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 | |
|---|---|---|---|---|---|---|
7651
Celularity
CELU
$21.7M
| $9K | ﹤0.01% |
+1,757
| New | +$7.22K |
|
7652
CEVA Inc
CEVA
$980M
| $9K | ﹤0.01% |
416
-285
| -41% | -$6.23K |
|
7653
CALL
Traeger
COOK
$170M
| $9K | ﹤0.01% |
+76
| New | +$8.66K |
|
7654
Clearway Energy Class C
CWEN
$5B
| $9K | ﹤0.01% |
402
-104
| -21% | -$2.44K |
|
7655
PUT
California Water Service
CWT
$3.04B
| $9K | ﹤0.01% |
+200
| New | +$9.38K |
|
7656
Designer Brands
DBI
$298M
| $9K | ﹤0.01% |
866
-61,574
| -99% | -$590K |
|
7657
PUT
DLH Holdings
DLHC
$75.7M
| $9K | ﹤0.01% |
+700
| New | +$10.8K |
|
7658
PUT
Douglas Elliman
DOUG
$158M
| $9K | ﹤0.01% |
5,800
+800
| +16% | +$1.64K |
|
7659
PUT
Descartes Systems
DSGX
$6.09B
| $9K | ﹤0.01% |
+100
| New | +$8.79K |
|
7660
Erasca
ERAS
$6.55B
| $9K | ﹤0.01% |
4,632
+3,062
| +195% | +$6.12K |
|
|
ETWO
7661
DELISTED
E2open Parent Holdings
ETWO
| $9K | ﹤0.01% |
+2,046
| New | +$8.27K |
|
|
HYPD
7662
PUT
Hyperion DeFi Inc
HYPD
$38.8M
| $9K | ﹤0.01% |
+120
| New | +$16.3K |
|
7663
PUT
Fate Therapeutics
FATE
$283M
| $9K | ﹤0.01% |
+1,300
| New | +$8.05K |
|
7664
CALL
Fortress Biotech
FBIO
$109M
| $9K | ﹤0.01% |
4,700
+3,300
| +236% | +$6.57K |
|
7665
PUT
Fulcrum Therapeutics
FULC
$249M
| $9K | ﹤0.01% |
+1,000
| New | +$8.93K |
|
|
GAMB
7666
CALL
DELISTED
Gambling.com
GAMB
| $9K | ﹤0.01% |
1,000
-9,300
| -90% | -$84.4K |
|
|
TDAY
7667
CALL
USA Today Co
TDAY
$1.22B
| $9K | ﹤0.01% |
3,700
-6,700
| -64% | -$15.1K |
|
7668
Direxion Daily GOOGL Bull 2X ETF
GGLL
$836M
| $9K | ﹤0.01% |
+272
| New | +$8.83K |
|
|
MRDN
7669
Meridian Holdings Inc
MRDN
$174M
| $9K | ﹤0.01% |
276
+141
| +104% | +$4.74K |
|
7670
Grove Collaborative
GROV
$45.8M
| $9K | ﹤0.01% |
+5,691
| New | +$10.5K |
|
7671
Horizon Bancorp
HBNC
$1.05B
| $9K | ﹤0.01% |
717
+542
| +310% | +$6.92K |
|
7672
CALL
HNI Corp
HNI
$3.09B
| $9K | ﹤0.01% |
200
-2,200
| -92% | -$93.3K |
|
7673
PUT
Hancock Whitney
HWC
$6.07B
| $9K | ﹤0.01% |
+200
| New | +$8.88K |
|
7674
CALL
IHS Holding
IHS
$2.77B
| $9K | ﹤0.01% |
2,700
-19,500
| -88% | -$66.6K |
|
7675
Kenon Holdings
KEN
$3.64B
| $9K | ﹤0.01% |
367
+85
| +30% | +$2.12K |
|
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.