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 | |
|---|---|---|---|---|---|---|
2451
PUT
Douglas Emmett
DEI
$2.06B
| $1.55M | ﹤0.01% |
116,900
+90,200
| +338% | +$1.22M |
|
2452
CALL
JFrog
FROG
$9.71B
| $1.55M | ﹤0.01% |
41,400
-44,700
| -52% | -$1.64M |
|
|
OPRA
2453
CALL
Opera Ltd
OPRA
$1.65B
| $1.55M | ﹤0.01% |
110,700
+35,300
| +47% | +$502K |
|
2454
CALL
Kosmos Energy
KOS
$1.56B
| $1.55M | ﹤0.01% |
280,500
-46,500
| -14% | -$271K |
|
2455
PUT
Payoneer
PAYO
$2.41B
| $1.55M | ﹤0.01% |
280,200
-125,700
| -31% | -$680K |
|
|
CALY
2456
CALL
Callaway Golf Company
CALY
$3.26B
| $1.55M | ﹤0.01% |
101,400
-15,500
| -13% | -$242K |
|
2457
PG&E
PCG
$47.8B
| $1.55M | ﹤0.01% |
88,837
+549
| +0.6% | +$9.66K |
|
2458
PUT
Aramark
ARMK
$15B
| $1.55M | ﹤0.01% |
48,400
-11,000
| -19% | -$357K |
|
2459
CALL
Natera
NTRA
$37.5B
| $1.55M | ﹤0.01% |
14,300
+1,800
| +14% | +$183K |
|
2460
CALL
MakeMyTrip
MMYT
$4.67B
| $1.55M | ﹤0.01% |
18,400
-3,400
| -16% | -$254K |
|
2461
Okta
OKTA
$24.1B
| $1.54M | ﹤0.01% |
16,492
-15,934
| -49% | -$1.51M |
|
2462
PUT
Dime Commercial Bancshares
DCOM
$1.75B
| $1.54M | ﹤0.01% |
75,600
+51,400
| +212% | +$969K |
|
2463
CALL
Ovintiv
OVV
$17.5B
| $1.54M | ﹤0.01% |
32,900
-104,500
| -76% | -$5.26M |
|
2464
PUT
Sturm, Ruger & Co
RGR
$610M
| $1.54M | ﹤0.01% |
37,000
+8,400
| +29% | +$372K |
|
2465
PUT
Cheesecake Factory
CAKE
$4.21B
| $1.54M | ﹤0.01% |
39,200
+10,200
| +35% | +$378K |
|
2466
PUT
Illinois Tool Works
ITW
$81.4B
| $1.54M | ﹤0.01% |
6,500
-13,800
| -68% | -$3.41M |
|
|
JMIA
2467
Jumia Technologies
JMIA
$726M
| $1.54M | ﹤0.01% |
219,251
+138,222
| +171% | +$851K |
|
2468
PUT
TeraWulf
WULF
$9.15B
| $1.54M | ﹤0.01% |
345,800
+71,000
| +26% | +$192K |
|
2469
PUT
Atea Pharmaceuticals
AVIR
$379M
| $1.54M | ﹤0.01% |
464,400
+47,000
| +11% | +$175K |
|
2470
CALL
FLEX LNG
FLNG
$1.67B
| $1.53M | ﹤0.01% |
56,800
-9,600
| -14% | -$261K |
|
2471
PUT
Braze
BRZE
$2.45B
| $1.53M | ﹤0.01% |
39,400
+1,700
| +5% | +$67.8K |
|
2472
PUT
Xerox
XRX
$337M
| $1.52M | ﹤0.01% |
131,300
-48,500
| -27% | -$704K |
|
2473
Dover
DOV
$27.2B
| $1.52M | ﹤0.01% |
8,443
+4,568
| +118% | +$818K |
|
2474
CALL
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.9B
| $1.52M | ﹤0.01% |
51,400
+28,500
| +124% | +$833K |
|
2475
PUT
Wendy's
WEN
$1.33B
| $1.52M | ﹤0.01% |
89,700
+10,900
| +14% | +$198K |
|
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.