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 | |
|---|---|---|---|---|---|---|
3776
CALL
TPG
TPG
$7.01B
| $316K | ﹤0.01% |
7,800
-20,700
| -73% | -$1.06M |
|
3777
PUT
Gold Royalty Corp
GROY
$600M
| $315K | ﹤0.01% |
88,100
-93,400
| -51% | -$399K |
|
3778
PUT
Weyerhaeuser
WY
$18B
| $315K | ﹤0.01% |
12,900
+4,400
| +52% | +$111K |
|
|
LITX
3779
Tradr 2X Long LITE Daily ETF
LITX
$203M
| $315K | ﹤0.01% |
+10,760
| New | +$284K |
|
3780
PUT
4D Molecular Therapeutics
FDMT
$532M
| $315K | ﹤0.01% |
+33,800
| New | +$294K |
|
3781
PUT
Huntington Bancshares
HBAN
$34.4B
| $315K | ﹤0.01% |
20,100
-72,100
| -78% | -$1.23M |
|
3782
PUT
NovoCure
NVCR
$1.73B
| $314K | ﹤0.01% |
28,800
+19,600
| +213% | +$245K |
|
3783
CALL
Rayonier
RYN
$6.55B
| $313K | ﹤0.01% |
15,200
+8,900
| +141% | +$196K |
|
3784
PUT
Limbach Holdings
LMB
$855M
| $312K | ﹤0.01% |
+4,000
| New | +$337K |
|
3785
PUT
Graphic Packaging
GPK
$3.17B
| $312K | ﹤0.01% |
31,400
-9,400
| -23% | -$118K |
|
3786
Western Union
WU
$1.98B
| $311K | ﹤0.01% |
35,661
-157,901
| -82% | -$1.49M |
|
3787
GoPro
GPRO
$130M
| $311K | ﹤0.01% |
404,083
-293,140
| -42% | -$295K |
|
3788
PUT
Kyndryl
KD
$2.99B
| $311K | ﹤0.01% |
23,700
-32,900
| -58% | -$579K |
|
3789
CALL
ProShares UltraShort Industrials
SIJ
$5.89M
| $311K | ﹤0.01% |
3,200
+1,050
| +49% | +$20.4K |
|
3790
SM Energy
SM
$7.8B
| $311K | ﹤0.01% |
+9,968
| New | +$227K |
|
3791
iShares MSCI Mexico ETF
EWW
$1.92B
| $310K | ﹤0.01% |
4,122
+1,599
| +63% | +$121K |
|
|
KALV
3792
PUT
DELISTED
KalVista Pharmaceuticals
KALV
| $310K | ﹤0.01% |
+15,400
| New | +$248K |
|
3793
PUT
HUB Group
HUBG
$2.85B
| $310K | ﹤0.01% |
8,600
+2,500
| +41% | +$106K |
|
3794
CALL
Vanguard ESG US Corporate Bond ETF
VCEB
$1.18B
| $309K | ﹤0.01% |
1,600
-19,800
| -93% | -$1.26M |
|
3795
PUT
Nektar Therapeutics
NKTR
$2.39B
| $309K | ﹤0.01% |
4,300
-5,700
| -57% | -$325K |
|
3796
CALL
Invesco CurrencyShares Swiss Franc Trust
FXF
$414M
| $309K | ﹤0.01% |
+2,800
| New | +$316K |
|
3797
Enliven Therapeutics
ELVN
$3.92B
| $309K | ﹤0.01% |
7,883
+5,234
| +198% | +$145K |
|
|
DEA
3798
PUT
Easterly Government Properties
DEA
$1.13B
| $309K | ﹤0.01% |
14,400
+400
| +3% | +$9.14K |
|
|
SRG
3799
CALL
Seritage Growth Properties
SRG
$136M
| $309K | ﹤0.01% |
109,800
-95,400
| -46% | -$298K |
|
3800
CALL
Sonos
SONO
$1.73B
| $308K | ﹤0.01% |
23,000
-58,500
| -72% | -$884K |
|
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.