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 | |
|---|---|---|---|---|---|---|
3401
CALL
Vera Therapeutics
VERA
$2.37B
| $447K | ﹤0.01% |
11,100
+1,700
| +18% | +$73.2K |
|
|
TE
3402
PUT
T1 Energy
TE
$1.19B
| $446K | ﹤0.01% |
101,700
-150,000
| -60% | -$1.1M |
|
3403
James Hardie Industries
JHX
$15.4B
| $446K | ﹤0.01% |
23,565
+12,081
| +105% | +$272K |
|
3404
PUT
Immunome
IMNM
$2.61B
| $446K | ﹤0.01% |
20,400
-16,800
| -45% | -$374K |
|
3405
PUT
Aramark
ARMK
$15.1B
| $446K | ﹤0.01% |
11,000
-34,800
| -76% | -$1.38M |
|
3406
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$438M
| $446K | ﹤0.01% |
+7,700
| New | +$451K |
|
3407
Primoris Services
PRIM
$4.65B
| $445K | ﹤0.01% |
+3,113
| New | +$456K |
|
3408
CALL
Kaspi.kz JSC
KSPI
$16.9B
| $444K | ﹤0.01% |
6,000
+4,500
| +300% | +$340K |
|
3409
NOV
NOV
$6.88B
| $443K | ﹤0.01% |
+23,557
| New | +$442K |
|
|
SII
3410
CALL
Sprott
SII
$2.75B
| $443K | ﹤0.01% |
3,100
-1,000
| -24% | -$134K |
|
|
ABTC
3411
CALL
American Bitcoin Corp
ABTC
$431M
| $443K | ﹤0.01% |
31,960
+25,453
| +391% | +$490K |
|
3412
PUT
Bentley Systems
BSY
$10.7B
| $443K | ﹤0.01% |
12,600
+1,100
| +10% | +$40.4K |
|
3413
iShares US Technology ETF
IYW
$23.5B
| $442K | ﹤0.01% |
+2,438
| New | +$471K |
|
|
GEMI
3414
CALL
Gemini Space Station
GEMI
$520M
| $442K | ﹤0.01% |
100,000
-223,200
| -69% | -$1.76M |
|
|
ADUR
3415
PUT
Aduro Clean Technologies
ADUR
$486M
| $442K | ﹤0.01% |
+42,100
| New | +$498K |
|
3416
PUT
Denison Mines
DNN
$2.64B
| $441K | ﹤0.01% |
125,000
-159,000
| -56% | -$598K |
|
3417
CALL
Levi Strauss
LEVI
$9.45B
| $440K | ﹤0.01% |
23,800
-103,000
| -81% | -$2.11M |
|
3418
PUT
Recursion Pharmaceuticals
RXRX
$1.61B
| $440K | ﹤0.01% |
+143,300
| New | +$554K |
|
3419
PUT
Elastic
ESTC
$6.68B
| $440K | ﹤0.01% |
8,800
-8,200
| -48% | -$504K |
|
|
CRCG
3420
PUT
Leverage Shares 2X Long CRCL Daily ETF
CRCG
$86.7M
| $440K | ﹤0.01% |
15,770
+13,880
| +734% | +$375K |
|
|
TWO
3421
PUT
Two Harbors Investment
TWO
$1.27B
| $440K | ﹤0.01% |
38,500
-66,700
| -63% | -$747K |
|
3422
BrightSpring Health Services
BTSG
$14.3B
| $439K | ﹤0.01% |
+10,313
| New | +$415K |
|
3423
PUT
Atlanta Braves Holdings Series B
BATRK
$3.26B
| $438K | ﹤0.01% |
9,300
+3,000
| +48% | +$125K |
|
3424
PUT
Transmedics
TMDX
$2.63B
| $437K | ﹤0.01% |
4,400
-1,400
| -24% | -$183K |
|
3425
CALL
Kura Oncology
KURA
$826M
| $437K | ﹤0.01% |
53,800
-2,900
| -5% | -$24.9K |
|
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.