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 | |
|---|---|---|---|---|---|---|
576
PUT
TFI International
TFII
$12.5B
| $25.3M | 0.01% |
158,700
+140,700
| +782% | +$20.1M |
|
577
PUT
Core & Main
CNM
$8.18B
| $25.3M | 0.01% |
441,300
+258,500
| +141% | +$11.8M |
|
|
GAP
578
CALL
The Gap Inc
GAP
$6.86B
| $25.3M | 0.01% |
916,800
+400,300
| +78% | +$8.44M |
|
579
PUT
Rio Tinto
RIO
$149B
| $25.3M | 0.01% |
396,200
+26,200
| +7% | +$1.75M |
|
580
CALL
Vertex Pharmaceuticals
VRTX
$121B
| $25.2M | 0.01% |
60,400
-33,600
| -36% | -$14.2M |
|
581
CALL
Truist Financial
TFC
$62.1B
| $25.2M | 0.01% |
647,000
-428,300
| -40% | -$15.7M |
|
582
PUT
Expedia Group
EXPE
$30.4B
| $25.1M | 0.01% |
182,400
-44,200
| -20% | -$6.28M |
|
583
PUT
Tyson Foods
TSN
$19.9B
| $25.1M | 0.01% |
426,800
+28,100
| +7% | +$1.54M |
|
584
CALL
W.W. Grainger
GWW
$64.4B
| $25M | 0.01% |
24,600
-900
| -4% | -$839K |
|
585
PUT
Lyft
LYFT
$5.2B
| $25M | 0.01% |
1,292,900
-34,500
| -3% | -$529K |
|
586
PUT
AT&T
T
$158B
| $25M | 0.01% |
1,419,500
-584,700
| -29% | -$9.98M |
|
587
PUT
KLA
KLAC
$282B
| $24.9M | 0.01% |
357,000
-419,000
| -54% | -$26.9M |
|
588
CALL
Cadence Design Systems
CDNS
$92.5B
| $24.8M | 0.01% |
79,700
-200
| -0.3% | -$59.2K |
|
589
PUT
SoFi Technologies
SOFI
$21.4B
| $24.8M | 0.01% |
3,397,600
-2,269,400
| -40% | -$18M |
|
590
PUT
MetLife
MET
$59.4B
| $24.7M | 0.01% |
332,700
-95,000
| -22% | -$6.62M |
|
591
CALL
Sony
SONY
$121B
| $24.6M | 0.01% |
1,436,500
+620,000
| +76% | +$11.4M |
|
592
CALL
HP
HPQ
$22.8B
| $24.5M | 0.01% |
810,500
-66,500
| -8% | -$1.96M |
|
593
PUT
Tenet Healthcare
THC
$16.8B
| $24.5M | 0.01% |
233,000
+18,700
| +9% | +$1.68M |
|
594
CALL
Honeywell
HON
$78.8B
| $24.4M | 0.01% |
126,365
-147,479
| -54% | -$27.8M |
|
595
CALL
SentinelOne
S
$6.05B
| $24.4M | 0.01% |
1,045,800
+162,400
| +18% | +$4.24M |
|
|
NVO
596
Novo Nordisk
NVO
$216B
| $24.4M | 0.01% |
189,656
+116,505
| +159% | +$13.9M |
|
597
PUT
Etsy
ETSY
$7.41B
| $24.3M | 0.01% |
353,600
-5,100
| -1% | -$366K |
|
598
CALL
Clorox
CLX
$11.4B
| $24.3M | 0.01% |
158,600
-73,900
| -32% | -$11M |
|
599
CALL
Emerson Electric
EMR
$80.5B
| $24.2M | 0.01% |
213,700
-34,000
| -14% | -$3.49M |
|
|
IPFF
600
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $24.1M | 0.01% |
473,900
+125,100
| +36% | +$6.36M |
|
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.