Air
ALGT
$2.66B
| $1.02M | ﹤0.01% |
13,600
+6,300
| +86% | +$478K |
|
3093
PUT
Procept Biorobotics
PRCT
$1.01B
| $1.02M | ﹤0.01% |
20,700
-19,200
| -48% | -$914K |
|
3094
PUT
Acuity Brands
AYI
$10.1B
| $1.02M | ﹤0.01% |
3,800
+1,200
| +46% | +$291K |
|
3095
Freshpet
FRPT
$2.92B
| $1.02M | ﹤0.01% |
8,813
-20,833
| -70% | -$2.01M |
|
3096
PUT
The Greenbrier Companies
GBX
$1.56B
| $1.02M | ﹤0.01% |
19,600
-1,900
| -9% | -$91.4K |
|
3097
PUT
Universal Health Services
UHS
$9.64B
| $1.02M | ﹤0.01% |
5,600
-8,900
| -61% | -$1.47M |
|
3098
CALL
Immunocore
IMCR
$1.72B
| $1.02M | ﹤0.01% |
15,700
-15,000
| -49% | -$1.03M |
|
3099
PVH
PVH
$3.87B
| $1.02M | ﹤0.01% |
7,244
-16,896
| -70% | -$2.16M |
|
3100
CALL
Syndax Pharmaceuticals
SNDX
$1.82B
| $1.02M | ﹤0.01% |
42,800
-101,100
| -70% | -$2.25M |
|
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.