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 | |
|---|---|---|---|---|---|---|
4201
PUT
Krystal Biotech
KRYS
$10.7B
| $266K | ﹤0.01% |
1,700
-2,800
| -62% | -$497K |
|
4202
Direxion Daily NYSE FANG+ Bull 2X ETF
FNGG
$115M
| $265K | ﹤0.01% |
+1,477
| New | +$242K |
|
4203
CALL
MidCap Financial Investment
MFIC
$811M
| $265K | ﹤0.01% |
19,700
+11,600
| +143% | +$158K |
|
|
DRD
4204
PUT
DRDGold
DRD
$1.79B
| $264K | ﹤0.01% |
30,600
-25,500
| -45% | -$259K |
|
4205
PUT
Ormat Technologies
ORA
$6.05B
| $264K | ﹤0.01% |
3,900
+2,500
| +179% | +$193K |
|
|
VRN
4206
CALL
DELISTED
Veren
VRN
| $264K | ﹤0.01% |
51,500
-34,100
| -40% | -$187K |
|
4207
Invesco Senior Loan ETF
BKLN
$6.97B
| $263K | ﹤0.01% |
12,528
+4,844
| +63% | +$102K |
|
4208
PUT
Regal Rexnord
RRX
$13.5B
| $263K | ﹤0.01% |
1,700
-16,400
| -91% | -$2.77M |
|
4209
CALL
SiteOne Landscape Supply
SITE
$4.58B
| $263K | ﹤0.01% |
2,000
-1,300
| -39% | -$188K |
|
4210
Sportsman's Warehouse
SPWH
$45.7M
| $263K | ﹤0.01% |
+98,544
| New | +$247K |
|
4211
PUT
Terex
TEX
$7.84B
| $263K | ﹤0.01% |
5,700
-9,200
| -62% | -$480K |
|
|
LOGC
4212
CALL
DELISTED
ContextLogic
LOGC
| $263K | ﹤0.01% |
209,000
+1,800
| +0.9% | +$12K |
|
|
ASRT
4213
CALL
DELISTED
Assertio
ASRT
| $262K | ﹤0.01% |
20,107
+1,314
| +7% | +$19.6K |
|
4214
PUT
Dover
DOV
$27.4B
| $262K | ﹤0.01% |
1,400
-5,700
| -80% | -$1.11M |
|
4215
State Street SPDR EURO STOXX 50 ETF
FEZ
$4.32B
| $262K | ﹤0.01% |
+5,450
| New | +$272K |
|
4216
CALL
LegalZoom.com
LZ
$1.39B
| $262K | ﹤0.01% |
34,900
-5,000
| -13% | -$37.7K |
|
4217
CALL
Metropolitan Bank Holding Corp
MCB
$1.14B
| $262K | ﹤0.01% |
4,500
+3,400
| +309% | +$204K |
|
4218
CALL
ProPetro Holding
PUMP
$1.31B
| $262K | ﹤0.01% |
28,100
+27,100
| +2,710% | +$223K |
|
4219
Xylem
XYL
$29.2B
| $262K | ﹤0.01% |
+2,261
| New | +$286K |
|
4220
CALL
Boise Cascade
BCC
$2.83B
| $261K | ﹤0.01% |
2,200
-4,600
| -68% | -$635K |
|
4221
CALL
Black Stone Minerals
BSM
$3.14B
| $261K | ﹤0.01% |
17,900
-4,600
| -20% | -$68.6K |
|
4222
Dorian LPG
LPG
$1.9B
| $261K | ﹤0.01% |
+10,721
| New | +$300K |
|
4223
PUT
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.17B
| $261K | ﹤0.01% |
2,100
-5,000
| -70% | -$323K |
|
4224
CALL
Gossamer Bio
GOSS
$100M
| $260K | ﹤0.01% |
288,100
-4,200
| -1% | -$3.6K |
|
4225
Intercontinental Exchange
ICE
$86.4B
| $260K | ﹤0.01% |
+1,745
| New | +$276K |
|
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.