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 | |
|---|---|---|---|---|---|---|
|
NOVA
4001
DELISTED
Sunnova Energy
NOVA
| $320K | ﹤0.01% |
+93,350
| New | +$467K |
|
4002
CALL
Reinsurance Group of America
RGA
$15.9B
| $320K | ﹤0.01% |
1,500
-800
| -35% | -$174K |
|
4003
CALL
Invitation Homes
INVH
$17.9B
| $319K | ﹤0.01% |
10,000
-35,000
| -78% | -$1.17M |
|
|
TUZ
4004
PUT
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $319K | ﹤0.01% |
4,900
-100
| -2% | -$6.51K |
|
4005
CALL
Capital Southwest
CSWC
$1.48B
| $318K | ﹤0.01% |
14,600
-8,800
| -38% | -$207K |
|
4006
PUT
Domo
DOMO
$170M
| $317K | ﹤0.01% |
44,900
-2,100
| -4% | -$17K |
|
4007
PUT
Prothena Corp
PRTA
$448M
| $317K | ﹤0.01% |
22,900
+11,800
| +106% | +$186K |
|
4008
CALL
Xcel Energy
XEL
$50.1B
| $317K | ﹤0.01% |
4,700
-14,000
| -75% | -$939K |
|
4009
CALL
ING
ING
$95.1B
| $316K | ﹤0.01% |
20,200
-46,200
| -70% | -$751K |
|
4010
Ambev
ABEV
$48.4B
| $315K | ﹤0.01% |
170,714
+105,200
| +161% | +$233K |
|
4011
Amcor
AMCR
$21.6B
| $315K | ﹤0.01% |
+6,714
| New | +$351K |
|
|
TPH
4012
CALL
DELISTED
Tri Pointe Homes
TPH
| $315K | ﹤0.01% |
8,700
-9,900
| -53% | -$413K |
|
4013
PUT
Twist Bioscience
TWST
$5.51B
| $315K | ﹤0.01% |
6,800
+2,900
| +74% | +$131K |
|
4014
PUT
WD-40
WDFC
$3.08B
| $315K | ﹤0.01% |
1,300
-6,600
| -84% | -$1.76M |
|
4015
CALL
CAE Inc. Common Shares
CAE
$8.48B
| $314K | ﹤0.01% |
+12,400
| New | +$262K |
|
4016
Clean Energy Fuels
CLNE
$421M
| $314K | ﹤0.01% |
125,121
-53,758
| -30% | -$153K |
|
4017
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $314K | ﹤0.01% |
3,215
-7,091
| -69% | -$718K |
|
4018
CALL
Simmons First National
SFNC
$3.39B
| $314K | ﹤0.01% |
14,200
-100
| -0.7% | -$2.34K |
|
|
CHCT
4019
CALL
Community Healthcare Trust
CHCT
$543M
| $313K | ﹤0.01% |
16,300
+16,000
| +5,333% | +$290K |
|
4020
Delek Logistics
DKL
$3.07B
| $313K | ﹤0.01% |
+7,419
| New | +$296K |
|
4021
CALL
Evolution Petroleum
EPM
$131M
| $313K | ﹤0.01% |
59,900
+59,500
| +14,875% | +$326K |
|
4022
CALL
KT
KT
$8.95B
| $313K | ﹤0.01% |
20,200
+16,900
| +512% | +$269K |
|
4023
CALL
MKS Inc
MKSI
$19.3B
| $313K | ﹤0.01% |
3,000
-1,100
| -27% | -$119K |
|
4024
PUT
Advanced Energy
AEIS
$10.9B
| $312K | ﹤0.01% |
2,700
-200
| -7% | -$22.5K |
|
4025
Old Dominion Freight Line
ODFL
$47.1B
| $312K | ﹤0.01% |
+1,770
| New | +$361K |
|
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.