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 | |
|---|---|---|---|---|---|---|
|
BLLN
4751
CALL
BillionToOne Inc
BLLN
$5.8B
| $134K | ﹤0.01% |
+1,700
| New | +$139K |
|
4752
PUT
Tompkins Financial
TMP
$1.45B
| $134K | ﹤0.01% |
1,700
+1,600
| +1,600% | +$124K |
|
4753
Daktronics
DAKT
$941M
| $134K | ﹤0.01% |
+6,844
| New | +$156K |
|
|
CAN
4754
CALL
Canaan Creative
CAN
$176M
| $134K | ﹤0.01% |
309,500
-473,100
| -60% | -$277K |
|
4755
PUT
GoodRx Holdings
GDRX
$1B
| $134K | ﹤0.01% |
68,200
-46,700
| -41% | -$110K |
|
4756
CALL
SOPHiA GENETICS
SOPH
$480M
| $134K | ﹤0.01% |
+27,000
| New | +$131K |
|
4757
CALL
Tecnoglass
TGLS
$2.01B
| $134K | ﹤0.01% |
3,000
| – | – |
|
4758
BlackSky Technology
BKSY
$800M
| $134K | ﹤0.01% |
5,310
-5,361
| -50% | -$128K |
|
4759
PUT
Invesco CurrencyShares Canadian Dollar Trust
FXC
$69.2M
| $133K | ﹤0.01% |
+1,900
| New | +$135K |
|
4760
CALL
Ameriprise Financial
AMP
$46.8B
| $133K | ﹤0.01% |
+300
| New | +$145K |
|
4761
CALL
BlackLine
BL
$1.69B
| $133K | ﹤0.01% |
3,600
+1,300
| +57% | +$56K |
|
4762
CALL
MBIA
MBI
$288M
| $133K | ﹤0.01% |
22,500
| – | – |
|
4763
CALL
Euronet Worldwide
EEFT
$3.02B
| $133K | ﹤0.01% |
2,000
-2,600
| -57% | -$186K |
|
4764
Microbot Medical
MBOT
$115M
| $132K | ﹤0.01% |
54,842
-16,385
| -23% | -$36.6K |
|
4765
PUT
FIVE9
FIVN
$1.77B
| $132K | ﹤0.01% |
8,700
-68,600
| -89% | -$1.19M |
|
4766
PUT
Sky Harbour Group
SKYH
$351M
| $132K | ﹤0.01% |
+13,700
| New | +$126K |
|
4767
CALL
Costamare
CMRE
$1.9B
| $132K | ﹤0.01% |
7,800
-33,800
| -81% | -$561K |
|
4768
PUT
Teleflex
TFX
$5.85B
| $132K | ﹤0.01% |
+1,100
| New | +$121K |
|
|
NMAX
4769
PUT
Newsmax Inc
NMAX
$969M
| $132K | ﹤0.01% |
25,200
-800
| -3% | -$5.4K |
|
4770
Timken Company
TKR
$9.82B
| $131K | ﹤0.01% |
1,307
-3,795
| -74% | -$377K |
|
|
GRAL
4771
GRAIL Inc
GRAL
$2.91B
| $131K | ﹤0.01% |
2,541
-13,510
| -84% | -$1.05M |
|
4772
CALL
AC Immune
ACIU
$227M
| $131K | ﹤0.01% |
47,700
+17,200
| +56% | +$53.4K |
|
4773
Invesco Mortgage Capital
IVR
$776M
| $131K | ﹤0.01% |
+16,223
| New | +$138K |
|
4774
Coca-Cola Consolidated
COKE
$12.3B
| $131K | ﹤0.01% |
682
+591
| +649% | +$104K |
|
4775
CALL
Barnes & Noble Education
BNED
$412M
| $131K | ﹤0.01% |
14,800
+11,200
| +311% | +$96.9K |
|
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.