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 | |
|---|---|---|---|---|---|---|
2251
CALL
Performance Food Group
PFGC
$17.5B
| $2.34M | ﹤0.01% |
31,400
-7,000
| -18% | -$515K |
|
2252
PUT
Raymond James Financial
RJF
$32.5B
| $2.34M | ﹤0.01% |
18,200
+7,700
| +73% | +$897K |
|
2253
PUT
Amylyx Pharmaceuticals
AMLX
$2.05B
| $2.34M | ﹤0.01% |
822,800
+703,000
| +587% | +$9.19M |
|
2254
PUT
Gaotu Techedu
GOTU
$372M
| $2.33M | ﹤0.01% |
355,900
-15,900
| -4% | -$84.2K |
|
2255
Viatris
VTRS
$20.1B
| $2.33M | ﹤0.01% |
195,283
-11,297
| -5% | -$136K |
|
2256
CALL
Warrior Met Coal
HCC
$4.23B
| $2.32M | ﹤0.01% |
38,300
+6,800
| +22% | +$412K |
|
2257
CALL
UDR
UDR
$12.9B
| $2.32M | ﹤0.01% |
62,100
+12,900
| +26% | +$475K |
|
2258
CALL
Assured Guaranty
AGO
$3.78B
| $2.32M | ﹤0.01% |
26,600
+21,200
| +393% | +$1.79M |
|
2259
CALL
Altimmune
ALT
$539M
| $2.32M | ﹤0.01% |
227,900
-139,100
| -38% | -$1.41M |
|
2260
Annaly Capital Management
NLY
$16.9B
| $2.32M | ﹤0.01% |
117,860
-16,777
| -12% | -$324K |
|
2261
PUT
EPAM Systems
EPAM
$4.69B
| $2.32M | ﹤0.01% |
8,400
+900
| +12% | +$265K |
|
2262
CALL
Fluence Energy
FLNC
$1.78B
| $2.32M | ﹤0.01% |
133,700
+72,400
| +118% | +$1.32M |
|
|
SNV
2263
DELISTED
Synovus
SNV
| $2.31M | ﹤0.01% |
57,772
+16,012
| +38% | +$602K |
|
2264
CALL
Cincinnati Financial
CINF
$28.3B
| $2.31M | ﹤0.01% |
18,600
-10,800
| -37% | -$1.22M |
|
2265
PUT
Lamar Advertising Co
LAMR
$16.2B
| $2.3M | ﹤0.01% |
19,300
-600
| -3% | -$65.8K |
|
2266
CALL
Onto Innovation
ONTO
$13.6B
| $2.3M | ﹤0.01% |
12,700
+6,500
| +105% | +$1.1M |
|
|
RDFN
2267
PUT
DELISTED
Redfin
RDFN
| $2.3M | ﹤0.01% |
345,400
-27,200
| -7% | -$207K |
|
|
TUZ
2268
PUT
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $2.3M | ﹤0.01% |
41,000
-43,000
| -51% | -$2.41M |
|
2269
PUT
Ionis Pharmaceuticals
IONS
$9.35B
| $2.29M | ﹤0.01% |
52,900
+800
| +2% | +$38.1K |
|
2270
CALL
RB Global
RBA
$20.8B
| $2.29M | ﹤0.01% |
30,100
-1,300
| -4% | -$90.8K |
|
2271
PUT
Weyerhaeuser
WY
$17.3B
| $2.29M | ﹤0.01% |
63,800
+1,100
| +2% | +$37.2K |
|
2272
PUT
Axsome Therapeutics
AXSM
$12.4B
| $2.28M | ﹤0.01% |
28,600
+11,300
| +65% | +$948K |
|
2273
PUT
Sysco
SYY
$39.7B
| $2.28M | ﹤0.01% |
28,100
+8,500
| +43% | +$670K |
|
|
IPG
2274
PUT
DELISTED
Interpublic Group of Companies
IPG
| $2.27M | ﹤0.01% |
69,700
+58,600
| +528% | +$1.9M |
|
2275
Unity
U
$12.5B
| $2.27M | ﹤0.01% |
+85,157
| New | +$2.68M |
|
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.