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 | |
|---|---|---|---|---|---|---|
6851
JPMorgan Ultra-Short Income ETF
JPST
$40.1B
| $16K | ﹤0.01% |
+329
| New | +$16.6K |
|
6852
PUT
Standard BioTools
LAB
$342M
| $16K | ﹤0.01% |
9,200
-3,900
| -30% | -$7.26K |
|
6853
PUT
Grand Canyon Education
LOPE
$4.22B
| $16K | ﹤0.01% |
100
-400
| -80% | -$61.3K |
|
6854
PUT
Neonode
NEON
$12.6M
| $16K | ﹤0.01% |
2,000
-13,400
| -87% | -$103K |
|
|
NEWP
6855
CALL
New Pacific Metals
NEWP
$809M
| $16K | ﹤0.01% |
14,400
+9,000
| +167% | +$14K |
|
6856
CALL
OFG Bancorp
OFG
$2.21B
| $16K | ﹤0.01% |
+400
| New | +$17.2K |
|
6857
CALL
OptimizeRx
OPRX
$120M
| $16K | ﹤0.01% |
+3,300
| New | +$18.4K |
|
6858
PUT
Pinnacle West Capital
PNW
$12.4B
| $16K | ﹤0.01% |
200
-3,800
| -95% | -$337K |
|
|
RGLS
6859
CALL
DELISTED
Regulus Therapeutics
RGLS
| $16K | ﹤0.01% |
10,300
+1,400
| +16% | +$2.15K |
|
6860
RLI Corp
RLI
$6.02B
| $16K | ﹤0.01% |
+204
| New | +$16.9K |
|
6861
PUT
Red Robin
RRGB
$139M
| $16K | ﹤0.01% |
3,000
-2,300
| -43% | -$12.5K |
|
6862
CALL
Rayonier Advanced Materials
RYAM
$562M
| $16K | ﹤0.01% |
2,000
-200
| -9% | -$1.68K |
|
6863
CALL
Safety Insurance
SAFT
$1.51B
| $16K | ﹤0.01% |
+200
| New | +$16.6K |
|
|
SOND
6864
PUT
DELISTED
Sonder
SOND
| $16K | ﹤0.01% |
5,100
-11,400
| -69% | -$40.4K |
|
6865
STAAR Surgical
STAA
$1.19B
| $16K | ﹤0.01% |
690
-32,254
| -98% | -$921K |
|
6866
CALL
STAG Industrial
STAG
$7.5B
| $16K | ﹤0.01% |
500
-2,900
| -85% | -$106K |
|
6867
Stoke Therapeutics
STOK
$1.84B
| $16K | ﹤0.01% |
1,481
-1,157
| -44% | -$14.2K |
|
6868
PUT
Tarsus Pharmaceuticals
TARS
$2.55B
| $16K | ﹤0.01% |
+300
| New | +$13.6K |
|
6869
TPG
TPG
$6.76B
| $16K | ﹤0.01% |
+263
| New | +$17.3K |
|
6870
CALL
Veru
VERU
$35.5M
| $16K | ﹤0.01% |
2,480
-4,660
| -65% | -$34.6K |
|
6871
Wave Life Sciences
WVE
$1.12B
| $16K | ﹤0.01% |
1,329
-19,316
| -94% | -$258K |
|
6872
PUT
Woodward
WWD
$23B
| $16K | ﹤0.01% |
100
-2,900
| -97% | -$495K |
|
6873
CALL
Xencor
XNCR
$1.45B
| $16K | ﹤0.01% |
700
| – | – |
|
|
AMBR
6874
Amber International Holding Ltd
AMBR
$132M
| $16K | ﹤0.01% |
+1,789
| New | +$8.83K |
|
|
QTOP
6875
iShares Nasdaq Top 30 Stocks ETF
QTOP
$268M
| $16K | ﹤0.01% |
+617
| New | +$16K |
|
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.