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 | |
|---|---|---|---|---|---|---|
701
PUT
eBay
EBAY
$48.5B
| $9.92M | 0.01% |
109,000
-57,400
| -34% | -$5.16M |
|
|
JBS
702
CALL
JBS N.V.
JBS
$40.3B
| $9.91M | 0.01% |
552,000
-354,200
| -39% | -$5.51M |
|
703
AXT Inc
AXTI
$3.2B
| $9.89M | 0.01% |
173,574
+85,881
| +98% | +$2.85M |
|
704
CALL
Carlyle Group
CG
$16.3B
| $9.87M | 0.01% |
203,900
-33,800
| -14% | -$1.86M |
|
|
XIFR
705
CALL
XPLR Infrastructure LP
XIFR
$1.19B
| $9.86M | 0.01% |
928,400
-128,200
| -12% | -$1.32M |
|
706
CALL
SGHC Ltd
SGHC
$7.31B
| $9.83M | 0.01% |
909,800
+360,600
| +66% | +$3.68M |
|
707
PUT
Ares Management
ARES
$28.1B
| $9.74M | 0.01% |
89,300
+24,700
| +38% | +$3.28M |
|
708
PUT
Enphase Energy
ENPH
$4.94B
| $9.74M | 0.01% |
257,600
-88,600
| -26% | -$3.68M |
|
709
CALL
Zeta Global
ZETA
$4.78B
| $9.73M | 0.01% |
611,400
-69,400
| -10% | -$1.28M |
|
710
PUT
Constellation Brands
STZ
$22.3B
| $9.72M | 0.01% |
64,800
-33,000
| -34% | -$5.1M |
|
711
PUT
EOG Resources
EOG
$77.8B
| $9.72M | 0.01% |
67,200
-150,500
| -69% | -$18.3M |
|
712
CALL
AGNC Investment
AGNC
$12.3B
| $9.67M | 0.01% |
964,600
+268,000
| +38% | +$2.96M |
|
713
CALL
Abbott
ABT
$180B
| $9.66M | 0.01% |
94,100
-123,200
| -57% | -$13.9M |
|
714
PUT
Comcast
CMCSA
$79.4B
| $9.66M | 0.01% |
336,400
-1,425,400
| -81% | -$42.7M |
|
715
CALL
DoorDash
DASH
$75.5B
| $9.65M | 0.01% |
64,300
-67,000
| -51% | -$12.4M |
|
716
CALL
ProShares Ultra S&P500
SSO
$7.88B
| $9.59M | 0.01% |
168,800
-42,200
| -20% | -$2.41M |
|
717
PUT
Lumen
LUMN
$6.66B
| $9.57M | 0.01% |
1,377,000
-496,400
| -26% | -$3.76M |
|
718
CALL
D-Wave Quantum
QBTS
$6.08B
| $9.53M | 0.01% |
660,200
-743,200
| -53% | -$15.7M |
|
719
PUT
Pan American Silver
PAAS
$18.7B
| $9.51M | 0.01% |
174,000
-324,900
| -65% | -$18.7M |
|
720
PUT
UBS Group
UBS
$170B
| $9.49M | 0.01% |
242,800
-129,200
| -35% | -$5.53M |
|
|
721
CALL
Ares Management
ARES
$28.1B
| $9.48M | 0.01% |
86,900
+31,500
| +57% | +$4.18M |
|
722
CALL
Cenovus Energy
CVE
$54.6B
| $9.46M | 0.01% |
356,700
+21,500
| +6% | +$458K |
|
723
PUT
Kimberly-Clark
KMB
$36.1B
| $9.43M | 0.01% |
97,800
-120,200
| -55% | -$12.3M |
|
724
CALL
Cadence Design Systems
CDNS
$91.4B
| $9.42M | 0.01% |
33,900
+5,700
| +20% | +$1.7M |
|
725
Invesco QQQ Trust
QQQ
$458B
| $9.41M | 0.01% |
+16,296
| New | +$9.9M |
|
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.