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 | |
|---|---|---|---|---|---|---|
1076
CALL
Sarepta Therapeutics
SRPT
$1.68B
| $9.32M | 0.01% |
76,700
-100
| -0.1% | -$12.3K |
|
1077
PUT
Novavax
NVAX
$1.29B
| $9.31M | 0.01% |
1,158,200
-417,700
| -27% | -$4.03M |
|
1078
CALL
Baker Hughes
BKR
$55.6B
| $9.29M | 0.01% |
226,400
-72,900
| -24% | -$2.94M |
|
1079
CALL
Toll Brothers
TOL
$13.7B
| $9.23M | 0.01% |
73,300
-13,000
| -15% | -$1.93M |
|
1080
PUT
New Fortress Energy
NFE
$95.7M
| $9.23M | 0.01% |
610,200
+220,200
| +56% | +$2.28M |
|
1081
CALL
Sphere Entertainment
SPHR
$4.77B
| $9.21M | 0.01% |
228,500
+120,900
| +112% | +$5.06M |
|
1082
PUT
Domino's
DPZ
$10.7B
| $9.19M | 0.01% |
21,900
-18,300
| -46% | -$8M |
|
1083
PUT
International Paper
IP
$20.1B
| $9.18M | 0.01% |
170,600
-202,700
| -54% | -$10.9M |
|
1084
CALL
Virgin Galactic
SPCE
$332M
| $9.16M | 0.01% |
1,557,500
+55,200
| +4% | +$367K |
|
1085
CALL
Ginkgo Bioworks
DNA
$518M
| $9.15M | 0.01% |
932,000
-193,600
| -17% | -$1.66M |
|
1086
CALL
Howmet Aerospace
HWM
$115B
| $9.14M | 0.01% |
83,600
-37,800
| -31% | -$4.14M |
|
1087
CALL
PACCAR
PCAR
$68.8B
| $9.13M | 0.01% |
87,800
-66,800
| -43% | -$7.31M |
|
|
FISV
1088
Fiserv Inc
FISV
$26.6B
| $9.12M | 0.01% |
44,409
+20,544
| +86% | +$4.19M |
|
1089
CALL
Sprouts Farmers Market
SFM
$6.91B
| $9.11M | 0.01% |
71,700
+30,400
| +74% | +$4.04M |
|
1090
CALL
Global E Online
GLBE
$5.79B
| $9.1M | 0.01% |
166,900
-63,800
| -28% | -$2.89M |
|
1091
CALL
Clorox
CLX
$11.3B
| $9.09M | 0.01% |
56,000
-54,400
| -49% | -$8.9M |
|
1092
CleanSpark
CLSK
$4.01B
| $9.09M | 0.01% |
987,082
+510,795
| +107% | +$6.18M |
|
1093
CALL
Deckers Outdoor
DECK
$13.4B
| $9.08M | 0.01% |
44,700
-80,100
| -64% | -$14.5M |
|
1094
Roku
ROKU
$21B
| $9.07M | 0.01% |
122,059
+72,013
| +144% | +$5.46M |
|
1095
CALL
Cummins
CMI
$91.8B
| $9.06M | 0.01% |
26,000
-30,700
| -54% | -$10.8M |
|
1096
PUT
Cenovus Energy
CVE
$55.4B
| $9.06M | 0.01% |
597,800
+275,500
| +85% | +$4.43M |
|
1097
CALL
CSX Corp
CSX
$97.8B
| $9.04M | 0.01% |
280,300
-2,400
| -0.8% | -$82.3K |
|
1098
XPeng
XPEV
$12.2B
| $9.03M | 0.01% |
763,945
+455,964
| +148% | +$5.64M |
|
1099
CALL
monday.com
MNDY
$3.03B
| $9.02M | 0.01% |
38,300
-4,800
| -11% | -$1.33M |
|
1100
CALL
Arbor Realty Trust
ABR
$966M
| $9.01M | 0.01% |
650,200
-216,600
| -25% | -$3.19M |
|
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.