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 | |
|---|---|---|---|---|---|---|
4376
CALL
iHeartMedia
IHRT
$534M
| $228K | ﹤0.01% |
115,600
+104,200
| +914% | +$221K |
|
4377
Royal Caribbean
RCL
$86.7B
| $228K | ﹤0.01% |
+990
| New | +$219K |
|
|
CNR
4378
CALL
Core Natural Resources Inc
CNR
$3.92B
| $228K | ﹤0.01% |
33,800
+700
| +2% | +$80.6K |
|
|
BMTX
4379
CALL
DELISTED
BM Technologies, Inc.
BMTX
| $228K | ﹤0.01% |
46,700
-3,500
| -7% | -$15.2K |
|
|
SAVE
4380
CALL
DELISTED
Spirit Airlines, Inc.
SAVE
| $228K | ﹤0.01% |
682,100
-387,400
| -36% | -$844K |
|
4381
PUT
Appian
APPN
$2.11B
| $227K | ﹤0.01% |
6,900
-6,800
| -50% | -$243K |
|
|
AZEK
4382
PUT
DELISTED
The AZEK Co
AZEK
| $227K | ﹤0.01% |
4,800
+3,900
| +433% | +$186K |
|
4383
Brookfield Renewable
BEP
$9.55B
| $227K | ﹤0.01% |
+9,969
| New | +$255K |
|
4384
CALL
FirstCash
FCFS
$8.75B
| $227K | ﹤0.01% |
2,200
+1,600
| +267% | +$172K |
|
4385
CALL
Monte Rosa Therapeutics
GLUE
$1.79B
| $227K | ﹤0.01% |
32,800
+4,600
| +16% | +$34.5K |
|
4386
Medifast
MED
$107M
| $227K | ﹤0.01% |
12,885
+10,551
| +452% | +$196K |
|
4387
Taboola.com
TBLA
$1.42B
| $227K | ﹤0.01% |
62,427
-29,943
| -32% | -$107K |
|
4388
PUT
Astrana Health
ASTH
$1.8B
| $227K | ﹤0.01% |
7,200
+600
| +9% | +$28.5K |
|
4389
CALL
Designer Brands
DBI
$316M
| $226K | ﹤0.01% |
42,400
+26,000
| +159% | +$146K |
|
4390
CALL
Evolus
EOLS
$392M
| $226K | ﹤0.01% |
20,500
-6,600
| -24% | -$92.8K |
|
4391
CALL
Haemonetics
HAE
$3.88B
| $226K | ﹤0.01% |
2,900
+2,000
| +222% | +$161K |
|
4392
PUT
RXO
RXO
$3.69B
| $226K | ﹤0.01% |
9,500
+5,200
| +121% | +$145K |
|
4393
Aldeyra Therapeutics
ALDX
$95.3M
| $225K | ﹤0.01% |
+45,232
| New | +$232K |
|
4394
PUT
TechnipFMC
FTI
$28.6B
| $225K | ﹤0.01% |
7,800
-6,600
| -46% | -$188K |
|
4395
Kimco Realty
KIM
$17.5B
| $225K | ﹤0.01% |
+9,635
| New | +$233K |
|
4396
American Eagle Outfitters
AEO
$2.92B
| $224K | ﹤0.01% |
13,471
-170,119
| -93% | -$3.22M |
|
4397
PUT
American Century Diversified Corporate Bond ETF
KORP
$869M
| $224K | ﹤0.01% |
3,300
+2,800
| +560% | +$131K |
|
4398
PUT
Thomson Reuters
TRI
$46.5B
| $224K | ﹤0.01% |
1,378
-788
| -36% | -$133K |
|
4399
ARK Blockchain & Fintech Innovation ETF
ARKF
$731M
| $223K | ﹤0.01% |
+6,031
| New | +$214K |
|
4400
CALL
Genpact
G
$6.2B
| $223K | ﹤0.01% |
5,200
-4,600
| -47% | -$194K |
|
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.