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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6301
PUT
IDEX
IEX
$17.3B
| $40K | ﹤0.01% |
200
| – | – |
|
6302
iShares Russell Mid-Cap Growth ETF
IWP
$19.8B
| $40K | ﹤0.01% |
364
+193
| +113% | +$21.2K |
|
|
MGIC
6303
CALL
DELISTED
Magic Software Enterprises
MGIC
| $40K | ﹤0.01% |
4,200
+2,800
| +200% | +$31.5K |
|
6304
Microvision
MVIS
$85.7M
| $40K | ﹤0.01% |
38,080
-52,592
| -58% | -$69.2K |
|
6305
NewMarket
NEU
$7.97B
| $40K | ﹤0.01% |
+79
| New | +$43.9K |
|
6306
PUT
Alpha Architect US Quantitative Value ETF
QVAL
$587M
| $40K | ﹤0.01% |
1,300
+1,000
| +333% | +$43.7K |
|
6307
PUT
Reservoir Media
RSVR
$709M
| $40K | ﹤0.01% |
5,100
+100
| +2% | +$797 |
|
6308
Ryan Specialty Holdings
RYAN
$5.71B
| $40K | ﹤0.01% |
+693
| New | +$37K |
|
|
SJT
6309
CALL
San Juan Basin Royalty Trust
SJT
$120M
| $40K | ﹤0.01% |
9,900
-4,400
| -31% | -$19.3K |
|
6310
SkyWater Technology
SKYT
$1.6B
| $40K | ﹤0.01% |
5,298
+885
| +20% | +$7.68K |
|
6311
CALL
Similarweb
SMWB
$632M
| $40K | ﹤0.01% |
5,200
-3,900
| -43% | -$30.4K |
|
6312
Spear Alpha ETF
SPRX
$199M
| $40K | ﹤0.01% |
+1,710
| New | +$38.7K |
|
|
SVM
6313
CALL
Silvercorp Metals
SVM
$2.13B
| $40K | ﹤0.01% |
12,000
-8,400
| -41% | -$30.4K |
|
6314
PUT
Verra Mobility
VRRM
$781M
| $40K | ﹤0.01% |
1,500
+1,200
| +400% | +$31K |
|
6315
PUT
Wave Life Sciences
WVE
$1.11B
| $40K | ﹤0.01% |
8,100
+4,800
| +145% | +$27.4K |
|
|
ALTR
6316
DELISTED
Altair Engineering Inc
ALTR
| $40K | ﹤0.01% |
+415
| New | +$36.5K |
|
|
NWECW
6317
PUT
DELISTED
NORTHWESTERN CORPORATION WARANTS
NWECW
| $40K | ﹤0.01% |
800
+700
| +700% | +$35K |
|
6318
PUT
AXT Inc
AXTI
$3.07B
| $39K | ﹤0.01% |
11,700
-26,400
| -69% | -$92.3K |
|
6319
PUT
Traeger
COOK
$171M
| $39K | ﹤0.01% |
332
+62
| +23% | +$7.16K |
|
6320
PUT
Energy Recovery
ERII
$435M
| $39K | ﹤0.01% |
3,000
+2,800
| +1,400% | +$38.6K |
|
|
GAU
6321
CALL
Galiano Gold
GAU
$468M
| $39K | ﹤0.01% |
22,800
+21,500
| +1,654% | +$35.1K |
|
6322
PUT
Hycroft Mining Holding Corp
HYMC
$1.87B
| $39K | ﹤0.01% |
16,600
+11,900
| +253% | +$38.8K |
|
6323
PUT
Itron
ITRI
$4.33B
| $39K | ﹤0.01% |
400
-400
| -50% | -$40.3K |
|
6324
Lincoln Educational Services
LINC
$1.33B
| $39K | ﹤0.01% |
3,340
-2,266
| -40% | -$24.7K |
|
6325
PUT
El Pollo Loco
LOCO
$502M
| $39K | ﹤0.01% |
3,500
-5,900
| -63% | -$58.8K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.