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 | |
|---|---|---|---|---|---|---|
526
PUT
Warner Bros
WBD
$65.1B
| $15.1M | 0.01% |
549,300
-2,246,700
| -80% | -$62.9M |
|
527
CALL
Stanley Black & Decker
SWK
$13.6B
| $15M | 0.01% |
211,200
-63,700
| -23% | -$5.12M |
|
528
CALL
Roku
ROKU
$21B
| $15M | 0.01% |
158,400
-67,300
| -30% | -$6.55M |
|
529
PUT
Ondas Inc
ONDS
$4.52B
| $15M | 0.01% |
1,657,800
+1,015,900
| +158% | +$11M |
|
530
CALL
S&P Global
SPGI
$124B
| $15M | 0.01% |
35,200
+19,100
| +119% | +$8.87M |
|
531
CALL
Constellation Brands
STZ
$22.1B
| $14.9M | 0.01% |
99,300
-121,900
| -55% | -$18.8M |
|
532
CALL
Hewlett Packard
HPE
$63.1B
| $14.9M | 0.01% |
+625,400
| New | +$13.9M |
|
533
CALL
YPF
YPF
$20.4B
| $14.9M | 0.01% |
321,900
+163,000
| +103% | +$6.17M |
|
|
534
PUT
Roku
ROKU
$21B
| $14.8M | 0.01% |
156,300
-206,400
| -57% | -$20.1M |
|
535
GE Vernova
GEV
$275B
| $14.8M | 0.01% |
16,901
+6,190
| +58% | +$4.83M |
|
536
PUT
Roblox
RBLX
$34B
| $14.7M | 0.01% |
260,600
-65,300
| -20% | -$4.39M |
|
537
CALL
Elevance Health
ELV
$82.3B
| $14.7M | 0.01% |
+50,300
| New | +$16.5M |
|
538
PUT
Ford
F
$56.4B
| $14.7M | 0.01% |
1,274,100
-2,362,400
| -65% | -$31.1M |
|
|
OKLO
539
PUT
Oklo
OKLO
$7.66B
| $14.6M | 0.01% |
295,300
-612,400
| -67% | -$44M |
|
540
CALL
Eaton
ETN
$161B
| $14.6M | 0.01% |
40,800
-23,500
| -37% | -$8.36M |
|
541
PUT
Applied Digital
APLD
$8.54B
| $14.5M | 0.01% |
612,800
-766,400
| -56% | -$24M |
|
|
NVO
542
Novo Nordisk
NVO
$213B
| $14.4M | 0.01% |
392,803
-624,359
| -61% | -$29.6M |
|
543
PUT
Live Nation Entertainment
LYV
$41B
| $14.4M | 0.01% |
+94,400
| New | +$14.3M |
|
544
Freeport-McMoran
FCX
$91.3B
| $14.4M | 0.01% |
244,754
-321,216
| -57% | -$19.4M |
|
545
CALL
Microchip Technology
MCHP
$44.2B
| $14.4M | 0.01% |
222,400
-166,800
| -43% | -$12M |
|
546
CALL
Akamai
AKAM
$17.1B
| $14.3M | 0.01% |
124,300
+33,300
| +37% | +$3.34M |
|
547
PUT
Linde
LIN
$234B
| $14.2M | 0.01% |
28,700
-10,400
| -27% | -$4.91M |
|
548
CALL
Amcor
AMCR
$19.7B
| $14.2M | 0.01% |
356,700
+260,780
| +272% | +$11.5M |
|
549
CALL
Southern Company
SO
$109B
| $14.1M | 0.01% |
145,800
-28,400
| -16% | -$2.63M |
|
550
Booking.com
BKNG
$134B
| $14.1M | 0.01% |
83,500
-45,100
| -35% | -$8.3M |
|
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.