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 | |
|---|---|---|---|---|---|---|
1376
CALL
Invitation Homes
INVH
$17.7B
| $6.73M | ﹤0.01% |
189,100
+60,200
| +47% | +$2.04M |
|
1377
Nice
NICE
$5.29B
| $6.73M | ﹤0.01% |
25,829
-6,969
| -21% | -$1.58M |
|
1378
CALL
PureCycle Technologies
PCT
$1.17B
| $6.72M | ﹤0.01% |
1,080,600
+507,400
| +89% | +$2.36M |
|
1379
CALL
Macerich
MAC
$7.32B
| $6.72M | ﹤0.01% |
390,000
+295,500
| +313% | +$4.82M |
|
1380
T-Mobile US
TMUS
$193B
| $6.7M | ﹤0.01% |
+41,071
| New | +$6.68M |
|
1381
CALL
United Therapeutics
UTHR
$26.3B
| $6.68M | ﹤0.01% |
29,100
+18,600
| +177% | +$4.2M |
|
1382
PUT
Ovintiv
OVV
$17.5B
| $6.68M | ﹤0.01% |
128,700
+36,600
| +40% | +$1.67M |
|
1383
PUT
Calumet Specialty Products
CLMT
$3.63B
| $6.64M | ﹤0.01% |
446,700
+385,800
| +633% | +$6.15M |
|
|
EH
1384
PUT
EHang Holdings
EH
$372M
| $6.63M | ﹤0.01% |
322,400
+144,900
| +82% | +$1.87M |
|
1385
PUT
Omnicom Group
OMC
$22.7B
| $6.63M | ﹤0.01% |
68,500
+8,300
| +14% | +$745K |
|
1386
PUT
Scotiabank
BNS
$106B
| $6.62M | ﹤0.01% |
127,900
-32,100
| -20% | -$1.54M |
|
1387
Truist Financial
TFC
$63.2B
| $6.62M | ﹤0.01% |
169,834
-31,437
| -16% | -$1.15M |
|
1388
PUT
NetEase
NTES
$76.5B
| $6.61M | ﹤0.01% |
63,900
-121,100
| -65% | -$12.4M |
|
1389
CALL
BRC Group Holdings
RILY
$277M
| $6.61M | ﹤0.01% |
312,100
+107,400
| +52% | +$2.16M |
|
1390
PUT
Aecom
ACM
$9.07B
| $6.6M | ﹤0.01% |
67,300
+46,500
| +224% | +$4.2M |
|
|
FLG
1391
CALL
Flagstar Bank National Association
FLG
$5.77B
| $6.6M | ﹤0.01% |
682,900
+574,867
| +532% | +$10.6M |
|
1392
CALL
VF Corp
VFC
$6.68B
| $6.58M | ﹤0.01% |
429,300
+10,800
| +3% | +$174K |
|
1393
CALL
Huntington Ingalls Industries
HII
$11.3B
| $6.56M | ﹤0.01% |
22,500
+8,300
| +58% | +$2.29M |
|
1394
CALL
ACM Research
ACMR
$5.83B
| $6.55M | ﹤0.01% |
224,800
+82,400
| +58% | +$1.89M |
|
|
MRO
1395
DELISTED
Marathon Oil Corporation
MRO
| $6.54M | ﹤0.01% |
230,659
+99,795
| +76% | +$2.41M |
|
1396
PUT
Labcorp
LH
$24.3B
| $6.53M | ﹤0.01% |
29,900
-32,800
| -52% | -$7.23M |
|
1397
CALL
Verisk Analytics
VRSK
$26.4B
| $6.53M | ﹤0.01% |
27,700
+27,400
| +9,133% | +$6.58M |
|
|
HES
1398
CALL
DELISTED
Hess
HES
| $6.5M | ﹤0.01% |
42,600
-94,500
| -69% | -$13.7M |
|
1399
PUT
Thor Industries
THO
$3.99B
| $6.5M | ﹤0.01% |
55,400
+6,000
| +12% | +$688K |
|
1400
PUT
Lincoln National
LNC
$7.91B
| $6.49M | ﹤0.01% |
203,400
+66,100
| +48% | +$1.83M |
|
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.