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 | |
|---|---|---|---|---|---|---|
1651
PG&E
PCG
$47.8B
| $3.94M | ﹤0.01% |
195,320
+191,282
| +4,737% | +$3.89M |
|
1652
ArcBest
ARCB
$3.44B
| $3.94M | ﹤0.01% |
42,226
+20,001
| +90% | +$2.11M |
|
1653
CALL
Recursion Pharmaceuticals
RXRX
$1.57B
| $3.92M | ﹤0.01% |
579,700
+409,800
| +241% | +$2.76M |
|
1654
CALL
Lincoln National
LNC
$7.91B
| $3.91M | ﹤0.01% |
123,400
-98,800
| -44% | -$3.29M |
|
1655
PUT
Ovintiv
OVV
$17.5B
| $3.91M | ﹤0.01% |
96,600
-19,500
| -17% | -$812K |
|
1656
CALL
Summit Therapeutics
SMMT
$10.9B
| $3.9M | ﹤0.01% |
218,800
+84,600
| +63% | +$1.64M |
|
1657
PUT
Transmedics
TMDX
$2.5B
| $3.9M | ﹤0.01% |
62,600
+51,100
| +444% | +$4.76M |
|
1658
PUT
Huntington Bancshares
HBAN
$35.1B
| $3.9M | ﹤0.01% |
239,500
-64,700
| -21% | -$1.06M |
|
1659
Box
BOX
$4.02B
| $3.89M | ﹤0.01% |
123,137
+44,676
| +57% | +$1.47M |
|
1660
PUT
Canadian Solar
CSIQ
$906M
| $3.88M | ﹤0.01% |
348,600
-221,000
| -39% | -$2.85M |
|
1661
PUT
CSX Corp
CSX
$98.6B
| $3.88M | ﹤0.01% |
120,100
-315,900
| -72% | -$10.8M |
|
1662
CALL
GXO Logistics
GXO
$6.06B
| $3.87M | ﹤0.01% |
88,900
+53,800
| +153% | +$2.96M |
|
1663
PUT
Enterprise Products Partners
EPD
$83.8B
| $3.86M | ﹤0.01% |
123,200
-97,700
| -44% | -$3M |
|
1664
Novartis
NVS
$295B
| $3.86M | ﹤0.01% |
39,701
+38,588
| +3,467% | +$4.11M |
|
1665
CALL
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $3.86M | ﹤0.01% |
68,500
-15,400
| -18% | -$727K |
|
1666
State Street Communication Services Select Sector SPDR ETF
XLC
$21.9B
| $3.86M | ﹤0.01% |
39,855
+16,462
| +70% | +$1.57M |
|
1667
CALL
M&T Bank
MTB
$36.2B
| $3.85M | ﹤0.01% |
20,500
-8,000
| -28% | -$1.59M |
|
1668
CALL
DaVita
DVA
$15.1B
| $3.84M | ﹤0.01% |
25,700
-20,600
| -44% | -$3.23M |
|
1669
PUT
Repligen
RGEN
$7.44B
| $3.84M | ﹤0.01% |
26,700
+16,800
| +170% | +$2.41M |
|
|
SHNY
1670
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $3.84M | ﹤0.01% |
531,200
-23,800
| -4% | -$172K |
|
1671
PUT
First Horizon
FHN
$12.1B
| $3.83M | ﹤0.01% |
190,300
+47,100
| +33% | +$886K |
|
1672
Targa Resources
TRGP
$60.4B
| $3.83M | ﹤0.01% |
21,454
+20,276
| +1,721% | +$3.64M |
|
1673
PUT
Entegris
ENTG
$19.7B
| $3.81M | ﹤0.01% |
38,500
-10,200
| -21% | -$1.08M |
|
1674
PUT
Insmed
INSM
$23.2B
| $3.8M | ﹤0.01% |
55,100
-136,800
| -71% | -$9.85M |
|
1675
PUT
Pentair
PNR
$10.2B
| $3.8M | ﹤0.01% |
37,800
+24,100
| +176% | +$2.47M |
|
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.