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 | |
|---|---|---|---|---|---|---|
4226
CALL
Inseego
INSG
$111M
| $260K | ﹤0.01% |
25,400
+100
| +0.4% | +$1.47K |
|
|
DNB
4227
CALL
DELISTED
Dun & Bradstreet
DNB
| $259K | ﹤0.01% |
20,800
+6,400
| +44% | +$76.5K |
|
4228
PUT
Waters Corp
WAT
$37.7B
| $259K | ﹤0.01% |
700
-800
| -53% | -$293K |
|
4229
CALL
Cohen & Steers
CNS
$4.24B
| $258K | ﹤0.01% |
+2,800
| New | +$277K |
|
4230
ProShares UltraShort Euro
EUO
$35.5M
| $258K | ﹤0.01% |
7,392
+7,385
| +105,500% | +$242K |
|
4231
CALL
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$543M
| $258K | ﹤0.01% |
4,500
-5,100
| -53% | -$274K |
|
4232
Cardlytics
CDLX
$22.3M
| $257K | ﹤0.01% |
6,948
+5,198
| +297% | +$199K |
|
4233
CALL
EXL Service
EXLS
$4.66B
| $257K | ﹤0.01% |
5,800
-2,600
| -31% | -$112K |
|
|
KC
4234
PUT
Kingsoft Cloud Holdings
KC
$3.03B
| $257K | ﹤0.01% |
24,500
+15,100
| +161% | +$86K |
|
4235
CALL
Ligand Pharmaceuticals
LGND
$5.94B
| $257K | ﹤0.01% |
2,400
-4,100
| -63% | -$463K |
|
4236
PUT
LivePerson
LPSN
$22.9M
| $257K | ﹤0.01% |
11,307
+6,354
| +128% | +$97.2K |
|
4237
PUT
OneSpan
OSPN
$572M
| $257K | ﹤0.01% |
13,900
-19,400
| -58% | -$330K |
|
4238
Vanguard FTSE Europe ETF
VGK
$30.2B
| $257K | ﹤0.01% |
+4,060
| New | +$271K |
|
4239
PUT
Akebia Therapeutics
AKBA
$341M
| $256K | ﹤0.01% |
135,100
+110,300
| +445% | +$192K |
|
|
HUYA
4240
Huya Inc
HUYA
$561M
| $256K | ﹤0.01% |
83,616
+74,276
| +795% | +$264K |
|
4241
CALL
NETGEAR
NTGR
$663M
| $256K | ﹤0.01% |
9,200
+700
| +8% | +$16.5K |
|
4242
Shoals Technologies Group
SHLS
$1.43B
| $256K | ﹤0.01% |
46,381
-18,730
| -29% | -$95.1K |
|
4243
CALL
Stoneridge
SRI
$208M
| $256K | ﹤0.01% |
+40,900
| New | +$314K |
|
4244
CALL
Trinity Industries
TRN
$3.03B
| $256K | ﹤0.01% |
7,300
-3,300
| -31% | -$119K |
|
4245
Dave Inc
DAVE
$5.17B
| $255K | ﹤0.01% |
2,944
+2,477
| +530% | +$166K |
|
4246
iShares Global Clean Energy ETF
ICLN
$2.27B
| $255K | ﹤0.01% |
22,456
-73,665
| -77% | -$932K |
|
4247
Direxion Daily NVDA Bull 2X ETF
NVDU
$532M
| $255K | ﹤0.01% |
2,727
+874
| +47% | +$99.7K |
|
4248
ScottsMiracle-Gro
SMG
$4.25B
| $255K | ﹤0.01% |
+3,845
| New | +$304K |
|
4249
Westlake Corp
WLK
$9.25B
| $255K | ﹤0.01% |
+2,229
| New | +$290K |
|
4250
CALL
Brookfield Asset Management
BAM
$76.7B
| $254K | ﹤0.01% |
4,700
-800
| -15% | -$43.2K |
|
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.