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 | |
|---|---|---|---|---|---|---|
451
PUT
BP
BP
$113B
| $18.6M | 0.01% |
394,700
-35,500
| -8% | -$1.39M |
|
452
PUT
EQT Corp
EQT
$33.4B
| $18.5M | 0.01% |
290,400
-205,800
| -41% | -$12.1M |
|
|
XYZ
453
PUT
Block Inc
XYZ
$45.5B
| $18.5M | 0.01% |
306,900
-203,900
| -40% | -$12.4M |
|
454
State Street Materials Select Sector SPDR ETF
XLB
$8.35B
| $18.4M | 0.01% |
369,219
+258,561
| +234% | +$13M |
|
455
PUT
Texas Instruments
TXN
$259B
| $18.4M | 0.01% |
94,700
-233,700
| -71% | -$47.3M |
|
456
CALL
Celestica
CLS
$38.5B
| $18.3M | 0.01% |
65,100
-56,400
| -46% | -$16.4M |
|
457
PUT
Cipher Digital
CIFR
$10.6B
| $18.2M | 0.01% |
1,414,300
+155,500
| +12% | +$2.46M |
|
458
PUT
Deere & Co
DE
$165B
| $18.2M | 0.01% |
32,300
-13,200
| -29% | -$7.45M |
|
459
CALL
Philip Morris
PM
$298B
| $18.1M | 0.01% |
109,600
-38,100
| -26% | -$6.62M |
|
460
PUT
Strive Inc
ASST
$1.01B
| $18.1M | 0.01% |
1,806,300
+1,774,905
| +5,653% | +$22.1M |
|
461
CALL
Coupang
CPNG
$28.1B
| $18.1M | 0.01% |
958,000
+27,500
| +3% | +$538K |
|
462
CALL
Alcoa
AA
$11.9B
| $18M | 0.01% |
271,800
+38,000
| +16% | +$2.33M |
|
463
CALL
Applied Digital
APLD
$8.54B
| $18M | 0.01% |
758,500
-470,900
| -38% | -$14.7M |
|
464
CALL
Nokia
NOK
$54.3B
| $17.8M | 0.01% |
2,219,200
+636,500
| +40% | +$4.67M |
|
|
465
Netflix
NFLX
$287B
| $17.8M | 0.01% |
184,871
-506,158
| -73% | -$44.6M |
|
466
CALL
T-Mobile US
TMUS
$184B
| $17.7M | 0.01% |
84,500
-102,100
| -55% | -$21M |
|
467
PUT
D-Wave Quantum
QBTS
$6.33B
| $17.6M | 0.01% |
1,221,000
-1,424,300
| -54% | -$30.1M |
|
468
CALL
Live Nation Entertainment
LYV
$41B
| $17.6M | 0.01% |
+115,500
| New | +$17.5M |
|
469
PUT
Planet Labs
PL
$7.97B
| $17.6M | 0.01% |
629,100
+411,300
| +189% | +$10.5M |
|
470
State Street Financial Select Sector SPDR ETF
XLF
$55.1B
| $17.6M | 0.01% |
355,726
+317,647
| +834% | +$16.6M |
|
471
CALL
Apollo Global Management
APO
$68.6B
| $17.6M | 0.01% |
157,600
-160,200
| -50% | -$19.9M |
|
472
CALL
PG&E
PCG
$38.6B
| $17.5M | 0.01% |
995,800
-744,500
| -43% | -$12.7M |
|
|
OKLO
473
CALL
Oklo
OKLO
$7.66B
| $17.5M | 0.01% |
352,600
-273,300
| -44% | -$19.6M |
|
474
CALL
Vertex Pharmaceuticals
VRTX
$120B
| $17.4M | 0.01% |
39,000
-400
| -1% | -$187K |
|
475
CALL
IonQ
IONQ
$12.7B
| $17.4M | 0.01% |
603,800
-6,000
| -1% | -$230K |
|
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.