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 | |
|---|---|---|---|---|---|---|
3826
Recursion Pharmaceuticals
RXRX
$1.59B
| $298K | ﹤0.01% |
+97,118
| New | +$375K |
|
3827
Equity Residential
EQR
$24.9B
| $298K | ﹤0.01% |
5,040
-738
| -13% | -$45.5K |
|
|
TIC
3828
CALL
TIC Solutions Inc
TIC
$1.62B
| $298K | ﹤0.01% |
45,300
+23,000
| +103% | +$216K |
|
3829
Boston Beer
SAM
$1.91B
| $298K | ﹤0.01% |
1,292
+381
| +42% | +$85.7K |
|
3830
Eaton
ETN
$161B
| $297K | ﹤0.01% |
831
-2,491
| -75% | -$886K |
|
3831
CALL
Pebblebrook Hotel Trust
PEB
$2.15B
| $297K | ﹤0.01% |
23,500
+6,300
| +37% | +$77.2K |
|
|
DRD
3832
CALL
DRDGold
DRD
$1.77B
| $297K | ﹤0.01% |
10,100
+4,400
| +77% | +$146K |
|
3833
CALL
RCI Hospitality Holdings
RICK
$192M
| $297K | ﹤0.01% |
13,000
+8,200
| +171% | +$193K |
|
3834
PUT
Cellebrite
CLBT
$3.68B
| $296K | ﹤0.01% |
21,500
+8,900
| +71% | +$134K |
|
3835
Biohaven
BHVN
$2.03B
| $296K | ﹤0.01% |
34,937
+6,125
| +21% | +$67K |
|
3836
Yext
YEXT
$547M
| $295K | ﹤0.01% |
76,822
-75,657
| -50% | -$455K |
|
3837
CALL
BJ's Restaurants
BJRI
$1.42B
| $295K | ﹤0.01% |
8,400
-4,600
| -35% | -$184K |
|
3838
CALL
Ring Energy
REI
$315M
| $295K | ﹤0.01% |
192,700
-265,900
| -58% | -$338K |
|
3839
PUT
Martin Marietta Materials
MLM
$31.5B
| $294K | ﹤0.01% |
500
+300
| +150% | +$191K |
|
3840
CALL
Genesis Energy
GEL
$1.87B
| $294K | ﹤0.01% |
16,500
+9,600
| +139% | +$166K |
|
3841
CALL
Transportadora de Gas del Sur
TGS
$4.79B
| $294K | ﹤0.01% |
+8,500
| New | +$261K |
|
3842
Forward Air
FWRD
$444M
| $294K | ﹤0.01% |
17,599
-119,931
| -87% | -$2.92M |
|
|
OPRA
3843
PUT
Opera Ltd
OPRA
$1.69B
| $294K | ﹤0.01% |
20,600
-34,400
| -63% | -$476K |
|
3844
CALL
TFI International
TFII
$11.1B
| $293K | ﹤0.01% |
2,700
-3,600
| -57% | -$402K |
|
3845
CALL
Mid-America Apartment Communities
MAA
$15.4B
| $293K | ﹤0.01% |
2,400
-900
| -27% | -$119K |
|
3846
CALL
Gentex
GNTX
$4.97B
| $293K | ﹤0.01% |
13,400
+13,300
| +13,300% | +$308K |
|
3847
CALL
Crown Castle
CCI
$33.3B
| $293K | ﹤0.01% |
3,600
-54,000
| -94% | -$4.65M |
|
3848
PUT
OSI Systems
OSIS
$3.65B
| $292K | ﹤0.01% |
1,100
+800
| +267% | +$221K |
|
3849
Contango Silver & Gold Inc
CTGO
$516M
| $292K | ﹤0.01% |
+15,575
| New | +$411K |
|
3850
CALL
Dover
DOV
$27.6B
| $292K | ﹤0.01% |
1,400
-5,600
| -80% | -$1.2M |
|
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.