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 | |
|---|---|---|---|---|---|---|
6226
PUT
Willdan Group
WLDN
$1.04B
| $52K | ﹤0.01% |
+1,800
| New | +$39.2K |
|
|
JBTM
6227
CALL
JBT Marel
JBTM
$7.21B
| $52K | ﹤0.01% |
500
-16,500
| -97% | -$1.64M |
|
|
CMLS
6228
CALL
DELISTED
Cumulus Media Inc. Class A Common Stock
CMLS
| $52K | ﹤0.01% |
14,500
+3,500
| +32% | +$14.7K |
|
6229
PUT
CenterPoint Energy
CNP
$27.7B
| $51K | ﹤0.01% |
1,800
+1,300
| +260% | +$36.4K |
|
6230
Goosehead Insurance
GSHD
$2.2B
| $51K | ﹤0.01% |
773
-810
| -51% | -$61.9K |
|
6231
Direxion Daily MSCI Mexico Bull 3X ETF
MEXX
$19.7M
| $51K | ﹤0.01% |
1,478
-4,651
| -76% | -$149K |
|
6232
CALL
MillerKnoll
MLKN
$1.53B
| $51K | ﹤0.01% |
2,100
-23,200
| -92% | -$653K |
|
|
NFGC
6233
CALL
New Found Gold
NFGC
$522M
| $51K | ﹤0.01% |
14,000
+7,900
| +130% | +$26.3K |
|
|
PGRE
6234
PUT
DELISTED
Paramount Group
PGRE
| $51K | ﹤0.01% |
11,000
+10,600
| +2,650% | +$49.9K |
|
6235
PUT
Ribbon Communications
RBBN
$377M
| $51K | ﹤0.01% |
16,200
-5,000
| -24% | -$15.2K |
|
6236
PUT
Richardson Electronics
RELL
$267M
| $51K | ﹤0.01% |
5,600
-500
| -8% | -$4.82K |
|
6237
CALL
SK Telecom
SKM
$12.1B
| $51K | ﹤0.01% |
2,400
-6,800
| -74% | -$146K |
|
|
UMH
6238
UMH Properties
UMH
$1.29B
| $51K | ﹤0.01% |
3,176
-6,986
| -69% | -$107K |
|
|
GGRP
6239
CALL
Glimpse Group
GGRP
$18.8M
| $51K | ﹤0.01% |
46,100
+33,100
| +255% | +$43.4K |
|
|
WCN
6240
PUT
Waste Connections
WCN
$42.2B
| $51K | ﹤0.01% |
300
-600
| -67% | -$96.4K |
|
|
FBMS
6241
CALL
DELISTED
The First Bancshares, Inc.
FBMS
| $51K | ﹤0.01% |
+2,000
| New | +$51.4K |
|
|
MODN
6242
DELISTED
MODEL N, INC.
MODN
| $51K | ﹤0.01% |
1,795
+34
| +2% | +$897 |
|
6243
CALL
Amcor
AMCR
$20.8B
| $50K | ﹤0.01% |
1,060
-1,620
| -60% | -$75.8K |
|
|
LONA
6244
LeonaBio Inc
LONA
$66.3M
| $50K | ﹤0.01% |
+1,833
| New | +$58.1K |
|
6245
CALL
AMES National
ATLO
$271M
| $50K | ﹤0.01% |
2,500
+1,500
| +150% | +$29.4K |
|
6246
CALL
Brookfield Infrastructure
BIPC
$5.2B
| $50K | ﹤0.01% |
1,400
-9,300
| -87% | -$325K |
|
6247
CALL
CrossAmerica Partners
CAPL
$847M
| $50K | ﹤0.01% |
2,200
+1,700
| +340% | +$38.4K |
|
6248
CALL
Viant Technology
DSP
$236M
| $50K | ﹤0.01% |
4,700
-9,700
| -67% | -$84.4K |
|
6249
PUT
Gran Tierra Energy
GTE
$265M
| $50K | ﹤0.01% |
7,100
-500
| -7% | -$2.78K |
|
6250
CALL
Haleon
HLN
$43.5B
| $50K | ﹤0.01% |
6,000
-4,100
| -41% | -$34.3K |
|
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.