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 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
SHNY
501
PUT
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $16.1M | 0.01% |
443,600
+100,400
| +29% | +$3.65M |
|
502
CALL
Transocean
RIG
$5.89B
| $16.1M | 0.01% |
2,424,200
-165,700
| -6% | -$933K |
|
|
DOCU
503
PUT
DocuSign
DOCU
$8.98B
| $16M | 0.01% |
338,000
-26,200
| -7% | -$1.34M |
|
504
CALL
Texas Pacific Land
TPL
$29.4B
| $15.9M | 0.01% |
+33,600
| New | +$14.4M |
|
505
PUT
Astera Labs
ALAB
$56B
| $15.9M | 0.01% |
145,200
-154,500
| -52% | -$22M |
|
506
PUT
Credo Technology Group
CRDO
$44.1B
| $15.8M | 0.01% |
+167,900
| New | +$20.4M |
|
507
CALL
Zoom
ZM
$24.7B
| $15.7M | 0.01% |
195,300
-168,700
| -46% | -$14.1M |
|
508
PUT
Invesco Aerospace & Defense ETF
PPA
$8.22B
| $15.7M | 0.01% |
+85,100
| New | +$14.9M |
|
509
CALL
Lowe's Companies
LOW
$113B
| $15.6M | 0.01% |
66,100
-15,500
| -19% | -$4.04M |
|
510
CALL
Cleveland-Cliffs
CLF
$6.25B
| $15.6M | 0.01% |
1,843,400
-9,800
| -0.5% | -$112K |
|
511
PUT
Trade Desk
TTD
$7.89B
| $15.5M | 0.01% |
685,000
-399,500
| -37% | -$11.5M |
|
512
CALL
Plains All American Pipeline
PAA
$17.4B
| $15.5M | 0.01% |
695,300
+230,000
| +49% | +$4.68M |
|
513
PUT
Eaton
ETN
$161B
| $15.5M | 0.01% |
43,300
-11,100
| -20% | -$3.95M |
|
514
PUT
KLA
KLAC
$286B
| $15.5M | 0.01% |
105,000
-165,000
| -61% | -$24.1M |
|
515
PUT
Shell
SHEL
$243B
| $15.4M | 0.01% |
166,100
+43,000
| +35% | +$3.47M |
|
516
PUT
Fastly Inc
FSLY
$3.04B
| $15.4M | 0.01% |
530,100
+505,100
| +2,020% | +$8.29M |
|
517
SoFi Technologies
SOFI
$21.4B
| $15.4M | 0.01% |
968,408
-837,994
| -46% | -$17.7M |
|
518
CALL
Sprott Uranium Miners ETF
URNM
$1.84B
| $15.3M | 0.01% |
261,300
+142,400
| +120% | +$9.73M |
|
519
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$246M
| $15.3M | 0.01% |
+582,400
| New | +$28.1M |
|
520
CALL
Madrigal Pharmaceuticals
MDGL
$12.5B
| $15.3M | 0.01% |
+29,200
| New | +$14M |
|
521
CALL
FedEx
FDX
$74.7B
| $15.3M | 0.01% |
42,900
-1,200
| -3% | -$417K |
|
522
PUT
CME Group
CME
$91.9B
| $15.2M | 0.01% |
51,500
+22,000
| +75% | +$6.53M |
|
523
CALL
Teradyne
TER
$58.5B
| $15.2M | 0.01% |
51,300
-105,800
| -67% | -$29.5M |
|
524
CALL
KKR & Co
KKR
$86.2B
| $15.1M | 0.01% |
163,700
-5,100
| -3% | -$538K |
|
|
FISV
525
CALL
Fiserv Inc
FISV
$26.6B
| $15.1M | 0.01% |
270,500
-203,600
| -43% | -$12.6M |
|
Similar funds
Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,156 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.