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 | |
|---|---|---|---|---|---|---|
1576
CALL
QuantumScape Corp
QS
$3B
| $3.35M | ﹤0.01% |
805,300
-875,000
| -52% | -$4.33M |
|
1577
CALL
Raymond James Financial
RJF
$32.5B
| $3.35M | ﹤0.01% |
24,100
-36,300
| -60% | -$5.63M |
|
1578
NextDecade
NEXT
$1.85B
| $3.34M | ﹤0.01% |
429,322
+33,685
| +9% | +$272K |
|
1579
Zoetis
ZTS
$31.6B
| $3.33M | ﹤0.01% |
20,229
+7,872
| +64% | +$1.31M |
|
1580
CALL
WEC Energy
WEC
$37.7B
| $3.32M | ﹤0.01% |
30,500
+13,300
| +77% | +$1.36M |
|
1581
PUT
Becton Dickinson
BDX
$43.1B
| $3.32M | ﹤0.01% |
14,500
-20,800
| -59% | -$4.83M |
|
1582
PUT
Fair Isaac
FICO
$28.7B
| $3.32M | ﹤0.01% |
1,800
-2,500
| -58% | -$4.63M |
|
1583
PUT
Leidos
LDOS
$14.1B
| $3.32M | ﹤0.01% |
24,600
+9,200
| +60% | +$1.28M |
|
|
JPGE
1584
CALL
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $3.31M | ﹤0.01% |
58,000
+13,400
| +30% | +$765K |
|
1585
CALL
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$542M
| $3.31M | ﹤0.01% |
66,400
+61,900
| +1,376% | +$3.48M |
|
1586
CALL
Symbotic
SYM
$5.11B
| $3.29M | ﹤0.01% |
163,000
-4,500
| -3% | -$115K |
|
1587
CALL
J.M. Smucker
SJM
$12.6B
| $3.29M | ﹤0.01% |
27,800
-41,700
| -60% | -$4.5M |
|
|
BECN
1588
PUT
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $3.29M | ﹤0.01% |
26,600
+21,600
| +432% | +$2.52M |
|
1589
PUT
Procore
PCOR
$6.46B
| $3.28M | ﹤0.01% |
49,700
-42,400
| -46% | -$3.2M |
|
1590
CALL
Ginkgo Bioworks
DNA
$481M
| $3.28M | ﹤0.01% |
575,500
-356,500
| -38% | -$3.63M |
|
1591
CALL
Alliance Resource Partners
ARLP
$3.18B
| $3.28M | ﹤0.01% |
120,200
+31,700
| +36% | +$847K |
|
1592
PUT
Jefferies Financial Group
JEF
$12.9B
| $3.28M | ﹤0.01% |
61,200
+35,000
| +134% | +$2.38M |
|
1593
PUT
Celanese
CE
$5.09B
| $3.27M | ﹤0.01% |
57,600
-6,800
| -11% | -$425K |
|
|
XIFR
1594
CALL
XPLR Infrastructure LP
XIFR
$1.18B
| $3.27M | ﹤0.01% |
344,100
+168,400
| +96% | +$1.91M |
|
1595
CALL
New Fortress Energy
NFE
$101M
| $3.27M | ﹤0.01% |
393,000
-43,000
| -10% | -$530K |
|
1596
CALL
Texas Roadhouse
TXRH
$12.7B
| $3.25M | ﹤0.01% |
19,500
+11,400
| +141% | +$2.02M |
|
1597
PUT
Sable Offshore Corp
SOC
$903M
| $3.25M | ﹤0.01% |
128,100
-36,400
| -22% | -$932K |
|
1598
PUT
Cracker Barrel
CBRL
$1.2B
| $3.25M | ﹤0.01% |
83,600
+42,700
| +104% | +$2.15M |
|
|
1599
PUT
Raymond James Financial
RJF
$32.5B
| $3.24M | ﹤0.01% |
23,300
+5,100
| +28% | +$792K |
|
1600
CALL
Advance Auto Parts
AAP
$3.37B
| $3.22M | ﹤0.01% |
82,200
-94,500
| -53% | -$4.05M |
|
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.