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 | |
|---|---|---|---|---|---|---|
4876
PUT
Amprius Technologies
AMPX
$1.2B
| $138K | ﹤0.01% |
49,300
+42,200
| +594% | +$73.7K |
|
|
BORR
4877
PUT
Borr Drilling
BORR
$1.19B
| $138K | ﹤0.01% |
35,600
-70,500
| -66% | -$301K |
|
4878
PUT
Fortrea Holdings
FTRE
$1.93B
| $138K | ﹤0.01% |
7,400
+1,600
| +28% | +$31.2K |
|
4879
Healthcare Services Group
HCSG
$1.61B
| $138K | ﹤0.01% |
+11,910
| New | +$136K |
|
4880
Rhythm Pharmaceuticals
RYTM
$7.31B
| $138K | ﹤0.01% |
+2,475
| New | +$137K |
|
4881
PUT
Alpha and Omega Semiconductor
AOSL
$829M
| $137K | ﹤0.01% |
+3,700
| New | +$138K |
|
4882
PUT
Enpro
NPO
$6.26B
| $137K | ﹤0.01% |
+800
| New | +$135K |
|
|
STKL
4883
DELISTED
SunOpta
STKL
| $137K | ﹤0.01% |
17,856
-15,661
| -47% | -$111K |
|
|
TPH
4884
PUT
DELISTED
Tri Pointe Homes
TPH
| $137K | ﹤0.01% |
3,800
-800
| -17% | -$33.3K |
|
|
ABK
4885
PUT
DELISTED
Ambac Financial Group
ABK
| $137K | ﹤0.01% |
10,900
-153,900
| -93% | -$1.93M |
|
4886
ARK Web x.0 ETF
ARKW
$1.6B
| $136K | ﹤0.01% |
1,261
+610
| +94% | +$61.2K |
|
4887
PUT
Entergy
ETR
$50.3B
| $136K | ﹤0.01% |
1,800
-8,000
| -82% | -$578K |
|
4888
PUT
Invesco CurrencyShares Canadian Dollar Trust
FXC
$73M
| $136K | ﹤0.01% |
2,000
+1,900
| +1,900% | +$133K |
|
4889
PUT
International Seaways
INSW
$4.68B
| $136K | ﹤0.01% |
3,800
-5,700
| -60% | -$243K |
|
|
MASI
4890
DELISTED
Masimo
MASI
| $136K | ﹤0.01% |
825
-11,704
| -93% | -$1.85M |
|
4891
CALL
Envista
NVST
$4.62B
| $136K | ﹤0.01% |
7,100
+2,200
| +45% | +$43.5K |
|
4892
PUT
Sagimet Biosciences
SGMT
$435M
| $136K | ﹤0.01% |
30,300
+4,400
| +17% | +$22.3K |
|
4893
PUT
TriplePoint Venture Growth BDC
TPVG
$184M
| $136K | ﹤0.01% |
18,500
-11,300
| -38% | -$83.1K |
|
4894
ProShares UltraShort Silver
ZSL
$67M
| $136K | ﹤0.01% |
326
-829
| -72% | -$305K |
|
4895
Global X Artificial Intelligence & Technology ETF
AIQ
$8.89B
| $135K | ﹤0.01% |
+3,510
| New | +$135K |
|
4896
CALL
WisdomTree US Total Dividend Fund
DTD
$1.64B
| $135K | ﹤0.01% |
2,600
-82,600
| -97% | -$6.44M |
|
|
CALY
4897
PUT
Callaway Golf Company
CALY
$3.28B
| $135K | ﹤0.01% |
17,300
-9,700
| -36% | -$88.1K |
|
4898
CALL
OneSpan
OSPN
$584M
| $135K | ﹤0.01% |
7,300
+700
| +11% | +$11.9K |
|
4899
Paymentus
PAY
$4.62B
| $135K | ﹤0.01% |
+4,160
| New | +$124K |
|
4900
CALL
Pacer Trendpilot US Large Cap ETF
PTLC
$3.19B
| $135K | ﹤0.01% |
2,700
-100
| -4% | -$5.39K |
|
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.