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 | |
|---|---|---|---|---|---|---|
926
Delta Air Lines
DAL
$55.9B
| $6.53M | ﹤0.01% |
+98,263
| New | +$6.62M |
|
927
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $6.53M | ﹤0.01% |
61,200
-25,600
| -29% | -$2.76M |
|
|
EXK
928
CALL
Endeavour Silver
EXK
$2.32B
| $6.52M | ﹤0.01% |
700,500
-265,500
| -27% | -$3M |
|
929
CALL
Olin
OLN
$2.64B
| $6.52M | ﹤0.01% |
219,300
+188,100
| +603% | +$4.6M |
|
930
PUT
HF Sinclair
DINO
$15.9B
| $6.52M | ﹤0.01% |
104,500
+30,600
| +41% | +$1.66M |
|
931
CALL
Chubb
CB
$140B
| $6.52M | ﹤0.01% |
20,000
-20,900
| -51% | -$6.71M |
|
|
FITB
932
CALL
Fifth Third Bancorp
FITB
$52B
| $6.51M | ﹤0.01% |
140,100
+6,400
| +5% | +$315K |
|
933
CALL
Cencora
COR
$60.3B
| $6.5M | ﹤0.01% |
20,700
-5,600
| -21% | -$1.96M |
|
934
PUT
AXT Inc
AXTI
$3.09B
| $6.5M | ﹤0.01% |
114,100
+105,200
| +1,182% | +$3.49M |
|
935
CALL
Trip.com Group
TCOM
$27.5B
| $6.5M | ﹤0.01% |
130,500
+76,200
| +140% | +$4.44M |
|
936
CALL
Powell Industries
POWL
$8.46B
| $6.49M | ﹤0.01% |
36,000
-1,800
| -5% | -$294K |
|
937
CALL
Okta
OKTA
$24.1B
| $6.49M | ﹤0.01% |
82,400
-117,400
| -59% | -$9.74M |
|
938
Oscar Health
OSCR
$8.5B
| $6.48M | ﹤0.01% |
565,246
-73,990
| -12% | -$1.04M |
|
939
PUT
YPF
YPF
$20.2B
| $6.47M | ﹤0.01% |
140,000
+4,300
| +3% | +$163K |
|
940
PUT
Brookfield Asset Management
BAM
$74B
| $6.46M | ﹤0.01% |
+145,400
| New | +$7.1M |
|
941
PUT
XPeng
XPEV
$11.8B
| $6.46M | ﹤0.01% |
377,400
-253,400
| -40% | -$4.7M |
|
942
CALL
Antero Resources
AR
$10.9B
| $6.45M | ﹤0.01% |
152,000
-306,800
| -67% | -$11.2M |
|
943
CALL
Fastly Inc
FSLY
$3.17B
| $6.45M | ﹤0.01% |
221,900
-50,400
| -19% | -$827K |
|
944
Corning
GLW
$126B
| $6.45M | ﹤0.01% |
47,403
+14,806
| +45% | +$1.79M |
|
945
CALL
Hershey
HSY
$35.4B
| $6.44M | ﹤0.01% |
31,000
-17,300
| -36% | -$3.65M |
|
946
PUT
Mondelez International
MDLZ
$77.7B
| $6.44M | ﹤0.01% |
111,800
-89,800
| -45% | -$5.2M |
|
|
TERN
947
CALL
DELISTED
Terns Pharmaceuticals
TERN
| $6.42M | ﹤0.01% |
121,700
+80,700
| +197% | +$3.31M |
|
948
CALL
Monster Beverage
MNST
$91.4B
| $6.41M | ﹤0.01% |
88,500
+29,400
| +50% | +$2.32M |
|
949
PUT
On Holding
ONON
$11.9B
| $6.41M | ﹤0.01% |
188,400
-311,300
| -62% | -$13.6M |
|
950
CALL
United Therapeutics
UTHR
$26.3B
| $6.4M | ﹤0.01% |
+10,800
| New | +$5.38M |
|
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.