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 | |
|---|---|---|---|---|---|---|
3626
HighPeak Energy
HPK
$811M
| $617K | ﹤0.01% |
39,151
+12,259
| +46% | +$182K |
|
3627
CALL
FT Vest Gold Strategy Target Income ETF
IGLD
$505M
| $617K | ﹤0.01% |
13,600
-14,600
| -52% | -$277K |
|
|
SF
3628
CALL
Stifel
SF
$12.8B
| $617K | ﹤0.01% |
11,850
-18,150
| -61% | -$894K |
|
|
TPIC
3629
PUT
DELISTED
TPI Composites
TPIC
| $617K | ﹤0.01% |
212,300
+188,600
| +796% | +$556K |
|
3630
PUT
Pacific Biosciences
PACB
$432M
| $616K | ﹤0.01% |
164,500
-181,600
| -52% | -$1.06M |
|
3631
WD-40
WDFC
$3.08B
| $616K | ﹤0.01% |
2,434
+790
| +48% | +$204K |
|
|
ALTM
3632
PUT
DELISTED
Arcadium Lithium plc
ALTM
| $615K | ﹤0.01% |
+142,700
| New | +$716K |
|
3633
PUT
Honda
HMC
$39.3B
| $614K | ﹤0.01% |
16,500
+3,400
| +26% | +$117K |
|
3634
CALL
Meritage Homes
MTH
$4.89B
| $614K | ﹤0.01% |
7,000
-3,600
| -34% | -$291K |
|
3635
PUT
Tarsus Pharmaceuticals
TARS
$2.57B
| $614K | ﹤0.01% |
16,900
+16,500
| +4,125% | +$485K |
|
3636
CALL
Lincoln Electric
LECO
$14.6B
| $613K | ﹤0.01% |
2,400
+2,200
| +1,100% | +$520K |
|
|
3637
Honda
HMC
$39.3B
| $612K | ﹤0.01% |
+16,444
| New | +$565K |
|
|
NNDM
3638
Nano Dimension
NNDM
$314M
| $612K | ﹤0.01% |
220,095
+197,251
| +863% | +$508K |
|
3639
Amplify Junior Silver Miners ETF
SILJ
$3.19B
| $612K | ﹤0.01% |
61,706
-64,180
| -51% | -$573K |
|
3640
PUT
Eastman Chemical
EMN
$7.79B
| $611K | ﹤0.01% |
6,100
-2,400
| -28% | -$211K |
|
3641
EPR Properties
EPR
$4.92B
| $611K | ﹤0.01% |
14,395
+12,429
| +632% | +$542K |
|
|
MAG
3642
CALL
DELISTED
MAG Silver
MAG
| $611K | ﹤0.01% |
57,800
+4,600
| +9% | +$42.2K |
|
|
SAND
3643
DELISTED
Sandstorm Gold
SAND
| $610K | ﹤0.01% |
116,313
+84,489
| +265% | +$391K |
|
3644
CALL
Teucrium Agricultural Fund
TAGS
$19.3M
| $610K | ﹤0.01% |
48,700
+3,800
| +8% | +$108K |
|
|
AMWD
3645
CALL
DELISTED
American Woodmark
AMWD
| $609K | ﹤0.01% |
6,000
-3,700
| -38% | -$349K |
|
3646
CALL
Coursera
COUR
$1.68B
| $609K | ﹤0.01% |
43,500
-14,500
| -25% | -$246K |
|
3647
PUT
Ginkgo Bioworks
DNA
$503M
| $608K | ﹤0.01% |
13,120
-1,848
| -12% | -$95.7K |
|
3648
PUT
Knife River
KNF
$4.48B
| $608K | ﹤0.01% |
7,500
+7,200
| +2,400% | +$505K |
|
3649
CALL
Primoris Services
PRIM
$4.28B
| $608K | ﹤0.01% |
14,300
+13,300
| +1,330% | +$491K |
|
3650
PUT
LPL Financial
LPLA
$27.4B
| $607K | ﹤0.01% |
2,300
-11,100
| -83% | -$2.8M |
|
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.