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 | |
|---|---|---|---|---|---|---|
|
SHNY
676
CALL
DELISTED
Direxion Daily Silver Miners Index Bull 2X Shares
SHNY
| $20.7M | 0.01% |
1,681,600
+15,800
| +0.9% | +$194K |
|
677
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $20.6M | 0.01% |
21,400
-7,500
| -26% | -$7.13M |
|
678
PUT
Equinix
EQIX
$102B
| $20.6M | 0.01% |
24,900
+12,400
| +99% | +$10.4M |
|
679
CALL
GitLab
GTLB
$5.11B
| $20.5M | 0.01% |
352,000
+133,800
| +61% | +$8.77M |
|
680
CALL
MetLife
MET
$59.6B
| $20.5M | 0.01% |
276,000
-276,600
| -50% | -$19.3M |
|
681
PUT
Akamai
AKAM
$17.1B
| $20.4M | 0.01% |
187,700
+51,600
| +38% | +$5.95M |
|
682
PUT
Upstart Holdings
UPST
$2.64B
| $20.4M | 0.01% |
759,000
-329,000
| -30% | -$9.73M |
|
683
PUT
Vertex Pharmaceuticals
VRTX
$120B
| $20.4M | 0.01% |
48,800
-73,100
| -60% | -$30.9M |
|
684
PUT
Kroger
KR
$34.2B
| $20.4M | 0.01% |
356,400
-170,500
| -32% | -$8.4M |
|
685
PUT
Zions Bancorporation
ZION
$10.1B
| $20.4M | 0.01% |
468,900
-229,400
| -33% | -$9.46M |
|
686
CALL
Constellation Brands
STZ
$22.1B
| $20.3M | 0.01% |
74,800
-40,700
| -35% | -$10.3M |
|
687
PUT
AutoNation
AN
$6.87B
| $20.3M | 0.01% |
122,300
+20,600
| +20% | +$3.03M |
|
688
CALL
Jabil
JBL
$33.7B
| $20.2M | 0.01% |
151,100
+9,100
| +6% | +$1.22M |
|
689
PUT
Chewy
CHWY
$8.38B
| $20.2M | 0.01% |
1,271,400
+373,700
| +42% | +$6.71M |
|
690
PUT
Microchip Technology
MCHP
$44.1B
| $20.2M | 0.01% |
225,300
-32,100
| -12% | -$2.77M |
|
691
3M
MMM
$87.5B
| $20.2M | 0.01% |
227,867
+202,330
| +792% | +$16.8M |
|
|
FISV
692
CALL
Fiserv Inc
FISV
$26.6B
| $20.2M | 0.01% |
126,400
-10,200
| -7% | -$1.49M |
|
|
693
CALL
Equinix
EQIX
$102B
| $20.1M | 0.01% |
24,400
+6,100
| +33% | +$5.13M |
|
694
PUT
Citizens Financial Group
CFG
$30.3B
| $20.1M | 0.01% |
553,800
+214,000
| +63% | +$7.02M |
|
695
CALL
C3.ai
AI
$1.27B
| $20M | 0.01% |
740,400
-2,600
| -0.3% | -$73K |
|
|
EDR
696
CALL
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $20M | 0.01% |
777,900
-194,900
| -20% | -$4.77M |
|
697
PUT
WIX.com
WIX
$2.04B
| $20M | 0.01% |
145,400
+73,700
| +103% | +$9.7M |
|
698
CALL
Abercrombie & Fitch
ANF
$4.04B
| $19.9M | 0.01% |
158,800
+1,200
| +0.8% | +$137K |
|
699
PUT
FMC
FMC
$1.47B
| $19.9M | 0.01% |
312,100
+92,900
| +42% | +$5.42M |
|
700
CALL
Realty Income
O
$60.4B
| $19.8M | 0.01% |
366,400
-7,900
| -2% | -$428K |
|
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.