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 | |
|---|---|---|---|---|---|---|
|
CNH
1776
CALL
CNH Industrial
CNH
$13.8B
| $4.02M | ﹤0.01% |
310,500
+27,800
| +10% | +$336K |
|
1777
PUT
DigitalOcean
DOCN
$14.4B
| $4.01M | ﹤0.01% |
105,100
-20,700
| -16% | -$769K |
|
1778
Stanley Black & Decker
SWK
$14.2B
| $4M | ﹤0.01% |
40,892
+5,853
| +17% | +$539K |
|
1779
CALL
Valley National Bancorp
VLY
$7.93B
| $4M | ﹤0.01% |
502,600
+302,200
| +151% | +$2.69M |
|
1780
CALL
Grand Canyon Education
LOPE
$3.71B
| $3.99M | ﹤0.01% |
29,300
+25,600
| +692% | +$3.34M |
|
1781
CALL
Hartford Financial Services
HIG
$38.5B
| $3.99M | ﹤0.01% |
38,700
-12,000
| -24% | -$1.1M |
|
1782
CALL
Bloom Energy
BE
$52.6B
| $3.98M | ﹤0.01% |
354,500
+19,200
| +6% | +$211K |
|
1783
CALL
InMode
INMD
$872M
| $3.98M | ﹤0.01% |
184,400
-50,800
| -22% | -$1.14M |
|
1784
Roku
ROKU
$21.1B
| $3.98M | ﹤0.01% |
+60,995
| New | +$4.75M |
|
1785
PUT
Vanguard FTSE Europe ETF
VGK
$30B
| $3.98M | ﹤0.01% |
79,500
-71,600
| -47% | -$4.64M |
|
1786
CALL
FTI Consulting
FCN
$4.82B
| $3.97M | ﹤0.01% |
18,900
+16,800
| +800% | +$3.38M |
|
1787
Cummins
CMI
$91.7B
| $3.97M | ﹤0.01% |
+13,483
| New | +$3.47M |
|
1788
CALL
Alcon
ALC
$33.1B
| $3.96M | ﹤0.01% |
47,500
+40,400
| +569% | +$3.24M |
|
|
MRSH
1789
PUT
Marsh
MRSH
$86.3B
| $3.95M | ﹤0.01% |
19,200
-3,700
| -16% | -$737K |
|
|
HOLX
1790
PUT
DELISTED
Hologic
HOLX
| $3.92M | ﹤0.01% |
50,300
-60,800
| -55% | -$4.52M |
|
1791
CALL
HEICO Corp Class A
HEI.A
$35.4B
| $3.92M | ﹤0.01% |
20,500
+2,500
| +14% | +$370K |
|
|
MRNS
1792
PUT
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $3.91M | ﹤0.01% |
432,700
+431,600
| +39,236% | +$4.2M |
|
1793
CALL
Green Plains
GPRE
$1.19B
| $3.91M | ﹤0.01% |
169,100
-700
| -0.4% | -$15.3K |
|
1794
Apple
AAPL
$4.89T
| $3.91M | ﹤0.01% |
22,785
-30,983
| -58% | -$5.63M |
|
1795
PUT
Alaska Air
ALK
$5.15B
| $3.91M | ﹤0.01% |
90,900
-71,400
| -44% | -$2.67M |
|
1796
CALL
BellRing Brands
BRBR
$1.51B
| $3.91M | ﹤0.01% |
66,200
+57,700
| +679% | +$3.29M |
|
1797
PUT
Entegris
ENTG
$19.7B
| $3.91M | ﹤0.01% |
27,800
-29,100
| -51% | -$3.72M |
|
1798
CALL
Manulife Financial
MFC
$72.6B
| $3.9M | ﹤0.01% |
155,900
+94,600
| +154% | +$2.17M |
|
1799
PUT
LKQ Corp
LKQ
$6.58B
| $3.89M | ﹤0.01% |
72,900
+1,200
| +2% | +$59.5K |
|
1800
CALL
Group 1 Automotive
GPI
$3.94B
| $3.89M | ﹤0.01% |
13,300
+3,700
| +39% | +$1.01M |
|
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.