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 | |
|---|---|---|---|---|---|---|
1576
CALL
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $4.14M | ﹤0.01% |
209,700
-134,500
| -39% | -$12.3M |
|
1577
CALL
Sphere Entertainment
SPHR
$4.88B
| $4.14M | ﹤0.01% |
118,100
-52,100
| -31% | -$2.03M |
|
1578
CALL
Cirrus Logic
CRUS
$6.74B
| $4.14M | ﹤0.01% |
32,400
+15,200
| +88% | +$1.59M |
|
1579
CALL
Core & Main
CNM
$8.17B
| $4.13M | ﹤0.01% |
84,500
-63,700
| -43% | -$3.54M |
|
1580
CALL
Louisiana-Pacific
LPX
$5.2B
| $4.12M | ﹤0.01% |
50,000
-8,100
| -14% | -$676K |
|
1581
CALL
Quest Diagnostics
DGX
$25.1B
| $4.11M | ﹤0.01% |
30,000
-5,100
| -15% | -$698K |
|
1582
PUT
Domo
DOMO
$166M
| $4.11M | ﹤0.01% |
531,900
+187,500
| +54% | +$1.4M |
|
1583
PUT
Restaurant Brands International
QSR
$25.1B
| $4.1M | ﹤0.01% |
58,300
-35,000
| -38% | -$2.5M |
|
1584
CALL
OneMain Financial
OMF
$6.9B
| $4.09M | ﹤0.01% |
84,400
+4,100
| +5% | +$202K |
|
1585
Comcast
CMCSA
$79.1B
| $4.08M | ﹤0.01% |
104,298
-42,490
| -29% | -$1.66M |
|
1586
CALL
Ionis Pharmaceuticals
IONS
$9.35B
| $4.07M | ﹤0.01% |
85,400
+5,100
| +6% | +$209K |
|
1587
PUT
Under Armour Class C
UA
$2.92B
| $4.06M | ﹤0.01% |
609,300
+36,400
| +6% | +$241K |
|
1588
CALL
Yeti Holdings
YETI
$3.82B
| $4.05M | ﹤0.01% |
106,300
+1,600
| +2% | +$62.3K |
|
1589
CALL
VF Corp
VFC
$6.68B
| $4.05M | ﹤0.01% |
300,300
-129,000
| -30% | -$1.69M |
|
1590
CALL
Genuine Parts
GPC
$17.1B
| $4.05M | ﹤0.01% |
29,300
-4,500
| -13% | -$671K |
|
1591
PUT
iShares Convertible Bond ETF
ICVT
$7.23B
| $4.05M | ﹤0.01% |
121,100
+38,500
| +47% | +$3.01M |
|
1592
CALL
Wolfspeed
WOLF
$1.2B
| $4.04M | ﹤0.01% |
177,500
-42,500
| -19% | -$1.1M |
|
1593
Direxion Daily Semiconductor Bull 3X ETF
SOXL
$18.7B
| $4.03M | ﹤0.01% |
72,855
-811,822
| -92% | -$37.8M |
|
1594
CALL
SoundHound AI
SOUN
$2.68B
| $4.02M | ﹤0.01% |
1,017,400
-317,600
| -24% | -$1.47M |
|
1595
PUT
YPF
YPF
$20.2B
| $4M | ﹤0.01% |
199,000
+22,700
| +13% | +$488K |
|
1596
CALL
PennyMac Financial
PFSI
$4.38B
| $4M | ﹤0.01% |
42,300
-8,900
| -17% | -$805K |
|
1597
PUT
Match Group
MTCH
$8.84B
| $4M | ﹤0.01% |
131,600
-264,500
| -67% | -$8.36M |
|
1598
PUT
Blackstone Mortgage Trust
BXMT
$2.82B
| $3.99M | ﹤0.01% |
229,200
+43,300
| +23% | +$781K |
|
1599
iShares Core S&P 500 ETF
IVV
$876B
| $3.98M | ﹤0.01% |
+7,269
| New | +$3.82M |
|
1600
PUT
QuantumScape Corp
QS
$3B
| $3.96M | ﹤0.01% |
805,700
-420,400
| -34% | -$2.34M |
|
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.