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 | |
|---|---|---|---|---|---|---|
351
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$108M
| $35.6M | 0.02% |
1,339,600
+862,700
| +181% | +$22M |
|
352
CALL
Waste Management
WM
$94.9B
| $35.4M | 0.02% |
152,800
+116,800
| +324% | +$25.9M |
|
|
EXE
353
CALL
Expand Energy Corp
EXE
$22.3B
| $35.1M | 0.02% |
315,500
-78,700
| -20% | -$8.19M |
|
354
CALL
Deere & Co
DE
$164B
| $34.9M | 0.02% |
74,300
-32,300
| -30% | -$15.1M |
|
355
CALL
Moderna
MRNA
$23B
| $34.8M | 0.02% |
1,226,800
+339,900
| +38% | +$12.1M |
|
356
PUT
NextEra Energy
NEE
$186B
| $34.6M | 0.02% |
488,500
-323,200
| -40% | -$22.8M |
|
357
PUT
Celsius Holdings
CELH
$7.28B
| $34.5M | 0.02% |
967,500
-153,800
| -14% | -$4.19M |
|
358
PUT
Lowe's Companies
LOW
$115B
| $34.3M | 0.02% |
147,000
-34,600
| -19% | -$8.51M |
|
359
PUT
Marathon Digital Holdings
MARA
$4.73B
| $34.2M | 0.02% |
2,973,800
+213,200
| +8% | +$3.39M |
|
360
Nike
NKE
$62.6B
| $34.1M | 0.02% |
537,279
-53,645
| -9% | -$3.95M |
|
361
PUT
Vertiv
VRT
$116B
| $33.8M | 0.02% |
468,400
+77,100
| +20% | +$8.21M |
|
|
XYZ
362
PUT
Block Inc
XYZ
$46.1B
| $33.8M | 0.02% |
622,000
-494,900
| -44% | -$36.9M |
|
363
CALL
Royal Caribbean
RCL
$76.7B
| $33.7M | 0.02% |
164,200
+78,700
| +92% | +$18.6M |
|
364
PUT
RTX Corp
RTX
$262B
| $33.5M | 0.02% |
302,800
-240,700
| -44% | -$30.5M |
|
365
CALL
Take-Two Interactive
TTWO
$43.4B
| $33.5M | 0.02% |
161,500
+32,700
| +25% | +$6.53M |
|
|
SCHW
366
PUT
Charles Schwab
SCHW
$175B
| $33.4M | 0.02% |
427,300
-406,700
| -49% | -$31.9M |
|
367
PUT
GE Aerospace
GE
$354B
| $33.4M | 0.02% |
175,900
-218,900
| -55% | -$43.1M |
|
|
368
CALL
RTX Corp
RTX
$262B
| $33.3M | 0.02% |
251,600
-393,400
| -61% | -$49.9M |
|
369
CALL
Edison International
EIX
$30.9B
| $33.3M | 0.02% |
565,400
+560,000
| +10,370% | +$32.2M |
|
370
CALL
XPeng
XPEV
$12.3B
| $33.2M | 0.02% |
1,600,700
+274,400
| +21% | +$4.94M |
|
371
PUT
Intuit
INTU
$77.8B
| $33.2M | 0.02% |
54,000
+900
| +2% | +$540K |
|
372
CALL
Altria Group
MO
$121B
| $33.1M | 0.02% |
552,200
+180,300
| +48% | +$9.84M |
|
373
Netflix
NFLX
$285B
| $32.8M | 0.02% |
+351,440
| New | +$33.4M |
|
374
PUT
Ford
F
$57.5B
| $32.6M | 0.02% |
3,253,000
-437,300
| -12% | -$4.27M |
|
375
CALL
Nu Holdings
NU
$70.1B
| $32.5M | 0.02% |
3,176,500
-615,500
| -16% | -$7.27M |
|
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.