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 | |
|---|---|---|---|---|---|---|
6926
CALL
Armstrong World Industries
AWI
$6.5B
| $16.5K | ﹤0.01% |
+100
| New | +$18.3K |
|
6927
PUT
Kenon Holdings
KEN
$3.51B
| $16.5K | ﹤0.01% |
200
-100
| -33% | -$7.71K |
|
6928
eHealth
EHTH
$46M
| $16.5K | ﹤0.01% |
+12,766
| New | +$29.6K |
|
6929
Teucrium Agricultural Strategy No K-1 ETF
TILL
$38.6M
| $16.3K | ﹤0.01% |
+881
| New | +$15.2K |
|
6930
Wabash National
WNC
$540M
| $16.3K | ﹤0.01% |
1,891
-585
| -24% | -$5.81K |
|
6931
CALL
Assured Guaranty
AGO
$3.78B
| $16.3K | ﹤0.01% |
200
+100
| +100% | +$8.54K |
|
6932
CALL
Dave & Buster's
PLAY
$352M
| $16.2K | ﹤0.01% |
1,500
-78,300
| -98% | -$1.25M |
|
|
WCN
6933
CALL
Waste Connections
WCN
$42.8B
| $16.2K | ﹤0.01% |
100
-100
| -50% | -$16.7K |
|
6934
iShares Core S&P Mid-Cap ETF
IJH
$123B
| $16.2K | ﹤0.01% |
240
-853
| -78% | -$59.2K |
|
6935
CALL
SkinHealth Systems
SKIN
$98.7M
| $16.2K | ﹤0.01% |
18,200
+8,100
| +80% | +$9.94K |
|
6936
PUT
Ocean Power Technologies
OPTT
$48.5M
| $16.2K | ﹤0.01% |
46,200
+32,600
| +240% | +$14K |
|
6937
PUT
Mid Penn Bancorp
MPB
$893M
| $16.1K | ﹤0.01% |
+500
| New | +$16.2K |
|
6938
CALL
Shattuck Labs
STTK
$651M
| $16.1K | ﹤0.01% |
2,500
+2,400
| +2,400% | +$11.4K |
|
|
PPLI
6939
CALL
People Inc
PPLI
$3.33B
| $16K | ﹤0.01% |
400
| – | – |
|
|
KRMN
6940
PUT
Karman Holdings
KRMN
$5.95B
| $16K | ﹤0.01% |
200
-200
| -50% | -$19.3K |
|
6941
CALL
Red Rock Resorts
RRR
$3.75B
| $16K | ﹤0.01% |
300
-17,600
| -98% | -$1.07M |
|
6942
Vanguard Global ex-US Real Estate ETF
VNQI
$3.49B
| $16K | ﹤0.01% |
+360
| New | +$17.1K |
|
6943
State Street SPDR S&P Transportation ETF
XTN
$413M
| $16K | ﹤0.01% |
172
+119
| +225% | +$11.6K |
|
|
AARD
6944
Aardvark Therapeutics
AARD
$121M
| $16K | ﹤0.01% |
+4,243
| New | +$44K |
|
6945
Vishay Intertechnology
VSH
$6.1B
| $16K | ﹤0.01% |
887
+26
| +3% | +$473 |
|
6946
CALL
Magnachip Semiconductor
MX
$137M
| $16K | ﹤0.01% |
+5,700
| New | +$16.2K |
|
6947
UNIFI
UFI
$114M
| $15.9K | ﹤0.01% |
4,468
-528
| -11% | -$2.03K |
|
6948
TXO Partners LP
TXO
$713M
| $15.9K | ﹤0.01% |
1,267
+996
| +368% | +$12K |
|
|
GTY
6949
PUT
Getty Realty Corp
GTY
$2.21B
| $15.9K | ﹤0.01% |
500
+200
| +67% | +$6.25K |
|
6950
PUT
TIM SA
TIMB
$10.6B
| $15.9K | ﹤0.01% |
+600
| New | +$14.7K |
|
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.