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 | |
|---|---|---|---|---|---|---|
2626
Arrowhead Research
ARWR
$12.1B
| $895K | ﹤0.01% |
+14,281
| New | +$904K |
|
2627
PUT
Varonis Systems
VRNS
$4.67B
| $895K | ﹤0.01% |
41,700
-21,400
| -34% | -$580K |
|
2628
CALL
Unusual Machines
UMAC
$825M
| $895K | ﹤0.01% |
72,200
+9,800
| +16% | +$149K |
|
2629
PUT
Blackstone Mortgage Trust
BXMT
$2.77B
| $894K | ﹤0.01% |
46,700
-94,800
| -67% | -$1.83M |
|
2630
CALL
IMAX
IMAX
$2.67B
| $893K | ﹤0.01% |
23,500
+16,400
| +231% | +$609K |
|
|
AMZO
2631
CALL
Tradr 2X Short AMZN Daily ETF
AMZO
$1.19M
| $892K | ﹤0.01% |
+28,900
| New | +$750K |
|
2632
PUT
Ovintiv
OVV
$17B
| $890K | ﹤0.01% |
15,000
-43,000
| -74% | -$2.07M |
|
2633
CALL
Sunoco
SUN
$14.4B
| $890K | ﹤0.01% |
13,700
+7,800
| +132% | +$473K |
|
2634
PUT
Kinsale Capital Group
KNSL
$8.58B
| $888K | ﹤0.01% |
2,600
+2,400
| +1,200% | +$909K |
|
2635
CALL
Noble Corp
NE
$6.54B
| $888K | ﹤0.01% |
18,100
-6,800
| -27% | -$278K |
|
2636
CALL
Diodes
DIOD
$3.5B
| $887K | ﹤0.01% |
13,000
+10,200
| +364% | +$643K |
|
2637
CALL
TKO Group
TKO
$14B
| $887K | ﹤0.01% |
4,400
+1,600
| +57% | +$327K |
|
2638
CALL
Vanda Pharmaceuticals
VNDA
$304M
| $887K | ﹤0.01% |
128,300
+66,200
| +107% | +$511K |
|
2639
CALL
Ferrovial N.V. Ordinary Shares
FER
$44.7B
| $885K | ﹤0.01% |
+13,731
| New | +$925K |
|
2640
CALL
Healthpeak Properties
DOC
$15.5B
| $884K | ﹤0.01% |
53,800
+40,800
| +314% | +$699K |
|
2641
Adecoagro
AGRO
$1.4B
| $881K | ﹤0.01% |
58,681
+6,574
| +13% | +$64.9K |
|
2642
CALL
Wave Life Sciences
WVE
$1.12B
| $881K | ﹤0.01% |
121,500
-89,300
| -42% | -$1.16M |
|
2643
PUT
Unifirst Corp
UNF
$5.45B
| $881K | ﹤0.01% |
3,500
+3,400
| +3,400% | +$784K |
|
2644
CALL
Northern Oil and Gas
NOG
$2.29B
| $880K | ﹤0.01% |
30,100
+9,000
| +43% | +$233K |
|
|
KC
2645
CALL
Kingsoft Cloud Holdings
KC
$2.96B
| $879K | ﹤0.01% |
65,800
+27,500
| +72% | +$359K |
|
2646
CALL
Corteva
CTVA
$60.5B
| $879K | ﹤0.01% |
10,500
+5,400
| +106% | +$407K |
|
|
NB
2647
CALL
NioCorp Developments
NB
$562M
| $877K | ﹤0.01% |
196,600
-26,300
| -12% | -$151K |
|
2648
CALL
Knight Transportation
KNX
$11.5B
| $875K | ﹤0.01% |
+15,200
| New | +$872K |
|
2649
CALL
Paycom
PAYC
$7.88B
| $875K | ﹤0.01% |
7,200
-7,600
| -51% | -$1.02M |
|
2650
PUT
Karyopharm Therapeutics
KPTI
$155M
| $874K | ﹤0.01% |
156,900
+25,100
| +19% | +$191K |
|
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.