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 | |
|---|---|---|---|---|---|---|
1601
CALL
Cogent Communications
CCOI
$594M
| $3.96M | ﹤0.01% |
70,200
+58,800
| +516% | +$3.51M |
|
1602
PUT
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $3.96M | ﹤0.01% |
7,400
-5,800
| -44% | -$3.12M |
|
1603
T. Rowe Price
TROW
$25B
| $3.96M | ﹤0.01% |
34,336
+17,230
| +101% | +$1.98M |
|
1604
CALL
Bath & Body Works
BBWI
$4.01B
| $3.96M | ﹤0.01% |
101,300
+2,100
| +2% | +$96.4K |
|
1605
PUT
Polaris
PII
$4.15B
| $3.95M | ﹤0.01% |
50,500
-73,800
| -59% | -$6.25M |
|
1606
PUT
Medifast
MED
$108M
| $3.94M | ﹤0.01% |
180,800
+156,300
| +638% | +$4.17M |
|
1607
CALL
Alcon
ALC
$33.1B
| $3.94M | ﹤0.01% |
44,200
-3,300
| -7% | -$282K |
|
1608
CALL
Watsco Inc
WSO
$14.9B
| $3.94M | ﹤0.01% |
8,500
-2,900
| -25% | -$1.33M |
|
|
PPLI
1609
PUT
People Inc
PPLI
$3.1B
| $3.94M | ﹤0.01% |
102,396
+79,844
| +354% | +$3.3M |
|
1610
CALL
Ares Capital
ARCC
$13.5B
| $3.93M | ﹤0.01% |
188,800
-22,100
| -10% | -$462K |
|
1611
CALL
Range Resources
RRC
$9.11B
| $3.93M | ﹤0.01% |
117,200
+40,600
| +53% | +$1.46M |
|
1612
PUT
Cboe Global Markets
CBOE
$29.8B
| $3.93M | ﹤0.01% |
23,100
+4,800
| +26% | +$852K |
|
1613
CALL
Tilray
TLRY
$479M
| $3.92M | ﹤0.01% |
236,430
+45,430
| +24% | +$872K |
|
1614
CALL
ArcelorMittal
MT
$50.4B
| $3.92M | ﹤0.01% |
170,800
-15,300
| -8% | -$391K |
|
1615
PUT
Signet Jewelers
SIG
$3.55B
| $3.91M | ﹤0.01% |
43,700
-35,800
| -45% | -$3.54M |
|
|
ECHO
1616
PUT
EchoStar
ECHO
$25.5B
| $3.9M | ﹤0.01% |
219,200
-48,300
| -18% | -$801K |
|
|
GRFS
1617
CALL
Grifois
GRFS
$5.16B
| $3.9M | ﹤0.01% |
618,200
-524,200
| -46% | -$3.64M |
|
1618
PUT
Rocket Companies
RKT
$36.9B
| $3.9M | ﹤0.01% |
284,500
+117,200
| +70% | +$1.58M |
|
1619
Invitation Homes
INVH
$17.7B
| $3.89M | ﹤0.01% |
108,459
+106,306
| +4,938% | +$3.69M |
|
1620
CALL
Lantheus
LNTH
$6.82B
| $3.89M | ﹤0.01% |
48,400
-31,700
| -40% | -$2.33M |
|
1621
PUT
TG Therapeutics
TGTX
$8.58B
| $3.88M | ﹤0.01% |
218,300
-144,900
| -40% | -$2.31M |
|
1622
CALL
Plug Power
PLUG
$2.92B
| $3.88M | ﹤0.01% |
1,664,500
-1,000,900
| -38% | -$2.87M |
|
1623
CALL
Copart
CPRT
$25.9B
| $3.88M | ﹤0.01% |
71,600
-155,500
| -68% | -$8.49M |
|
1624
PUT
InMode
INMD
$872M
| $3.88M | ﹤0.01% |
212,600
-62,900
| -23% | -$1.16M |
|
1625
PUT
Toast
TOST
$16.8B
| $3.87M | ﹤0.01% |
150,300
-160,400
| -52% | -$3.88M |
|
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.