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 | |
|---|---|---|---|---|---|---|
5151
CALL
Trinity Industries
TRN
$2.49B
| $150K | ﹤0.01% |
5,400
-31,700
| -85% | -$817K |
|
5152
CALL
VTEX
VTEX
$735M
| $150K | ﹤0.01% |
18,400
+18,200
| +9,100% | +$146K |
|
|
SIX
5153
PUT
DELISTED
Six Flags Entertainment Corp.
SIX
| $150K | ﹤0.01% |
5,700
-103,800
| -95% | -$2.6M |
|
5154
PUT
ALX Oncology
ALXO
$261M
| $149K | ﹤0.01% |
13,400
+8,500
| +173% | +$119K |
|
5155
PUT
Andersons Inc
ANDE
$2.41B
| $149K | ﹤0.01% |
2,600
+2,400
| +1,200% | +$129K |
|
|
KALV
5156
PUT
DELISTED
KalVista Pharmaceuticals
KALV
| $149K | ﹤0.01% |
12,600
-400,200
| -97% | -$5.34M |
|
|
MFA
5157
CALL
MFA Financial
MFA
$926M
| $149K | ﹤0.01% |
13,100
+4,100
| +46% | +$45.9K |
|
5158
PUT
Odyssey Marine Exploration
OMEX
$34.9M
| $149K | ﹤0.01% |
39,200
+20,100
| +105% | +$89.3K |
|
5159
CALL
Vivid Seats
SEAT
$84.6M
| $149K | ﹤0.01% |
1,245
-3,090
| -71% | -$362K |
|
5160
CALL
Seanergy Maritime Holdings
SHIP
$379M
| $149K | ﹤0.01% |
17,200
+15,900
| +1,223% | +$127K |
|
5161
PUT
Wabash National
WNC
$512M
| $149K | ﹤0.01% |
5,000
+3,600
| +257% | +$94.9K |
|
|
MDRX
5162
CALL
DELISTED
Veradigm Inc. Common Stock
MDRX
| $149K | ﹤0.01% |
19,400
-13,300
| -41% | -$121K |
|
5163
BioAtla
BCAB
$5.46M
| $148K | ﹤0.01% |
865
+626
| +262% | +$77.8K |
|
|
CRDL
5164
CALL
Cardiol Therapeutics
CRDL
$146M
| $148K | ﹤0.01% |
81,800
+56,800
| +227% | +$76.6K |
|
5165
PUT
Idacorp
IDA
$8.27B
| $148K | ﹤0.01% |
+1,600
| New | +$147K |
|
|
MAPS
5166
CALL
DELISTED
WM TECHNOLOGY INC A
MAPS
| $148K | ﹤0.01% |
111,600
-51,800
| -32% | -$48K |
|
|
B
5167
PUT
DELISTED
Barnes Group Inc.
B
| $148K | ﹤0.01% |
+4,000
| New | +$138K |
|
5168
CALL
ABM Industries
ABM
$2.81B
| $147K | ﹤0.01% |
3,300
-3,600
| -52% | -$151K |
|
5169
CALL
Global Net Lease
GNL
$1.84B
| $147K | ﹤0.01% |
19,000
-23,700
| -56% | -$194K |
|
5170
PUT
Rayonier Advanced Materials
RYAM
$604M
| $147K | ﹤0.01% |
30,900
-170,800
| -85% | -$727K |
|
5171
Tempest Therapeutics
TPST
$13.7M
| $147K | ﹤0.01% |
2,909
-2,278
| -44% | -$115K |
|
5172
CALL
Travere Therapeutics
TVTX
$5.2B
| $147K | ﹤0.01% |
19,100
-28,500
| -60% | -$240K |
|
5173
PUT
Vanguard Total Bond Market
BND
$157B
| $146K | ﹤0.01% |
2,000
+1,000
| +100% | +$72.6K |
|
5174
PUT
Pathward Financial
CASH
$1.86B
| $146K | ﹤0.01% |
2,900
+1,900
| +190% | +$96.5K |
|
5175
CALL
Compass Minerals
CMP
$1.23B
| $146K | ﹤0.01% |
9,300
+9,200
| +9,200% | +$193K |
|
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.