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 | |
|---|---|---|---|---|---|---|
|
IMVP
7576
Invesco India ETF
IMVP
$122M
| $5K | ﹤0.01% |
+201
| New | +$4.94K |
|
7577
Invesco Global Water ETF
PIO
$269M
| $5K | ﹤0.01% |
+140
| New | +$5.67K |
|
7578
CALL
Purple Innovation
PRPL
$33.2M
| $5K | ﹤0.01% |
316
+60
| +23% | +$1.38K |
|
7579
ProQR Therapeutics
PRQR
$243M
| $5K | ﹤0.01% |
4,108
-5,801
| -59% | -$12.3K |
|
|
PTN
7580
Palatin Technologies
PTN
$13.7M
| $5K | ﹤0.01% |
189
+185
| +4,625% | +$8.62K |
|
|
BCIC
7581
BCP Investment Corp
BCIC
$86.9M
| $5K | ﹤0.01% |
+403
| New | +$6.65K |
|
7582
CALL
Quanterix
QTRX
$173M
| $5K | ﹤0.01% |
900
-2,700
| -75% | -$22.5K |
|
7583
CALL
Quad
QUAD
$430M
| $5K | ﹤0.01% |
1,000
-2,500
| -71% | -$15.9K |
|
7584
PUT
LiveRamp
RAMP
$2.29B
| $5K | ﹤0.01% |
200
+100
| +100% | +$3.06K |
|
7585
PUT
Richardson Electronics
RELL
$261M
| $5K | ﹤0.01% |
+500
| New | +$6.49K |
|
7586
Schwab US Mid-Cap ETF
SCHM
$14.6B
| $5K | ﹤0.01% |
214
-256
| -54% | -$7.13K |
|
7587
CALL
Stepan Co
SCL
$1.31B
| $5K | ﹤0.01% |
+100
| New | +$6.1K |
|
|
BNKK
7588
CALL
Bonk Inc
BNKK
$8.96M
| $5K | ﹤0.01% |
426
+309
| +264% | +$5.52K |
|
|
SHYF
7589
DELISTED
The Shyft Group
SHYF
| $5K | ﹤0.01% |
+663
| New | +$7.12K |
|
7590
CALL
Skyward Specialty Insurance
SKWD
$2.45B
| $5K | ﹤0.01% |
100
-100
| -50% | -$4.82K |
|
7591
CALL
Sun Life Financial
SLF
$45.6B
| $5K | ﹤0.01% |
+100
| New | +$5.7K |
|
|
7592
PUT
Sun Life Financial
SLF
$45.6B
| $5K | ﹤0.01% |
+100
| New | +$5.7K |
|
7593
CALL
Smith Micro Software
SMSI
$14M
| $5K | ﹤0.01% |
1,480
+1,000
| +208% | +$6.01K |
|
7594
PUT
Smart Sand
SND
$200M
| $5K | ﹤0.01% |
+2,000
| New | +$4.7K |
|
7595
Smith & Nephew
SNN
$12.9B
| $5K | ﹤0.01% |
+198
| New | +$5.29K |
|
|
SOL
7596
CALL
DELISTED
Emeren Group
SOL
| $5K | ﹤0.01% |
3,400
-14,600
| -81% | -$25.5K |
|
7597
SPX Corp
SPXC
$11B
| $5K | ﹤0.01% |
41
-296
| -88% | -$42.4K |
|
7598
CALL
Sensus Healthcare
SRTS
$49.9M
| $5K | ﹤0.01% |
1,200
+400
| +50% | +$2.33K |
|
7599
CALL
StepStone Group
STEP
$3.48B
| $5K | ﹤0.01% |
100
-1,000
| -91% | -$58.8K |
|
7600
Supernus Pharmaceuticals
SUPN
$2.68B
| $5K | ﹤0.01% |
177
+27
| +18% | +$957 |
|
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.