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 | |
|---|---|---|---|---|---|---|
1301
PUT
Synchrony
SYF
$23.3B
| $5.02M | ﹤0.01% |
94,800
-219,200
| -70% | -$13.6M |
|
1302
CALL
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $5.01M | ﹤0.01% |
96,800
+28,300
| +41% | +$1.34M |
|
1303
PUT
TripAdvisor
TRIP
$1.57B
| $5M | ﹤0.01% |
353,200
-138,900
| -28% | -$2.18M |
|
1304
ARK 21Shares Bitcoin ETF
ARKB
$2.47B
| $5M | ﹤0.01% |
182,520
+624
| +0.3% | +$19.3K |
|
1305
Whirlpool
WHR
$2.31B
| $4.99M | ﹤0.01% |
55,312
+15,136
| +38% | +$1.61M |
|
1306
Restaurant Brands International
QSR
$25.1B
| $4.98M | ﹤0.01% |
74,760
+7,513
| +11% | +$484K |
|
1307
PUT
Darling Ingredients
DAR
$10.1B
| $4.98M | ﹤0.01% |
159,300
+33,100
| +26% | +$1.16M |
|
1308
PUT
ACM Research
ACMR
$6.11B
| $4.97M | ﹤0.01% |
212,800
-61,000
| -22% | -$1.39M |
|
1309
CALL
Illinois Tool Works
ITW
$79.7B
| $4.96M | ﹤0.01% |
20,000
+11,200
| +127% | +$2.88M |
|
1310
CALL
Align Technology
ALGN
$12B
| $4.96M | ﹤0.01% |
31,200
-1,000
| -3% | -$196K |
|
1311
CALL
BioNTech
BNTX
$23.3B
| $4.95M | ﹤0.01% |
54,400
-55,000
| -50% | -$6.16M |
|
1312
CALL
First Majestic Silver
AG
$8.12B
| $4.93M | ﹤0.01% |
737,000
-455,000
| -38% | -$2.71M |
|
1313
CALL
Summit Therapeutics
SMMT
$11.6B
| $4.93M | ﹤0.01% |
255,500
+36,700
| +17% | +$736K |
|
|
1314
PUT
BioNTech
BNTX
$23.3B
| $4.93M | ﹤0.01% |
54,100
-96,600
| -64% | -$10.8M |
|
|
CFLT
1315
PUT
DELISTED
Confluent
CFLT
| $4.92M | ﹤0.01% |
210,000
+75,800
| +56% | +$2.2M |
|
|
HUT
1316
CALL
Hut 8
HUT
$13.2B
| $4.9M | ﹤0.01% |
421,900
-347,600
| -45% | -$6.42M |
|
1317
PENN Entertainment
PENN
$2.71B
| $4.9M | ﹤0.01% |
300,558
-16,728
| -5% | -$327K |
|
1318
CALL
Warner Music
WMG
$13.9B
| $4.9M | ﹤0.01% |
156,300
+131,900
| +541% | +$4.28M |
|
1319
CALL
Macy's
M
$6.14B
| $4.9M | ﹤0.01% |
390,000
-188,900
| -33% | -$2.74M |
|
|
SWTX
1320
PUT
DELISTED
SpringWorks Therapeutics
SWTX
| $4.89M | ﹤0.01% |
110,800
+100,500
| +976% | +$4.63M |
|
1321
Fox Class A
FOXA
$23.1B
| $4.89M | ﹤0.01% |
86,365
+65,004
| +304% | +$3.44M |
|
1322
CALL
UBS Group
UBS
$169B
| $4.88M | ﹤0.01% |
159,500
-416,900
| -72% | -$13.9M |
|
1323
CALL
Sunrun
RUN
$2.48B
| $4.88M | ﹤0.01% |
833,300
-555,000
| -40% | -$4.57M |
|
1324
CALL
VF Corp
VFC
$6.49B
| $4.88M | ﹤0.01% |
314,500
-773,400
| -71% | -$17.1M |
|
1325
PUT
Nutrien
NTR
$32.9B
| $4.88M | ﹤0.01% |
98,200
-175,200
| -64% | -$8.96M |
|
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.