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 | |
|---|---|---|---|---|---|---|
5626
Intapp
INTA
$2.52B
| $63K | ﹤0.01% |
+987
| New | +$56.6K |
|
5627
PUT
MillerKnoll
MLKN
$1.53B
| $63K | ﹤0.01% |
2,800
+2,100
| +300% | +$50.7K |
|
5628
CALL
PLAYSTUDIOS Inc
MYPS
$77.9M
| $63K | ﹤0.01% |
34,300
-15,600
| -31% | -$26.7K |
|
5629
Outset Medical
OM
$84.7M
| $63K | ﹤0.01% |
3,789
+2,951
| +352% | +$36.8K |
|
|
ORGN
5630
PUT
DELISTED
Origin Materials
ORGN
| $63K | ﹤0.01% |
1,653
-1,604
| -49% | -$60.9K |
|
5631
CALL
StepStone Group
STEP
$3.61B
| $63K | ﹤0.01% |
+1,100
| New | +$68.2K |
|
5632
PUT
Talkspace
TALK
$874M
| $63K | ﹤0.01% |
+20,400
| New | +$62.1K |
|
5633
ProShares Ultra Bloomberg Crude Oil
UCO
$420M
| $63K | ﹤0.01% |
2,296
-33,359
| -94% | -$886K |
|
5634
AngioDynamics
ANGO
$611M
| $62K | ﹤0.01% |
+6,805
| New | +$50K |
|
|
EPIX
5635
CALL
DELISTED
ESSA Pharma
EPIX
| $62K | ﹤0.01% |
+35,100
| New | +$112K |
|
5636
CALL
Ezcorp Inc
EZPW
$1.83B
| $62K | ﹤0.01% |
5,100
-19,600
| -79% | -$233K |
|
5637
CALL
Goldman Sachs BDC
GSBD
$969M
| $62K | ﹤0.01% |
5,200
-3,600
| -41% | -$47.3K |
|
|
HITI
5638
PUT
High Tide
HITI
$186M
| $62K | ﹤0.01% |
20,100
-10,000
| -33% | -$28.3K |
|
5639
PUT
Henry Schein
HSIC
$9.77B
| $62K | ﹤0.01% |
900
-4,100
| -82% | -$294K |
|
5640
CALL
J&J Snack Foods
JJSF
$1.43B
| $62K | ﹤0.01% |
+400
| New | +$67K |
|
5641
Kratos Defense & Security Solutions
KTOS
$8.74B
| $62K | ﹤0.01% |
2,356
+1,426
| +153% | +$36.5K |
|
5642
PUT
LCI Industries
LCII
$2.49B
| $62K | ﹤0.01% |
600
-700
| -54% | -$80.7K |
|
5643
PUT
MasterCraft Boat Holdings
MCFT
$579M
| $62K | ﹤0.01% |
3,300
-22,900
| -87% | -$438K |
|
5644
PUT
MKS Inc
MKSI
$20.1B
| $62K | ﹤0.01% |
600
-6,200
| -91% | -$669K |
|
5645
VanEck Agribusiness ETF
MOO
$972M
| $62K | ﹤0.01% |
963
-17,133
| -95% | -$1.22M |
|
5646
National Fuel Gas
NFG
$7.82B
| $62K | ﹤0.01% |
1,022
-12,132
| -92% | -$743K |
|
5647
Progress Software
PRGS
$1.66B
| $62K | ﹤0.01% |
953
-10,396
| -92% | -$694K |
|
5648
RingCentral
RNG
$4.66B
| $62K | ﹤0.01% |
+1,786
| New | +$64.2K |
|
5649
CALL
Regal Rexnord
RRX
$13.7B
| $62K | ﹤0.01% |
400
-20,300
| -98% | -$3.43M |
|
5650
CALL
Spok Holdings
SPOK
$228M
| $62K | ﹤0.01% |
3,900
+1,300
| +50% | +$20.6K |
|
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.