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 | |
|---|---|---|---|---|---|---|
976
CALL
Cinemark Holdings
CNK
$3.82B
| $8.46M | 0.01% |
339,800
-41,600
| -11% | -$1.16M |
|
977
PUT
Lithia Motors
LAD
$7.62B
| $8.45M | 0.01% |
28,800
+27,300
| +1,820% | +$9.3M |
|
|
978
Strategy Inc
MSTR
$34.2B
| $8.45M | 0.01% |
29,313
-255,709
| -90% | -$81.2M |
|
979
CALL
Motorola Solutions
MSI
$67.6B
| $8.45M | 0.01% |
19,300
-24,500
| -56% | -$10.9M |
|
980
CALL
Welltower
WELL
$174B
| $8.44M | 0.01% |
55,100
-68,000
| -55% | -$9.69M |
|
981
PUT
HP
HPQ
$22.4B
| $8.43M | 0.01% |
304,600
-35,400
| -10% | -$1.12M |
|
982
Albemarle
ALB
$13.8B
| $8.43M | 0.01% |
117,090
-8,985
| -7% | -$731K |
|
983
PUT
UiPath
PATH
$5.28B
| $8.43M | 0.01% |
818,700
-425,000
| -34% | -$5.47M |
|
984
PUT
Lucid Motors
LCID
$2.52B
| $8.43M | 0.01% |
348,280
-18,590
| -5% | -$497K |
|
985
PUT
CarMax
KMX
$8.29B
| $8.42M | 0.01% |
108,100
-33,300
| -24% | -$2.67M |
|
|
CTRA
986
CALL
DELISTED
Coterra Energy
CTRA
| $8.39M | 0.01% |
290,500
-86,900
| -23% | -$2.42M |
|
987
CALL
Match Group
MTCH
$8.72B
| $8.39M | 0.01% |
269,100
-591,100
| -69% | -$19.3M |
|
988
CALL
Synchrony
SYF
$23.3B
| $8.38M | 0.01% |
158,400
-93,900
| -37% | -$5.81M |
|
989
CALL
Sysco
SYY
$39.1B
| $8.38M | 0.01% |
111,700
-101,300
| -48% | -$7.43M |
|
990
CALL
Return Stacked Bonds & Managed Futures ETF
RSBT
$137M
| $8.37M | 0.01% |
416,600
+18,900
| +5% | +$322K |
|
991
PUT
Capri Holdings
CPRI
$1.78B
| $8.36M | 0.01% |
423,600
+232,100
| +121% | +$5.14M |
|
992
CALL
Texas Pacific Land
TPL
$29.4B
| $8.35M | 0.01% |
18,900
-300
| -2% | -$134K |
|
993
CALL
TripAdvisor
TRIP
$1.57B
| $8.3M | 0.01% |
586,000
+281,500
| +92% | +$4.41M |
|
994
CALL
Southern Copper
SCCO
$143B
| $8.3M | 0.01% |
93,053
+38,482
| +71% | +$3.46M |
|
995
CALL
Best Buy
BBY
$17.8B
| $8.29M | 0.01% |
112,700
-69,000
| -38% | -$5.69M |
|
996
CALL
monday.com
MNDY
$3.03B
| $8.27M | 0.01% |
34,000
-4,300
| -11% | -$1.14M |
|
997
PUT
Antero Resources
AR
$10.9B
| $8.25M | 0.01% |
204,100
-201,400
| -50% | -$7.72M |
|
998
Boston Scientific
BSX
$64.8B
| $8.24M | 0.01% |
+81,674
| New | +$8.22M |
|
999
iShares National Muni Bond ETF
MUB
$45B
| $8.22M | 0.01% |
77,947
-18,707
| -19% | -$1.99M |
|
1000
PUT
Advance Auto Parts
AAP
$3.22B
| $8.19M | 0.01% |
209,000
-57,200
| -21% | -$2.45M |
|
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.