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 | |
|---|---|---|---|---|---|---|
2701
PUT
Altimmune
ALT
$539M
| $1.48M | ﹤0.01% |
145,800
-29,800
| -17% | -$303K |
|
2702
Mattel
MAT
$4.17B
| $1.48M | ﹤0.01% |
74,961
+24,347
| +48% | +$461K |
|
2703
PUT
Wendy's
WEN
$1.33B
| $1.48M | ﹤0.01% |
78,800
-58,300
| -43% | -$1.1M |
|
2704
Centene
CNC
$31.3B
| $1.48M | ﹤0.01% |
+18,899
| New | +$1.46M |
|
2705
CALL
Canadian Pacific Kansas City
CP
$82B
| $1.48M | ﹤0.01% |
16,800
-4,100
| -20% | -$344K |
|
2706
PUT
CVR Energy
CVI
$3.36B
| $1.48M | ﹤0.01% |
41,500
+9,000
| +28% | +$299K |
|
2707
iShares MSCI Japan ETF
EWJ
$21.6B
| $1.48M | ﹤0.01% |
+20,736
| New | +$1.41M |
|
|
BRSL
2708
Brightstar Lottery PLC
BRSL
$1.91B
| $1.48M | ﹤0.01% |
65,500
+45,726
| +231% | +$1.15M |
|
2709
PG&E
PCG
$47.8B
| $1.48M | ﹤0.01% |
88,288
-163,285
| -65% | -$2.74M |
|
2710
CALL
Evolent Health
EVH
$475M
| $1.48M | ﹤0.01% |
45,100
+27,700
| +159% | +$884K |
|
2711
CALL
Verra Mobility
VRRM
$615M
| $1.48M | ﹤0.01% |
59,200
+10,100
| +21% | +$230K |
|
2712
PUT
Camping World
CWH
$363M
| $1.48M | ﹤0.01% |
53,000
-338,300
| -86% | -$8.73M |
|
2713
PUT
Urban Outfitters
URBN
$5.99B
| $1.48M | ﹤0.01% |
34,000
-46,600
| -58% | -$1.91M |
|
2714
CALL
CoinShares ETF Trust CoinShares Bitcoin Mining ETF
WGMI
$264M
| $1.48M | ﹤0.01% |
79,500
+54,200
| +214% | +$868K |
|
2715
ResMed
RMD
$28.3B
| $1.47M | ﹤0.01% |
+7,430
| New | +$1.36M |
|
2716
CALL
ProShares Ether Strategy ETF
EETH
$54M
| $1.47M | ﹤0.01% |
+18,200
| New | +$1.22M |
|
2717
Corteva
CTVA
$59.7B
| $1.47M | ﹤0.01% |
25,441
-24,133
| -49% | -$1.25M |
|
2718
PUT
Bank of Hawaii
BOH
$3.33B
| $1.47M | ﹤0.01% |
23,500
-47,800
| -67% | -$3.03M |
|
2719
PUT
Root
ROOT
$917M
| $1.47M | ﹤0.01% |
24,000
+6,100
| +34% | +$144K |
|
|
WRK
2720
CALL
DELISTED
WestRock Company
WRK
| $1.46M | ﹤0.01% |
29,600
-4,500
| -13% | -$197K |
|
2721
CALL
abrdn Physical Silver Shares ETF
SIVR
$4.04B
| $1.46M | ﹤0.01% |
61,400
+25,400
| +71% | +$568K |
|
2722
CALL
RBC Bearings
RBC
$18.8B
| $1.46M | ﹤0.01% |
5,400
-14,200
| -72% | -$3.83M |
|
2723
CALL
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.3M
| $1.46M | ﹤0.01% |
60,300
+11,800
| +24% | +$218K |
|
2724
CALL
Infosys
INFY
$45B
| $1.46M | ﹤0.01% |
81,300
-81,200
| -50% | -$1.58M |
|
2725
Mohawk Industries
MHK
$6.9B
| $1.46M | ﹤0.01% |
+11,125
| New | +$1.25M |
|
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.