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 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$272M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$99M |
| 3 |
NVIDIA
NVDA
|
+$89.9M |
| 4 |
TSMC
TSM
|
+$87.7M |
| 5 |
Amazon
AMZN
|
+$61M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$518M |
| 2 |
Strategy Inc
MSTR
|
+$81.2M |
| 3 |
Alibaba
BABA
|
+$66.7M |
| 4 |
Advanced Micro Devices
AMD
|
+$44.3M |
| 5 |
Uber
UBER
|
+$41.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Consumer Discretionary | 0.22% |
| 3 | Healthcare | 0.17% |
| 4 | Communication Services | 0.15% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
4226
CALL
Metropolitan Bank Holding Corp
MCB
$1.15B
| $218K | ﹤0.01% |
3,900
-600
| -13% | -$35.6K |
|
4227
Navitas Semiconductor
NVTS
$2.54B
| $218K | ﹤0.01% |
106,534
-146,223
| -58% | -$419K |
|
4228
Children's Place
PLCE
$53.8M
| $218K | ﹤0.01% |
+24,995
| New | +$233K |
|
4229
CALL
AbCellera Biologics
ABCL
$1.65B
| $217K | ﹤0.01% |
97,600
+32,300
| +49% | +$92.6K |
|
4230
Copa Holdings
CPA
$5.56B
| $217K | ﹤0.01% |
2,352
-3,166
| -57% | -$294K |
|
4231
PUT
Energy Recovery
ERII
$420M
| $217K | ﹤0.01% |
+13,700
| New | +$208K |
|
|
FOLD
4232
PUT
DELISTED
Amicus Therapeutics
FOLD
| $217K | ﹤0.01% |
26,700
+25,100
| +1,569% | +$232K |
|
4233
CALL
Stem
STEM
$44.3M
| $217K | ﹤0.01% |
31,020
+14,025
| +83% | +$162K |
|
4234
PUT
Tower Semiconductor
TSEM
$21.2B
| $217K | ﹤0.01% |
6,100
-17,800
| -74% | -$804K |
|
4235
CALL
Amneal Pharmaceuticals
AMRX
$6.1B
| $216K | ﹤0.01% |
25,800
+20,800
| +416% | +$174K |
|
|
CGC
4236
PUT
Canopy Growth
CGC
$376M
| $216K | ﹤0.01% |
237,900
-97,300
| -29% | -$171K |
|
4237
CALL
Ingredion
INGR
$6.42B
| $216K | ﹤0.01% |
1,600
+1,200
| +300% | +$159K |
|
4238
iShares Russell Mid-Cap Growth ETF
IWP
$19.4B
| $216K | ﹤0.01% |
+1,840
| New | +$237K |
|
|
LOMA
4239
Loma Negra
LOMA
$1.34B
| $216K | ﹤0.01% |
19,725
+3,711
| +23% | +$42.4K |
|
4240
CALL
Microvast
MVST
$237M
| $216K | ﹤0.01% |
184,900
-178,500
| -49% | -$310K |
|
4241
CALL
Oshkosh
OSK
$8.91B
| $216K | ﹤0.01% |
2,300
-2,500
| -52% | -$250K |
|
4242
CALL
Synaptics
SYNA
$4.05B
| $216K | ﹤0.01% |
3,400
+700
| +26% | +$50.7K |
|
|
TUYA
4243
PUT
Tuya Inc
TUYA
$1.04B
| $216K | ﹤0.01% |
+71,300
| New | +$211K |
|
|
CRESY
4244
CALL
Cresud
CRESY
$806M
| $215K | ﹤0.01% |
19,665
+17,346
| +748% | +$201K |
|
4245
Ginkgo Bioworks
DNA
$498M
| $215K | ﹤0.01% |
37,775
-9,328
| -20% | -$95K |
|
4246
CALL
East-West Bancorp
EWBC
$17.8B
| $215K | ﹤0.01% |
2,400
-1,000
| -29% | -$95.4K |
|
4247
CALL
Kennametal
KMT
$2.56B
| $215K | ﹤0.01% |
10,100
-1,200
| -11% | -$27.2K |
|
4248
CALL
Medifast
MED
$107M
| $215K | ﹤0.01% |
16,000
+300
| +2% | +$4.51K |
|
4249
PUT
Ryder
R
$9.9B
| $215K | ﹤0.01% |
1,500
+1,400
| +1,400% | +$218K |
|
4250
PUT
Redwire
RDW
$1.86B
| $215K | ﹤0.01% |
26,000
+13,700
| +111% | +$227K |
|
Similar funds
Simplex Trading's Q1 2025 Portfolio in Review
As of Q1 2025, Simplex Trading held 10,070 positions worth $156B, down 13% from $179B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $7.93B in Q1 2025, closing 1,547 positions and reducing 3,654 holdings. Its most notable exit was Alibaba, an estimated $66.7M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.68% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares 20+ Year Treasury Bond ETF worth $278M.
- Simplex Trading's largest Q1 2025 buy was iShares 20+ Year Treasury Bond ETF: 3,057,978 shares worth $278M.
- Simplex Trading added most to NVIDIA in Q1 2025, an estimated $89.9M increase.
- Simplex Trading's biggest Q1 2025 reduction was Apple, cutting an estimated $518M.
- Simplex Trading fully exited Alibaba in Q1 2025, selling an estimated $66.7M.
- Simplex Trading's ten largest holdings make up 51% of its $156B portfolio in Q1 2025.
- Simplex Trading opened 1,566 new positions and closed 1,547 in Q1 2025.
- Simplex Trading's portfolio value fell 13% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q1 2025, filed 12 May 2025.