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 | |
|---|---|---|---|---|---|---|
1401
PUT
Unilever
UL
$131B
| $4.35M | ﹤0.01% |
64,889
-32,178
| -33% | -$2.08M |
|
1402
PUT
United States Natural Gas Fund
UNG
$480M
| $4.34M | ﹤0.01% |
201,000
-155,400
| -44% | -$3.07M |
|
1403
CALL
STMicroelectronics
STM
$47.1B
| $4.34M | ﹤0.01% |
197,700
-47,000
| -19% | -$1.15M |
|
1404
CALL
BlackBerry
BB
$4.96B
| $4.33M | ﹤0.01% |
1,149,800
-321,000
| -22% | -$1.46M |
|
|
PPL
1405
CALL
PPL Corp
PPL
$27.6B
| $4.33M | ﹤0.01% |
119,800
+58,700
| +96% | +$1.99M |
|
|
SLNO
1406
PUT
DELISTED
Soleno Therapeutics
SLNO
| $4.3M | ﹤0.01% |
60,200
+15,100
| +33% | +$735K |
|
1407
CALL
Powell Industries
POWL
$8.33B
| $4.29M | ﹤0.01% |
75,600
+41,700
| +123% | +$2.91M |
|
1408
Cleveland-Cliffs
CLF
$6.31B
| $4.29M | ﹤0.01% |
521,623
+302,677
| +138% | +$3.08M |
|
1409
CALL
VICI Properties
VICI
$29.5B
| $4.29M | ﹤0.01% |
131,400
+6,700
| +5% | +$206K |
|
1410
CALL
Zeta Global
ZETA
$4.76B
| $4.27M | ﹤0.01% |
315,200
-69,200
| -18% | -$1.24M |
|
1411
CALL
Brighthouse Financial
BHF
$3.62B
| $4.27M | ﹤0.01% |
73,600
+71,900
| +4,229% | +$4.02M |
|
1412
Vanguard FTSE Developed Markets ETF
VEA
$226B
| $4.27M | ﹤0.01% |
+83,955
| New | +$4.25M |
|
1413
PUT
Kyndryl
KD
$2.64B
| $4.24M | ﹤0.01% |
135,100
+36,800
| +37% | +$1.38M |
|
1414
PUT
Groupon
GRPN
$966M
| $4.24M | ﹤0.01% |
225,700
+4,200
| +2% | +$53.2K |
|
1415
Kenvue
KVUE
$36.7B
| $4.23M | ﹤0.01% |
+176,588
| New | +$3.91M |
|
|
FITB
1416
PUT
Fifth Third Bancorp
FITB
$51.8B
| $4.22M | ﹤0.01% |
107,800
-271,000
| -72% | -$11.4M |
|
1417
CALL
OppFi
OPFI
$762M
| $4.21M | ﹤0.01% |
452,600
+375,100
| +484% | +$4.18M |
|
1418
PUT
FuboTV Inc
FUBO
$249M
| $4.2M | ﹤0.01% |
119,908
+65,525
| +120% | +$2.85M |
|
1419
Sable Offshore Corp
SOC
$863M
| $4.2M | ﹤0.01% |
165,559
+61,891
| +60% | +$1.58M |
|
1420
PUT
Baxter International
BAX
$11.6B
| $4.19M | ﹤0.01% |
122,500
-2,900
| -2% | -$94.8K |
|
1421
PUT
Oxford Industries
OXM
$565M
| $4.19M | ﹤0.01% |
+71,400
| New | +$5.13M |
|
|
PRMB
1422
CALL
Primo Brands
PRMB
$8.21B
| $4.19M | ﹤0.01% |
118,000
+65,100
| +123% | +$2.13M |
|
1423
CALL
Procore
PCOR
$6.36B
| $4.18M | ﹤0.01% |
63,300
-28,400
| -31% | -$2.14M |
|
1424
CALL
Regions Financial
RF
$26.2B
| $4.17M | ﹤0.01% |
192,000
-111,100
| -37% | -$2.59M |
|
1425
PUT
Return Stacked Bonds & Managed Futures ETF
RSBT
$136M
| $4.17M | ﹤0.01% |
223,500
-920,600
| -80% | -$15.7M |
|
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.