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 | |
|---|---|---|---|---|---|---|
1776
iShares Gold Trust
IAU
$63B
| $3.33M | ﹤0.01% |
+67,330
| New | +$3.38M |
|
1777
PUT
Veralto
VLTO
$22.6B
| $3.33M | ﹤0.01% |
32,700
+2,100
| +7% | +$224K |
|
1778
CALL
O'Reilly Automotive
ORLY
$72.4B
| $3.32M | ﹤0.01% |
42,000
+1,500
| +4% | +$121K |
|
1779
PUT
Recursion Pharmaceuticals
RXRX
$1.57B
| $3.31M | ﹤0.01% |
489,800
+96,800
| +25% | +$651K |
|
1780
PUT
Annaly Capital Management
NLY
$16.9B
| $3.31M | ﹤0.01% |
180,800
+40,400
| +29% | +$789K |
|
1781
CALL
Atlas Energy Solutions
AESI
$1.49B
| $3.3M | ﹤0.01% |
149,000
+62,100
| +71% | +$1.34M |
|
|
TGNA
1782
PUT
DELISTED
TEGNA Inc
TGNA
| $3.3M | ﹤0.01% |
180,600
+178,400
| +8,109% | +$3.12M |
|
|
BABO
1783
PUT
YieldMax BABA Option Income Strategy ETF
BABO
$13.7M
| $3.3M | ﹤0.01% |
+141,700
| New | +$2.82M |
|
1784
CALL
Icahn Enterprises
IEP
$5.17B
| $3.29M | ﹤0.01% |
380,000
-87,000
| -19% | -$1.05M |
|
1785
CALL
Immunovant
IMVT
$8.09B
| $3.28M | ﹤0.01% |
132,500
+90,000
| +212% | +$2.55M |
|
1786
CALL
FormFactor
FORM
$8.11B
| $3.27M | ﹤0.01% |
74,400
+73,100
| +5,623% | +$3.14M |
|
1787
CRISPR Therapeutics
CRSP
$4.58B
| $3.27M | ﹤0.01% |
83,134
+16,254
| +24% | +$768K |
|
1788
CALL
Clean Harbors
CLH
$16.1B
| $3.27M | ﹤0.01% |
14,200
-5,200
| -27% | -$1.29M |
|
1789
CALL
Acadia Healthcare
ACHC
$3.17B
| $3.26M | ﹤0.01% |
82,300
+70,200
| +580% | +$3.17M |
|
1790
CALL
Plains GP Holdings
PAGP
$5.23B
| $3.26M | ﹤0.01% |
177,500
-45,300
| -20% | -$842K |
|
1791
PUT
Invesco
IVZ
$13.3B
| $3.26M | ﹤0.01% |
186,400
-36,700
| -16% | -$654K |
|
1792
CALL
Celanese
CE
$5.09B
| $3.25M | ﹤0.01% |
47,000
+31,800
| +209% | +$3.06M |
|
1793
AdvisorShares Pure US Cannabis ETF
MSOS
$864M
| $3.25M | ﹤0.01% |
853,495
+540,009
| +172% | +$2.91M |
|
1794
PUT
Post Holdings
POST
$4.12B
| $3.24M | ﹤0.01% |
28,300
-38,700
| -58% | -$4.41M |
|
1795
CALL
Papa John's
PZZA
$999M
| $3.23M | ﹤0.01% |
78,700
-160,200
| -67% | -$7.87M |
|
1796
CALL
Carbon Collective Climate Solutions US Equity ETF
CCSO
$45.3M
| $3.22M | ﹤0.01% |
150,500
-60,500
| -29% | -$1.27M |
|
|
KEEL
1797
CALL
Keel Infrastructure Corp
KEEL
$2.57B
| $3.21M | ﹤0.01% |
2,155,200
+1,442,400
| +202% | +$2.88M |
|
|
MZTI
1798
CALL
The Marzetti Company
MZTI
$2.94B
| $3.2M | ﹤0.01% |
18,500
+6,100
| +49% | +$1.12M |
|
1799
CALL
Crane Co
CR
$13.1B
| $3.2M | ﹤0.01% |
21,100
+16,500
| +359% | +$2.72M |
|
1800
PUT
Universal Display
OLED
$3.71B
| $3.2M | ﹤0.01% |
21,900
-39,900
| -65% | -$7.11M |
|
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.