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 | |
|---|---|---|---|---|---|---|
2776
Interactive Brokers
IBKR
$40.9B
| $921K | ﹤0.01% |
+22,264
| New | +$1.1M |
|
2777
CALL
TransUnion
TRU
$14.8B
| $921K | ﹤0.01% |
11,100
+5,000
| +82% | +$457K |
|
2778
CALL
Black Stone Minerals
BSM
$3.11B
| $920K | ﹤0.01% |
60,300
+42,400
| +237% | +$637K |
|
2779
Bilibili
BILI
$7.18B
| $919K | ﹤0.01% |
48,093
-951,856
| -95% | -$18.3M |
|
2780
PUT
Dine Brands
DIN
$432M
| $919K | ﹤0.01% |
39,500
+30,200
| +325% | +$814K |
|
|
GOGL
2781
DELISTED
Golden Ocean Group
GOGL
| $918K | ﹤0.01% |
115,076
+36,276
| +46% | +$322K |
|
2782
CALL
NextDecade
NEXT
$1.85B
| $918K | ﹤0.01% |
118,100
-78,900
| -40% | -$636K |
|
2783
CALL
Hudbay
HBM
$9.92B
| $917K | ﹤0.01% |
120,900
+38,500
| +47% | +$314K |
|
2784
CALL
Manhattan Associates
MANH
$8.97B
| $917K | ﹤0.01% |
5,300
+1,500
| +39% | +$312K |
|
2785
CALL
Hartford Financial Services
HIG
$38.5B
| $915K | ﹤0.01% |
7,400
-13,000
| -64% | -$1.49M |
|
|
SUPV
2786
PUT
Grupo Supervielle
SUPV
$833M
| $914K | ﹤0.01% |
70,000
+21,400
| +44% | +$326K |
|
|
CRON
2787
PUT
Cronos Group
CRON
$1.05B
| $912K | ﹤0.01% |
504,000
+120,200
| +31% | +$232K |
|
2788
Mettler-Toledo International
MTD
$26.8B
| $912K | ﹤0.01% |
773
+762
| +6,927% | +$973K |
|
|
BPMC
2789
CALL
DELISTED
Blueprint Medicines
BPMC
| $911K | ﹤0.01% |
10,300
-15,900
| -61% | -$1.55M |
|
2790
CALL
Verra Mobility
VRRM
$615M
| $911K | ﹤0.01% |
+40,500
| New | +$975K |
|
|
BTFX
2791
PUT
DELISTED
Valkyrie ETF Trust II CoinShares Bitcoin Leverage ETF
BTFX
| $910K | ﹤0.01% |
+71,400
| New | +$3.39M |
|
2792
CALL
Trevi Therapeutics
TRVI
$2.49B
| $909K | ﹤0.01% |
144,600
+143,900
| +20,557% | +$686K |
|
2793
PUT
DHT Holdings
DHT
$2.97B
| $908K | ﹤0.01% |
86,500
-120,200
| -58% | -$1.29M |
|
2794
GitLab
GTLB
$5.28B
| $908K | ﹤0.01% |
+19,336
| New | +$1.18M |
|
2795
CALL
Martin Marietta Materials
MLM
$33.6B
| $908K | ﹤0.01% |
1,900
+900
| +90% | +$457K |
|
2796
PUT
Cipher Digital
CIFR
$9.47B
| $905K | ﹤0.01% |
393,500
+221,500
| +129% | +$1.01M |
|
|
DNB
2797
DELISTED
Dun & Bradstreet
DNB
| $902K | ﹤0.01% |
+100,911
| New | +$1.03M |
|
2798
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $902K | ﹤0.01% |
6,100
-26,200
| -81% | -$4.31M |
|
2799
Harrow
HROW
$1.43B
| $898K | ﹤0.01% |
+33,780
| New | +$1.01M |
|
2800
Boston Properties
BXP
$11B
| $897K | ﹤0.01% |
13,354
-705
| -5% | -$49.4K |
|
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.