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 | |
|---|---|---|---|---|---|---|
951
PUT
AB InBev
BUD
$158B
| $6.4M | ﹤0.01% |
92,300
-43,000
| -32% | -$3.1M |
|
952
PUT
Biogen
BIIB
$29.9B
| $6.4M | ﹤0.01% |
34,900
-87,400
| -71% | -$16.1M |
|
953
CALL
Zoetis
ZTS
$31.6B
| $6.38M | ﹤0.01% |
54,000
-16,900
| -24% | -$2.09M |
|
954
CALL
DigitalOcean
DOCN
$14.4B
| $6.37M | ﹤0.01% |
74,300
-145,900
| -66% | -$9.2M |
|
|
SEI
955
PUT
Solaris Energy Infrastructure
SEI
$3.31B
| $6.36M | ﹤0.01% |
112,500
+80,700
| +254% | +$4.37M |
|
956
PUT
STMicroelectronics
STM
$46B
| $6.33M | ﹤0.01% |
183,300
+8,800
| +5% | +$275K |
|
957
CALL
Lennar Class A
LEN
$20.4B
| $6.32M | ﹤0.01% |
107,600
-47,900
| -31% | -$5.18M |
|
958
CALL
Simon Property Group
SPG
$74.5B
| $6.32M | ﹤0.01% |
33,900
+10,500
| +45% | +$2M |
|
959
PUT
Caesars Entertainment
CZR
$6.1B
| $6.32M | ﹤0.01% |
+239,200
| New | +$5.69M |
|
960
PUT
Annaly Capital Management
NLY
$16.9B
| $6.32M | ﹤0.01% |
+298,600
| New | +$6.8M |
|
961
PUT
Wendy's
WEN
$1.33B
| $6.31M | ﹤0.01% |
908,300
+796,000
| +709% | +$6.13M |
|
962
CALL
Autodesk
ADSK
$44.3B
| $6.3M | ﹤0.01% |
26,300
-1,200
| -4% | -$302K |
|
963
PUT
Carrier Global
CARR
$57.2B
| $6.26M | ﹤0.01% |
111,200
-165,700
| -60% | -$9.81M |
|
964
CALL
SentinelOne
S
$6.22B
| $6.25M | ﹤0.01% |
485,200
-820,000
| -63% | -$11.4M |
|
965
Direxion Daily 20+ Year Treasury Bull 3X ETF
TMF
$2.22B
| $6.24M | ﹤0.01% |
173,012
+49,562
| +40% | +$1.89M |
|
966
PUT
Duke Energy
DUK
$102B
| $6.23M | ﹤0.01% |
47,600
-44,000
| -48% | -$5.5M |
|
|
CRCO
967
CALL
YieldMax CRCL Option Income Strategy ETF
CRCO
$17.5M
| $6.23M | ﹤0.01% |
312,300
+280,500
| +882% | +$6.45M |
|
|
ETHA
968
iShares Ethereum Trust ETF
ETHA
$5.25B
| $6.22M | ﹤0.01% |
392,685
+242,647
| +162% | +$4.39M |
|
969
CALL
HCA Healthcare
HCA
$84.8B
| $6.2M | ﹤0.01% |
13,100
-6,100
| -32% | -$3.07M |
|
970
CALL
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $6.18M | ﹤0.01% |
226,900
+201,800
| +804% | +$19.2M |
|
971
PUT
Wynn Resorts
WYNN
$10.1B
| $6.17M | ﹤0.01% |
60,800
-125,000
| -67% | -$13.7M |
|
|
MPT
972
PUT
Medical Properties Trust
MPT
$2.89B
| $6.17M | ﹤0.01% |
1,331,600
-696,100
| -34% | -$3.63M |
|
973
CALL
FirstEnergy
FE
$28.9B
| $6.16M | ﹤0.01% |
121,600
-43,300
| -26% | -$2.1M |
|
974
CALL
American International
AIG
$41.9B
| $6.14M | ﹤0.01% |
81,600
-74,300
| -48% | -$5.68M |
|
975
CALL
Barclays
BCS
$94.1B
| $6.12M | ﹤0.01% |
289,200
-34,700
| -11% | -$846K |
|
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.