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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3051
CALL
Emergent Biosolutions
EBS
$375M
| $809K | ﹤0.01% |
84,700
-81,600
| -49% | -$749K |
|
3052
CALL
Harmony Gold Mining
HMY
$9.92B
| $807K | ﹤0.01% |
98,400
+25,700
| +35% | +$250K |
|
3053
Thermo Fisher Scientific
TMO
$211B
| $807K | ﹤0.01% |
+1,553
| New | +$854K |
|
3054
Owens Corning
OC
$11.5B
| $806K | ﹤0.01% |
4,733
+1,692
| +56% | +$316K |
|
3055
CALL
Acadia Pharmaceuticals
ACAD
$4.25B
| $805K | ﹤0.01% |
43,900
-27,800
| -39% | -$449K |
|
3056
PUT
Ezcorp Inc
EZPW
$1.82B
| $805K | ﹤0.01% |
65,900
+28,600
| +77% | +$339K |
|
|
WCC
3057
WESCO International
WCC
$16.2B
| $804K | ﹤0.01% |
+4,443
| New | +$840K |
|
3058
CALL
Atmus Filtration Technologies
ATMU
$4.37B
| $803K | ﹤0.01% |
20,500
-89,500
| -81% | -$3.63M |
|
|
STR
3059
CALL
DELISTED
Sitio Royalties
STR
| $803K | ﹤0.01% |
41,900
-17,100
| -29% | -$382K |
|
3060
UGI
UGI
$8B
| $803K | ﹤0.01% |
28,479
-3,076
| -10% | -$79.8K |
|
3061
CALL
Qfin Holdings
QFIN
$1.61B
| $802K | ﹤0.01% |
20,900
+12,100
| +138% | +$419K |
|
3062
CALL
Sprinklr
CXM
$1.33B
| $801K | ﹤0.01% |
94,800
+30,600
| +48% | +$245K |
|
3063
Ventas
VTR
$48.9B
| $800K | ﹤0.01% |
13,601
-28,194
| -67% | -$1.77M |
|
3064
PUT
Silicon Motion
SIMO
$9.19B
| $799K | ﹤0.01% |
14,800
+2,600
| +21% | +$146K |
|
3065
CALL
abrdn Physical Silver Shares ETF
SIVR
$4.04B
| $799K | ﹤0.01% |
29,000
+17,300
| +148% | +$518K |
|
3066
Invesco S&P 500 Low Volatility ETF
SPLV
$7.2B
| $799K | ﹤0.01% |
+11,426
| New | +$824K |
|
3067
PUT
Aramark
ARMK
$15B
| $798K | ﹤0.01% |
21,400
-42,400
| -66% | -$1.65M |
|
3068
CALL
Burford Capital
BUR
$907M
| $798K | ﹤0.01% |
62,600
+15,600
| +33% | +$209K |
|
3069
PUT
Cipher Digital
CIFR
$9.47B
| $798K | ﹤0.01% |
172,000
-344,200
| -67% | -$1.95M |
|
3070
Ocular Therapeutix
OCUL
$1.86B
| $798K | ﹤0.01% |
93,473
+84,431
| +934% | +$824K |
|
3071
PUT
Anavex Life Sciences
AVXL
$222M
| $797K | ﹤0.01% |
74,300
+35,300
| +91% | +$272K |
|
3072
Douglas Emmett
DEI
$2.06B
| $796K | ﹤0.01% |
42,925
+8,529
| +25% | +$159K |
|
3073
PUT
Ecopetrol
EC
$32.9B
| $796K | ﹤0.01% |
100,600
+73,000
| +264% | +$588K |
|
3074
CALL
Mine Safety
MSA
$6.74B
| $795K | ﹤0.01% |
4,800
-32,500
| -87% | -$5.57M |
|
3075
Archer Aviation
ACHR
$3.64B
| $794K | ﹤0.01% |
+81,508
| New | +$453K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.