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 | |
|---|---|---|---|---|---|---|
6101
PUT
Cardiff Oncology
CRDF
$66.5M
| $59K | ﹤0.01% |
+11,200
| New | +$29.8K |
|
|
CVGW
6102
DELISTED
Calavo Growers
CVGW
| $59K | ﹤0.01% |
2,126
-407
| -16% | -$11.4K |
|
6103
CEL-SCI Corp
CVM
$20.3M
| $59K | ﹤0.01% |
1,045
+95
| +10% | +$6.72K |
|
6104
PUT
Dana Inc
DAN
$2.9B
| $59K | ﹤0.01% |
4,700
-3,000
| -39% | -$38.9K |
|
6105
PUT
Deluxe
DLX
$1.18B
| $59K | ﹤0.01% |
2,900
-1,000
| -26% | -$19.9K |
|
6106
PUT
Goosehead Insurance
GSHD
$2.2B
| $59K | ﹤0.01% |
900
-1,100
| -55% | -$84.1K |
|
6107
CALL
Magnachip Semiconductor
MX
$119M
| $59K | ﹤0.01% |
10,700
+7,100
| +197% | +$45.4K |
|
6108
Newegg Commerce
NEGG
$279M
| $59K | ﹤0.01% |
3,246
+741
| +30% | +$14.2K |
|
6109
PUT
RLI Corp
RLI
$5.62B
| $59K | ﹤0.01% |
+800
| New | +$57K |
|
6110
PUT
Rogers Corp
ROG
$2.21B
| $59K | ﹤0.01% |
500
+200
| +67% | +$23.4K |
|
6111
PUT
Rush Street Interactive
RSI
$2.77B
| $59K | ﹤0.01% |
9,100
+5,200
| +133% | +$28K |
|
|
VTYX
6112
CALL
DELISTED
Ventyx Biosciences
VTYX
| $59K | ﹤0.01% |
10,900
-32,900
| -75% | -$150K |
|
|
VXRT
6113
DELISTED
Vaxart
VXRT
| $59K | ﹤0.01% |
45,918
+3,379
| +8% | +$3.54K |
|
6114
PUT
Ambev
ABEV
$48.1B
| $58K | ﹤0.01% |
23,700
-37,800
| -61% | -$98.5K |
|
6115
PUT
APi Group
APG
$17.1B
| $58K | ﹤0.01% |
2,250
+1,500
| +200% | +$34.9K |
|
|
HSAI
6116
CALL
Hesai Group
HSAI
$2.66B
| $58K | ﹤0.01% |
11,500
+11,300
| +5,650% | +$60.8K |
|
6117
CALL
Ingredion
INGR
$6.27B
| $58K | ﹤0.01% |
500
-2,500
| -83% | -$282K |
|
|
OPLN
6118
CALL
Openlane
OPLN
$4.21B
| $58K | ﹤0.01% |
3,400
+1,900
| +127% | +$28.5K |
|
6119
ManpowerGroup
MAN
$2.44B
| $58K | ﹤0.01% |
+754
| New | +$56.1K |
|
6120
PUT
Old Republic International
ORI
$10.5B
| $58K | ﹤0.01% |
1,900
-5,600
| -75% | -$163K |
|
6121
CALL
Provident Financial Services
PFS
$3.22B
| $58K | ﹤0.01% |
4,000
+3,700
| +1,233% | +$58.8K |
|
|
SFIX
6122
PUT
Stitch Fix
SFIX
$536M
| $58K | ﹤0.01% |
22,000
-56,500
| -72% | -$174K |
|
6123
CALL
TETRA Technologies
TTI
$1.14B
| $58K | ﹤0.01% |
13,200
-274,600
| -95% | -$1.14M |
|
|
PFC
6124
PUT
DELISTED
Premier Financial Corp. Common Stock
PFC
| $58K | ﹤0.01% |
2,900
+2,400
| +480% | +$50K |
|
|
AGEN
6125
PUT
Agenus
AGEN
$312M
| $57K | ﹤0.01% |
5,000
+4,950
| +9,900% | +$65.7K |
|
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.