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 | |
|---|---|---|---|---|---|---|
2951
PUT
Compass
COMP
$8.27B
| $890K | ﹤0.01% |
152,200
-23,300
| -13% | -$148K |
|
2952
MBIA
MBI
$288M
| $890K | ﹤0.01% |
137,880
+40,887
| +42% | +$211K |
|
|
JMIA
2953
CALL
Jumia Technologies
JMIA
$726M
| $889K | ﹤0.01% |
232,900
+87,500
| +60% | +$393K |
|
2954
CALL
CACI
CACI
$10.8B
| $888K | ﹤0.01% |
2,200
+1,000
| +83% | +$487K |
|
2955
Equity Residential
EQR
$25.4B
| $888K | ﹤0.01% |
+12,379
| New | +$909K |
|
2956
CALL
Eagle Materials
EXP
$6.6B
| $888K | ﹤0.01% |
3,600
-1,200
| -25% | -$346K |
|
2957
Sunoco
SUN
$14.2B
| $887K | ﹤0.01% |
17,247
-5,782
| -25% | -$306K |
|
2958
CALL
ACM Research
ACMR
$5.83B
| $886K | ﹤0.01% |
58,700
-72,300
| -55% | -$1.31M |
|
2959
CALL
KBR
KBR
$4.68B
| $886K | ﹤0.01% |
15,300
-85,500
| -85% | -$5.45M |
|
2960
CALL
Opko Health
OPK
$921M
| $885K | ﹤0.01% |
602,200
-31,300
| -5% | -$47.9K |
|
2961
Enpro
NPO
$7.05B
| $884K | ﹤0.01% |
+5,128
| New | +$867K |
|
2962
CALL
NexGen Energy
NXE
$6.05B
| $884K | ﹤0.01% |
134,000
-576,100
| -81% | -$4.34M |
|
2963
PUT
Adient
ADNT
$1.6B
| $883K | ﹤0.01% |
51,300
+45,600
| +800% | +$911K |
|
2964
CALL
Delek Logistics
DKL
$3.04B
| $883K | ﹤0.01% |
20,900
+4,300
| +26% | +$172K |
|
2965
International Flavors & Fragrances
IFF
$19.4B
| $883K | ﹤0.01% |
10,444
-31,897
| -75% | -$3M |
|
2966
Unum
UNM
$13.8B
| $883K | ﹤0.01% |
12,103
+2,962
| +32% | +$204K |
|
2967
CALL
Travere Therapeutics
TVTX
$5.33B
| $881K | ﹤0.01% |
50,600
+11,800
| +30% | +$209K |
|
2968
CALL
Corsair Gaming
CRSR
$1.05B
| $879K | ﹤0.01% |
133,000
+31,400
| +31% | +$218K |
|
2969
Crocs
CROX
$6.69B
| $878K | ﹤0.01% |
8,023
-322
| -4% | -$37.5K |
|
2970
PUT
Alphatec Holdings
ATEC
$1.27B
| $876K | ﹤0.01% |
95,500
+36,400
| +62% | +$291K |
|
2971
CALL
Ouster
OUST
$2.29B
| $876K | ﹤0.01% |
71,700
+55,400
| +340% | +$487K |
|
2972
Energy Fuels
UUUU
$2.82B
| $876K | ﹤0.01% |
170,919
+13,302
| +8% | +$82.3K |
|
2973
PUT
Petco
WOOF
$745M
| $876K | ﹤0.01% |
230,000
+3,400
| +2% | +$15.4K |
|
|
BTC
2974
PUT
Grayscale Bitcoin Mini Trust ETF
BTC
$3.4B
| $875K | ﹤0.01% |
+20,900
| New | +$769K |
|
2975
MasTec
MTZ
$26.7B
| $874K | ﹤0.01% |
6,420
-14,271
| -69% | -$1.91M |
|
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.