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 | |
|---|---|---|---|---|---|---|
1626
CALL
HSBC
HSBC
$355B
| $3.11M | ﹤0.01% |
54,200
-224,500
| -81% | -$12.3M |
|
1627
CALL
Kimbell Royalty Partners
KRP
$1.47B
| $3.11M | ﹤0.01% |
222,200
+44,100
| +25% | +$666K |
|
1628
Thermo Fisher Scientific
TMO
$211B
| $3.11M | ﹤0.01% |
6,244
+4,691
| +302% | +$2.54M |
|
1629
MSCI
MSCI
$40B
| $3.1M | ﹤0.01% |
+5,490
| New | +$3.19M |
|
|
CTRA
1630
PUT
DELISTED
Coterra Energy
CTRA
| $3.1M | ﹤0.01% |
107,400
+2,800
| +3% | +$78.1K |
|
1631
PUT
Freshpet
FRPT
$2.83B
| $3.1M | ﹤0.01% |
37,300
-9,600
| -20% | -$1.17M |
|
1632
PUT
Imperial Oil
IMO
$62.1B
| $3.1M | ﹤0.01% |
+42,900
| New | +$2.95M |
|
1633
PUT
Hasbro
HAS
$12.6B
| $3.1M | ﹤0.01% |
50,400
-27,000
| -35% | -$1.63M |
|
1634
CALL
Western Alliance Bancorporation
WAL
$9.07B
| $3.1M | ﹤0.01% |
40,300
-29,900
| -43% | -$2.51M |
|
1635
State Street Utilities Select Sector SPDR ETF
XLU
$24.1B
| $3.1M | ﹤0.01% |
78,554
-231,388
| -75% | -$9.04M |
|
1636
CALL
Root
ROOT
$917M
| $3.1M | ﹤0.01% |
23,200
-10,600
| -31% | -$1.21M |
|
1637
CALL
Plug Power
PLUG
$2.92B
| $3.09M | ﹤0.01% |
2,290,800
+312,400
| +16% | +$594K |
|
1638
PUT
Campbell Soup
CPB
$6.51B
| $3.09M | ﹤0.01% |
77,400
+30,300
| +64% | +$1.19M |
|
1639
CALL
Conagra Brands
CAG
$7.07B
| $3.08M | ﹤0.01% |
115,600
+22,700
| +24% | +$586K |
|
|
CHGX
1640
PUT
DELISTED
AXS Change Finance ESG ETF
CHGX
| $3.08M | ﹤0.01% |
77,400
-92,400
| -54% | -$3.55M |
|
1641
PUT
Ares Capital
ARCC
$13.5B
| $3.07M | ﹤0.01% |
138,700
+66,200
| +91% | +$1.5M |
|
|
1642
PUT
Root
ROOT
$917M
| $3.07M | ﹤0.01% |
23,000
-41,500
| -64% | -$4.75M |
|
1643
CALL
Kyndryl
KD
$2.66B
| $3.07M | ﹤0.01% |
97,700
-156,900
| -62% | -$5.88M |
|
1644
CALL
dLocal
DLO
$4.26B
| $3.06M | ﹤0.01% |
367,300
-87,900
| -19% | -$990K |
|
1645
PUT
Weibo
WB
$1.9B
| $3.06M | ﹤0.01% |
323,300
+161,300
| +100% | +$1.64M |
|
1646
CALL
Tencent Music
TME
$14.5B
| $3.06M | ﹤0.01% |
212,300
-118,900
| -36% | -$1.48M |
|
1647
PUT
Veeva Systems
VEEV
$30.3B
| $3.06M | ﹤0.01% |
13,200
-25,700
| -66% | -$5.87M |
|
1648
CALL
Quantum Computing Inc
QUBT
$1.68B
| $3.05M | ﹤0.01% |
381,500
-62,800
| -14% | -$552K |
|
1649
CALL
Uranium Energy
UEC
$4.71B
| $3.05M | ﹤0.01% |
638,500
-141,200
| -18% | -$886K |
|
|
QLTB
1650
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $3.05M | ﹤0.01% |
15,100
-20,100
| -57% | -$4.06M |
|
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.