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 | |
|---|---|---|---|---|---|---|
5051
Immunic
IMUX
$191M
| $115K | ﹤0.01% |
11,596
+7,945
| +218% | +$100K |
|
|
JFIN
5052
PUT
Jiayin Group
JFIN
$116M
| $115K | ﹤0.01% |
18,100
-17,100
| -49% | -$114K |
|
|
MREO
5053
PUT
Mereo BioPharma
MREO
$50.3M
| $115K | ﹤0.01% |
33,000
-700
| -2% | -$2.75K |
|
5054
CALL
Oppenheimer Holdings
OPY
$1.19B
| $115K | ﹤0.01% |
+1,800
| New | +$104K |
|
5055
PUT
RLX Technology
RLX
$2.42B
| $115K | ﹤0.01% |
53,600
+6,200
| +13% | +$11.2K |
|
|
SHCO
5056
DELISTED
Soho House & Co
SHCO
| $115K | ﹤0.01% |
15,452
-2,403
| -13% | -$13.1K |
|
|
VOXX
5057
CALL
DELISTED
VOXX International Corporation Class A
VOXX
| $115K | ﹤0.01% |
15,600
-11,400
| -42% | -$83.5K |
|
5058
CALL
Apogee Enterprises
APOG
$832M
| $114K | ﹤0.01% |
1,600
-200
| -11% | -$15.7K |
|
|
BRDG
5059
CALL
DELISTED
Bridge Investment Group
BRDG
| $114K | ﹤0.01% |
13,600
+4,600
| +51% | +$45.2K |
|
5060
Delcath Systems
DCTH
$416M
| $114K | ﹤0.01% |
9,501
+6,235
| +191% | +$65.8K |
|
5061
PUT
NetSol Technologies
NTWK
$50.8M
| $114K | ﹤0.01% |
43,800
+5,900
| +16% | +$16.9K |
|
|
ATSG
5062
PUT
DELISTED
Air Transport Services Group
ATSG
| $114K | ﹤0.01% |
5,200
-16,800
| -76% | -$332K |
|
|
APLT
5063
CALL
DELISTED
Applied Therapeutics
APLT
| $113K | ﹤0.01% |
132,400
+57,300
| +76% | +$359K |
|
5064
PUT
FirstCash
FCFS
$8.76B
| $113K | ﹤0.01% |
1,100
+900
| +450% | +$97K |
|
5065
CALL
MBIA
MBI
$274M
| $113K | ﹤0.01% |
17,900
+1,000
| +6% | +$5.16K |
|
5066
Middleby
MIDD
$6.03B
| $113K | ﹤0.01% |
+836
| New | +$115K |
|
|
ORGN
5067
CALL
DELISTED
Origin Materials
ORGN
| $113K | ﹤0.01% |
2,957
-983
| -25% | -$37.3K |
|
5068
CALL
Archrock
AROC
$6.21B
| $112K | ﹤0.01% |
4,500
-19,200
| -81% | -$445K |
|
5069
PUT
Avery Dennison
AVY
$13.4B
| $112K | ﹤0.01% |
600
+500
| +500% | +$102K |
|
5070
Grid Dynamics Holdings
GDYN
$590M
| $112K | ﹤0.01% |
5,039
+4,724
| +1,500% | +$82.5K |
|
5071
PUT
MSC Industrial Direct
MSM
$6.78B
| $112K | ﹤0.01% |
1,500
-5,900
| -80% | -$486K |
|
|
ME
5072
DELISTED
23andMe Holding Co
ME
| $112K | ﹤0.01% |
34,499
+32,426
| +1,564% | +$141K |
|
5073
CALL
Galectin Therapeutics
GALT
$213M
| $111K | ﹤0.01% |
86,400
-7,300
| -8% | -$17.5K |
|
5074
Lightbridge
LTBR
$277M
| $111K | ﹤0.01% |
23,468
+19,483
| +489% | +$116K |
|
|
RC
5075
PUT
Ready Capital
RC
$261M
| $111K | ﹤0.01% |
16,300
-30,700
| -65% | -$221K |
|
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.