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 | |
|---|---|---|---|---|---|---|
401
CALL
Okta
OKTA
$23.8B
| $29.7M | 0.02% |
282,500
-26,900
| -9% | -$2.63M |
|
402
CALL
Ford
F
$57.5B
| $29.7M | 0.02% |
2,958,100
-1,624,800
| -35% | -$15.9M |
|
403
CALL
Nucor
NUE
$53.7B
| $29.7M | 0.02% |
246,500
-12,800
| -5% | -$1.65M |
|
404
PUT
Elevance Health
ELV
$84.4B
| $29.6M | 0.02% |
68,100
-16,500
| -20% | -$6.62M |
|
405
CALL
Charter Communications
CHTR
$15.9B
| $29.6M | 0.02% |
80,300
-21,200
| -21% | -$7.58M |
|
406
PUT
Take-Two Interactive
TTWO
$43.4B
| $29.6M | 0.02% |
142,600
-13,600
| -9% | -$2.72M |
|
407
CALL
Core Scientific
CORZ
$7.51B
| $29.4M | 0.02% |
4,054,500
+873,100
| +27% | +$9.94M |
|
408
CALL
Kraft Heinz
KHC
$30.8B
| $29.2M | 0.02% |
958,000
+251,900
| +36% | +$7.54M |
|
409
PUT
BP
BP
$112B
| $28.9M | 0.02% |
855,100
+260,000
| +44% | +$8.49M |
|
410
CALL
Zoom
ZM
$25.2B
| $28.9M | 0.02% |
391,600
-534,600
| -58% | -$42.6M |
|
411
CALL
Shell
SHEL
$243B
| $28.8M | 0.02% |
393,500
+88,800
| +29% | +$5.98M |
|
|
IPFF
412
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $28.7M | 0.02% |
488,000
+215,800
| +79% | +$12.7M |
|
413
CALL
PG&E
PCG
$39.9B
| $28.5M | 0.02% |
1,661,000
+1,401,800
| +541% | +$23.2M |
|
414
CALL
Dow Inc
DOW
$22.5B
| $28.5M | 0.02% |
817,000
+202,900
| +33% | +$7.79M |
|
415
CALL
Medtronic
MDT
$105B
| $28.2M | 0.02% |
314,000
-141,700
| -31% | -$12.7M |
|
416
CALL
Lowe's Companies
LOW
$115B
| $28.1M | 0.02% |
120,400
-69,000
| -36% | -$17M |
|
417
PUT
iShares Gold Trust
IAU
$64.2B
| $27.9M | 0.02% |
474,000
-218,000
| -32% | -$11.8M |
|
418
PUT
Southwest Airlines
LUV
$23.3B
| $27.9M | 0.02% |
832,100
-118,100
| -12% | -$3.74M |
|
419
PUT
Upstart Holdings
UPST
$2.74B
| $27.9M | 0.02% |
606,700
-80,900
| -12% | -$5.03M |
|
420
PUT
Cloudflare
NET
$95.5B
| $27.5M | 0.02% |
244,100
-72,800
| -23% | -$9.65M |
|
421
PUT
NRG Energy
NRG
$29.5B
| $27.3M | 0.02% |
286,400
+117,000
| +69% | +$11.8M |
|
422
CALL
EOG Resources
EOG
$76.7B
| $27.3M | 0.02% |
212,800
-39,400
| -16% | -$5.07M |
|
423
Constellation Energy
CEG
$98.2B
| $27.2M | 0.02% |
135,142
+75,144
| +125% | +$20.1M |
|
424
CALL
Western Digital
WDC
$192B
| $27.1M | 0.02% |
981,000
-105,712
| -10% | -$5.01M |
|
425
CALL
Teva Pharmaceuticals
TEVA
$35.1B
| $27.1M | 0.02% |
1,761,800
-117,200
| -6% | -$2.09M |
|
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.