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 | |
|---|---|---|---|---|---|---|
2526
PUT
Range Resources
RRC
$9.33B
| $971K | ﹤0.01% |
21,500
-4,500
| -17% | -$175K |
|
2527
Coursera
COUR
$1.77B
| $971K | ﹤0.01% |
+166,828
| New | +$1.04M |
|
|
HIVE
2528
CALL
HIVE Digital Technologies
HIVE
$679M
| $968K | ﹤0.01% |
+509,500
| New | +$1.26M |
|
2529
Albertsons Companies
ACI
$5.91B
| $967K | ﹤0.01% |
56,754
+20,927
| +58% | +$363K |
|
2530
CALL
Aurinia Pharmaceuticals
AUPH
$1.95B
| $966K | ﹤0.01% |
65,200
+26,700
| +69% | +$390K |
|
|
SOHU
2531
CALL
Sohu.com
SOHU
$352M
| $966K | ﹤0.01% |
+62,500
| New | +$1.02M |
|
2532
CALL
Iridium Communications
IRDM
$4.7B
| $965K | ﹤0.01% |
34,800
-44,700
| -56% | -$1.01M |
|
2533
CALL
ResMed
RMD
$31.1B
| $965K | ﹤0.01% |
4,300
-1,700
| -28% | -$424K |
|
2534
PUT
Pultegroup
PHM
$25.2B
| $964K | ﹤0.01% |
8,200
-22,700
| -73% | -$2.91M |
|
2535
PUT
UWM Holdings
UWMC
$672M
| $963K | ﹤0.01% |
266,100
+145,600
| +121% | +$670K |
|
2536
ACM Research
ACMR
$4.51B
| $963K | ﹤0.01% |
24,464
-86,488
| -78% | -$4.59M |
|
2537
CALL
Array Technologies
ARRY
$740M
| $962K | ﹤0.01% |
133,100
+42,000
| +46% | +$389K |
|
2538
PUT
Sherwin-Williams
SHW
$84.8B
| $962K | ﹤0.01% |
3,000
+500
| +20% | +$172K |
|
2539
PUT
Aehr Test Systems
AEHR
$2.13B
| $960K | ﹤0.01% |
25,900
-37,300
| -59% | -$1.19M |
|
2540
CALL
Magna International
MGA
$18.8B
| $960K | ﹤0.01% |
17,200
-51,800
| -75% | -$2.96M |
|
2541
CALL
Masco
MAS
$14.6B
| $960K | ﹤0.01% |
15,900
+12,300
| +342% | +$832K |
|
2542
CALL
Lamb Weston
LW
$7.42B
| $959K | ﹤0.01% |
22,700
-39,800
| -64% | -$1.78M |
|
2543
CALL
Dana Inc
DAN
$2.88B
| $959K | ﹤0.01% |
28,500
+28,300
| +14,150% | +$885K |
|
2544
PUT
TransUnion
TRU
$16B
| $955K | ﹤0.01% |
13,800
+12,600
| +1,050% | +$964K |
|
2545
PUT
Acadia Healthcare
ACHC
$2.52B
| $954K | ﹤0.01% |
+40,800
| New | +$739K |
|
2546
PUT
Mid-America Apartment Communities
MAA
$16B
| $953K | ﹤0.01% |
7,800
+7,400
| +1,850% | +$977K |
|
2547
CALL
Krispy Kreme
DNUT
$562M
| $952K | ﹤0.01% |
280,900
-470,100
| -63% | -$1.62M |
|
2548
PUT
BellRing Brands
BRBR
$1.55B
| $951K | ﹤0.01% |
59,100
+35,700
| +153% | +$723K |
|
2549
Wendy's
WEN
$1.46B
| $950K | ﹤0.01% |
136,733
-35,761
| -21% | -$275K |
|
2550
CALL
W&T Offshore
WTI
$525M
| $950K | ﹤0.01% |
278,500
+75,400
| +37% | +$187K |
|
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.