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 | |
|---|---|---|---|---|---|---|
6251
PUT
Movado Group
MOV
$849M
| $50K | ﹤0.01% |
+1,800
| New | +$50.4K |
|
6252
CALL
NewtekOne
NEWT
$428M
| $50K | ﹤0.01% |
4,600
+3,400
| +283% | +$40.1K |
|
|
NFGC
6253
New Found Gold
NFGC
$522M
| $50K | ﹤0.01% |
13,570
-22,729
| -63% | -$75.7K |
|
6254
PUT
OPAL Fuels
OPAL
$71.3M
| $50K | ﹤0.01% |
+10,000
| New | +$49K |
|
|
SKE
6255
Skeena Resources
SKE
$3.3B
| $50K | ﹤0.01% |
11,016
-2,177
| -17% | -$9.18K |
|
|
THS
6256
CALL
DELISTED
Treehouse Foods
THS
| $50K | ﹤0.01% |
1,300
+200
| +18% | +$7.92K |
|
|
TSVT
6257
DELISTED
2seventy bio
TSVT
| $50K | ﹤0.01% |
9,491
+1,394
| +17% | +$6.56K |
|
6258
PUT
American Well
AMWL
$180M
| $49K | ﹤0.01% |
3,035
+2,730
| +895% | +$58.6K |
|
6259
PUT
Autohome
ATHM
$2.67B
| $49K | ﹤0.01% |
1,900
-14,000
| -88% | -$364K |
|
6260
PUT
Biohaven
BHVN
$2.03B
| $49K | ﹤0.01% |
900
-2,300
| -72% | -$114K |
|
6261
PUT
Boston Omaha
BOC
$428M
| $49K | ﹤0.01% |
+3,200
| New | +$50.3K |
|
6262
Capitol Federal Financial
CFFN
$1.09B
| $49K | ﹤0.01% |
8,330
+3,324
| +66% | +$19.8K |
|
6263
PUT
Cognyte Software
CGNT
$659M
| $49K | ﹤0.01% |
+6,000
| New | +$42.5K |
|
6264
PUT
ClearPoint Neuro
CLPT
$448M
| $49K | ﹤0.01% |
7,300
+5,700
| +356% | +$39.8K |
|
|
CMPS
6265
PUT
Compass Pathways
CMPS
$1.53B
| $49K | ﹤0.01% |
6,000
-8,400
| -58% | -$84.6K |
|
6266
Cogent Biosciences
COGT
$6.65B
| $49K | ﹤0.01% |
+7,303
| New | +$45.1K |
|
6267
PUT
Vaalco Energy
EGY
$570M
| $49K | ﹤0.01% |
7,100
+900
| +15% | +$4.22K |
|
6268
Invesco CurrencyShares British Pound Sterling Trust
FXB
$77.8M
| $49K | ﹤0.01% |
+404
| New | +$49.3K |
|
6269
CALL
Golub Capital BDC
GBDC
$3.34B
| $49K | ﹤0.01% |
3,000
-3,900
| -57% | -$60.9K |
|
6270
PUT
Knowles
KN
$3.13B
| $49K | ﹤0.01% |
3,100
+3,000
| +3,000% | +$49.1K |
|
6271
PUT
Kosmos Energy
KOS
$1.6B
| $49K | ﹤0.01% |
8,300
-6,400
| -44% | -$38.5K |
|
6272
PUT
Medallion Financial
MFIN
$229M
| $49K | ﹤0.01% |
6,200
-300
| -5% | -$2.7K |
|
6273
CALL
Envista
NVST
$4.44B
| $49K | ﹤0.01% |
2,300
-2,100
| -48% | -$47.6K |
|
6274
Ribbon Communications
RBBN
$377M
| $49K | ﹤0.01% |
15,451
+295
| +2% | +$897 |
|
6275
Dr. Reddy's Laboratories
RDY
$9.87B
| $49K | ﹤0.01% |
3,375
+2,035
| +152% | +$29.7K |
|
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.