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 | |
|---|---|---|---|---|---|---|
4401
PUT
Howard Hughes
HHH
$4B
| $223K | ﹤0.01% |
2,900
-9,100
| -76% | -$725K |
|
|
PSTL
4402
CALL
Postal Realty Trust
PSTL
$700M
| $223K | ﹤0.01% |
17,100
+2,600
| +18% | +$36.5K |
|
|
NSLR
4403
Neostellar Capital Corp
NSLR
$259M
| $223K | ﹤0.01% |
37,968
+12,860
| +51% | +$65.8K |
|
|
NVRO
4404
DELISTED
NEVRO CORP.
NVRO
| $223K | ﹤0.01% |
+60,055
| New | +$277K |
|
4405
Bioventus
BVS
$901M
| $222K | ﹤0.01% |
21,180
+20,491
| +2,974% | +$242K |
|
4406
iShares MSCI Mexico ETF
EWW
$1.88B
| $221K | ﹤0.01% |
+4,727
| New | +$244K |
|
4407
Invesco CurrencyShares Canadian Dollar Trust
FXC
$72.8M
| $221K | ﹤0.01% |
3,252
+3,124
| +2,441% | +$218K |
|
|
DEA
4408
CALL
Easterly Government Properties
DEA
$1.18B
| $220K | ﹤0.01% |
7,760
-20,440
| -72% | -$649K |
|
4409
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$276M
| $220K | ﹤0.01% |
3,400
-11,600
| -77% | -$753K |
|
4410
PUT
Marqeta
MQ
$1.92B
| $220K | ﹤0.01% |
14,575
-18,100
| -55% | -$318K |
|
4411
Direxion Daily MSFT Bull 2X ETF
MSFU
$828M
| $220K | ﹤0.01% |
5,593
+5,032
| +897% | +$213K |
|
4412
CALL
Mission Produce
AVO
$1.13B
| $219K | ﹤0.01% |
15,300
-54,700
| -78% | -$707K |
|
4413
CALL
Cabaletta Bio
CABA
$429M
| $219K | ﹤0.01% |
96,800
+88,300
| +1,039% | +$310K |
|
4414
CALL
Fabrinet
FN
$14.5B
| $219K | ﹤0.01% |
1,000
-6,100
| -86% | -$1.47M |
|
4415
HEICO Corp Class A
HEI.A
$35.8B
| $219K | ﹤0.01% |
1,177
+915
| +349% | +$184K |
|
|
NGD
4416
PUT
DELISTED
New Gold Inc
NGD
| $219K | ﹤0.01% |
88,700
+8,800
| +11% | +$24.3K |
|
4417
CALL
Tetra Tech
TTEK
$8.92B
| $219K | ﹤0.01% |
5,500
+2,800
| +104% | +$126K |
|
4418
Viper Energy
VNOM
$8.42B
| $219K | ﹤0.01% |
+4,474
| New | +$230K |
|
|
LAND
4419
PUT
Gladstone Land Corp
LAND
$366M
| $218K | ﹤0.01% |
20,100
+2,200
| +12% | +$27.3K |
|
4420
PUT
Neurocrine Biosciences
NBIX
$18.2B
| $218K | ﹤0.01% |
1,600
-19,800
| -93% | -$2.45M |
|
4421
CALL
Polaris
PII
$3.79B
| $218K | ﹤0.01% |
3,800
-5,300
| -58% | -$369K |
|
4422
CALL
Portland General Electric
POR
$5.87B
| $218K | ﹤0.01% |
5,000
+1,800
| +56% | +$83.8K |
|
4423
PUT
Caleres
CAL
$432M
| $217K | ﹤0.01% |
9,400
-21,600
| -70% | -$633K |
|
4424
CALL
CG Oncology
CGON
$6.11B
| $217K | ﹤0.01% |
7,600
+2,200
| +41% | +$75.3K |
|
4425
PUT
Playtika
PLTK
$1.51B
| $217K | ﹤0.01% |
31,400
-22,900
| -42% | -$180K |
|
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.