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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
551
CALL
Viatris
VTRS
$21B
| $14M | 0.01% |
1,038,300
+689,400
| +198% | +$9.65M |
|
552
CALL
Blue Owl Capital
OWL
$6.26B
| $14M | 0.01% |
1,530,900
+997,500
| +187% | +$12.1M |
|
|
VG
553
CALL
Venture Global Inc
VG
$32.2B
| $13.9M | 0.01% |
881,600
+506,400
| +135% | +$5.43M |
|
554
CALL
UiPath
PATH
$6.35B
| $13.9M | 0.01% |
1,251,400
+101,400
| +9% | +$1.29M |
|
555
PUT
Okta
OKTA
$35.3B
| $13.9M | 0.01% |
176,400
-42,200
| -19% | -$3.5M |
|
556
CALL
Ulta Beauty
ULTA
$23.5B
| $13.8M | 0.01% |
26,400
-16,400
| -38% | -$10.4M |
|
557
PUT
Fortinet
FTNT
$129B
| $13.8M | 0.01% |
168,800
-110,600
| -40% | -$8.93M |
|
558
PUT
Nu Holdings
NU
$59.1B
| $13.8M | 0.01% |
958,100
-783,900
| -45% | -$12.7M |
|
559
CALL
Grab
GRAB
$12.7B
| $13.8M | 0.01% |
3,758,800
+524,300
| +16% | +$2.22M |
|
560
PUT
Norwegian Cruise Line
NCLH
$6.57B
| $13.7M | 0.01% |
+733,000
| New | +$16M |
|
561
CALL
Tapestry
TPR
$22.6B
| $13.7M | 0.01% |
97,000
-6,800
| -7% | -$964K |
|
562
CALL
Take-Two Interactive
TTWO
$37.8B
| $13.6M | 0.01% |
+69,100
| New | +$15M |
|
563
PUT
Microchip Technology
MCHP
$42.3B
| $13.6M | 0.01% |
210,900
-83,500
| -28% | -$6.01M |
|
564
PUT
Southern Company
SO
$94.7B
| $13.6M | 0.01% |
141,100
-6,100
| -4% | -$564K |
|
565
CALL
Altria Group
MO
$115B
| $13.6M | 0.01% |
205,900
-135,500
| -40% | -$8.72M |
|
|
TEM
566
PUT
Tempus AI
TEM
$15.4B
| $13.6M | 0.01% |
299,900
+214,800
| +252% | +$12.2M |
|
567
PUT
Amphenol
APH
$209B
| $13.6M | 0.01% |
214,600
-118,400
| -36% | -$8.33M |
|
568
PUT
TJX Companies
TJX
$143B
| $13.5M | 0.01% |
84,800
-86,900
| -51% | -$13.5M |
|
569
CALL
Plains GP Holdings
PAGP
$5.26B
| $13.5M | 0.01% |
557,000
+162,700
| +41% | +$3.55M |
|
570
Charter Communications
CHTR
$12.8B
| $13.5M | 0.01% |
+62,565
| New | +$13.6M |
|
571
CALL
Kroger
KR
$35.3B
| $13.5M | 0.01% |
186,600
-180,300
| -49% | -$12.2M |
|
572
PUT
Hecla Mining
HL
$11.4B
| $13.4M | 0.01% |
720,400
+263,100
| +58% | +$5.92M |
|
|
573
Broadcom
AVGO
$1.67T
| $13.4M | 0.01% |
43,244
-188,929
| -81% | -$62.2M |
|
574
CALL
First Horizon
FHN
$11B
| $13.4M | 0.01% |
588,000
-225,900
| -28% | -$5.4M |
|
575
PUT
Antero Resources
AR
$10.6B
| $13.4M | 0.01% |
315,000
+223,300
| +244% | +$8.15M |
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.