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 | |
|---|---|---|---|---|---|---|
3751
Ferguson
FERG
$45B
| $555K | ﹤0.01% |
2,544
-11,908
| -82% | -$2.37M |
|
|
LAC
3752
PUT
Lithium Americas
LAC
$972M
| $554K | ﹤0.01% |
75,900
-64,000
| -46% | -$332K |
|
3753
PUT
Sunoco
SUN
$14.4B
| $554K | ﹤0.01% |
9,200
+600
| +7% | +$36.3K |
|
3754
Alerian MLP ETF
AMLP
$12.9B
| $553K | ﹤0.01% |
11,655
-18,767
| -62% | -$843K |
|
3755
CALL
CVB Financial
CVBF
$4.02B
| $553K | ﹤0.01% |
31,000
+30,900
| +30,900% | +$548K |
|
3756
PUT
Consolidated Edison
ED
$41.3B
| $553K | ﹤0.01% |
6,100
-26,700
| -81% | -$2.39M |
|
3757
Kodak
KODK
$812M
| $553K | ﹤0.01% |
111,727
+31,500
| +39% | +$126K |
|
|
LAZR
3758
PUT
DELISTED
Luminar Technologies
LAZR
| $553K | ﹤0.01% |
18,747
+10,894
| +139% | +$397K |
|
3759
Synaptics
SYNA
$4.33B
| $553K | ﹤0.01% |
+5,677
| New | +$597K |
|
3760
CALL
indie Semiconductor
INDI
$678M
| $552K | ﹤0.01% |
78,000
-26,400
| -25% | -$179K |
|
3761
PUT
Manulife Financial
MFC
$74.2B
| $552K | ﹤0.01% |
22,100
+5,700
| +35% | +$131K |
|
3762
PUT
Federal Agricultural Mortgage Class A
AGM.A
$1.62B
| $551K | ﹤0.01% |
2,800
+1,800
| +180% | +$268K |
|
|
NARI
3763
CALL
DELISTED
Inari Medical, Inc. Common Stock
NARI
| $551K | ﹤0.01% |
11,500
+4,700
| +69% | +$251K |
|
3764
East-West Bancorp
EWBC
$18B
| $550K | ﹤0.01% |
6,959
-40,355
| -85% | -$2.95M |
|
3765
PUT
Banco Macro
BMA
$5.81B
| $549K | ﹤0.01% |
11,400
-6,300
| -36% | -$223K |
|
3766
CALL
Globalstar
GSAT
$10.2B
| $549K | ﹤0.01% |
27,920
-4,547
| -14% | -$110K |
|
3767
First Majestic Silver
AG
$7.75B
| $547K | ﹤0.01% |
93,031
-186,039
| -67% | -$932K |
|
3768
PUT
Healthcare Realty
HR
$7.58B
| $546K | ﹤0.01% |
38,600
+20,900
| +118% | +$315K |
|
3769
PUT
Navigator Holdings
NVGS
$1.34B
| $546K | ﹤0.01% |
35,600
+35,300
| +11,767% | +$544K |
|
3770
Universal Technical Institute
UTI
$2.15B
| $546K | ﹤0.01% |
34,296
+27,752
| +424% | +$403K |
|
3771
PUT
VistaGen Therapeutics
VTGN
$9.55M
| $545K | ﹤0.01% |
103,300
+98,900
| +2,248% | +$476K |
|
3772
CALL
BlackBerry
BB
$4.74B
| $544K | ﹤0.01% |
197,300
-218,000
| -52% | -$637K |
|
3773
CALL
Bausch + Lomb
BLCO
$5.92B
| $544K | ﹤0.01% |
31,500
+5,400
| +21% | +$83.9K |
|
3774
CALL
RadNet
RDNT
$4.97B
| $544K | ﹤0.01% |
11,200
-3,600
| -24% | -$145K |
|
3775
Aurinia Pharmaceuticals
AUPH
$1.92B
| $543K | ﹤0.01% |
108,528
-96,007
| -47% | -$651K |
|
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.