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 | |
|---|---|---|---|---|---|---|
6426
NovaGold Resources
NG
$2.54B
| $24K | ﹤0.01% |
8,555
-547
| -6% | -$1.76K |
|
6427
Navigator Holdings
NVGS
$1.35B
| $24K | ﹤0.01% |
1,863
+490
| +36% | +$7.61K |
|
|
ACH
6428
PUT
Accendra Health
ACH
$254M
| $24K | ﹤0.01% |
2,700
+700
| +35% | +$7.39K |
|
6429
CALL
Outlook Therapeutics
OTLK
$187M
| $24K | ﹤0.01% |
20,100
-159,400
| -89% | -$279K |
|
6430
PUT
Prime Medicine
PRME
$547M
| $24K | ﹤0.01% |
12,300
-3,800
| -24% | -$9.69K |
|
6431
CALL
QuickLogic
QUIK
$211M
| $24K | ﹤0.01% |
4,800
-4,000
| -45% | -$30K |
|
6432
CALL
Simmons First National
SFNC
$3.39B
| $24K | ﹤0.01% |
1,200
-13,000
| -92% | -$282K |
|
|
SVC
6433
CALL
Service Properties Trust
SVC
$1.05B
| $24K | ﹤0.01% |
+1,900
| New | +$25.7K |
|
6434
SunCoke Energy
SXC
$794M
| $24K | ﹤0.01% |
+2,674
| New | +$25.7K |
|
6435
PUT
Triple Flag Precious Metals
TFPM
$5.93B
| $24K | ﹤0.01% |
1,300
+900
| +225% | +$15.4K |
|
6436
PUT
Turkcell
TKC
$4.7B
| $24K | ﹤0.01% |
+4,000
| New | +$28.2K |
|
|
TMQ
6437
Trilogy Metals
TMQ
$504M
| $24K | ﹤0.01% |
15,985
+13,316
| +499% | +$18.4K |
|
6438
PUT
Ternium
TX
$9.43B
| $24K | ﹤0.01% |
800
-3,400
| -81% | -$103K |
|
6439
Worthington Steel
WS
$1.78B
| $24K | ﹤0.01% |
974
+272
| +39% | +$7.67K |
|
|
YRD
6440
PUT
Yiren Digital
YRD
$93.6M
| $24K | ﹤0.01% |
3,500
-7,300
| -68% | -$45.9K |
|
6441
CALL
BBB Foods
TBBB
$4.76B
| $24K | ﹤0.01% |
900
-1,200
| -57% | -$33.4K |
|
|
PRSU
6442
PUT
Pursuit Attractions and Hospitality Inc
PRSU
$1.45B
| $24K | ﹤0.01% |
+700
| New | +$27.3K |
|
|
SAIL
6443
PUT
SailPoint Inc
SAIL
$9.01B
| $24K | ﹤0.01% |
+1,300
| New | +$28.3K |
|
|
PDCO
6444
PUT
DELISTED
Patterson Companies, Inc.
PDCO
| $24K | ﹤0.01% |
800
-5,600
| -88% | -$174K |
|
|
ACB
6445
Aurora Cannabis
ACB
$169M
| $23K | ﹤0.01% |
+5,371
| New | +$25.4K |
|
6446
CALL
Anixa Biosciences
ANIX
$118M
| $23K | ﹤0.01% |
8,300
+2,300
| +38% | +$6.58K |
|
6447
AZZ Inc
AZZ
$4.24B
| $23K | ﹤0.01% |
+287
| New | +$25.6K |
|
6448
PUT
Bloomin' Brands
BLMN
$754M
| $23K | ﹤0.01% |
3,300
-40,300
| -92% | -$427K |
|
6449
CALL
Barnes & Noble Education
BNED
$435M
| $23K | ﹤0.01% |
2,200
-23,600
| -91% | -$244K |
|
6450
ProShares Ultra Bloomberg Natural Gas
BOIL
$334M
| $23K | ﹤0.01% |
+135
| New | +$20.3K |
|
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.