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 | |
|---|---|---|---|---|---|---|
6601
PUT
Healthcare Realty
HR
$7.31B
| $22K | ﹤0.01% |
1,300
-83,200
| -98% | -$1.46M |
|
6602
CALL
Heritage Insurance Holdings
HRTG
$895M
| $22K | ﹤0.01% |
1,900
-15,300
| -89% | -$176K |
|
|
IMMP
6603
Immutep
IMMP
$57M
| $22K | ﹤0.01% |
+10,302
| New | +$20.7K |
|
6604
PUT
IZEA Worldwide
IZEA
$59.5M
| $22K | ﹤0.01% |
+8,300
| New | +$22.3K |
|
6605
Lear
LEA
$7.17B
| $22K | ﹤0.01% |
+240
| New | +$23.9K |
|
6606
PUT
MarketAxess Holdings
MKTX
$5.73B
| $22K | ﹤0.01% |
100
-700
| -88% | -$184K |
|
|
NSA
6607
PUT
DELISTED
National Storage Affiliates Trust
NSA
| $22K | ﹤0.01% |
600
-100
| -14% | -$4.28K |
|
6608
Odyssey Marine Exploration
OMEX
$36.4M
| $22K | ﹤0.01% |
31,522
-89,965
| -74% | -$45.6K |
|
6609
Playboy Inc
PLBY
$132M
| $22K | ﹤0.01% |
15,140
-4,771
| -24% | -$5.53K |
|
6610
Palomar
PLMR
$3.59B
| $22K | ﹤0.01% |
212
-5,863
| -97% | -$595K |
|
6611
PUT
Primoris Services
PRIM
$4.6B
| $22K | ﹤0.01% |
300
+100
| +50% | +$7.3K |
|
|
HTT
6612
CALL
High Templar Tech Ltd
HTT
$374M
| $22K | ﹤0.01% |
+7,900
| New | +$19.9K |
|
|
RDUS
6613
PUT
DELISTED
Radius Recycling
RDUS
| $22K | ﹤0.01% |
1,500
| – | – |
|
6614
PUT
Rockwell Medical
RMTI
$28M
| $22K | ﹤0.01% |
1,080
+160
| +17% | +$4.67K |
|
|
SEVN
6615
PUT
Seven Hills Realty Trust
SEVN
$169M
| $22K | ﹤0.01% |
1,700
+200
| +13% | +$2.67K |
|
6616
CALL
Protara Therapeutics
TARA
$220M
| $22K | ﹤0.01% |
+4,200
| New | +$13.6K |
|
6617
PUT
Universal Electronics
UEIC
$58.9M
| $22K | ﹤0.01% |
2,000
+1,200
| +150% | +$12K |
|
6618
PUT
UFP Industries
UFPI
$4.9B
| $22K | ﹤0.01% |
200
-300
| -60% | -$38.7K |
|
6619
PUT
Vivani Medical
VANI
$113M
| $22K | ﹤0.01% |
19,600
-16,800
| -46% | -$21.3K |
|
6620
Viavi Solutions
VIAV
$8.97B
| $22K | ﹤0.01% |
2,253
-29,979
| -93% | -$296K |
|
6621
CALL
Vera Bradley
VRA
$97.3M
| $22K | ﹤0.01% |
5,700
-700
| -11% | -$3.49K |
|
6622
PUT
VirTra
VTSI
$35.1M
| $22K | ﹤0.01% |
3,300
-5,400
| -62% | -$36.4K |
|
6623
CALL
WaFd
WAFD
$2.69B
| $22K | ﹤0.01% |
700
+500
| +250% | +$17.6K |
|
6624
Worthington Steel
WS
$1.76B
| $22K | ﹤0.01% |
+702
| New | +$27.4K |
|
6625
PUT
WisdomTree
WT
$2.92B
| $22K | ﹤0.01% |
2,100
+100
| +5% | +$1.08K |
|
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.