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 | |
|---|---|---|---|---|---|---|
3551
Modine Manufacturing
MOD
$11.2B
| $429K | ﹤0.01% |
5,599
+4,702
| +524% | +$463K |
|
3552
PUT
IAMGOLD
IAG
$8.24B
| $428K | ﹤0.01% |
68,500
-29,600
| -30% | -$175K |
|
3553
PUT
Royal Bank of Canada
RY
$294B
| $428K | ﹤0.01% |
3,800
-500
| -12% | -$58.9K |
|
3554
iShares MSCI Turkey ETF
TUR
$204M
| $427K | ﹤0.01% |
13,029
+10,440
| +403% | +$370K |
|
3555
PUT
Frontier Group Holdings
ULCC
$1.42B
| $426K | ﹤0.01% |
98,300
+94,000
| +2,186% | +$700K |
|
3556
NCR Voyix
VYX
$1.18B
| $426K | ﹤0.01% |
+43,754
| New | +$514K |
|
3557
CALL
AGCO
AGCO
$8.93B
| $425K | ﹤0.01% |
4,600
+2,600
| +130% | +$254K |
|
3558
CALL
BlackSky Technology
BKSY
$895M
| $425K | ﹤0.01% |
55,100
-125,300
| -69% | -$1.57M |
|
3559
Cipher Digital
CIFR
$8.2B
| $425K | ﹤0.01% |
185,015
+86,507
| +88% | +$394K |
|
3560
GraniteShares 2x Long COIN Daily ETF
CONL
$519M
| $425K | ﹤0.01% |
30,685
-10,949
| -26% | -$352K |
|
3561
CALL
Leonardo DRS
DRS
$12.9B
| $424K | ﹤0.01% |
12,900
-3,600
| -22% | -$119K |
|
3562
CALL
Methode Electronics
MEI
$514M
| $424K | ﹤0.01% |
66,500
+65,400
| +5,945% | +$645K |
|
3563
PUT
News Corp Class B
NWS
$17.3B
| $424K | ﹤0.01% |
+15,600
| New | +$494K |
|
3564
PUT
Forward Air
FWRD
$471M
| $423K | ﹤0.01% |
21,100
-28,200
| -57% | -$778K |
|
|
FYBR
3565
CALL
DELISTED
Frontier Communications
FYBR
| $423K | ﹤0.01% |
11,800
-7,600
| -39% | -$271K |
|
3566
PUT
Otis Worldwide
OTIS
$28.2B
| $423K | ﹤0.01% |
4,100
-5,700
| -58% | -$557K |
|
3567
Turning Point Brands
TPB
$1.55B
| $423K | ﹤0.01% |
7,117
-1,146
| -14% | -$70.9K |
|
3568
CALL
USA Compression Partners
USAC
$3.74B
| $423K | ﹤0.01% |
15,700
-17,600
| -53% | -$466K |
|
|
ITCI
3569
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $423K | ﹤0.01% |
3,214
-5,546
| -63% | -$691K |
|
3570
PUT
Churchill Downs
CHDN
$6.22B
| $422K | ﹤0.01% |
+3,800
| New | +$454K |
|
3571
Enviri
NVRI
$621M
| $422K | ﹤0.01% |
63,593
+52,549
| +476% | +$413K |
|
3572
CALL
Digital Turbine
APPS
$1.03B
| $421K | ﹤0.01% |
155,200
+28,900
| +23% | +$93.8K |
|
3573
PUT
Dover
DOV
$27.3B
| $421K | ﹤0.01% |
2,400
+1,000
| +71% | +$192K |
|
3574
CALL
Eagle Materials
EXP
$6.8B
| $421K | ﹤0.01% |
1,900
-1,700
| -47% | -$403K |
|
3575
PUT
Mattel
MAT
$4.48B
| $421K | ﹤0.01% |
21,700
+7,900
| +57% | +$157K |
|
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.