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 | |
|---|---|---|---|---|---|---|
|
ARI
4301
Apollo Commercial Real Estate
ARI
$883M
| $244K | ﹤0.01% |
+28,221
| New | +$254K |
|
4302
CALL
International Seaways
INSW
$4.64B
| $244K | ﹤0.01% |
6,800
+900
| +15% | +$38.3K |
|
4303
PUT
Mattel
MAT
$4.46B
| $244K | ﹤0.01% |
13,800
-900
| -6% | -$17K |
|
4304
PUT
Phreesia
PHR
$678M
| $244K | ﹤0.01% |
9,700
-3,600
| -27% | -$76.9K |
|
4305
CALL
Playtika
PLTK
$1.54B
| $244K | ﹤0.01% |
35,300
-26,800
| -43% | -$211K |
|
4306
PUT
Americold
COLD
$4.22B
| $243K | ﹤0.01% |
11,400
+8,000
| +235% | +$194K |
|
4307
Eos Energy Enterprises
EOSE
$1.2B
| $243K | ﹤0.01% |
50,087
-191,792
| -79% | -$621K |
|
4308
CALL
Lincoln Electric
LECO
$14.4B
| $243K | ﹤0.01% |
1,300
-400
| -24% | -$80.6K |
|
4309
PUT
Mercer International
MERC
$44.5M
| $243K | ﹤0.01% |
37,500
+16,300
| +77% | +$107K |
|
|
PLL
4310
PUT
DELISTED
Piedmont Lithium
PLL
| $243K | ﹤0.01% |
27,900
+9,800
| +54% | +$115K |
|
4311
CALL
Westrock Coffee
WEST
$807M
| $243K | ﹤0.01% |
37,900
-36,200
| -49% | -$248K |
|
|
QXO
4312
PUT
QXO Inc
QXO
$14.4B
| $243K | ﹤0.01% |
15,300
-17,100
| -53% | -$269K |
|
|
GOEV
4313
PUT
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $243K | ﹤0.01% |
398,900
+369,435
| +1,254% | +$4.02M |
|
4314
Academy Sports + Outdoors
ASO
$3.11B
| $242K | ﹤0.01% |
4,221
-11,135
| -73% | -$587K |
|
|
PBT
4315
Permian Basin Royalty Trust
PBT
$1.4B
| $242K | ﹤0.01% |
+21,862
| New | +$262K |
|
4316
Weatherford International
WFRD
$6.09B
| $242K | ﹤0.01% |
3,383
+3,184
| +1,600% | +$261K |
|
4317
Aehr Test Systems
AEHR
$2.28B
| $241K | ﹤0.01% |
14,515
-6,647
| -31% | -$88.6K |
|
4318
PUT
CenterPoint Energy
CNP
$29.1B
| $241K | ﹤0.01% |
7,600
-40,700
| -84% | -$1.25M |
|
4319
CALL
Empire State Realty Trust
ESRT
$1.01B
| $241K | ﹤0.01% |
23,400
-29,400
| -56% | -$319K |
|
|
KREF
4320
KKR Real Estate Finance Trust
KREF
$464M
| $241K | ﹤0.01% |
23,899
-18,365
| -43% | -$210K |
|
4321
CALL
Prosperity Bancshares
PB
$8.92B
| $241K | ﹤0.01% |
3,200
-100
| -3% | -$7.72K |
|
4322
CVR Partners
UAN
$1.29B
| $241K | ﹤0.01% |
3,182
-6,882
| -68% | -$498K |
|
4323
CALL
United Microelectronic
UMC
$44B
| $241K | ﹤0.01% |
37,200
+2,500
| +7% | +$17.9K |
|
4324
CALL
Alector
ALEC
$169M
| $240K | ﹤0.01% |
+127,000
| New | +$478K |
|
4325
PUT
FerroAtlántica
GSM
$613M
| $240K | ﹤0.01% |
63,400
-77,200
| -55% | -$331K |
|
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.