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 | |
|---|---|---|---|---|---|---|
|
JMIA
4826
PUT
Jumia Technologies
JMIA
$768M
| $125K | ﹤0.01% |
58,400
-36,600
| -39% | -$119K |
|
4827
PUT
Lazard
LAZ
$4.43B
| $125K | ﹤0.01% |
2,900
+1,700
| +142% | +$84.5K |
|
4828
PUT
La-Z-Boy
LZB
$1.67B
| $125K | ﹤0.01% |
3,200
-100
| -3% | -$4.34K |
|
4829
CALL
Nomad Foods
NOMD
$1.68B
| $125K | ﹤0.01% |
6,400
+1,800
| +39% | +$32.9K |
|
4830
PUT
ProPetro Holding
PUMP
$1.42B
| $125K | ﹤0.01% |
17,100
+900
| +6% | +$7.82K |
|
4831
CALL
Regency Centers
REG
$14.1B
| $125K | ﹤0.01% |
+1,700
| New | +$124K |
|
4832
CALL
Ryan Specialty Holdings
RYAN
$11B
| $125K | ﹤0.01% |
1,700
-3,500
| -67% | -$238K |
|
4833
W.W. Grainger
GWW
$62.2B
| $124K | ﹤0.01% |
126
-420
| -77% | -$434K |
|
4834
HP
HPQ
$28.6B
| $124K | ﹤0.01% |
+4,502
| New | +$142K |
|
4835
Immunic
IMUX
$226M
| $124K | ﹤0.01% |
11,425
-171
| -1% | -$1.85K |
|
4836
Invesco KBW Property & Casualty Insurance ETF
KBWP
$267M
| $124K | ﹤0.01% |
1,000
+752
| +303% | +$87.8K |
|
|
MTLS
4837
PUT
Materialise
MTLS
$397M
| $124K | ﹤0.01% |
25,300
+24,300
| +2,430% | +$167K |
|
4838
GraniteShares ETF Trust GraniteShares 2x Long NVDA Daily ETF
NVDL
$3.89B
| $124K | ﹤0.01% |
10,002
-669
| -6% | -$12.3K |
|
4839
CALL
Oceaneering
OII
$5.11B
| $124K | ﹤0.01% |
5,700
+1,200
| +27% | +$28.5K |
|
4840
Praxis Precision Medicines
PRAX
$10.3B
| $124K | ﹤0.01% |
3,298
-13,556
| -80% | -$847K |
|
|
ITCI
4841
CALL
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $124K | ﹤0.01% |
12,300
+10,200
| +486% | +$1.27M |
|
4842
Acacia Research
ACTG
$449M
| $123K | ﹤0.01% |
38,447
+38,135
| +12,223% | +$156K |
|
4843
Amprius Technologies
AMPX
$1.74B
| $123K | ﹤0.01% |
+46,103
| New | +$136K |
|
|
APLT
4844
CALL
DELISTED
Applied Therapeutics
APLT
| $123K | ﹤0.01% |
253,000
+120,600
| +91% | +$71K |
|
4845
CALL
Atlanta Braves Holdings Series B
BATRK
$3.41B
| $123K | ﹤0.01% |
3,000
+900
| +43% | +$35.1K |
|
4846
CALL
Brunswick
BC
$5.29B
| $123K | ﹤0.01% |
2,300
-4,900
| -68% | -$307K |
|
|
BZUN
4847
Baozun
BZUN
$168M
| $123K | ﹤0.01% |
45,135
+4,603
| +11% | +$14.6K |
|
4848
Dana Inc
DAN
$3.26B
| $123K | ﹤0.01% |
9,228
-59,426
| -87% | -$856K |
|
|
HEES
4849
CALL
DELISTED
H&E Equipment Services
HEES
| $123K | ﹤0.01% |
1,300
+1,200
| +1,200% | +$104K |
|
4850
CALL
HealthEquity
HQY
$8.83B
| $123K | ﹤0.01% |
1,400
-1,100
| -44% | -$113K |
|
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.