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 | |
|---|---|---|---|---|---|---|
|
AVR
7551
Anteris Technologies
AVR
$800M
| $8K | ﹤0.01% |
+1,441
| New | +$8.28K |
|
7552
PUT
Goldman Sachs BDC
GSBD
$992M
| $7.99K | ﹤0.01% |
900
-21,500
| -96% | -$198K |
|
7553
Marten Transport
MRTN
$1.42B
| $7.98K | ﹤0.01% |
+608
| New | +$7.8K |
|
7554
CALL
Gain Therapeutics
GANX
$78.5M
| $7.95K | ﹤0.01% |
4,100
-14,500
| -78% | -$31.6K |
|
7555
CALL
Leslie's
LESL
$22.3M
| $7.95K | ﹤0.01% |
7,100
-61,100
| -90% | -$78.6K |
|
7556
CALL
TIM SA
TIMB
$10.6B
| $7.95K | ﹤0.01% |
300
-1,700
| -85% | -$41.6K |
|
7557
PUT
Conduent
CNDT
$248M
| $7.94K | ﹤0.01% |
6,200
+100
| +2% | +$152 |
|
7558
CALL
Backblaze
BLZE
$790M
| $7.93K | ﹤0.01% |
2,300
+1,900
| +475% | +$8K |
|
7559
CALL
John B. Sanfilippo & Son
JBSS
$930M
| $7.93K | ﹤0.01% |
100
| – | – |
|
7560
PUT
Hanmi Financial
HAFC
$958M
| $7.91K | ﹤0.01% |
300
+100
| +50% | +$2.69K |
|
7561
CALL
Tompkins Financial
TMP
$1.34B
| $7.88K | ﹤0.01% |
100
-1,000
| -91% | -$77.8K |
|
|
MDBX
7562
DELISTED
Tradr 2X Long MDB Daily ETF
MDBX
| $7.88K | ﹤0.01% |
+406
| New | +$17.7K |
|
7563
CALL
Vestis
VSTS
$2.12B
| $7.86K | ﹤0.01% |
1,000
-128,500
| -99% | -$939K |
|
|
TUYA
7564
PUT
Tuya Inc
TUYA
$1.07B
| $7.85K | ﹤0.01% |
3,400
-43,000
| -93% | -$98.3K |
|
|
ELVA
7565
PUT
Electrovaya
ELVA
$504M
| $7.82K | ﹤0.01% |
+1,000
| New | +$8.65K |
|
7566
GraniteShares 2x Short TSLA Daily ETF
TSDD
$29M
| $7.82K | ﹤0.01% |
+749
| New | +$6.68K |
|
7567
PUT
CAE Inc
CAE
$7.9B
| $7.82K | ﹤0.01% |
300
-5,800
| -95% | -$176K |
|
7568
Duluth Holdings
DLTH
$160M
| $7.81K | ﹤0.01% |
2,471
+2,445
| +9,404% | +$5.89K |
|
|
GXRP
7569
PUT
Grayscale XRP Trust ETF
GXRP
$54.6M
| $7.81K | ﹤0.01% |
+300
| New | +$9.38K |
|
|
STEX
7570
PUT
Streamex Corp
STEX
$84.4M
| $7.8K | ﹤0.01% |
6,900
-48,000
| -87% | -$122K |
|
7571
PUT
Caribou Biosciences
CRBU
$164M
| $7.79K | ﹤0.01% |
4,100
-900
| -18% | -$1.54K |
|
|
ZENA
7572
PUT
ZenaTech Inc
ZENA
$132M
| $7.79K | ﹤0.01% |
3,400
+2,800
| +467% | +$8.47K |
|
7573
PUT
GoPro
GPRO
$125M
| $7.78K | ﹤0.01% |
10,100
-52,500
| -84% | -$52.8K |
|
7574
CALL
Liberty Latin America Class C
LILAK
$1.47B
| $7.78K | ﹤0.01% |
+990
| New | +$7.06K |
|
7575
CALL
Diana Shipping
DSX
$276M
| $7.75K | ﹤0.01% |
3,100
+2,800
| +933% | +$6.42K |
|
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.