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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
PXD
1576
CALL
DELISTED
Pioneer Natural Resource Co.
PXD
| $5.25M | ﹤0.01% |
20,000
-13,200
| -40% | -$3.1M |
|
1577
CALL
Genuine Parts
GPC
$17.1B
| $5.24M | ﹤0.01% |
33,800
-10,700
| -24% | -$1.56M |
|
|
SWN
1578
CALL
DELISTED
Southwestern Energy Company
SWN
| $5.21M | ﹤0.01% |
688,000
+17,900
| +3% | +$122K |
|
1579
PUT
StoneCo
STNE
$2.62B
| $5.19M | ﹤0.01% |
312,500
-36,800
| -11% | -$631K |
|
1580
PUT
Brookfield Asset Management
BAM
$74B
| $5.19M | ﹤0.01% |
123,500
+68,100
| +123% | +$2.75M |
|
1581
PUT
Monster Beverage
MNST
$91.4B
| $5.18M | ﹤0.01% |
87,400
-17,000
| -16% | -$977K |
|
1582
PUT
Valley National Bancorp
VLY
$7.93B
| $5.18M | ﹤0.01% |
650,900
+303,200
| +87% | +$2.7M |
|
1583
PUT
First Horizon
FHN
$12.1B
| $5.17M | ﹤0.01% |
335,700
+279,500
| +497% | +$4.01M |
|
1584
CALL
PG&E
PCG
$47.8B
| $5.17M | ﹤0.01% |
308,400
+33,000
| +12% | +$553K |
|
1585
CALL
Gen Digital
GEN
$15.6B
| $5.16M | ﹤0.01% |
230,200
+164,100
| +248% | +$3.64M |
|
|
GES
1586
PUT
DELISTED
Guess Inc
GES
| $5.15M | ﹤0.01% |
163,800
+31,000
| +23% | +$763K |
|
1587
CALL
Tidewater
TDW
$3.91B
| $5.14M | ﹤0.01% |
55,900
-2,300
| -4% | -$172K |
|
1588
PUT
WisdomTree US Total Dividend Fund
DTD
$1.65B
| $5.14M | ﹤0.01% |
48,200
+11,300
| +31% | +$760K |
|
1589
CALL
ArcelorMittal
MT
$50.4B
| $5.13M | ﹤0.01% |
186,100
-212,500
| -53% | -$5.73M |
|
1590
CALL
Repligen
RGEN
$7.44B
| $5.13M | ﹤0.01% |
27,900
-39,100
| -58% | -$7.45M |
|
1591
CALL
Melco Resorts & Entertainment
MLCO
$2.1B
| $5.13M | ﹤0.01% |
711,000
+179,700
| +34% | +$1.44M |
|
1592
CALL
Jack in the Box
JACK
$278M
| $5.1M | ﹤0.01% |
74,500
+61,100
| +456% | +$4.6M |
|
1593
iShares MSCI Brazil ETF
EWZ
$9.05B
| $5.1M | ﹤0.01% |
+157,247
| New | +$5.2M |
|
1594
PUT
Asbury Automotive
ABG
$4.19B
| $5.09M | ﹤0.01% |
21,600
+21,400
| +10,700% | +$4.54M |
|
1595
PUT
Celestica
CLS
$35.1B
| $5.09M | ﹤0.01% |
113,300
+74,400
| +191% | +$2.82M |
|
1596
CALL
Equifax
EFX
$20.3B
| $5.08M | ﹤0.01% |
19,000
-19,200
| -50% | -$4.89M |
|
1597
CALL
Xerox
XRX
$337M
| $5.06M | ﹤0.01% |
282,800
+99,700
| +54% | +$1.75M |
|
1598
CALL
International Paper
IP
$22.3B
| $5.06M | ﹤0.01% |
129,600
-143,500
| -53% | -$5.21M |
|
1599
State Street SPDR S&P Homebuilders ETF
XHB
$1.74B
| $5.05M | ﹤0.01% |
45,248
+17,119
| +61% | +$1.71M |
|
1600
PUT
American Water Works
AWK
$26.3B
| $5.04M | ﹤0.01% |
41,200
+8,400
| +26% | +$1.03M |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.