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 | |
|---|---|---|---|---|---|---|
3226
PUT
Northern Trust
NTRS
$22.4B
| $906K | ﹤0.01% |
10,200
-50,700
| -83% | -$4.16M |
|
|
HIBB
3227
CALL
DELISTED
Hibbett, Inc. Common Stock
HIBB
| $906K | ﹤0.01% |
11,800
+8,500
| +258% | +$610K |
|
3228
CALL
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.23B
| $904K | ﹤0.01% |
23,400
-5,500
| -19% | -$155K |
|
3229
VinFast Auto
VFS
$6.9B
| $904K | ﹤0.01% |
+181,972
| New | +$1.02M |
|
3230
CALL
Virgin Galactic
SPCE
$325M
| $903K | ﹤0.01% |
30,520
-85,960
| -74% | -$3.12M |
|
|
ERF
3231
CALL
DELISTED
Enerplus Corporation
ERF
| $902K | ﹤0.01% |
45,900
+2,300
| +5% | +$37.4K |
|
3232
CALL
Globus Medical
GMED
$10.6B
| $901K | ﹤0.01% |
16,800
+10,400
| +163% | +$559K |
|
3233
Banco Bradesco
BBD
$38.5B
| $900K | ﹤0.01% |
314,950
+202,739
| +181% | +$604K |
|
3234
PUT
Owens Corning
OC
$11.6B
| $900K | ﹤0.01% |
5,400
-5,700
| -51% | -$870K |
|
3235
PUT
Expeditors International
EXPD
$22.4B
| $899K | ﹤0.01% |
7,400
+6,600
| +825% | +$816K |
|
3236
CALL
Enova International
ENVA
$6.27B
| $898K | ﹤0.01% |
14,300
+11,100
| +347% | +$650K |
|
3237
PUT
Kodak
KODK
$788M
| $895K | ﹤0.01% |
180,900
+163,400
| +934% | +$656K |
|
3238
CALL
American Coastal Insurance
ACIC
$505M
| $894K | ﹤0.01% |
83,700
+24,900
| +42% | +$282K |
|
3239
Fabrinet
FN
$16.9B
| $890K | ﹤0.01% |
4,710
+1,766
| +60% | +$354K |
|
3240
CALL
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $890K | ﹤0.01% |
18,800
-16,700
| -47% | -$608K |
|
3241
CALL
Warby Parker
WRBY
$3.05B
| $890K | ﹤0.01% |
65,400
+61,000
| +1,386% | +$810K |
|
3242
ProShares Ultra Dow30
DDM
$536M
| $889K | ﹤0.01% |
20,432
-7,266
| -26% | -$299K |
|
3243
CALL
Molson Coors Class B
TAP
$7.71B
| $887K | ﹤0.01% |
13,200
-140,900
| -91% | -$8.93M |
|
3244
PUT
Bally's
BALY
$686M
| $885K | ﹤0.01% |
63,500
+60,800
| +2,252% | +$708K |
|
3245
CALL
Assurant
AIZ
$13.7B
| $884K | ﹤0.01% |
4,700
-5,600
| -54% | -$975K |
|
3246
CALL
Core Laboratories
CLB
$518M
| $884K | ﹤0.01% |
51,800
+51,600
| +25,800% | +$812K |
|
3247
CALL
Nkarta
NKTX
$162M
| $883K | ﹤0.01% |
81,700
+63,300
| +344% | +$658K |
|
|
DVAX
3248
CALL
DELISTED
Dynavax Technologies
DVAX
| $882K | ﹤0.01% |
71,100
-34,700
| -33% | -$453K |
|
3249
CALL
Mirion Technologies
MIR
$4.12B
| $881K | ﹤0.01% |
77,500
-100,300
| -56% | -$1M |
|
3250
PUT
Rithm Capital
RITM
$5.15B
| $878K | ﹤0.01% |
78,700
-94,900
| -55% | -$1.02M |
|
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.