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 | |
|---|---|---|---|---|---|---|
6226
Vanguard Russell 1000 ETF
VONE
$8.09B
| $31K | ﹤0.01% |
+124
| New | +$33.2K |
|
6227
CALL
WEX
WEX
$6.42B
| $31K | ﹤0.01% |
200
-2,400
| -92% | -$395K |
|
|
SMCY
6228
YieldMax SMCI Option Income Strategy ETF
SMCY
$97.3M
| $31K | ﹤0.01% |
1,525
-3,163
| -67% | -$79.7K |
|
|
MKFG
6229
CALL
DELISTED
Markforged Holding Corporation
MKFG
| $31K | ﹤0.01% |
6,800
+5,600
| +467% | +$17.1K |
|
6230
Annovis Bio
ANVS
$72.3M
| $30K | ﹤0.01% |
+20,184
| New | +$61.8K |
|
6231
PUT
Atlanta Braves Holdings Series B
BATRK
$3.28B
| $30K | ﹤0.01% |
700
-500
| -42% | -$19.5K |
|
6232
CALL
Bioceres Crop Solutions
BIOX
$20.6M
| $30K | ﹤0.01% |
6,700
+6,500
| +3,250% | +$35.8K |
|
6233
CALL
Breakwave Tanker Shipping ETF
BWET
$33.4M
| $30K | ﹤0.01% |
+4,800
| New | +$53.1K |
|
|
CHCT
6234
CALL
Community Healthcare Trust
CHCT
$536M
| $30K | ﹤0.01% |
1,700
-14,600
| -90% | -$279K |
|
6235
Clarivate
CLVT
$1.38B
| $30K | ﹤0.01% |
+7,738
| New | +$36.6K |
|
6236
Cricut
CRCT
$1.01B
| $30K | ﹤0.01% |
+5,900
| New | +$32.9K |
|
6237
Castor Maritime
CTRM
$18.3M
| $30K | ﹤0.01% |
+13,223
| New | +$34.6K |
|
6238
PUT
Dole
DOLE
$1.38B
| $30K | ﹤0.01% |
2,100
+900
| +75% | +$12.4K |
|
6239
iShares MSCI Italy ETF
EWI
$987M
| $30K | ﹤0.01% |
710
+693
| +4,076% | +$27.8K |
|
6240
CALL
InflaRx
IFRX
$243M
| $30K | ﹤0.01% |
29,700
-70,500
| -70% | -$133K |
|
6241
CALL
Inovio Pharmaceuticals
INO
$85.6M
| $30K | ﹤0.01% |
18,800
-33,300
| -64% | -$66.8K |
|
6242
LoveSac
LOVE
$242M
| $30K | ﹤0.01% |
1,680
+1,589
| +1,746% | +$34.8K |
|
6243
PUT
Ondas Inc
ONDS
$3.87B
| $30K | ﹤0.01% |
28,800
+27,100
| +1,594% | +$40.6K |
|
6244
PUT
Vaxcyte
PCVX
$7.65B
| $30K | ﹤0.01% |
800
-23,100
| -97% | -$1.85M |
|
|
PINC
6245
PUT
DELISTED
Premier
PINC
| $30K | ﹤0.01% |
+1,600
| New | +$31.5K |
|
|
PKST
6246
PUT
DELISTED
Peakstone Realty Trust
PKST
| $30K | ﹤0.01% |
2,400
+100
| +4% | +$1.13K |
|
6247
PUT
QuickLogic
QUIK
$211M
| $30K | ﹤0.01% |
6,000
+3,900
| +186% | +$29.3K |
|
6248
Radiant Logistics
RLGT
$400M
| $30K | ﹤0.01% |
4,970
+4,909
| +8,048% | +$33.2K |
|
6249
CALL
RLX Technology
RLX
$2.37B
| $30K | ﹤0.01% |
16,000
-361,500
| -96% | -$802K |
|
6250
CALL
Solid Power
SLDP
$450M
| $30K | ﹤0.01% |
28,700
-29,000
| -50% | -$39.7K |
|
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.