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 | |
|---|---|---|---|---|---|---|
4376
PUT
Inspire Medical Systems
INSP
$1.47B
| $191K | ﹤0.01% |
1,200
-9,900
| -89% | -$1.79M |
|
4377
PUT
McEwen Inc
MUX
$1B
| $191K | ﹤0.01% |
25,400
-29,500
| -54% | -$230K |
|
4378
PUT
Boston Beer
SAM
$1.95B
| $191K | ﹤0.01% |
800
+200
| +33% | +$48.7K |
|
|
TRVG
4379
CALL
trivago
TRVG
$385M
| $191K | ﹤0.01% |
46,800
+46,100
| +6,586% | +$170K |
|
4380
PUT
InfraCap MLP ETF
AMZA
$466M
| $190K | ﹤0.01% |
9,000
+3,400
| +61% | +$160K |
|
4381
PUT
Customers Bancorp
CUBI
$2.66B
| $190K | ﹤0.01% |
3,800
-4,900
| -56% | -$257K |
|
4382
CALL
Curtiss-Wright
CW
$25.1B
| $190K | ﹤0.01% |
600
-1,000
| -63% | -$337K |
|
|
HIVE
4383
HIVE Digital Technologies
HIVE
$679M
| $190K | ﹤0.01% |
131,141
+72,552
| +124% | +$179K |
|
4384
ING
ING
$92.9B
| $190K | ﹤0.01% |
9,703
+6,182
| +176% | +$110K |
|
4385
PUT
National Fuel Gas
NFG
$7.69B
| $190K | ﹤0.01% |
2,400
+1,100
| +85% | +$79.1K |
|
4386
PUT
abrdn Physical Palladium Shares ETF
PALL
$609M
| $190K | ﹤0.01% |
+10,500
| New | +$185K |
|
4387
PUT
Impinj
PI
$4.24B
| $190K | ﹤0.01% |
2,100
-2,400
| -53% | -$269K |
|
4388
PUT
POET Technologies
POET
$1.1B
| $190K | ﹤0.01% |
50,500
-5,100
| -9% | -$23.2K |
|
4389
CALL
Ring Energy
REI
$307M
| $190K | ﹤0.01% |
165,300
-89,100
| -35% | -$116K |
|
4390
CALL
Talkspace
TALK
$874M
| $190K | ﹤0.01% |
74,300
-34,900
| -32% | -$109K |
|
|
TGI
4391
CALL
DELISTED
Triumph Group
TGI
| $190K | ﹤0.01% |
7,500
+5,900
| +369% | +$137K |
|
4392
CALL
10x Genomics
TXG
$5.88B
| $190K | ﹤0.01% |
21,800
+17,800
| +445% | +$224K |
|
4393
WisdomTree
WT
$2.79B
| $190K | ﹤0.01% |
+21,318
| New | +$199K |
|
|
AHRT
4394
AH Realty Trust
AHRT
$536M
| $189K | ﹤0.01% |
25,180
+24,929
| +9,932% | +$226K |
|
|
BZUN
4395
CALL
Baozun
BZUN
$179M
| $189K | ﹤0.01% |
69,300
+24,300
| +54% | +$77.1K |
|
4396
Chemours
CC
$2.48B
| $189K | ﹤0.01% |
14,009
-12,676
| -48% | -$211K |
|
4397
CALL
Compass Minerals
CMP
$1.23B
| $189K | ﹤0.01% |
20,400
-18,100
| -47% | -$207K |
|
4398
CALL
Phreesia
PHR
$689M
| $189K | ﹤0.01% |
7,400
-500
| -6% | -$13.6K |
|
|
4399
POET Technologies
POET
$1.1B
| $189K | ﹤0.01% |
50,048
+333
| +0.7% | +$1.52K |
|
4400
ProShares UltraShort Financials
SKF
$10.3M
| $189K | ﹤0.01% |
5,804
+2,258
| +64% | +$74.1K |
|
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.