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 | |
|---|---|---|---|---|---|---|
301
CALL
AstraZeneca
AZN
$263B
| $44M | 0.03% |
299,000
+99,550
| +50% | +$14.4M |
|
|
B
302
CALL
Barrick Mining
B
$62.8B
| $43.9M | 0.03% |
2,259,900
-1,258,200
| -36% | -$22M |
|
303
CALL
NIO
NIO
$11.7B
| $43.8M | 0.03% |
11,488,400
+3,786,700
| +49% | +$16.7M |
|
304
PUT
Mercado Libre
MELI
$91.2B
| $43.5M | 0.03% |
22,300
-4,500
| -17% | -$8.93M |
|
305
CALL
Abbott
ABT
$175B
| $43.5M | 0.03% |
327,700
-90,100
| -22% | -$11.5M |
|
306
CALL
Agnico Eagle Mines
AEM
$73.5B
| $43.5M | 0.03% |
400,800
+164,200
| +69% | +$15.7M |
|
307
CALL
ConocoPhillips
COP
$145B
| $43.3M | 0.03% |
440,000
-71,500
| -14% | -$7.13M |
|
308
CALL
FedEx
FDX
$76.6B
| $43.2M | 0.03% |
177,300
-49,800
| -22% | -$12.9M |
|
309
CALL
Deckers Outdoor
DECK
$14.2B
| $42.7M | 0.03% |
382,100
+337,400
| +755% | +$54.5M |
|
310
CALL
Hims & Hers Health
HIMS
$7.33B
| $42.7M | 0.03% |
1,445,600
-69,700
| -5% | -$2.59M |
|
311
PUT
Roblox
RBLX
$35.5B
| $42.6M | 0.03% |
731,400
-91,400
| -11% | -$5.75M |
|
312
CALL
Celsius Holdings
CELH
$7.28B
| $42.5M | 0.03% |
1,192,100
+421,700
| +55% | +$11.5M |
|
313
CALL
Affirm
AFRM
$24.8B
| $41.8M | 0.03% |
925,900
-65,200
| -7% | -$3.86M |
|
314
PUT
DraftKings
DKNG
$11.3B
| $41.4M | 0.03% |
1,245,500
-64,200
| -5% | -$2.64M |
|
315
CALL
Union Pacific
UNP
$174B
| $41.3M | 0.03% |
175,000
-57,000
| -25% | -$13.7M |
|
316
CALL
Pinterest
PINS
$12.6B
| $41.2M | 0.03% |
1,329,300
-434,600
| -25% | -$14.7M |
|
317
CALL
Electronic Arts
EA
$52.4B
| $41M | 0.03% |
283,500
+171,200
| +152% | +$23.1M |
|
318
Pfizer
PFE
$141B
| $41M | 0.03% |
1,616,802
+50,149
| +3% | +$1.31M |
|
|
SCHW
319
CALL
Charles Schwab
SCHW
$175B
| $40.9M | 0.03% |
522,300
-83,600
| -14% | -$6.56M |
|
320
PUT
Apollo Global Management
APO
$68.6B
| $40.5M | 0.03% |
296,000
-59,700
| -17% | -$9.18M |
|
321
PUT
Texas Instruments
TXN
$268B
| $40.4M | 0.03% |
224,600
-96,600
| -30% | -$18.1M |
|
322
PUT
Deere & Co
DE
$164B
| $39.9M | 0.03% |
85,100
-5,000
| -6% | -$2.34M |
|
|
323
PUT
ConocoPhillips
COP
$145B
| $39.8M | 0.03% |
378,800
-494,000
| -57% | -$49.3M |
|
324
PUT
Rivian
RIVN
$24.9B
| $39.8M | 0.03% |
3,192,800
-1,852,000
| -37% | -$23.3M |
|
325
PUT
Philip Morris
PM
$303B
| $39.7M | 0.03% |
349,600
+46,000
| +15% | +$6.52M |
|
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.