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 | |
|---|---|---|---|---|---|---|
6001
PUT
Neogen
NEOG
$2.63B
| $44K | ﹤0.01% |
3,700
+3,600
| +3,600% | +$50.4K |
|
|
ACH
6002
CALL
Accendra Health
ACH
$237M
| $44K | ﹤0.01% |
3,400
-6,200
| -65% | -$82.6K |
|
|
BCIC
6003
CALL
BCP Investment Corp
BCIC
$89.1M
| $44K | ﹤0.01% |
2,700
+1,900
| +238% | +$33.4K |
|
6004
Radware
RDWR
$1.1B
| $44K | ﹤0.01% |
1,958
-8,332
| -81% | -$191K |
|
6005
CALL
Dr. Reddy's Laboratories
RDY
$9.87B
| $44K | ﹤0.01% |
+2,800
| New | +$42.1K |
|
6006
CALL
Sonic Automotive
SAH
$2.9B
| $44K | ﹤0.01% |
+700
| New | +$43.4K |
|
6007
PUT
SGHC Ltd
SGHC
$7.11B
| $44K | ﹤0.01% |
7,200
-5,000
| -41% | -$26.7K |
|
6008
CALL
Televisa
TV
$1.48B
| $44K | ﹤0.01% |
26,500
-70,000
| -73% | -$152K |
|
6009
Invesco S&P 500 Top 50 ETF
XLG
$10.6B
| $44K | ﹤0.01% |
891
-10,902
| -92% | -$537K |
|
|
SOBO
6010
South Bow Corp
SOBO
$7.74B
| $44K | ﹤0.01% |
+1,908
| New | +$46.7K |
|
|
AEVA
6011
PUT
Aeva Technologies
AEVA
$1.2B
| $43K | ﹤0.01% |
9,100
+4,200
| +86% | +$17K |
|
6012
Alarm.com
ALRM
$2.71B
| $43K | ﹤0.01% |
+716
| New | +$42.7K |
|
6013
Aspen Aerogels
ASPN
$384M
| $43K | ﹤0.01% |
3,666
-22,815
| -86% | -$389K |
|
|
AUTL
6014
CALL
Autolus Therapeutics
AUTL
$397M
| $43K | ﹤0.01% |
18,500
+16,600
| +874% | +$56.1K |
|
6015
PUT
AvalonBay Communities
AVB
$26.5B
| $43K | ﹤0.01% |
200
-19,700
| -99% | -$4.45M |
|
6016
Vanguard Total International Bond ETF
BNDX
$81.9B
| $43K | ﹤0.01% |
+888
| New | +$44.4K |
|
6017
China Yuchai International
CYD
$1.77B
| $43K | ﹤0.01% |
+4,584
| New | +$48.1K |
|
6018
Eledon Pharmaceuticals
ELDN
$261M
| $43K | ﹤0.01% |
+10,437
| New | +$41.1K |
|
6019
PUT
1-800-Flowers.com
FLWS
$250M
| $43K | ﹤0.01% |
5,300
-700
| -12% | -$5.61K |
|
6020
PUT
iShares S&P GSCI Commodity-Indexed Trust
GSG
$998M
| $43K | ﹤0.01% |
2,000
-1,500
| -43% | -$32K |
|
6021
Idacorp
IDA
$8.27B
| $43K | ﹤0.01% |
+395
| New | +$43.4K |
|
|
LNW
6022
PUT
DELISTED
Light & Wonder
LNW
| $43K | ﹤0.01% |
500
-1,200
| -71% | -$112K |
|
6023
Live Oak Bancshares
LOB
$1.98B
| $43K | ﹤0.01% |
+1,097
| New | +$49.4K |
|
6024
OneSpan
OSPN
$574M
| $43K | ﹤0.01% |
2,373
-144,714
| -98% | -$2.46M |
|
6025
PUT
OneSpaWorld
OSW
$2.61B
| $43K | ﹤0.01% |
+2,200
| New | +$40.8K |
|
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.