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 | |
|---|---|---|---|---|---|---|
1051
PUT
BridgeBio Pharma
BBIO
$16.5B
| $5.5M | ﹤0.01% |
74,000
+52,600
| +246% | +$3.81M |
|
1052
PUT
Best Buy
BBY
$18B
| $5.48M | ﹤0.01% |
85,400
-132,100
| -61% | -$8.67M |
|
1053
CALL
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $5.47M | ﹤0.01% |
+98,600
| New | +$4.78M |
|
1054
CALL
Flex
FLEX
$43.4B
| $5.47M | ﹤0.01% |
83,600
+58,300
| +230% | +$3.73M |
|
1055
CALL
Eldorado Gold
EGO
$8.31B
| $5.47M | ﹤0.01% |
159,200
+35,900
| +29% | +$1.46M |
|
1056
PUT
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $5.46M | ﹤0.01% |
8,500
-3,100
| -27% | -$1.2M |
|
1057
CALL
RH
RH
$3.3B
| $5.45M | ﹤0.01% |
39,000
-21,700
| -36% | -$3.95M |
|
1058
Kodiak Gas Services
KGS
$5.96B
| $5.44M | ﹤0.01% |
93,252
+73,103
| +363% | +$3.55M |
|
1059
PUT
Johnson Controls International
JCI
$87.5B
| $5.43M | ﹤0.01% |
41,500
-56,600
| -58% | -$7.31M |
|
1060
Cardinal Health
CAH
$53.4B
| $5.43M | ﹤0.01% |
25,707
+1,867
| +8% | +$402K |
|
|
1061
PUT
Cardinal Health
CAH
$53.4B
| $5.41M | ﹤0.01% |
25,600
-8,200
| -24% | -$1.77M |
|
1062
PUT
Nokia
NOK
$50.8B
| $5.4M | ﹤0.01% |
671,200
+186,700
| +39% | +$1.37M |
|
1063
PUT
Campbell Soup
CPB
$6.51B
| $5.4M | ﹤0.01% |
242,300
+48,400
| +25% | +$1.24M |
|
1064
CALL
Wolfspeed
WOLF
$1.2B
| $5.39M | ﹤0.01% |
330,200
-677,300
| -67% | -$12.2M |
|
1065
CALL
Expeditors International
EXPD
$22.9B
| $5.39M | ﹤0.01% |
37,600
+37,400
| +18,700% | +$5.68M |
|
1066
PUT
Lightpath Technologies
LPTH
$680M
| $5.38M | ﹤0.01% |
536,600
+340,000
| +173% | +$3.9M |
|
1067
CALL
Marriott International
MAR
$98.7B
| $5.36M | ﹤0.01% |
16,400
-27,400
| -63% | -$9.01M |
|
1068
PUT
Bilibili
BILI
$7.18B
| $5.36M | ﹤0.01% |
237,600
-285,300
| -55% | -$8.22M |
|
1069
CALL
Century Aluminum
CENX
$4.57B
| $5.35M | ﹤0.01% |
91,200
+5,000
| +6% | +$251K |
|
|
1070
PUT
Flex
FLEX
$43.4B
| $5.33M | ﹤0.01% |
81,500
+69,100
| +557% | +$4.42M |
|
1071
CALL
argenx
ARGX
$57.4B
| $5.33M | ﹤0.01% |
7,300
+100
| +1% | +$78.3K |
|
1072
PUT
Elevance Health
ELV
$81.9B
| $5.33M | ﹤0.01% |
+18,200
| New | +$5.98M |
|
1073
CVS Health
CVS
$137B
| $5.33M | ﹤0.01% |
74,158
+27,987
| +61% | +$2.16M |
|
1074
PUT
Infosys
INFY
$45B
| $5.31M | ﹤0.01% |
393,200
-139,200
| -26% | -$2.18M |
|
1075
PUT
abrdn Physical Silver Shares ETF
SIVR
$4.04B
| $5.31M | ﹤0.01% |
74,100
+8,700
| +13% | +$694K |
|
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.