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 | |
|---|---|---|---|---|---|---|
2651
Exelon
EXC
$48.1B
| $873K | ﹤0.01% |
+17,819
| New | +$829K |
|
2652
Toyota
TM
$228B
| $872K | ﹤0.01% |
4,231
-2,419
| -36% | -$547K |
|
2653
KNOT Offshore Partners
KNOP
$354M
| $870K | ﹤0.01% |
86,342
+609
| +0.7% | +$6.33K |
|
2654
PUT
ICICI Bank
IBN
$107B
| $868K | ﹤0.01% |
33,500
+24,000
| +253% | +$704K |
|
2655
CALL
Full Truck Alliance
YMM
$10B
| $867K | ﹤0.01% |
104,500
+100,400
| +2,449% | +$955K |
|
2656
CALL
dLocal
DLO
$4.29B
| $866K | ﹤0.01% |
66,800
-678,100
| -91% | -$8.83M |
|
2657
PUT
Paylocity
PCTY
$7.75B
| $864K | ﹤0.01% |
8,000
+6,400
| +400% | +$785K |
|
2658
PUT
Imperial Oil
IMO
$62.3B
| $863K | ﹤0.01% |
6,600
+4,600
| +230% | +$516K |
|
2659
CALL
International Flavors & Fragrances
IFF
$20.3B
| $863K | ﹤0.01% |
+11,900
| New | +$873K |
|
2660
CALL
Scholastic
SCHL
$774M
| $863K | ﹤0.01% |
22,100
+22,000
| +22,000% | +$760K |
|
2661
CALL
Mattel
MAT
$4.47B
| $862K | ﹤0.01% |
59,300
-10,300
| -15% | -$188K |
|
2662
CALL
ASE Group
ASX
$68.3B
| $861K | ﹤0.01% |
39,700
-75,400
| -66% | -$1.59M |
|
2663
CALL
Corbus Pharmaceuticals
CRBP
$165M
| $860K | ﹤0.01% |
+91,600
| New | +$771K |
|
2664
Evolv Technologies
EVLV
$998M
| $860K | ﹤0.01% |
+142,130
| New | +$832K |
|
2665
PUT
Ryder
R
$9.9B
| $860K | ﹤0.01% |
4,200
+4,100
| +4,100% | +$829K |
|
|
MRP
2666
CALL
Millrose Properties Inc
MRP
$4.66B
| $860K | ﹤0.01% |
30,700
+26,400
| +614% | +$795K |
|
2667
Brown-Forman Class B
BF.B
$13.5B
| $859K | ﹤0.01% |
32,502
+25,387
| +357% | +$682K |
|
2668
CALL
Xcel Energy
XEL
$49.2B
| $858K | ﹤0.01% |
10,800
-31,800
| -75% | -$2.49M |
|
2669
PUT
Fox Class B
FOX
$22.1B
| $857K | ﹤0.01% |
14,700
+2,100
| +17% | +$121K |
|
2670
PUT
IAMGOLD
IAG
$8.05B
| $856K | ﹤0.01% |
45,500
-33,000
| -42% | -$654K |
|
2671
PUT
Americold
COLD
$4.21B
| $856K | ﹤0.01% |
74,700
+45,200
| +153% | +$566K |
|
2672
PUT
ADMA Biologics
ADMA
$2.02B
| $856K | ﹤0.01% |
95,000
+16,600
| +21% | +$262K |
|
2673
Valley National Bancorp
VLY
$7.9B
| $856K | ﹤0.01% |
69,669
+44,343
| +175% | +$552K |
|
2674
Hallador Energy
HNRG
$646M
| $855K | ﹤0.01% |
52,528
+20,897
| +66% | +$389K |
|
|
RGTX
2675
PUT
Defiance Daily Target 2X Long RGTI ETF
RGTX
$36.3M
| $855K | ﹤0.01% |
+39,100
| New | +$1.27M |
|
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.